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Guan S, Wang L, Hao L, Yoshida H, Itoi T, Lu Y, Terashima C, Fujishima A. Achieving water-floatable photocatalyst on recycled bamboo chopsticks. Sci Rep 2024; 14:9496. [PMID: 38664484 PMCID: PMC11045838 DOI: 10.1038/s41598-024-60272-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 04/21/2024] [Indexed: 04/28/2024] Open
Abstract
Disposable bamboo chopsticks (DBCs) are difficult to recycle, which inevitably cause secondary pollution. Based on energy and environmental issues, we propose a facile strategy to fabricate floatable photocatalyst (fPC) coated onto DBCs, which can be flexibly used in water purification. The photocatalyst of titania and titanium carbide on bamboo (TiO2/TiC@b) was successfully constructed from TiC-Ti powders and DBCs using a coating technique followed heat treatment in carbon powder, and the fPC exhibited excellent photocatalytic activity under visible light irradation. The analysis results indicate that rutile TiO2 forms on TiC during heat treatment, achieving a low-density material with an average value of approximately 0.5233 g/cm3. The coatings of TiO2/TiC on the bamboo are firm and uniform, with a particle size of about 20-50 nm. XPS results show that a large amount of oxygen vacancies is generated, due to the reaction atmosphere of more carbon and less oxygen, further favoring to narrowing the band gap of TiO2. Furthermore, TiO2 formed on residual TiC would induce the formation of a heterojunction, which effectively inhibits the photogenerated electron-hole recombination via the charge transfer effect. Notably, the degradation of dye Rhodamine B (Rh.B) is 62.4% within 3 h, while a previous adsorption of 36.0% for 1 h. The excellent photocatalytic performance of TiO2/TiC@b can be attributed to the enhanced reaction at the water/air interface due to the reduced light loss in water, improved visible-light response, increased accessible area and charge transfer effect. Our findings show that the proposed strategy achieves a simple, low-cost, and mass-producible method to fabricate fPC onto the used DBCs, which is expected to applied in multiple fields, especially in waste recycling and water treatment.
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Affiliation(s)
- Sujun Guan
- Research Center for Space System Innovation, Tokyo University of Science, Chiba, 2788510, Japan
| | - Lijun Wang
- School of Intelligent Manufacturing, Chengdu Technological University, Chengdu, 610031, China.
| | - Liang Hao
- College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin, 300222, China
| | - Hiroyuki Yoshida
- Chiba Industrial Technology Research Institute, Chiba, 2630016, Japan
| | - Takaomi Itoi
- Graduate School and Faculty of Engineering, Chiba University, Chiba, 2638522, Japan
| | - Yun Lu
- School of Intelligent Manufacturing, Chengdu Technological University, Chengdu, 610031, China
- Graduate School and Faculty of Engineering, Chiba University, Chiba, 2638522, Japan
| | - Chiaki Terashima
- Research Center for Space System Innovation, Tokyo University of Science, Chiba, 2788510, Japan
- Department of Pure and Applied Chemistry, Tokyo University of Science, Chiba, 2788510, Japan
| | - Akira Fujishima
- Research Center for Space System Innovation, Tokyo University of Science, Chiba, 2788510, Japan
- Shanghai Institute of Photocatalysis Industrial Technology, University of Shanghai for Science and Technology, Shanghai, 200093, China
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2
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Zou F, Leng Z, Lu G, Lv S. Leaching characteristics of metals and Polycyclic Aromatic Hydrocarbons (PAHs) from asphalt paving materials. Sci Total Environ 2024; 918:170733. [PMID: 38325457 DOI: 10.1016/j.scitotenv.2024.170733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/31/2024] [Accepted: 02/03/2024] [Indexed: 02/09/2024]
Abstract
Asphalt pavement, a major type of road surface, may contain hazardous elements depending on its specific composition. A growing concern has developed regarding the potential leaching of these hazardous constituents from asphalt pavements, particularly when incorporating waste materials and additives. This study investigates the presence of heavy metals and polycyclic aromatic hydrocarbons (PAHs) in leachates from six commonly employed asphalt paving materials. A comprehensive laboratory leaching experiment was conducted on three key sample scales: asphalt binder, asphalt mortar, and asphalt mixture. The impact of the leachates was assessed by the heavy metal pollution index and the toxic equivalency factor based on the benzo[a]pyrene equivalent concentration. The results reveal that leaching tests at the binder and mortar scales provided fundamental insights into leaching characteristics within a relatively short timeframe, while the mixture-scale test was more capable of representing pollutant leaching in near-true scenarios. In addition, the results indicate potential adverse health implications associated with the incorporation of hazardous waste, such as bottom ash, into asphalt pavement. These findings hold significant implications for promoting environmentally responsible practices of asphalt pavement.
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Affiliation(s)
- Fuliao Zou
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Zhen Leng
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; Research Centre for Resources Engineering towards Carbon Neutrality, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
| | - Guoyang Lu
- Department of Architecture and Civil Engineering, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
| | - Songtao Lv
- National Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha, China
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3
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Cheng M, Fang Q, Xiao Y, Shen R, Xiong B, Zhou W. Effect of enrichment conditions of secondary feeding on the synthesis of polyhydroxyalkanoates (PHAs) by activated sludge. Environ Technol 2024:1-12. [PMID: 38450452 DOI: 10.1080/09593330.2024.2317818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 02/02/2024] [Indexed: 03/08/2024]
Abstract
Polyhydroxyalkanoates (PHAs) are biodegradable plastics with great performance and development prospects. However, their traditional anaerobic/aerobic enrichment process requires a high concentration of dissolved oxygen (DO), resulting in high energy consumption. In this study, an anaerobic/oxygen-limited with secondary feeding enrichment mode was used to enhance the synthesis of PHAs while reducing energy consumption. The enrichment process of PHAs-synthesizing bacteria lasted up to 100 days, and the experiment was conducted to investigate the change of the PHAs synthesizing ability of the system in this mode by detecting the PHAs content and community distribution of the activated sludge under different stages. Under these conditions, the system enriched two major genera of PHAs-synthesizing bacteria, Thauera (30.21%) and Thiothrix (21.30%). The content of PHAs in the sludge increased from 4.51% to 30.87% and was able to achieve a concomitant increase in poly(3-hydroxyvalerate) (PHV) monomer content. After nitrogen limitation (C/N = 150) treatment, the content of PHAs reached 63.05%. The results showed that the enrichment mode of anaerobic/oxygen-limited with secondary feeding could enrich more PHAs-synthesizing bacteria and significantly increase the synthesis amount of PHAs, which revealed the great potential of this mode in solid waste value-added and reduce the production cost of PHAs and could provide a theoretical basis for the production of PHAs from activated sludge.
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Affiliation(s)
- Meiying Cheng
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou, People's Republic of China
| | - Qian Fang
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou, People's Republic of China
| | - Yanyu Xiao
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou, People's Republic of China
| | - Ruoyu Shen
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou, People's Republic of China
| | - Bowen Xiong
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou, People's Republic of China
| | - Wuyang Zhou
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou, People's Republic of China
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Rangappa HS, Herath I, Lin C, Ch S. Industrial waste-based adsorbents as a new trend for removal of water-borne emerging contaminants. Environ Pollut 2024; 343:123140. [PMID: 38103712 DOI: 10.1016/j.envpol.2023.123140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 12/02/2023] [Accepted: 12/09/2023] [Indexed: 12/19/2023]
Abstract
Emerging contaminants in wastewater are one of the growing concerns because of their adverse effects on human health and ecosystems. Adsorption technology offers superior performance due to its cost-effectiveness, stability, recyclability, and reliability in maintaining environmental and health standards for toxic pollutants. Despite extensive research on the use of traditional adsorbents to remove emerging contaminants, their expensiveness, lack of selectivity, and complexity of regeneration remain some of the challenges. Industrial wastes viz. blast furnace slag, red mud, and copper slag can be used to develop efficacious adsorbents for the treatment of emerging contaminants in water. Advantages of the use of such industrial wastes include resource utilization, availability, cost-effectiveness, and waste management. Nevertheless, little is known so far about their application, removal efficacy, adsorption mechanisms, and limitations in the treatment of emerging contaminants. A holistic understanding of the application of such unique industrial waste-derived adsorbents in removing emerging contaminants from water is need of the hour to transform this technology from bench-scale to pilot and large-scale applications. This review investigates different water treatment techniques associated with industrial waste-based adsorbents derived from blast furnace slag, red mud, and copper slag. Besides, this review provides important insights into the growing trends of utilizing such novel types of adsorbents to remove emerging contaminants from water with an emphasis on removal efficacy, controlling measures, adsorption mechanisms, advantages, and limitations. The present timely review brings the current state of knowledge into a single reference which could be a strong platform for future research in understanding the latest advancements, decision making, and financial management related to the treatment of wastewater using industrial waste-based adsorbents.
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Affiliation(s)
- Harsha S Rangappa
- Center for Interdisciplinary Programs, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, 502285, Telangana, India; Centre for Regional and Rural Futures, Faculty of Science, Engineering and Built Environment, Deakin University, Burwood, VIC, 3125 Australia
| | - Indika Herath
- Centre for Regional and Rural Futures, Faculty of Science, Engineering and Built Environment, Deakin University, Waurn Ponds, VIC, 3216 Australia
| | - Chuxia Lin
- Centre for Regional and Rural Futures, Faculty of Science, Engineering and Built Environment, Deakin University, Burwood, VIC, 3125 Australia
| | - Subrahmanyam Ch
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana, 502285, India.
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Yoo HM, Kang JH, Lee SJ, Jang SH, Yoon YS, Kang Y. Effect analysis on waste recycling by introducing a new policy, "Environmental Assessment of Recycling," for establishment of the ESG management system in the Republic of Korea. Integr Environ Assess Manag 2024. [PMID: 38334008 DOI: 10.1002/ieam.4896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 01/01/2024] [Accepted: 01/04/2024] [Indexed: 02/10/2024]
Abstract
To move away from linear system mining-manufacture-production-disposal, most countries have been trying to establish a circular economy, by reusing waste as resources. Responding to this paradigm change, the Ministry of Environment of Korea amended the Wastes Control Act in the 2010s. To increase the recycling rate in Korea, the environmental assessment of recycling (EAR) has been introduced to improve the Wastes Control Act. The whole process of new recycling technologies can be assessed in terms of environmental or technical aspects by assessment institutes of the EAR. Finally, the governmental research institute can approve of an application case, which proves environmental friendliness, even if the technology is not defined in the current act. Recently, 17 companies have been coassessed and approved to recycle steel codes in waste tires as resources for iron smelting via assessments of the whole process, such as environmental analysis and quality assessment. The EAR has been enforcing recycling materials for six years, and the total profit of the companies that were approved was estimated to be approximately 55 million USD. However, many amendments to the EAR continue to be requested by stakeholders. In this study, the effect of the EAR was evaluated, and additional tasks were found to enhance the EAR. Integr Environ Assess Manag 2024;00:1-13. © 2024 SETAC.
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Affiliation(s)
- Heung-Min Yoo
- Department of Environmental Resources Research, National Institute of Environmental Research, Seogu, Incheon, Korea
| | - Jang-Hyun Kang
- Department of Environmental Resources Research, National Institute of Environmental Research, Seogu, Incheon, Korea
| | - Sun-Ju Lee
- Department of Environmental Resources Research, National Institute of Environmental Research, Seogu, Incheon, Korea
| | - Su-Han Jang
- Department of Environmental Resources Research, National Institute of Environmental Research, Seogu, Incheon, Korea
| | - Young-Sam Yoon
- Department of Environmental Resources Research, National Institute of Environmental Research, Seogu, Incheon, Korea
| | - Youngyeul Kang
- Department of Environmental Resources Research, National Institute of Environmental Research, Seogu, Incheon, Korea
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Garrido-Romero J, Bernard D'Souza A, Hanelt D, Abomohra A. Lipid-rich particles of processed food waste for microalgae harvest through lipid-enriched floating biomat formation. Bioresour Technol 2024; 394:130251. [PMID: 38145768 DOI: 10.1016/j.biortech.2023.130251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 12/27/2023]
Abstract
Food waste was collected from the campus canteen and lipid-rich particles (LRP) phase was evaluated to harvest Tetradesmus obliquus. Box-Behnken design showed the highest harvest efficiency (HE) of 84.69 % in run#1 (LRP = 30 %; initial OD680 = 1.75; and harvest time = 6 h). Numerical optimization ramps suggested 24.15 % (v/v) LRP ratio, initial OD680 3.00, and harvest time 3.82 h for maximum HE. Two flocs were observed, a precipitate at the bottom (B-Floc) and a floating biomat (F-Floc). Experimental results showed HE of 88.3 %, with 67 % and 33 % of the harvested biomass forming F-Floc and B-Floc, respectively. Pre-heating of LRP in a boiling water bath for 10 min (HFB-T10) promoted F-Floc proportion up to 91.6 %. In addition, HFB-T10 showed the highest FAMEs yield of 11.17 g/L of the total used volume, which was significantly higher than that of the centrifuged cells and heat-untreated biomat. Moreover, HFB-T10 showed better iodine value and cetane number of the produced biodiesel.
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Affiliation(s)
- Javier Garrido-Romero
- Aquatic Ecophysiology and Phycology, Institute of Plant Science and Microbiology, University of Hamburg, 22609 Hamburg, Germany
| | - Alston Bernard D'Souza
- Aquatic Ecophysiology and Phycology, Institute of Plant Science and Microbiology, University of Hamburg, 22609 Hamburg, Germany
| | - Dieter Hanelt
- Aquatic Ecophysiology and Phycology, Institute of Plant Science and Microbiology, University of Hamburg, 22609 Hamburg, Germany
| | - Abdelfatah Abomohra
- Aquatic Ecophysiology and Phycology, Institute of Plant Science and Microbiology, University of Hamburg, 22609 Hamburg, Germany.
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7
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Kalinitchenko VP, Swidsinski AV, Glinushkin AP, Meshalkin VP, Gudkov SV, Minkina TM, Chernenko VV, Rajput VD, Mandzhieva SS, Sushkova SN, Okolelova AA, Shestakova AA. New approach to soil management focusing on soil health and air quality: one earth one life (critical review). Environ Geochem Health 2023; 45:8967-8987. [PMID: 37138143 DOI: 10.1007/s10653-023-01550-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 03/24/2023] [Indexed: 05/05/2023]
Abstract
Soil plays a key role in ecosphere and air quality regulation. Obsolete environmental technologies lead to soil quality loss, air, water, and land systems pollution. Pedosphere and plants are intertwined with the air quality. Ionized O2 is capable to intensify atmosphere turbulence, providing particulate matter (PM2.5) coalescence and dry deposition. Addressing environmental quality, a Biogeosystem Technique (BGT*) heuristic transcendental (nonstandard and not direct imitation of nature) methodology has been developed. A BGT* main focus is an enrichment of Earth's biogeochemical cycles through land use and air cleaning. An intra-soil processing, which provides the soil multilevel architecture, is one of the BGT* ingredients. A next BGT* implementation is intra-soil pulse continuously discrete watering for optimal soil water regime and freshwater saving up to 10-20 times. The BGT* comprises intra-soil dispersed environmentally safe recycling of the PM sediments, heavy metals (HMs) and other pollutants, controlling biofilm-mediated microbial community interactions in the soil. This provides abundant biogeochemical cycle formation and better functioning of the humic substances, biological preparation, and microbial biofilms as a soil-biological starter, ensuring priority plants and trees nutrition, growth and resistance to phytopathogens. A higher underground and aboveground soil biological product increases a reversible C biological sequestration from the atmosphere. An additional light O2 ions photosynthetic production ensures a PM2.5 and PM0.1 coalescence and strengthens an intra-soil transformation of PM sediments into nutrients and improves atmosphere quality. The BGT* provides PM and HMs intra-soil passivation, increases soil biological productivity, stabilizes a climate system of the earth and promotes a green circular economy.
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Affiliation(s)
- Valery P Kalinitchenko
- Institute of Fertility of Soils of South Russia, Persianovka, Russia, 346493.
- Russian Scientific-Research Institute of Phytopathology of Russian Academy of Sciences, 143050, Big Vyazemy, Russia.
| | | | - Alexey P Glinushkin
- Russian Scientific-Research Institute of Phytopathology of Russian Academy of Sciences, 143050, Big Vyazemy, Russia
| | - Valery P Meshalkin
- Mendeleev University of Chemical Technology of Russia, Moscow, Russia, 125047
| | - Sergey V Gudkov
- Prokhorov General Physics Institute of Russian Academy of Sciences, Moscow, Russia, 119991
| | | | | | | | | | | | - Alla A Okolelova
- Volgograd State Technical University, Volgograd, Russian Federation, 400005
| | - Anna A Shestakova
- Russian State Agrarian University Moscow Timiryazev Agricultural Academy, Timiryazevskaya St., 49, Moscow, Russia, 127422
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Nurul Rizki I, Amalina I, Hasan NS, Khusnun NF, Abdul Jalil A, Firmansyah ML. Functionalized agriculture-derived biomass-based adsorbent for the continuous recovery of gold from a simulated mobile phone leachate. Chemosphere 2023; 345:140455. [PMID: 37858767 DOI: 10.1016/j.chemosphere.2023.140455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 09/30/2023] [Accepted: 10/12/2023] [Indexed: 10/21/2023]
Abstract
Electronic waste has become a global concern, as it has been steadily increasing over the years. The lack of regulation and appropriate processing facilities has rendered these wastes an environmental hazard. However, they represent excellent alternative sources of precious metals, which are highly in demand in various industries. Adsorption has been a popular method for metal removal/recovery because of several advantages, such as ease of use and low cost. In this regard, it is crucial to develop an inexpensive and functionalized adsorbent to selectively adsorb precious metals. Thus, silica, which is derived from rice husk and is abundantly present in Indonesia, was functionalized using an ionic liquid (SiRH_Im) and used for Au(III) adsorption from a simulated mobile phone leach liquor. SiRH_Im exhibited a high adsorption capacity (232.5 mg g-1). The Au(III) adsorption kinetic suitably fitted with the pseudo-second-order kinetic model. The Au(III) adsorption followed a chemisorption route that suited the monolayer model. Thomas' and Yoon-Nelson's models were well suited for the continuous Au(III) behavior. Selective recovery of Au(III) from SiRH_Im was achieved via sequential desorption. SiRH_Im also showed excellent reusability, as indicated by a negligible decrease in adsorptive performance over three cycles. The functionalization of silica derived from rice husk using an ionic liquid led to the successful creation of a solid adsorbent with a high adsorption capacity toward precious metals present in a simulated leach solution. Our results highlight the benefit of the functionalization of biomass through the immobilization of an ionic liquid toward the enhancement of its adsorption capability.
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Affiliation(s)
- Intan Nurul Rizki
- Nanotechnology Engineering, Faculty of Advanced Technology and Multidisciplinary, Airlangga University, Jl. Dr. Ir. H. Soekarno, Surabaya 60115, Indonesia; Department of Mining Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology Bandung 40132, Indonesia
| | - Ilma Amalina
- Nanotechnology Engineering, Faculty of Advanced Technology and Multidisciplinary, Airlangga University, Jl. Dr. Ir. H. Soekarno, Surabaya 60115, Indonesia
| | - Nurul Sahida Hasan
- Faculty of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
| | - Nur Farahain Khusnun
- Faculty of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
| | - Aishah Abdul Jalil
- Faculty of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, 81310 UTM Johor Bahru, Johor, Malaysia
| | - Mochamad Lutfi Firmansyah
- Nanotechnology Engineering, Faculty of Advanced Technology and Multidisciplinary, Airlangga University, Jl. Dr. Ir. H. Soekarno, Surabaya 60115, Indonesia.
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Chauhan B, Dodamani S, Malik S, Almalki WH, Haque S, Sayyed RZ. Microbial approaches for pharmaceutical wastewater recycling and management for sustainable development: A multicomponent approach. Environ Res 2023; 237:116983. [PMID: 37640091 DOI: 10.1016/j.envres.2023.116983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 08/22/2023] [Accepted: 08/23/2023] [Indexed: 08/31/2023]
Abstract
A microbial-driven approach for effluent treatment, recycling, and management of Pharmaceutical and Personal Care Products (PPCPs) has been undertaken to mitigate the menace of water contamination. Bioremediation processes are mainly considered the first preference in pharmaceutical wastewater recycling and management. PPCPs are reported as one of the primary sources of emerging contaminants in various water matrices, which raises concern and requires efficient management. Their widespread utilization, persistently high level, and resistance to breaking down make them one of the potentially dangerous compounds causing harm to the ecosystem. Continually increasing PPCPs level PPCPs contaminants in water bodies raised concern for human health as they can produce potential risks with harmful and untoward impacts on our health. PPCPs are composed of multiple diverse compounds used by humans and animals, which include biopharmaceuticals, vitamins and nutritional supplements, antibiotics, counter-prescription drugs, cosmetics products, and unused pharmaceutical products. Personal care products are found to be bioaccumulative, reduce water quality and potentially impact ecological health. However, continual exposure to PPCPs in aquatic organisms, impacts their endocrine function disruption, gene toxicity, and antibiotic resistance. Decreased water quality may result in an outbreak of various water-borne diseases, which could have acute or long-term health complications and may result in an outbreak of various water-borne diseases, which could have acute or long-term effects on public and community health. Polluted water consumption by humans and animals produces serious health hazards and increased susceptibility to water-borne diseases such as carcinogenic organic or inorganic contaminants and infectious pathogens present in water bodies. Many water resource recovery facilities working on various conventional and advanced methods involve the utilization of microbes for filtration and advanced oxidation processes. Therefore, there is an immense need for bioremediation techniques facilitated by mixed cultures of bacteria, algae, and other microbes that can be used as an alternative approach for removing pharmaceutical content from effluent. This review highlights the various sources of PPCPs and their impacts on soil and water bodies, resulting in bioaccumulation. Different techniques are utilized to detect PPCPs, and various control strategies imply controlling, recycling, and managing waste.
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Affiliation(s)
- Bindiya Chauhan
- School of Pharmacy, Faculty of Pharmacy, Parul University, Vadodara, India.
| | - Suneel Dodamani
- Dr. Prabhakar Kore Basic Science Research Center, KAHER, Belagavi, 590010, India.
| | - Sumira Malik
- Amity Institute of Biotechnology, Amity University Jharkhand, Ranchi, 834001, India.
| | - Waleed Hassan Almalki
- Department of Pharmacology, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia.
| | - Shafiul Haque
- Research & Scientific Studies Unit, College of Nursing & Allied Health Sciences, Jazan University, Jazan, 45142, Saudi Arabia; Bursa Uludağ University Faculty of Medicine, Görükle Campus, 16059, Nilüfer, Bursa, Turkey.
| | - R Z Sayyed
- Department of Microbiology, PSGVP Mandal's S I Patil Arts, G B Patel Science and STKV Sangh Commerce College, Shahada, 425409, India.
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10
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Seyedalmoosavi MM, Mielenz M, Schleifer K, Görs S, Wolf P, Tränckner J, Hüther L, Dänicke S, Daş G, Metges CC. Upcycling of recycled minerals from sewage sludge through black soldier fly larvae (Hermetia illucens): Impact on growth and mineral accumulation. J Environ Manage 2023; 344:118695. [PMID: 37542865 DOI: 10.1016/j.jenvman.2023.118695] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 07/15/2023] [Accepted: 07/25/2023] [Indexed: 08/07/2023]
Abstract
Phosphorous (P) resources are finite. Sewage sludge recyclates (SSR) are not only of interest as plant fertilizer but also as potential source of minerals in animal nutrition. However, besides P and calcium (Ca), SSR contain heavy metals. Under EU legislation, the use of SSR derivatives in animal feed is not permitted, but given the need to improve nutrient recycling, it could be an environmentally sound future mineral source. Black soldier fly larvae (BSFL) convert low-grade biomass into valuable proteins and lipids, and accumulate minerals in their body. It was hypothesized that BSFL modify and increase their mineral content in response to feeding on SSR containing substrates. The objective was to evaluate the upcycling of minerals from SSR into agri-food nutrient cycles through BSFL. Growth, nutrient and mineral composition were compared in BSFL reared either on a modified Gainesville fly diet (FD) or on FD supplemented with either 4% of biochar (FD + BCH) or 3.6% of single-superphosphate (FD + SSP) recyclate (n = 6 BSFL rearing units/group). Larval mass, mineral and nutrient concentrations and yields were determined, and the bioaccumulation factor (BAF) was calculated. The FD + SSP substrate decreased specific growth rate and crude fat of BSFL (P < 0.05) compared to FD. The FD + SSP larvae had higher Ca and P contents and yields but the BAF for Ca was lowest. The FD + BCH larvae increased Ca, iron, cadmium and lead contents compared to FD. Larvae produced on FD + SSP showed lower lead and higher arsenic concentration than on FD + BCH. Frass of FD + BCH had higher heavy metal concentration than FD + SSP and FD (P < 0.05). Except for cadmium and manganese, the larval heavy metal concentration was below the legally permitted upper concentrations for feed. In conclusion, the SSR used could enrich BSFL with Ca and P but at the expense of growth. Due to the accumulation of Cd and Mn, BSFL or products thereof can only be a component of farmed animal feed whereas in BSFL frass heavy metal concentrations remained below the upper limit authorized by EU.
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Affiliation(s)
- Mohammad M Seyedalmoosavi
- Research Institute for Farm Animal Biology (FBN), Institute of Nutritional Physiology, Dummerstorf, Germany
| | - Manfred Mielenz
- Research Institute for Farm Animal Biology (FBN), Institute of Nutritional Physiology, Dummerstorf, Germany
| | - Kai Schleifer
- Research Institute for Farm Animal Biology (FBN), Institute of Nutritional Physiology, Dummerstorf, Germany
| | - Solvig Görs
- Research Institute for Farm Animal Biology (FBN), Institute of Nutritional Physiology, Dummerstorf, Germany
| | - Petra Wolf
- University of Rostock, Nutritional Physiology and Animal Nutrition, Faculty of Agricultural and Environmental Sciences, Rostock, Germany
| | - Jens Tränckner
- University of Rostock, Water Management, Faculty of Agricultural and Environmental Sciences, Rostock, Germany
| | - Liane Hüther
- Federal Research Institute for Animal Health, Institute of Animal Nutrition, Braunschweig, Germany
| | - Sven Dänicke
- Federal Research Institute for Animal Health, Institute of Animal Nutrition, Braunschweig, Germany
| | - Gürbüz Daş
- Research Institute for Farm Animal Biology (FBN), Institute of Nutritional Physiology, Dummerstorf, Germany
| | - Cornelia C Metges
- Research Institute for Farm Animal Biology (FBN), Institute of Nutritional Physiology, Dummerstorf, Germany.
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11
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Zheng D, Wang R, Duan Y, Pang PCI, Tan T. Focus-RCNet: a lightweight recyclable waste classification algorithm based on focus and knowledge distillation. Vis Comput Ind Biomed Art 2023; 6:19. [PMID: 37819427 PMCID: PMC10567611 DOI: 10.1186/s42492-023-00146-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 09/19/2023] [Indexed: 10/13/2023] Open
Abstract
Waste pollution is a significant environmental problem worldwide. With the continuous improvement in the living standards of the population and increasing richness of the consumption structure, the amount of domestic waste generated has increased dramatically, and there is an urgent need for further treatment. The rapid development of artificial intelligence has provided an effective solution for automated waste classification. However, the high computational power and complexity of algorithms make convolutional neural networks unsuitable for real-time embedded applications. In this paper, we propose a lightweight network architecture called Focus-RCNet, designed with reference to the sandglass structure of MobileNetV2, which uses deeply separable convolution to extract features from images. The Focus module is introduced to the field of recyclable waste image classification to reduce the dimensionality of features while retaining relevant information. To make the model focus more on waste image features while keeping the number of parameters small, we introduce the SimAM attention mechanism. In addition, knowledge distillation was used to further compress the number of parameters in the model. By training and testing on the TrashNet dataset, the Focus-RCNet model not only achieved an accuracy of 92[Formula: see text] but also showed high deployment mobility.
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Affiliation(s)
- Dashun Zheng
- Faculty of Applied Sciences, Macao Polytechnic University, Rua de Luís Gonzaga Gomes, Macao, 999078, China
| | - Rongsheng Wang
- Faculty of Applied Sciences, Macao Polytechnic University, Rua de Luís Gonzaga Gomes, Macao, 999078, China
| | - Yaofei Duan
- Faculty of Applied Sciences, Macao Polytechnic University, Rua de Luís Gonzaga Gomes, Macao, 999078, China
| | - Patrick Cheong-Iao Pang
- Faculty of Applied Sciences, Macao Polytechnic University, Rua de Luís Gonzaga Gomes, Macao, 999078, China.
| | - Tao Tan
- Faculty of Applied Sciences, Macao Polytechnic University, Rua de Luís Gonzaga Gomes, Macao, 999078, China
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12
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Pazzaglia A, Gelosia M, Giannoni T, Fabbrizi G, Nicolini A, Castellani B. Wood waste valorization: Ethanol based organosolv as a promising recycling process. Waste Manag 2023; 170:75-81. [PMID: 37552928 DOI: 10.1016/j.wasman.2023.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 07/18/2023] [Accepted: 08/02/2023] [Indexed: 08/10/2023]
Abstract
Wood waste is a valuable material that could constitute an abundant and inexpensive source for the production of new materials the recovery of energy. In Europe, about 46% of wood waste is recycled to particleboard and fiberboard, while the other fraction is incinerated. However, a considerable quantity of wood waste shows potential for its transformation into value-added products due to its compositional quality. In this work, wood waste collected at a mechanical treatment plant underwent organosolv treatment to produce a cellulose pulp suitable for manufacturing containerboard. Three variables (temperature, acid concentration, and ethanol concentration) were investigated to find an optimal solution to produce wood pulp by means of Design of Experiment. Wood waste was microwave-heated at 160 °C for 15 min using an acidified ethanol-water solution (2% w/w H2SO4 and 0.8 w/w ethanol concentration), producing pulp with an average cellulose content of 76% where 93% of initial cellulose was retained. Thanks to a one-pot approach, ethanol was totally recovered, 62% of initial lignin was precipitated, and 20 g/l of hemicellulose-derived sugars solution was obtained. Finally, three wood waste samples collected in different periods of the year yielded comparable outcomes, suggesting a good reproducibility of the organosolv process. ANOVA test with a significance level of 0.01 showed a p-value of 0.029 and 0.235 for cellulose content and cellulose recovery, respectively. This study paves the way for an industrial symbiosis between recycling centers and paper mills located in the same territory.
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Affiliation(s)
- Aron Pazzaglia
- CIRIAF, Interuniversity Research Centre on Pollution and Environment "M.Felli", University of Perugia, Via G.Duranti 67, 06125 Perugia, Italy
| | - Mattia Gelosia
- CIRIAF, Interuniversity Research Centre on Pollution and Environment "M.Felli", University of Perugia, Via G.Duranti 67, 06125 Perugia, Italy
| | - Tommaso Giannoni
- CIRIAF, Interuniversity Research Centre on Pollution and Environment "M.Felli", University of Perugia, Via G.Duranti 67, 06125 Perugia, Italy
| | - Giacomo Fabbrizi
- CIRIAF, Interuniversity Research Centre on Pollution and Environment "M.Felli", University of Perugia, Via G.Duranti 67, 06125 Perugia, Italy
| | - Andrea Nicolini
- CIRIAF, Interuniversity Research Centre on Pollution and Environment "M.Felli", University of Perugia, Via G.Duranti 67, 06125 Perugia, Italy; Department of Engineering, University of Perugia, Via G.Duranti 93, 06125 Perugia, Italy
| | - Beatrice Castellani
- CIRIAF, Interuniversity Research Centre on Pollution and Environment "M.Felli", University of Perugia, Via G.Duranti 67, 06125 Perugia, Italy; Department of Engineering, University of Perugia, Via G.Duranti 93, 06125 Perugia, Italy.
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13
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Demeke ED, Desta MA, Mekonnen YS. The potential of industrial sludge and textile solid wastes for biomass briquettes with avocado peels as a binder. Environ Sci Pollut Res Int 2023; 30:86155-86164. [PMID: 37402049 DOI: 10.1007/s11356-023-28493-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 06/25/2023] [Indexed: 07/05/2023]
Abstract
Producing biomass briquettes from industrial solid wastes is a more environmentally friendly way to provide alternative energy and is essential for Ethiopia to satisfy its growing energy needs while also ensuring efficient waste management in the expansion of industrial parks. The main objective of this study is to produce biomass briquettes from a mixture of textile sludge and cotton residue using avocado peels as a binder. Textile solid waste, avocado peels, and sludge were dried, carbonized, and turned into powder to make briquettes. Briquettes made from the mixture of industrial sludge and cotton residue were combined in various ratios: 100:0, 90:10, 80:20, 70:30, 60:40, and 50:50 with the same amount of the binder. Briquettes were then made using a hand press mold followed by sun-drying for two weeks. The moisture content, calorific value, briquette density, and burning rate of biomass briquettes ranged from 5.03 to 8.04%, 11.19 to 17.2 MJ/kg, 0.21 to 0.41 g/cm3, and 2.92 to 8.75 g/min, respectively. The results revealed that the briquette produced from a 50:50 ratio of industrial sludge to cotton residue was the most efficient. The inclusion of avocado peels as a binder enhanced the briquette's binding and heating properties. Thus, the findings suggested that mixing various industrial solid wastes with fruit wastes could be an effective means of making sustainable biomass briquettes for domestic purposes. Additionally, it can also promote proper waste management and provide young people with employment prospects.
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Affiliation(s)
- Eyasu Derbew Demeke
- Center for Environmental Science, College of Natural and Computational Sciences, Addis Ababa University, P. O. Box 1176, Addis Ababa, Ethiopia
| | - Mekonnen Abebayehu Desta
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, P. O. Box 1176, Addis Ababa, Ethiopia
| | - Yedilfana Setarge Mekonnen
- Center for Environmental Science, College of Natural and Computational Sciences, Addis Ababa University, P. O. Box 1176, Addis Ababa, Ethiopia.
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14
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Liu J, Li C, Qu Y, Jia Z, Li J. Comparative life cycle assessment of the linear and circular wine industry chains: a case study in Inner Mongolia, China. Environ Sci Pollut Res Int 2023; 30:87645-87658. [PMID: 37428315 DOI: 10.1007/s11356-023-28594-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 06/30/2023] [Indexed: 07/11/2023]
Abstract
Environmental issues and the sustainability of the wine industry receive widespread public attention, but few studies address the environmental impact of the circular wine industry chain. Therefore, we applied the life cycle assessment (LCA) method to a wine enterprise in Inner Mongolia, China, to conduct a cradle-to-gate assessment and comparative analysis on the linear and circular wine industry chain scenarios. The results show that the circular industry chain (S2) has better environmental benefits; the total value of each environmental impact category of S2 is reduced by more than 80% compared with that of the linear industry chain (S1). The global warming potential of S1 is decreased from 4.88 kg CO2eq to 0.919 kg CO2eq for S2. Viticulture is the primary source of environmental problems in all life cycle stages of both scenarios, and electricity and diesel consumption are the key factors affecting the results. Our study shows that the optimization of S2 significantly improves resource efficiency and energy utilization and alleviates the environmental burden through proper waste recycling. Finally, we proposed optimization suggestions based on S2. This study provides scientific guidance for promoting the wine industry to build a circular industry chain and optimize the industrial structure, thus promoting the sustainable development of the industry.
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Affiliation(s)
- Jing Liu
- School of Ecology and Environment, Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Inner Mongolia University, Hohhot, 010020, China
- Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, Ministry of Education of China, Hohhot, 010020, China
- Collaborative Innovation Center for Grassland Ecological Security, Ministry of Education of China, Hohhot, 010020, China
| | - Chonglei Li
- School of Ecology and Environment, Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Inner Mongolia University, Hohhot, 010020, China
- Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, Ministry of Education of China, Hohhot, 010020, China
- Collaborative Innovation Center for Grassland Ecological Security, Ministry of Education of China, Hohhot, 010020, China
| | - Yuting Qu
- School of Ecology and Environment, Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Inner Mongolia University, Hohhot, 010020, China
- Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, Ministry of Education of China, Hohhot, 010020, China
- Collaborative Innovation Center for Grassland Ecological Security, Ministry of Education of China, Hohhot, 010020, China
| | - Zhibin Jia
- School of Ecology and Environment, Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Inner Mongolia University, Hohhot, 010020, China
- Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, Ministry of Education of China, Hohhot, 010020, China
- Collaborative Innovation Center for Grassland Ecological Security, Ministry of Education of China, Hohhot, 010020, China
| | - Jinhua Li
- School of Ecology and Environment, Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Inner Mongolia University, Hohhot, 010020, China.
- Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, Ministry of Education of China, Hohhot, 010020, China.
- Collaborative Innovation Center for Grassland Ecological Security, Ministry of Education of China, Hohhot, 010020, China.
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15
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Gong G, Wu B, Liu L, Li J, Zhu Q, He M, Hu G. Valorization of waste streams and C1 gases for sustainable food nutrients and value-added compounds production: Acetate as a promising intermediate. Sci Total Environ 2023:164795. [PMID: 37321491 DOI: 10.1016/j.scitotenv.2023.164795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/06/2023] [Accepted: 06/08/2023] [Indexed: 06/17/2023]
Abstract
Resource recovery from waste streams and C1 gaseous substrates (CO2, CO and CH4) are of extensive interest due to the insufficient utilization and threats to the environment. From a perspective of sustainability, valorization of waste streams and C1 gases into target energy-rich value-added products in a sustainable way offers tempting approaches for simultaneously alleviating the environmental problems and achieving a circular carbon economy, while it still suffers from the complicated compositions of feedstocks or the low solubility of gaseous feeds. Recently, a C2 feedstock-based biomanufacturing serving acetate as potential next-generation platform has received much attention, where different gaseous or cellulosic wastes are recycling into acetate and then be further processed into a wide range of valuable long-chain compounds. The different alternative waste-processing technologies that are being developed to generate acetate from various wastes or gaseous substrates are summarized, in which gas fermentation and electrochemical reduction from CO2 represent the most promising routes for achieving high acetate yield. The recent advances and innovations in metabolic engineering for acetate bio-conversion into various bioproducts ranging from food nutrients to value-added compounds were then highlighted. The challenges and promising strategies to reinforce microbial acetate conversion were also proposed, which conferred a new horizon for future food and chemical manufacturing with reduced carbon footprint.
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Affiliation(s)
- Guiping Gong
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, PR China.
| | - Bo Wu
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, PR China
| | - Linpei Liu
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, PR China
| | - Jianting Li
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, PR China
| | - Qili Zhu
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, PR China
| | - Mingxiong He
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, PR China
| | - Guoquan Hu
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, PR China
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16
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Rasmussen PU, Frederiksen MW, Carøe TK, Madsen AM. Health symptoms, inflammation, and bioaerosol exposure in workers at biowaste pretreatment plants. Waste Manag 2023; 167:173-182. [PMID: 37269581 DOI: 10.1016/j.wasman.2023.05.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/09/2023] [Accepted: 05/24/2023] [Indexed: 06/05/2023]
Abstract
Biowaste pretreatment plants have been built within the last years in Denmark in order to recycle pre-sorted biowaste from houses, restaurants, and industry. We investigated the association between exposure and health at six biowaste pretreatment plants (visited twice) across Denmark. We measured the personal bioaerosol exposure, took blood samples, and administered a questionnaire. Thirty-one persons participated, 17 of them twice, resulting in 45 bioaerosol samples, 40 blood samples, and questionnaire answers from 21 persons. We measured exposure to bacteria, fungi, dust, and endotoxin, the total inflammatory potential of the exposures, and serum levels of the inflammatory markers serum amyloid A (SAA), high sensitivity C-reactive protein (hsCRP), and human club cell protein (CC16). Higher exposures to fungi and endotoxin were found for workers with tasks inside the production area compared to workers with main tasks in the office area. A positive association was found between the concentration of anaerobic bacteria and hsCRP and SAA, whereas bacteria and endotoxin were inversely associated with hsCRP and SAA. A positive association between hsCRP and the fungal species Penicillium digitatum and P. camemberti were found, whereas an inverse association between hsCRP and Aspergillus niger and P. italicum were found. Staff with tasks inside the production area reported more symptoms of the nose than those working in the office area. To conclude, our results indicate that workers with tasks inside the production area are exposed to elevated levels of bioaerosols, and that this may affect workers' health negatively.
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Affiliation(s)
- Pil Uthaug Rasmussen
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100 Copenhagen Ø, Denmark
| | - Margit W Frederiksen
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100 Copenhagen Ø, Denmark
| | - Tanja K Carøe
- Department of Occupational and Social Medicine, Holbæk Hospital, Smedelundsgade 60, 4300 Holbæk, Denmark
| | - Anne Mette Madsen
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100 Copenhagen Ø, Denmark.
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17
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Kyu Choi M, Kang JH, Yoon YS, Yoo HM, Seok Choi H. Evaluating the recycling potential of ashes discharged from waste incineration facilities and its dependency on pretreatment efficiency in Korea. Waste Manag 2023; 167:141-149. [PMID: 37267877 DOI: 10.1016/j.wasman.2023.05.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 04/24/2023] [Accepted: 05/11/2023] [Indexed: 06/04/2023]
Abstract
The amount of incineration ash (IA) is expected to increase in South Korea from the rapidly rising numbers and operation capacities of incineration facilities; therefore, it remains necessary to establish measurements for the enhanced recycling and circularity of IA. This study established a database of hazardous substances in IA by compiling discharge data and survey results from domestic incineration facilities, along with literature survey values. The recycling potential of IA was assessed considering leaching reduction efficiency of various pretreatment methods. In particular, 98.2% of bottom ash and 49.0% of fly ash satisfied the IA recycling criteria after melting. Also, when mixed at a ratio of ∼ 78:22 natural soil to IA, the resulting material was usable for media-contact recycling by meeting the heavy metal content criteria of the Soil Environment Conservation Act.
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Affiliation(s)
- Myung Kyu Choi
- Department of Environmental Engineering, Yonsei University, Wonju, Gangwon-do 26493, South Korea
| | - Jang-Hyun Kang
- Department of Environmental Resources Research, National Institute of Environmental Research, Seogu, Incheon 22689, South Korea
| | - Young-Sam Yoon
- Department of Environmental Resources Research, National Institute of Environmental Research, Seogu, Incheon 22689, South Korea
| | - Heung-Min Yoo
- Department of Environmental Resources Research, National Institute of Environmental Research, Seogu, Incheon 22689, South Korea.
| | - Hang Seok Choi
- Department of Environmental Engineering, Yonsei University, Wonju, Gangwon-do 26493, South Korea.
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18
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Akkaya GK, Polat G, Nalçacı G, Eker YR. An economical electrocoagulation process of a hazardous anionic azo dye wastewater with the combination of recycled electrodes and solar energy. Environ Sci Pollut Res Int 2023:10.1007/s11356-023-27375-6. [PMID: 37148509 DOI: 10.1007/s11356-023-27375-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/27/2023] [Indexed: 05/08/2023]
Abstract
The energy and electrode costs are the restrictions of applying electrocoagulation (EC) in wastewater treatment and many attempts have been made to decrease these costs. In this study, an economical EC was investigated to treat a hazardous anionic azo dye wastewater (DW) that threatens the environment and human health. Firstly, an electrode for EC process was produced from recycled aluminum cans (RACs) by remelting in an induction melting furnace. The performance of the RAC electrodes in the EC was evaluated for COD, color removal, and the EC operating parameters such as initial pH, current density (CD), and electrolysis time. Response surface methodology which is based on central composite design (RSM-CCD) was used for the optimization of the process parameters which were found to be pH 3.96, CD 15 mA/cm2, and electrolysis time 45 min. The maximum COD and color removal values were determined as 98.87% and 99.07%, respectively. The characterization of electrodes and the EC sludge was conducted by XRD, SEM, and EDS analyses for the optimum variables. In addition, the corrosion test was conducted to determine the theoretical lifetime of the electrodes. The results showed that the RAC electrodes show an extended lifetime as compared to their counterparts. Secondly, the energy cost required to treat DW in the EC was aimed to decrease by using solar panels (PV), and the optimum number of PV for the EC was determined by the MATLAB/Simulink. Consequently, the EC with low treatment cost was proposed for the treatment of DW. An economical and efficient EC process for waste management and energy policies was investigated in the present study which will be instrumental in the emergence of new understandings.
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Affiliation(s)
| | - Gökhan Polat
- Metallurgical and Materials Engineering Department, Necmettin Erbakan University, Konya, Turkey
- Science and Technology Research and Application Center (BITAM), Necmettin Erbakan University, Konya, Turkey
| | - Gamze Nalçacı
- Electrical and Electronics Engineering Department, Necmettin Erbakan University, Konya, Turkey
| | - Yasin Ramazan Eker
- Metallurgical and Materials Engineering Department, Necmettin Erbakan University, Konya, Turkey
- Science and Technology Research and Application Center (BITAM), Necmettin Erbakan University, Konya, Turkey
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19
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Loganathan L, Yap SP, Lau BF, Nagapan M. Mechanical, durability, and microstructural properties of mortars containing spent mushroom substrate as partial fine aggregate replacement. Environ Sci Pollut Res Int 2023; 30:69176-69191. [PMID: 37133663 DOI: 10.1007/s11356-023-27256-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 04/23/2023] [Indexed: 05/04/2023]
Abstract
Replacing conventional fine aggregates with spent mushroom substrate (SMS) is aimed at developing a sustainable lightweight masonry mortar. It is also an alternative solution for the current improper mushroom waste disposals. Density, workability, compressive strength, specific strength, flexural strength, ultrasonic pulse velocity, water absorption, sorptivity, and equivalent CO2 emission in relation to sand reduction in mortars containing 2.5-15.0% (by volume) SMS passing through a 4.75-mm sieve were investigated. As the percentages of replacement increased from 2.5 to 15.0%, the density of the SMS mortar reduced up to 34.8%, with corresponding compressive strengths of 24.96 to 3.37 MPa. Mixes with up to 12.5% SMS met the minimum compressive and flexural strengths as stated in the ASTM C129 standard. In addition, the equivalent CO2 emission of the mixes reduced 15.09% as the SMS content increased while cost-effectiveness increases up to 98.15% until 7.5% SMS replacement. In conclusion, the use of SMS as fine aggregates up to 12.5% is a viable mix design strategy for producing sustainable lightweight mortar with a lower carbon emission.
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Affiliation(s)
- Loginy Loganathan
- Department of Civil Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Soon Poh Yap
- Department of Civil Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, Malaysia.
| | - Beng Fye Lau
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Moganraj Nagapan
- Department of Civil Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, Malaysia
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20
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Mao S, He C, Zhao Z, Wang F, Chen X, Liu X, Wang D. Lurgi-Thyssen dust catalytic thermal desorption remediation of di-(2-ethylhexyl) phthalate contaminated soils. J Environ Manage 2023; 330:117138. [PMID: 36623387 DOI: 10.1016/j.jenvman.2022.117138] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 12/18/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Fe2O3-assisted pyrolysis has been demonstrated to be a cost-effective thermal desorption (TD) technology. Lurgi-Thyssen dust (LTD) is a type of steel slag waste that contains a large amount of Fe2O3. In this study, to reduce energy consumption, LTD was added to contaminated soil to evaluate the feasibility of enhancing the TD removal efficiency of di-(2-ethylhexyl) phthalate (DEHP). The DEHP removal rate increased by 22.39% after adding 2% LTD at 200 °C for 20 min. Because of the catalytic pyrolysis of LTD, DEHP was pyrolyzed to form three types of short-chain esters: mono-(2-ethylhexyl) phthalate (MEHP), di (2-methylbutyl) ester, and methyl 2-ethylhexyl phthalate. The pyrolysis products of DEHP were less toxic and did not affect soil reuse. When the DEHP removal rate was 87.10%, LTD addition decreased the temperature and residence time of TD and alleviated the effect of TD on the soil physicochemical properties. Additionally, the desorption of DEHP from soil fitted the pseudo-second-order kinetic model well. Thus, the addition of LTD to contaminated soil enhanced the efficiency of TD remediation. Moreover, this study could provide a practical and economical strategy for LTD reuse.
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Affiliation(s)
- Shaohua Mao
- College of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Chiquan He
- College of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
| | - Zhenzhen Zhao
- College of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Feifei Wang
- College of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Xueping Chen
- College of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Xiaoyan Liu
- College of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Daoyuan Wang
- College of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
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21
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Chang CC, Kuo HW, Cheng W. Effectiveness of various cacao pod husk extraction byproducts in promoting growth and immunocompetence in Litopenaeus vannamei. Fish Shellfish Immunol 2023; 134:108632. [PMID: 36828200 DOI: 10.1016/j.fsi.2023.108632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/17/2023] [Accepted: 02/20/2023] [Indexed: 06/18/2023]
Abstract
Extracts from plant products can promote growth, can act as immunostimulants, and have antibacterial and antiparasitic properties. These extracts can be used as alternatives to the chemical treatments commonly used to prevent and control disease in aquatic species. Research on the subject has focused on identifying invasive plants or agricultural waste products that can be used as immunostimulants. The present study further identified an optimal means of extracting pectin from cacao pod husks to promote growth performance and immunocompetence in Litopenaeus vannamei that would both reduce production costs and enable waste recycling. The byproducts of pectin extraction from cacao pod husks, that is, dried cacao pod husk powder (DCP), steamed DCP (sDCP), hot water-treated cacao pod husk powder (HCP), hot water-treated cacao pod husk supernatant (HCS), and cacao pod husk pectin (CPH pectin), were used to create five experimental diets, which were administered to five groups. The control group was fed a basal diet. The growth and immunocompetence of the shrimp were determined after 30, 60, 90 and 120 days of feeding. To identify the most cost-effective means of obtaining dried cacao pod husks, this study firstly determined the costs and effectiveness of the sun-drying, dehumidification, and heated-wind drying techniques. According to the results of growth performance, the CPH pectin group had higher survival but lower weight gain than the DCP, sDCP, HCP, and HCS groups did. At 30, 60, and 90 days, the clearance efficiency of the experimental groups was higher than that of the control group. At 60 days, the experimental groups had significantly higher phagocytic activity than the control group did. However, at 30 and 90 days the HCP, HCS and CPH pectin group had higher phagocytic activity. The total hemocyte count, differential hemocyte count, phenoloxidase activity, and respiratory bursts of the CPH pectin group were higher at 30 days but the same as those of the control group at 60 and 90 days. After 120 days of feeding trial, the resistance of L. vannamei fed with diets containing byproducts of pectin extraction from cacao pod husks significantly enhanced compared to that in BD group when they were infected with Vibrio aliginolyticus for 168 h, and the related higher survival rate can be observed in HCP, HCS and CPH pectin groups. The study findings suggest that diet-administered HCP and HCS have long-term immunostimulant potential and that CPH pectin has potential in the early stages of feeding. In addition, when heated air drying was employed, a moisture level of below 10% was obtained within 12 h. The results of this study indicate that adding HCP obtained from heated air-dried cacao pod husks to the feed of L. vannamei is the most cost-effective and sustainable means of promoting long-term growth performance and immunocompetence in the species.
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Affiliation(s)
| | - Hsin-Wei Kuo
- General Research Service Center, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC
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22
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Zhang Y, Lei Y, Ma W, Ren Y. Simultaneous recycling of Si and Ti from diamond wire saw silicon powder and Ti-bearing blast furnace slag via reduction smelting: An investigation of the effects of refractories on recycling. Waste Manag 2023; 157:36-46. [PMID: 36521299 DOI: 10.1016/j.wasman.2022.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 11/23/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
The industrial wastes diamond wire saw silicon powder (DWSSP) and Ti-bearing blast furnace slag (TBFS) are important Si and Ti secondary resources, respectively. During the industrial application of recycling DWSSP and TBFS via reduction smelting, the refractories can dissolve into the molten slag, which can change the composition of the slag and influence the extraction of Si and Ti. Unfortunately, few studies on the reduction smelting of DWSSP and TBFS related to refractories have been reported, making such studies urgently needed. Therefore, the main purpose of this work was to reveal the dissolution mechanism of refractories (alumina and magnesia bricks) and the effect of refractory dissolution on Si-Ti alloy preparation. The results show that during the reduction smelting, the dissolution of alumina and magnesia bricks changed from direct dissolution into the molten slag to indirect dissolution, and the amount of magnesia bricks dissolved was less than that of aluminum bricks. Al3+ (aluminum brick) entering the slag could replace Si4+ in [SinO2n] to form [AlxSin-xO2n]x-, increasing the viscosity of the slag. The O2- (magnesia brick) entering the slag could dissociate [AlxSin-xO2n]x-, decreasing the viscosity of the slag. Therefore, compared with alumina bricks, magnesia bricks can promote slag-alloy separation and improve the extraction ratios of Ti and Si. In the case of magnesia bricks, the maximum reduction ratio of TiO2 was 98.4 %, and the maximum extraction ratio of Si was 95.8 %. This work provides essential experimental data for the Si-Ti alloys prepared via recycling DWSSP and TBFS.
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Affiliation(s)
- Yakun Zhang
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; National Engineering Research Center for Vacuum Metallurgy, Kunming 650093, China
| | - Yun Lei
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; National Engineering Research Center for Vacuum Metallurgy, Kunming 650093, China.
| | - Wenhui Ma
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; National Engineering Research Center for Vacuum Metallurgy, Kunming 650093, China; Pu'er University, Pu'er 665000, China
| | - Yongsheng Ren
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; National Engineering Research Center for Vacuum Metallurgy, Kunming 650093, China
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23
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Lee HS, Jung S, Lin KYA, Kwon EE, Lee J. Upcycling textile waste using pyrolysis process. Sci Total Environ 2023; 859:160393. [PMID: 36423842 DOI: 10.1016/j.scitotenv.2022.160393] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 11/06/2022] [Accepted: 11/17/2022] [Indexed: 06/16/2023]
Abstract
Rapidly changing fashion trends have generated tremendous amounts of textile waste globally. Textile waste is composed of a variety of substances (natural, synthetic, organic, and inorganic fibers). The inhomogeneity and complex nature of textile waste makes recycling economically challenging. Pyrolysis is a thermochemical process that transforms waste feedstocks of an inhomogeneous and complex nature into value added products (i.e., waste upcycling). This article provides a systematic review of the currently available and investigated pyrolysis processes to upcycle textile waste (e.g., material and energy recovery). The challenges in the pyrolysis process of textile waste are discussed, and relevant future research needs are recommended. Despite these challenges, pyrolysis will be an effective end-of-life option for textile waste if continuous research and development activities are conducted.
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Affiliation(s)
- Hee Sue Lee
- Department of Global Smart City, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Sungyup Jung
- Department of Environmental Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Kun-Yi Andrew Lin
- Department of Environmental Engineering & Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 402, Taiwan
| | - Eilhann E Kwon
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea.
| | - Jechan Lee
- Department of Global Smart City, Sungkyunkwan University, Suwon 16419, Republic of Korea; School of Civil, Architectural Engineering, and Landscape Architecture, Sungkyunkwan University, Suwon 16419, Republic of Korea.
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24
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Felaous K, Aziz A, Achab M. Physico-mechanical and durability properties of new eco-material based on blast furnace slag activated by Moroccan diatomite gel. Environ Sci Pollut Res Int 2023; 30:3549-3561. [PMID: 35948795 DOI: 10.1007/s11356-022-22461-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/05/2022] [Indexed: 06/15/2023]
Abstract
Natural diatomite, an amorphous siliceous rock, was used as a source of silica for the synthesis of a silicate gel to replace commercial sodium silicate gel in the synthesis of geopolymers from blast furnace slag at room temperature. Nine diatomite gels were synthesized by varying the diatomite content in the gel by 0, 10, and 15% and the NaOH molarity by 6 M, 8 M, and 10 M. The chemico-mineralogical and microstructural characterization results of the elaborated geopolymers showed that the blast furnace slag activation by diatomite gel under optimal conditions (8 M NaOH molarity and 10% diatomite) leads to a good dissolution and polycondensation of the precursor by forming amorphous gels of C-A-S-H type, as well as the mineral phase hydrotalcite, which are the same geopolymerization products detected in the case of the use of conventional silicate gel, and consequently, the obtaining of a geopolymer with interesting physical-mechanical characteristics: compressive strength of 42 MPa, density of 1. 61 g/cm3, ultrasonic pulse velocity of 3855 m/s. Thus, this new approach used in this work proved to be successful in reducing the cost and environmental impact of geopolymers.
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Affiliation(s)
- Khadija Felaous
- Geo-Biodiversity and Natural Patrimony Laboratory (GEOBIO), Scientific Institute, "Geophysics, Natural Patrimony and Green Chemistry" Research Center (GEOPAC), Mohammed V University in Rabat, Avenue Ibn Batouta, P.B. 703, 10106, Rabat-Agdal, Morocco.
| | - Ayoub Aziz
- Geo-Biodiversity and Natural Patrimony Laboratory (GEOBIO), Scientific Institute, "Geophysics, Natural Patrimony and Green Chemistry" Research Center (GEOPAC), Mohammed V University in Rabat, Avenue Ibn Batouta, P.B. 703, 10106, Rabat-Agdal, Morocco
| | - Mohammed Achab
- Geo-Biodiversity and Natural Patrimony Laboratory (GEOBIO), Scientific Institute, "Geophysics, Natural Patrimony and Green Chemistry" Research Center (GEOPAC), Mohammed V University in Rabat, Avenue Ibn Batouta, P.B. 703, 10106, Rabat-Agdal, Morocco
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25
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Kibria MG, Masuk NI, Safayet R, Nguyen HQ, Mourshed M. Plastic Waste: Challenges and Opportunities to Mitigate Pollution and Effective Management. Int J Environ Res 2023; 17:20. [PMID: 36711426 PMCID: PMC9857911 DOI: 10.1007/s41742-023-00507-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/30/2022] [Accepted: 01/02/2023] [Indexed: 05/20/2023]
Abstract
The present world is now facing the challenge of proper management and resource recovery of the enormous amount of plastic waste. Lack of technical skills for managing hazardous waste, insufficient infrastructure development for recycling and recovery, and above all, lack of awareness of the rules and regulations are the key factors behind this massive pile of plastic waste. The severity of plastic pollution exerts an adverse effect on the environment and total ecosystem. In this study, a comprehensive analysis of plastic waste generation, as well as its effect on the human being and ecological system, is discussed in terms of source identification with respect to developed and developing countries. A detailed review of the existing waste to energy and product conversion strategies is presented in this study. Moreover, this study sheds light on sustainable waste management procedures and identifies the key challenges to adopting effective measures to minimise the negative impact of plastic waste.
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Affiliation(s)
- Md. Golam Kibria
- Department of Mechanical Engineering, Rajshahi University of Engineering and Technology (RUET), Rajshahi, 6204 Bangladesh
| | - Nahid Imtiaz Masuk
- Department of Mechanical Engineering, Rajshahi University of Engineering and Technology (RUET), Rajshahi, 6204 Bangladesh
| | - Rafat Safayet
- Department of Mechanical Engineering, Rajshahi University of Engineering and Technology (RUET), Rajshahi, 6204 Bangladesh
| | - Huy Quoc Nguyen
- Faculty of Heat and Refrigeration Engineering, The University of Danang—University of Science and Technology, Danang, 550000 Vietnam
| | - Monjur Mourshed
- Department of Mechanical Engineering, Rajshahi University of Engineering and Technology (RUET), Rajshahi, 6204 Bangladesh
- Mechanical and Automotive Engineering, School of Engineering, RMIT University, Bundoora, 3083 Australia
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26
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Argentiero A, Chiarini B, Marzano E. Do social capital and the quality of institutions affect waste recycling? Waste Manag 2023; 155:240-251. [PMID: 36399851 DOI: 10.1016/j.wasman.2022.11.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 09/25/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
In a social capital framework, the quality of institutions and generalised social trust enhance attitudes towards disposal practices that are less environmentally invasive for the. This study aims to improve our empirical knowledge of this relationship through panel data models to show that waste recycling is affected by social capital and government effectiveness. The study uses Italian annual provincial data (NUTS-3 level) for 2004-2016 period to show that social capital and the quality of institutions are extremely important in determining waste recycling behavior. We find that both social capital and the quality of institutions, which act as 'substitutes for goods', increase waste recycling, although with different effects at the territorial level. In the southern and central areas, waste recycling needs to be spurred through policy interventions aimed at improving the quality of institutions, education and trust among citizens, whereas in northern Italy, social capital on its own is sufficient to enhance waste recycling. Hence, our results suggest that policies for waste recycling cannot be uncoupled from the promotion of social cohesion and institutional quality.
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Affiliation(s)
| | - Bruno Chiarini
- University of Naples Parthenope, Department of Economic and Legal Studies, Italy.
| | - Elisabetta Marzano
- University of Naples Parthenope, Department of Economic and Legal Studies, Italy; Cesifo, Germany.
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27
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Ebaid R, Wang Q, Faisal S, Li L, Abomohra A. Valorization of floral foam waste via pyrolysis optimization for enhanced phenols recovery. Chemosphere 2023; 310:136758. [PMID: 36216112 DOI: 10.1016/j.chemosphere.2022.136758] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 09/10/2022] [Accepted: 10/02/2022] [Indexed: 06/16/2023]
Abstract
Utilization of phenol formaldehyde foams is becoming increasingly widespread, especially in floral bouquets, generating toxic microplastics in the environment. The present study evaluated phenols recovery from floral foam waste (FFW) of floral bouquets through optimization of pyrolysis conditions. Compared to the biomass portion in the floral bouquet, FFW showed 55.1% higher carbon content, 56.9% lower nitrogen content, and 44.6% lower oxygen content, with the highest recorded calorific value of 27.43 MJ kg-1. Thermogravimetric analysis showed the relative thermal stability of FFW with gradual weight loss and numerous small peaks at 70 °C (representing short chain volatiles such as formaldehyde and phenol), 450 and 570 °C (due to phenolic and aromatic products release), indicating the richness of FFW with phenolic compounds. Optimization of pyrolysis conditions showed the highest significant biocrude yield of 36.0% at 700 °C for 20 min using FFW load of 2.5 g. However, optimization of phenolic production suggested 520 °C, 30 min, and 3.49 g FFW load as optimum conditions for high biocrude yield with enhanced phenolic proportion. Experimental results using the aforementioned conditions showed phenolics potential of 0.22 g phenolics/g FFW, with 78.8% phenolic compounds composed mainly of phenol and its methyl derivatives.
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Affiliation(s)
- Reham Ebaid
- Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu, 610065, China
| | - Qingyuan Wang
- Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu, 610065, China; School of Architecture and Civil Engineering, Chengdu University, Chengdu, 610106, China.
| | - Shah Faisal
- Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu, 610065, China; School of Architecture and Civil Engineering, Chengdu University, Chengdu, 610106, China
| | - Li Li
- School of Architecture and Civil Engineering, Chengdu University, Chengdu, 610106, China
| | - Abdelfatah Abomohra
- School of Architecture and Civil Engineering, Chengdu University, Chengdu, 610106, China
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28
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Xu M, Yang M, Sun H, Gao M, Wang Q, Wu C. Bioconversion of biowaste into renewable energy and resources: A sustainable strategy. Environ Res 2022; 214:113929. [PMID: 35868577 DOI: 10.1016/j.envres.2022.113929] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/07/2022] [Accepted: 07/15/2022] [Indexed: 05/27/2023]
Abstract
Due to its high amount of organic and biodegradable components that can be recycled, biowaste is not only a major cause of environmental contamination, but also a vast store of useful materials. The transformation of biowaste into energy and resources via biorefinery is an unavoidable trend, which could aid in reducing carbon emissions and alleviating the energy crisis in light of dwindling energy supplies and mounting environmental difficulties related with solid waste. In addition, the current pandemic and the difficult worldwide situation, with their effects on the economic, social, and environmental aspects of human life, have offered an opportunity to promote the transition to greener energy and sources. In this context, the current advancements and possible trends of utilizing widely available biowaste to produce key biofuels (such as biogas and biodiesel) and resources (such as organic acid, biodegradable plastic, protein product, biopesticide, bioflocculant, and compost) are studied in this review. To achieve the goal of circular bioeconomy, it is necessary to turn biowaste into high-value energy and resources utilizing biological processes. In addition, the usage of recycling technologies and the incorporation of bioconversion to enhance process performance are analyzed critically. Lastly, this work seeks to reduce a number of enduring obstacles to the recycling of biowaste for future use in the circular economy. Although it could alleviate the global energy issue, additional study, market analysis, and finance are necessary to commercialize alternative products and promote their future use. Utilization of biowaste should incorporate a comprehensive approach and a methodical style of thinking, which can facilitate product enhancement and decision optimization through multidisciplinary integration and data-driven techniques.
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Affiliation(s)
- Mingyue Xu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Min Yang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Haishu Sun
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Ming Gao
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China
| | - Qunhui Wang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China
| | - Chuanfu Wu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China.
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29
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Liu Y, Zhuge Y, Fan W, Duan W, Wang L. Recycling industrial wastes into self-healing concrete: A review. Environ Res 2022; 214:113975. [PMID: 35995228 DOI: 10.1016/j.envres.2022.113975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/18/2022] [Accepted: 07/21/2022] [Indexed: 06/15/2023]
Abstract
Self-healing concrete is an innovative construction material designed to repair its cracks autogenously or autonomously. The self-healing effect reduces the need for maintenance and increases the longevity of concrete structures, bringing environmental and economic benefits. However, the developed methods to improve self-healing performance, e.g., incorporating advanced techniques or expensive chemical healing agents, significantly increase the cost of concrete manufacture. There is worldwide interest in using waste materials to reduce the cost of self-healing concrete, and a significant amount of studies have been performed on this topic. A review of research on waste-derived self-healing concrete is presented in this paper. The wastes were used in both autogenous and autonomous self-healing approaches, such as mineral admixture, bacteria-based technology, and engineered cementitious composite; different environmental conditions may significantly influence self-healing efficiency due to different reaction mechanisms. In general, waste materials could be reused to manufacture self-healing concrete if adopting appropriate mix design and treatment methods. Self-healing concrete made with various industrial wastes is an efficient way to reduce the manufacturing cost and promote its application in practice.
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Affiliation(s)
- Yue Liu
- UniSA STEM, University of South Australia, SA, 5000, Australia
| | - Yan Zhuge
- UniSA STEM, University of South Australia, SA, 5000, Australia.
| | - Wei Fan
- UniSA STEM, University of South Australia, SA, 5000, Australia
| | - Weiwei Duan
- UniSA STEM, University of South Australia, SA, 5000, Australia
| | - Lei Wang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
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30
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Liu J, Li Z, Zhang W, Jin H, Xing F, Chen C, Tang L, Wang Y. Valorization of municipal solid waste incineration bottom ash (MSWIBA) into cold-bonded aggregates (CBAs): Feasibility and influence of curing methods. Sci Total Environ 2022; 843:157004. [PMID: 35772534 DOI: 10.1016/j.scitotenv.2022.157004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 06/11/2022] [Accepted: 06/23/2022] [Indexed: 06/15/2023]
Abstract
The municipal solid waste incineration bottom ash (MSWIBA) contains amounts of hazardous elements or composition, and its disposal to landfills may pose a serious threat to the ground water and soil. To reduce the environmental impact of MSWIBA, a novelty application into the utilization of MSWIBA for the manufacture of cold-bonded aggregates (CBAs) was investigated in this study. This study explored the impacts of curing systems on the comprehensive properties of CBAs. Furthermore, the hydrating phases of the designed CBAs were studied by X-ray diffractometer, and the micro characteristics of CBAs was analyzed by Scanning Electron Microscopy. The results show that CBAs produced from the MSWIBA had good properties with density of 1.75-1.98 g/cm3, moisture content of 0.78-16.48 %, water absorption of 3.99-14.02 % and compressive behavior of 1.6-4.8 MPa. Moreover, the heating water curing environment can significantly improve the comprehensive properties of CBAs. Specifically, the compressive strength of the CBAs under the 80 °C curing condition was increased by 74 %-113 %, and the water absorption rate was reduced by 3.4 %-8 %, compared with other curing regimes. Additionally, the XRD analysis showed that there are spinel phases in the CBAs compounds, which is beneficial to solidify the hazardous metals. Also, low-carbon CBAs also greatly reduce the amount of Cu and Pb leaching, which meets the limit requirements in the Chinese standards. Overall, application of MSWIBA as admixture in CBAs is an effective approach to recycle waste and replace natural aggregates. Meanwhile, this work can provide an insight for the production of eco-friendly LWAs.
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Affiliation(s)
- Jun Liu
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Zhenlin Li
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Weizhuo Zhang
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Hesong Jin
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China.
| | - Feng Xing
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Chaoyun Chen
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Luping Tang
- Department of Architecture and Civil Engineering, Division of Building Technology, Chalmers University of Technology, 41296 Gothenburg, Sweden
| | - Yanshuai Wang
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China
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31
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Han J, He S, Shao W, Wang C, Qiao L, Zhang J, Yang L. Municipal solid waste, an overlooked route of transmission for the severe acute respiratory syndrome coronavirus 2: a review. Environ Chem Lett 2022; 21:81-95. [PMID: 36124224 PMCID: PMC9476438 DOI: 10.1007/s10311-022-01512-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
Municipal solid waste could potentially transmit human pathogens during the collection, transport, handling, and disposal of waste. Workers and residents living in the vicinity of municipal solid waste collection or disposal sites are particularly susceptible, especially unprotected workers and waste pickers. Recent evidence suggests that municipal solid waste-mediated transmission can spread the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) to humans. Such risks, however, have received little attention from public health authorities so far and may present an under-investigated transmission route for SARS-CoV-2 and other infectious agents during pandemics. In this review, we provide a retrospective analysis of the challenges, practices, and policies on municipal solid waste management during the current pandemic, and scrutinize the recent case reports on the municipal solid waste-mediated transmission of the coronavirus disease 2019 (COVID-19). We found abrupt changes in quantity and composition of municipal solid wastes during the COVID-19. We detail pathways of exposure to SARS-CoV-2 and other pathogens carried on municipal solid wastes. We disclose evidence of pathogenic transmission by municipal solid waste to humans and animals. Assessments of current policies, gaps, and voluntary actions taken on municipal solid waste handling and disposal in the current pandemic are presented. We propose risk mitigation strategies and research priorities to alleviate the risk for humans and vectors exposed to municipal solid wastes.
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Affiliation(s)
- Jie Han
- School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Shanshan He
- School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Wenyuan Shao
- School of Life Sciences and Technology, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Chaoqi Wang
- School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Longkai Qiao
- School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Jiaqi Zhang
- School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Ling Yang
- School of Engineering and Built Environment, Griffith University, Nathan, QLD 4111 Australia
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Liu J, Fan X, Li Z, Zhang W, Jin H, Xing F, Tang L. Novel recycling application of high volume municipal solid waste incineration bottom ash (MSWIBA) into sustainable concrete. Sci Total Environ 2022; 838:156124. [PMID: 35605859 DOI: 10.1016/j.scitotenv.2022.156124] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 05/02/2022] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
Since municipal solid waste incineration bottom ash (MSWIBA) contains some heavy metals that are harmful to the groundwater and soil, this study proposes an effective and new approach to deal with high-volume MSWIBA. Selecting 70% MSWIBA, 10% ordinary Portland cement (OPC), 10% fly ash/ground granulated blast furnace slag (FA/GGBFS), and 1% volume of polypropylene (PP) fiber as the raw materials, this project designed and manufactured cold-bonded fiber aggregates (CBFAs) and applied them into sustainable concrete. It was found that the water absorption of CBFAs was between 12 and 14%, the bulk density was between 900 and 1100 kg/m3, and the compressive strength of single particle was greater than 1.8 MPa. And it was found that the mechanical strength and bulk density of CBFAs were positively correlated, while the mechanical strength and water absorption were negatively correlated. The leaching behaviors of CBFAs on Cu, Pb, Cd, and Cr were successfully suppressed to less than 1% of that originally from MSWIBA, which can be in line with the Chinese standards. Additionally, it is also found that the green concrete with adding GGBFS-CBFAs has higher overall fluidity and better mechanical properties than the concrete with FA-CBFAs. The mechanical properties of concrete were the best under the replacement rate of 60% of CFBAs, and the strength of green concrete added with GGBFS-CBFAs reached 96% of that of ordinary concrete. In this study, the rapid chloride ion penetration test, mercury intrusion and electron microscope tests found that the bonding effect between the CBFAs and the green concrete matrix was better, and the pore structure in the transition zone of the surrounding interface was refined. The proportion of transition pores in the pore structure was up to 59%. This shows that the concrete added with CBFAs has better resistance to chloride ion diffusion, and has some improvement on the durability. This research suggests that CBFAs including high volume MSWIBA has the potential to be successfully applied as the alternative to natural aggregates in sustainable concrete, and this can also advance waste recycling, and solidify high volume heavy metals in infrastructures.
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Affiliation(s)
- Jun Liu
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Xu Fan
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China.
| | - Zhenlin Li
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Weizhuo Zhang
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Hesong Jin
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China.
| | - Feng Xing
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Luping Tang
- Department of Architecture and Civil Engineering, Division of Building Technology, Chalmers University of Technology, 41296 Gothenburg, Sweden
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Attique S, Batool M, Goerke O, Abbas G, Saeed FA, Din MI, Jalees I, Irfan A, Gregory DH, Tufail Shah A. Fe-POM/attapulgite composite materials: Efficient catalysts for plastic pyrolysis. Waste Manag Res 2022; 40:1433-1439. [PMID: 35243944 DOI: 10.1177/0734242x221080084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This article describes the catalytic cracking of low-density polyethylene over attapulgite clay and iron substituted tungstophosphate/attapulgite clay (Fe-POM/attapulgite) composite materials to evaluate their suitability and performance for recycling of plastic waste into liquid fuel. The prepared catalysts enhanced the yield of liquid fuel (hydrocarbons) produced in cracking process. A maximum yield of 82% liquid oil fraction with a negligible amount of coke was obtained for 50% Fe-POM/attapulgite composite. Whereas, only 68% liquid oil fractions with a large amount of solid black residue was produced in case of non-catalytic pyrolysis. Moreover, Fe-POM/attapulgite clay composites showed higher selectivity towards lower hydrocarbons (C5-C12) with aliphatic hydrocarbons as major fractions. These synthesised composite catalysts significantly lowered the pyrolysis temperature from 375°C to 310°C. Hence, recovery of valuable fuel oil from polyethylene using these synthesised catalysts suggested their applicability for energy production from plastic waste at industrial level as well as for effective environment pollution control.
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Affiliation(s)
- Saira Attique
- Institute of Chemistry, University of the Punjab, New Campus, Lahore, Pakistan
| | - Madeeha Batool
- Institute of Chemistry, University of the Punjab, New Campus, Lahore, Pakistan
| | - Oliver Goerke
- Faculty III Process Sciences, Institute of Materials Science and Technology, Fachgebiet Keramische Werkstoffe, Technische Universität Berlin / Chair of Advanced Ceramic Materials, Berlin, Germany
| | - Ghayoor Abbas
- Faculty of Pharmacy and Alternative Medicine, Islamia University Bahawalpur, Bahawalpur, Pakistan
| | | | - Muhammad Imran Din
- Institute of Chemistry, University of the Punjab, New Campus, Lahore, Pakistan
| | - Irfan Jalees
- Institute of Environmental Engineering and Research, University of Engineering and Technology, Lahore, Pakistan
| | - Ahmad Irfan
- Department of Chemistry, College of Science, King Khalid University, Abha, Saudi Arabia
| | - Duncan H Gregory
- WestCHEM, School of Chemistry, University of Glasgow, Glasgow, UK
| | - Asma Tufail Shah
- Faculty III Process Sciences, Institute of Materials Science and Technology, Fachgebiet Keramische Werkstoffe, Technische Universität Berlin / Chair of Advanced Ceramic Materials, Berlin, Germany
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
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Zhang J, Xu Q, Wang H, Li S. Preparation of hydrothermally solidified materials from waste cathode ray tube panel glass for construction applications. Environ Sci Pollut Res Int 2022; 29:57516-57522. [PMID: 35355179 DOI: 10.1007/s11356-022-19920-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 03/22/2022] [Indexed: 06/14/2023]
Abstract
Solidification of cathode ray tube (CRT) panel glass was carried out using a hydrothermal processing method. In this way, the glass powder was first compacted in a mold at 20 MPa, and then hydrothermally cured in an autoclave under saturated steam pressure at 200 ℃ for 6 h. The CRT panel glass was then hydrothermally solidified by the formation of tobermorite (Ca5Si6O16(OH)2·4H2O), which was encouraged by the addition of slaked lime (Ca(OH)2). The strength of solidified specimen heavily depended on the amount of tobermorite formed, with higher concentrations of tobermorite producing commensurately greater mechanical strength. With the addition of Ca(OH)2 at 20-30% by mass, the specimen achieved a bending strength of approximately 16 MPa, which was sufficiently great for using as a construction material. As such, there is cause to believe that the hydrothermal processing method used here may have great potential for resource utilization of CRT panel glass, and the performance of the product is suitable for use as building materials.
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Affiliation(s)
- Jing Zhang
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450000, China
| | - Qingbo Xu
- Solid Waste Management Center, Sanmenxia Ecological and Environmental Protection Bureau, Sanmenxia, 472000, China
| | - Haiyang Wang
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450000, China
| | - Shunyi Li
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450000, China.
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Wei Y, Liu S, Yao R, Chen S, Gao J, Shimaoka T. Removal of harmful components from MSWI fly ash as a pretreatment approach to enhance waste recycling. Waste Manag 2022; 150:110-121. [PMID: 35810727 DOI: 10.1016/j.wasman.2022.06.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 06/22/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Municipal solid waste incineration (MSWI) fly ash contains many harmful components that may limit its potential for recycling. An effective pretreatment is therefore required before any recycling can be implemented. In this study, the effects of four pretreatment methods (water washing, CO2-aided washing, CO32--aided washing, and CO2 and CO32--aided washing) on the extraction behavior of chloride, sulfate, and heavy metals were evaluated. Water washing was found to be effective for the extraction of all easily and moderately soluble Cl-bearing salts, achieving Cl extraction ratios of 88%, 90%, and 96% for ash from Chongqing (CQ), Qingdao (QD), and Tianjin (TJ), respectively. Injection of CO2 during washing facilitated decomposition of the hardly soluble Cl-bearing salts, increasing the Cl extraction efficiency by 6% for CQ ash and 9% for QD ash. However, for the TJ ash that contained few insoluble Cl-bearing minerals, CO2 injection decreased the Cl extraction rate. The addition of CO32- had a negative influence on Cl extraction for all ashes, but it slightly promoted sulfate extraction. Despite the high Cl removal rate, only 23-37% of the sulfate and 0.1-12% of heavy metals were removed. Overall, water-based pretreatment, especially CO2-aided washing, significantly altered the physical, chemical, and mineralogical characteristics of the fly ash, making it more suitable for recycling. Consequently, the blending ratio of the fly ash for cement clinker manufacture increased from 0.2 to 0.3% in the raw ash to 3.5-5.5% in the treated ash, enabling the extensive use of ash materials.
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Affiliation(s)
- Yunmei Wei
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400045, PR China.
| | - Sijie Liu
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400045, PR China
| | - Ruixuan Yao
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400045, PR China
| | - Shuang Chen
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400045, PR China
| | - Junmin Gao
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400045, PR China
| | - Takayuki Shimaoka
- Department of Urban and Environmental Engineering, School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Japan
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Cardoso PHS, Gonçalves PWB, Alves GDO, Pegoraro RF, Fernandes LA, Frazão LA, Sampaio RA. Improving the quality of organic compost of sewage sludge using grass cultivation followed by composting. J Environ Manage 2022; 314:115076. [PMID: 35447451 DOI: 10.1016/j.jenvman.2022.115076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 03/24/2022] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
Composting is one of the main processes of stabilization of sewage sludge and its association with cultivation in this residue has a great potential to produce stabilized organic fertilizer and, or substrate for plant development. The aim of this work was to evaluate the physical, chemical, and microbial attributes of sewage sludge (SS) aerated and cultivated with Pennisetum purpureum or Urochloa brizantha and, later, composted. The study was installed in a 2x2+2 factorial scheme, with four replications. The factors consisted of cultivation of P. purpureum or U. brizantha in SS for 90 days, with or without intermittent aeration for 60 days. The control treatments were SS without cultivation, with the presence or absence of aeration. After 90 days of cultivation, the grass was cut, crushed, and incorporated into the SS for composting for 60 days. The composted sewage sludge showed an increase of 26, 24, 17, 123, 19, 32, and 7.7% in the levels of P, Ca, Cu, Fe, Mn, Zn, and Pb; and a reduction of 22, 5.2, 26, 30, 8.8, and 70% in the levels of C, N, K, Mg, Ni, and Na, respectively. The levels of Cu, Ni, Zn, and Pb remained below the maximum limit allowed by environmental resolution. The degradation of SS decreased the particle diameter, increasing the bulk density and total porosity, improving the physical properties of the compost. The SS cultivation and composting, regardless of the grass, led to a reduction in pH, basal and accumulated respiration, nitrification index, and C/N ratio and an increase in the CEC/C ratio, showing adequate maturation of the compost produced. Thus, the SS cultivation and composting with grasses were effective for producing matured and quality organic compost with low risk of environmental contamination.
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Affiliation(s)
- Paulo Henrique Silveira Cardoso
- Center of Nuclear Energy in Agriculture, Universidade de São Paulo (USP), Av. Centenário, 303, Piracicaba, SP 13416-000, Brazil.
| | - Paula Wellen Barbosa Gonçalves
- School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Path of Access Prof. Paulo Donato Castellane, Km 5, Jaboticabal, SP 14884-900, Brazil
| | - Gustavo de Oliveira Alves
- Institute of Agrarian Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Universitária, 1000, Montes Claros, MG 39400-090, Brazil
| | - Rodinei Facco Pegoraro
- Institute of Agrarian Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Universitária, 1000, Montes Claros, MG 39400-090, Brazil
| | - Luiz Arnaldo Fernandes
- Institute of Agrarian Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Universitária, 1000, Montes Claros, MG 39400-090, Brazil
| | - Leidivan Almeida Frazão
- Institute of Agrarian Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Universitária, 1000, Montes Claros, MG 39400-090, Brazil
| | - Regynaldo Arruda Sampaio
- Institute of Agrarian Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Universitária, 1000, Montes Claros, MG 39400-090, Brazil
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Sio JEL, Escobar EC, Kim H, Chung WJ, Nisola GM. Hydroxypicolinic acid tethered on magnetite core-silica shell (HPCA@SiO 2@Fe 3O 4) as an effective and reusable adsorbent for practical Co(II) recovery. Chemosphere 2022; 298:134301. [PMID: 35288181 DOI: 10.1016/j.chemosphere.2022.134301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 03/05/2022] [Accepted: 03/09/2022] [Indexed: 06/14/2023]
Abstract
The soaring demand and future supply risk for cobalt (Co) necessitate more efficient adsorbents for its recycling from electronic wastes, as a cheaper and less hazardous option for its production. Herein, a magnetic adsorbent covalently tethered with 5-hydroxypicolinic acid (HPCA) as Co(II) ligand was developed. The magnetic component (Fe3O4) was protected with silica (SiO2), then silanized with chloroalkyl linker and subsequently functionalized with HPCA via SN2 nucleophilic substitution (HPCA@SiO2@Fe3O4). Results from FTIR, TGA, EA, and XPS confirm the successful adsorbent preparation with high HPCA loading of 2.62 mmol g-1. TEM-EDS reveal its imperfect spherical morphology with ligands well-distributed on its surface. HPCA@SiO2@Fe3O4 is hydrophilic, water-dispersible and magnetically retrievable, which is highly convenient for its recovery. The Co(II) capture on HPCA@SiO2@Fe3O4 involves monodentate coordination with carboxylate (COO-) and lone pair acceptance from pyridine (aromatic -N = ) moiety of HPCA, with minor interaction from acidic silanols (Si-O-). The binding occurs at 2 HPCA: 1 Co(II) ratio, that follows the Sips isotherm model with competitive Qmax = 92.35 mg g-1 and pseudo-second order kinetics (k2 = 0.0042 g mg-1 min-1). In a simulated LIB liquid waste, HPCA@SiO2@Fe3O4 preferentially captures Co(II) over Li(I) with αLi(I)Co(II)=166 and Mn(II) with αMn(II)Co(II)=55, which highlights the importance of HPCA for Co(II) recovery. Silica protection of Fe3O4 rendered the adsorbent chemically stable in acidic thiourea solution for its regeneration by preventing the deterioration of the magnetic component. Covalent functionalization averted ligand loss, which allowed HPCA@SiO2@Fe3O4 to deliver consistent and reversible adsorption/desorption performance. Overall results demonstrate the potential of HPCA@SiO2@Fe3O4 as a competitive and practical adsorbent for Co(II) recovery in liquid waste sources.
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Affiliation(s)
- John Edward L Sio
- Environmental Waste Recycle Institute (EWRI), Department of Energy Science and Technology (DEST), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin-si, Gyeonggi-do, 17058, South Korea
| | - Erwin C Escobar
- Environmental Waste Recycle Institute (EWRI), Department of Energy Science and Technology (DEST), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin-si, Gyeonggi-do, 17058, South Korea; Department of Engineering Science, College of Engineering and Agro-Industrial Technology, University of the Philippines Los Baños, College Laguna, 4031, Philippines
| | - Hern Kim
- Environmental Waste Recycle Institute (EWRI), Department of Energy Science and Technology (DEST), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin-si, Gyeonggi-do, 17058, South Korea
| | - Wook-Jin Chung
- Environmental Waste Recycle Institute (EWRI), Department of Energy Science and Technology (DEST), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin-si, Gyeonggi-do, 17058, South Korea.
| | - Grace M Nisola
- Environmental Waste Recycle Institute (EWRI), Department of Energy Science and Technology (DEST), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin-si, Gyeonggi-do, 17058, South Korea.
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Akinwande AA, Balogun OA, Romanovski V, Danso H, Kamarou M, Ademati AO. Mechanical performance and Taguchi optimization of kenaf fiber/cement-paperboard composite for interior application. Environ Sci Pollut Res Int 2022; 29:52675-52688. [PMID: 35267166 DOI: 10.1007/s11356-022-19449-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 02/22/2022] [Indexed: 06/14/2023]
Abstract
Demand for particleboards keeps increasing and as such more trees are fell for its production, engendering deforestation. For the purpose of reducing falling of trees, this study, focused on recycling of waste paper in the development of paperboard as alternative to particleboards used for furniture and interior household applications. Kenaf fiber (KF) was blended at varying proportions of 0, 1, 2, 3, 4, and 5 wt.% with 20 wt.% constant cement and 20 wt.% constant coconut shell powder while the remaining was paper pulp. Board specimen developed were cured for 14, 28, and 90 days and mechanical properties were examined. Results obtained showed that fiber dosage improved bond strength and screw holding strengths as compared with the control mix. Similarly, modulus of rupture was enhanced with KF loading as compared with control mix while 1 to 3 wt.% KF spawned enhancement of modulus of elasticity. However, 4 and 5 wt.% KF led to a reduction in the modulus. Infusion of the fiber enhanced tensile strength from 1 to 3 wt.% content. 14-day and 28-day curing periods were observed to improve properties while the 90-day curing period is detrimental to all properties. Optimization via signal-to-noise ratio revealed an optimum mix of 2 wt.% obtained for fiber and an optimum curing duration of 28 days.
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Affiliation(s)
- Abayomi Adewale Akinwande
- Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure, Ondo State, Nigeria.
| | - Oluwatosin Abiodun Balogun
- Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure, Ondo State, Nigeria
| | - Valentin Romanovski
- Center of Functional Nano-Ceramics, National University of Science and Technology "MISIS", Lenin av., 4, 119049, Moscow, Russia
- Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA, 22904, USA
| | - Humphrey Danso
- Department of Construction and Wood Technology, Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development, Kumasi, Ghana
| | - Maksim Kamarou
- Department of Chemical Technology of Binding Materials, Belarusian State Technological University, Sverdlova, 13a, 220006, Minsk, Belarus
| | - Akeem Oladele Ademati
- Department of Agricultural and Resource Economics, Federal University of Technology, Akure, Ondo State, Nigeria
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Lu B, Wang J. How can residents be motivated to participate in waste recycling? An analysis based on two survey experiments in China. Waste Manag 2022; 143:206-214. [PMID: 35276504 DOI: 10.1016/j.wasman.2022.02.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 02/14/2022] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
Waste recycling constitutes an important part of sustainable municipal eco-management, but the chronic and enduring problem in China is how to motivate residents to participate. Although previous research has found that persuasive incentives can exert a powerful influence on people's pro-environmental behavior, little work placed much emphasis on the effect of various incentives and make a comparison. The moderating role of social norms in indigenous scene is also ignored. The present research attempts to tackle this issue to explore theoretically the black box of China's policy implementation. We conducted two survey experiments online in China from February 28 to April 25, 2021. The results in experiment 1 show that four incentives significantly affect respondents' disposition toward recycling behavior, of which monetary incentive is the most effective strategy and the order of the rest incentives is environmental framing incentive, institutional incentive and moral incentive according to the effect calculated by the model. Furthermore, experiment 2 finds that social norms positively moderate the nexus between incentives and recycling behavior, and descriptive norms play a more significant role than injunctive norms. Finally, implications for public policy and limitations are discussed.
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Affiliation(s)
- Bin Lu
- School of Public Administration, Nanjing Audit University, Nanjing 211815, China
| | - Jie Wang
- School of Business, Yangzhou University, Yangzhou 225127, China; Research Center for Government Governance and Public Policy, Yangzhou University, Yangzhou 225127, China
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40
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Zhang Y, Lei Y, Ma W, Zhai C, Shi Z, Ren Y. A novel approach for simultaneous recycling of Ti-bearing blast furnace slag, diamond wire saw Si powder, and Al alloy scrap for preparing TiSi 2 and Al-Si alloys. J Hazard Mater 2022; 427:127905. [PMID: 34862105 DOI: 10.1016/j.jhazmat.2021.127905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 11/17/2021] [Accepted: 11/22/2021] [Indexed: 06/13/2023]
Abstract
Large amounts of Ti-bearing blast furnace slag (TBFS), diamond wire saw Si powder (DWSSP), and Al alloy scrap (AAS) are generated annually. Although these are industrial waste, they contain valuable Ti, Si, and Al resources. In this work, a novel process is developed for the simultaneous recycling of Ti, Si, and Al from these three wastes to prepare TiSi2 and Al-Si alloys. TBFS, DWSSP, and CaO (flux) were mixed to form a mixed Ti-Si-slag, which was combined with AAS and underwent reduction smelting at 1823 K to prepare Si-Ti-Al alloys. Subsequently, TiSi2 (98.7%) and low-Fe Al-Si (0.64 wt% Fe) alloys were prepared sequentially by separating the molten Si-Ti-Al melt via electromagnetic directional crystallization with a pull-down rate of 3 µm/s. The impurities in the Si-Ti-Al alloy were removed during the separation process by segregation at the boundary of the solid-liquid phase and volatilization. Furthermore, the entire process produces no waste acid or waste gas. Therefore, this work has introduced an efficient and environmentally friendly method for the value-added recycling of Ti, Si, and Al resources from accumulated TBFS, DWSSP, and AAS.
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Affiliation(s)
- Yakun Zhang
- National Engineering Laboratory for Vacuum Metallurgy/Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Yun Lei
- National Engineering Laboratory for Vacuum Metallurgy/Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China.
| | - Wenhui Ma
- National Engineering Laboratory for Vacuum Metallurgy/Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China.
| | - Chaoran Zhai
- National Engineering Laboratory for Vacuum Metallurgy/Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Zhe Shi
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China; Key Laboratory of Complex Iron Resources for Clean Metallurgy, Education Department of Yunnan Provincial, Kunming 650093, China
| | - Yongsheng Ren
- National Engineering Laboratory for Vacuum Metallurgy/Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
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Saha JK, Coumar MV. Alteration of contamination threat due to dilution effect on metal concentration in maize-wheat biomass on sludge amended clayey soil. Environ Monit Assess 2022; 194:273. [PMID: 35278144 DOI: 10.1007/s10661-022-09923-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 03/05/2022] [Indexed: 06/14/2023]
Abstract
Industrial sludge often contains considerable amount of organic matter and plant nutrients to enhance crop production. However, its utilization in agriculture is viewed with concern as it also enhances the entry of toxic heavy metals into the agroecosystem. A field study was conducted to assess the potential of sludge generated from a soft beverage industry in cereal crops after critical analysis of benefits and contamination risks. The treatments were control, recommended doses of major fertilizers applied to both maize and following wheat crops, and organic amendments, viz., cattle dung manure and sludge at graded rates (2-50 t/ha) applied only to maize crop. Growth, yield, and heavy metal concentrations in plant parts were measured. Sludge application rates at ≥ 20 t/ha had significant direct as well as residual effects on crops in terms of enhancing their growth parameters and grain yields in comparison to the direct effects of fertilizer applications. It also enhanced Cu, Cd, Pb, and Zn concentrations in vegetative biomass of both crops even with the lowest rate of application, but had lower or little effect on their concentrations in grains. Sludge facilitated accumulation of metals in vegetative biomass of maize as indicated by increase in dynamic factor of bioaccumulation (BAdyn) to > 1. Relative uptake of added metals by maize biomass increased with increasing sludge rate up to 10 t/ha, but decreased significantly at the highest application rate. Heavy metals concentration in biomass due to increasing rates of sludge application was the result of a trade-off between their "increasing entry in soil-plant system" and "dilution in biomass" due to enhanced crop growth. Strategy for safe application of this contaminated sludge in agroecosystem was discussed through analysis of heavy metals transfer characteristics in soil-plant system. The study indicates that conjoint application of lower rates of both sludge and N fertilizer can minimize risk of heavy metals contamination while ensuring higher crop yields.
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Affiliation(s)
- Jayanta Kumar Saha
- Division of Environmental Soil Science, ICAR-Indian Institute of Soil Science, Bhopal (M.P.), India.
| | - M Vassanda Coumar
- Division of Environmental Soil Science, ICAR-Indian Institute of Soil Science, Bhopal (M.P.), India
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Dong Z, Chen J, Lu W. Computer vision to recognize construction waste compositions: A novel boundary-aware transformer (BAT) model. J Environ Manage 2022; 305:114405. [PMID: 34995944 DOI: 10.1016/j.jenvman.2021.114405] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 12/21/2021] [Accepted: 12/27/2021] [Indexed: 06/14/2023]
Abstract
Recognition of construction waste compositions using computer vision (CV) is increasingly explored to enable its subsequent management, e.g., determining chargeable levy at disposal facilities or waste sorting using robot arms. However, the applicability of existing CV-enabled construction waste recognition in real-life scenarios is limited by their relatively low accuracy, characterized by a failure to distinguish boundaries among different waste materials. This paper aims to propose a novel boundary-aware Transformer (BAT) model for fine-grained composition recognition of construction waste mixtures. First, a pre-processing workflow is devised to separate the hard-to-recognize edges from the background. Second, a Transformer structure with a self-designed cascade decoder is developed to segment different waste materials from construction waste mixtures. Finally, a learning-enabled edge refinement scheme is used to fine-tune the ignored boundaries, further boosting the segmentation precision. The performance of the BAT model was evaluated on a benchmark dataset comprising nine types of materials in a cluttered and mixture state. It recorded a 5.48% improvement of MIoU (mean intersection over union) and 3.65% of MAcc (Mean Accuracy) against the baseline. The research contributes to the body of interdisciplinary knowledge by presenting a novel deep learning model for construction waste material semantic segmentation. It can also expedite the applications of CV in construction waste management to achieve a circular economy.
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Affiliation(s)
- Zhiming Dong
- Department of Real Estate and Construction, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
| | - Junjie Chen
- Department of Real Estate and Construction, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
| | - Weisheng Lu
- Department of Real Estate and Construction, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
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Zhou Y, Cai G, Cheeseman C, Li J, Poon CS. Sewage sludge ash-incorporated stabilisation/solidification for recycling and remediation of marine sediments. J Environ Manage 2022; 301:113877. [PMID: 34626945 DOI: 10.1016/j.jenvman.2021.113877] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/10/2021] [Accepted: 09/27/2021] [Indexed: 06/13/2023]
Abstract
Finding suitable disposal sites for dredged marine sediments and incinerated sewage sludge ash (ISSA) is a challenge. Stabilisation/solidification (S/S) has become an increasingly popular remediation technology. This study sheds light on the possible beneficial use of ISSA together with traditional binders to stabilise/solidify marine sediments. The performance of the binders on S/S of sediment 1 (clean) and sediment 2 (contaminated) was also compared. The results showed that the use of ISSA as part of the binder was effective in promoting the strength of the sediment with a high initial moisture content due to ISSA porous and high water absorption characteristics. The sediments treated with 10% cement and 20% ISSA attained the highest strength. Also, cement hydration as well as pozzolanic reactions between ISSA and Ca(OH)2 made contributions to the strength development. This was supported by the microstructural analysis, in particular the porosity results. In terms of environmental impacts, two leaching tests (toxicity characteristic leaching procedure and synthetic precipitation leaching procedure) found that all the S/S treated sediment by 10% lime and 20% ISSA resulted in the lowest leachate concentrations under the on-site reuse scenario or under simulative acidic rainfall conditions. Therefore, recycling waste ISSA with lime can be used as an appealing binder to replace cement to stabilise/solidify dredged marine sediments for producing fill materials.
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Affiliation(s)
- Yifan Zhou
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
| | - Guanghua Cai
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; College of Civil Engineering, Nanjing Forestry University, No. 159, Longpan Road, Nanjing, 210037, PR China.
| | - Chris Cheeseman
- Department of Civil and Environmental Engineering, Imperial College London, South Kensington, London, SW7 2BU, UK.
| | - Jiangshan Li
- State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Hung Hom, Kowloon, Hong Kong.
| | - Chi Sun Poon
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Hung Hom, Kowloon, Hong Kong.
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Xin L, Yan X, Xu X, Qin Y, Nan Q, Wang H, Wu W. Carbohydrate degradation contributes to the main bioheat generation during kitchen waste biodrying process: A pilot study. Waste Manag 2022; 137:20-30. [PMID: 34717116 DOI: 10.1016/j.wasman.2021.10.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 09/18/2021] [Accepted: 10/14/2021] [Indexed: 06/13/2023]
Abstract
Biodrying is a promising method for processing kitchen waste (KW) with high moisture content into reusable solid recovered fuels (SRFs). During biodrying, a large amount of bioheat generated from biodegradation of biochemical components results in KW dehydration. However, the degradation rules of these components and their contribution to the bioheat in KW biodrying have not been systematically clarified. Here, a pilot experiment was performed to investigate the variations in biochemical components, hydrolase activities, and bioheat generation during three successive cycles of biodrying processes. Results showed that KW could be rapidly converted into SRFs with low calorific values of 6705-7062 kJ/kg and moisture content of 31.26%-35.21%. Analyses of hydrolase activities and mean fluorescence intensity suggested that the biodrying process pioneered the degradation of lipids and proteins in the warming stages, while carbohydrates (i.e. amylum, celluloses, etc.) underwent rapid decomposition in a large extent in the high-temperature and cooling stages. Carbohydrates with minimal difficulty in degradation, contributed 73.37%-89.92% to the total degradation mass and 59.23%-60.80% to the bioheat source during the three-cycle biodrying process. The generated bioheat was 4.32-4.56 times the amount of the theoretical heat used for water removal, indicating that internal bioheat could significantly enhance water evaporation and was sufficient for the expected water removal mass. Therefore, the evaluation of the main components to bioheat generation and its utilization efficiency makes a prominent contribution that can greatly clarify the conversion of KW biodrying into SRFs in order to efficiently promote renewable bioenergy and support the bioeconomy.
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Affiliation(s)
- Liqing Xin
- Institute of Environment Science and Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Zhejiang 310058, PR China
| | - Xiangrui Yan
- Institute of Environment Science and Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Zhejiang 310058, PR China
| | - Xingkun Xu
- Institute of Environment Science and Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Zhejiang 310058, PR China
| | - Yong Qin
- Institute of Environment Science and Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Zhejiang 310058, PR China
| | - Qiong Nan
- Institute of Environment Science and Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Zhejiang 310058, PR China
| | - Haoshu Wang
- Institute of Environment Science and Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Zhejiang 310058, PR China; Zhejiang Transper Environmental Protection Technology Co., Ltd, Hangzhou 310058, PR China
| | - Weixiang Wu
- Institute of Environment Science and Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Zhejiang 310058, PR China.
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Almutairi AW, Al-Hasawi ZM, Abomohra AEF. Valorization of lipidic food waste for enhanced biodiesel recovery through two-step conversion: A novel microalgae-integrated approach. Bioresour Technol 2021; 342:125966. [PMID: 34562712 DOI: 10.1016/j.biortech.2021.125966] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/12/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
The present study designed an innovative route for two-step biodiesel recovery from lipidic food waste followed by microalgae cultivation. Optimization of oil conversion showed the highest fatty acid methyl esters (FAMEs) recovery of 92.6% (lipid basis). Microalgal lipid accumulation enhanced by the increased lipid-free waste hydrolysate ratio in the medium, where the maximum lipid content of 26.2 dw% was recorded using 50% hydrolysate. Application of 30% hydrolysate ratio resulted in the maximum recorded lipid productivity, which was 99.4% higher than that of the control and insignificant with 40% hydrolysate. Waste oil-derived FAMEs showed 69.0% higher saturated fatty acids (SFAs) proportion than that of algal lipids. In contrast, the highest polyunsaturated fatty acids (PUFAs) proportion (48.8% of total fatty acids) was recorded in microalgal lipids. The study concluded that mixing microalgal lipids with waste oil (1:1, w/w) provides a desirable practical route for enhanced biodiesel production complying with the international standards.
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Affiliation(s)
- Adel W Almutairi
- Biological Sciences Department, Faculty of Science & Arts, King Abdulaziz University, Rabigh, Saudi Arabia.
| | - Zaki M Al-Hasawi
- Biological Sciences Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abd El-Fatah Abomohra
- New Energy and Environmental Laboratory (NEEL), School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, PR China; Botany and Microbiology Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
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Kuo HW, Chang CC, Cheng W. Synbiotic combination of prebiotic, cacao pod husk pectin and probiotic, Lactobacillus plantarum, improve the immunocompetence and growth of Litopenaeus vannamei. Fish Shellfish Immunol 2021; 118:333-342. [PMID: 34562581 DOI: 10.1016/j.fsi.2021.09.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/14/2021] [Accepted: 09/20/2021] [Indexed: 06/13/2023]
Abstract
To reach the sustainable development goals on waste recycling, cacao pod husk (CPH), produced as an agricultural waste byproduct during the cacao bean processing was applied to manufacture CPH pectin for developing the potential for diverse application in aquaculture, minimizing CPH impact to the environment and bringing benefits to the agriculture and aquaculture industries. In this study, CPH pectin (5 g/kg diet) and Lactobacillus plantarum (LP; 1010 cfu/kg diet) were separately introduced to the diets of Litopenaeus vannamei for a 56-day feeding trial, and two synbiotic combinations of CPH pectin and LP (CPH pectin at 5 g/kg diet + LP at 107 cfu/kg diet or at 1010 cfu/kg diet) were also conducted. After the 56-day feeding trial, significantly elevated percent weight gain, percent length gains and feeding efficiency in L. vannamei were only observed in synbiotic combination of CPH pectin at 5 g/kg diet and LP at 107 cfu/kg diet treatment, and the remainder of the treatments remained consistently similar to the control. Significantly increases in total haemocyte count, granular cells, phenoloxidase activity, and respiratory bursts were observed in L. vannamei fed with synbiotics at 7-28 days of feeding, accompanied by significant promotion of phagocytic activity and clearance efficiency in response to V. alginolyticus challenge during 56 days of feeding trial. Furthermore, at the end of the 56 days of feeding trial, shrimp receiving CPH pectin and/or LP treatments showed a significantly higher survival ratio against V. alginolyticus infection and hypothermal stress. It was therefore concluded that CPH pectin or LP was confirmed as an immunostimulant for L. vannamei to trigger immunocompetence through oral administration without negative effects within 56 days of feeding trial, and the synbiotic combination of CPH pectin and LP exhibited complementary and synergistic effects on growth performance and immunocompetence in L. vannamei.
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Affiliation(s)
- Hsin-Wei Kuo
- General Research Service Center, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC
| | - Chin-Chyuan Chang
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC
| | - Winton Cheng
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC.
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47
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Horue M, Rivero Berti I, Cacicedo ML, Castro GR. Microbial production and recovery of hybrid biopolymers from wastes for industrial applications- a review. Bioresour Technol 2021; 340:125671. [PMID: 34333348 DOI: 10.1016/j.biortech.2021.125671] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/23/2021] [Accepted: 07/24/2021] [Indexed: 06/13/2023]
Abstract
Agro-industrial wastes to be a global concern since agriculture and industrial processes are growing exponentially with the fast increase of the world population. Biopolymers are complex molecules produced by living organisms, but also found in many wastes or derived from wastes. The main drawbacks for the use of polymers are the high costs of the polymer purification processes from waste and the scale-up in the case of biopolymer production by microorganisms. However, the use of biopolymers at industrial scale for the development of products with high added value, such as food or biomedical products, not only can compensate the primary costs of biopolymer production, but also improve local economies and environmental sustainability. The present review describes some of the most relevant aspects related to the synthesis of hybrid materials and nanocomposites based on biopolymers for the development of products with high-added value.
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Affiliation(s)
- Manuel Horue
- Laboratorio de Nanobiomateriales, CINDEFI, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP) -CONICET (CCT La Plata), Calle 47 y 115, (B1900AJI), La Plata, Buenos Aires, Argentina
| | - Ignacio Rivero Berti
- Laboratorio de Nanobiomateriales, CINDEFI, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP) -CONICET (CCT La Plata), Calle 47 y 115, (B1900AJI), La Plata, Buenos Aires, Argentina
| | - Maximiliano L Cacicedo
- Children's Hospital, University Medical Center, Johannes Gutenberg-University, Mainz, Germany
| | - Guillermo R Castro
- Laboratorio de Nanobiomateriales, CINDEFI, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP) -CONICET (CCT La Plata), Calle 47 y 115, (B1900AJI), La Plata, Buenos Aires, Argentina; Max Planck Laboratory for Structural Biology, Chemistry and Molecular Biophysics of Rosario (MPLbioR, UNR-MPIbpC). Partner Laboratory of the Max Planck Institute for Biophysical Chemistry (MPIbpC, MPG). Centro de Estudios Interdisciplinarios (CEI), Universidad Nacional de Rosario, Maipú 1065, S2000 Rosario, Santa Fe, Argentina.
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48
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Ezeudu OB, Oraelosi TC, Agunwamba JC, Ugochukwu UC. Co-production in solid waste management: analyses of emerging cases and implications for circular economy in Nigeria. Environ Sci Pollut Res Int 2021; 28:52392-52404. [PMID: 34009569 DOI: 10.1007/s11356-021-14471-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Accepted: 05/14/2021] [Indexed: 06/12/2023]
Abstract
Co-production is a paradigm shift from the traditional model of public policymaking and service delivery that advocates for the involvement and participation of end-users of services as co-partaker in the process. In this paper, we examined the emerging models of co-production in solid waste management in Nigeria using a case study methodology. Four cases were purposefully selected for detailed exploration. The results of the analysis show that the involvement of the plurality of the non-state actors in waste management co-production brought in innovation through ICT, financial resources through grants, and increased public awareness. And have also given the service receivers a change of orientation that makes them perceive waste as a source of income rather than all rubbish needed to be discarded. However, possible exploitation of informal waste pickers, unclear business models, and absence of prior arrangement for coming together of both state and non-state actors in designing the service production are challenges to the emerging co-production cases. The current study further shows that the emerging co-production efforts have huge potential in promoting circular economy as it creates a better avenue for the implementation of extended producer responsibility (EPR), the establishment of eco-industrial parks, and safe integration of informal waste recyclers.
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Affiliation(s)
- Obiora B Ezeudu
- Centre for Environmental Management and Control, University Of Nigeria, Enugu Campus, Enugu, 410001, Nigeria.
| | - Tochukwu C Oraelosi
- Department of Mechanical Engineering, Nnamdi Azikiwe University, Awka, Nigeria
| | - Jonah C Agunwamba
- Centre for Environmental Management and Control, University Of Nigeria, Enugu Campus, Enugu, 410001, Nigeria
- Department of Civil Engineering, University of Nigeria, Nsukka, 410001, Nigeria
| | - Uzochukwu C Ugochukwu
- Centre for Environmental Management and Control, University Of Nigeria, Enugu Campus, Enugu, 410001, Nigeria
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Zhuo LC, Chen CF, Lin YH. Dietary supplementation of fermented lemon peel enhances lysozyme activity and susceptibility to Photobacterium damselae for orange-spotted grouper, Epinephelus coioides. Fish Shellfish Immunol 2021; 117:248-252. [PMID: 34418556 DOI: 10.1016/j.fsi.2021.08.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/16/2021] [Accepted: 08/16/2021] [Indexed: 06/13/2023]
Abstract
The waste recycling of lemon peel, as a functional feed additive in aquafeed was evaluated by estimating the effects of fermented lemon peel (FLP) supplementation in diet on growth performance, innate immune responses, and susceptibility to Photobacterium damselae of grouper, Epinephelus coioides. A basal diet was added FLP at 0%, 1%, 3%, and 5%. Four tested diets were each fed to juvenile grouper (initial weight: 15.89 ± 0.10 g, triplicate groups) in a recirculation rearing system for eight weeks. Fish fed diets with 0%-3% FLP exhibited higher (p < 0.05) final weight, weight gain, and feed efficiency than fish fed the 5% FLP-diet. After challenge test, fish fed the 3% FLP-diet appeared the lowest mortality, followed by fish fed the 1% FLP-diet, and lowest in fish fed 0% and 5% FLP-diets. Plasma lysozyme activities were higher in fish fed diets with FLP than in fish fed the FLP-free control diet before challenge test. After challenge, fish fed diets with 1% and 3% FLP showed highest lysozyme activities, followed by fish fed the diet with 5% FLP, and lowest in fish fed the control diet. Hepatic malondialdehyde content was higher in fish fed the control diet than in fish fed diets with 1%-3% FLP. Results found that diets supplemented with 1%-3% fermented lemon peel can enhance lysozyme activity and resistance to pathogen P. damselae of grouper.
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Affiliation(s)
- Li-Chao Zhuo
- Department of Aquaculture National Pingtung University of Science and Technology, No. 1 Shuefu Road, Neipu, Pingtung, 912, Taiwan, ROC
| | - Chien-Fu Chen
- Department of Aquaculture National Pingtung University of Science and Technology, No. 1 Shuefu Road, Neipu, Pingtung, 912, Taiwan, ROC; Symlong Bio-Tech Co., Ltd. 4 F, No. 8, Yuanxi 2nd Road, Changzhi, Pingtung, 908, Taiwan, ROC
| | - Yu-Hung Lin
- Department of Aquaculture National Pingtung University of Science and Technology, No. 1 Shuefu Road, Neipu, Pingtung, 912, Taiwan, ROC.
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50
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Zhang Z, Liu D, Qiao Y, Li S, Chen Y, Hu C. Mitigation of carbon and nitrogen losses during pig manure composting: A meta-analysis. Sci Total Environ 2021; 783:147103. [PMID: 34088163 DOI: 10.1016/j.scitotenv.2021.147103] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/05/2021] [Accepted: 04/08/2021] [Indexed: 06/12/2023]
Abstract
Composting is a reliable way to recycle manure for use on croplands in sustainable agriculture. Poor management of the composting process can result in a decrease in the final compost quality and negative environmental impacts. Optimization technologies during composting have varied effects on the mitigation of carbon (C) and nitrogen (N) losses. To determine the feasibility and effectiveness of mitigation options, a meta-analysis was performed based on 68 studies in which C and/or N losses were investigated during pig manure composting. The results indicated that 48.7% of the total C (TC) was lost with 34.8% as CO2-C and 0.9% as CH4-C, and 27.5% of the total N (TN) was lost with 17.1% as NH3-N and 1.5% as N2O-N. The composting method and bulking agent type obviously influenced the C and N losses. CO2-C and CH4-C emission was significantly influenced by the initial C/N ratio and moisture, respectively. At the same time, NH3-N and N2O-N emissions were remarkably affected by the initial pH and composting duration, respectively. The results of the meta-analysis showed that TC and TN losses were reduced by 12.4% and 27.5%, respectively. Controlling feedstock, including the C/N ratio and moisture, could be regarded as N conservation technology. Controlling aeration, including turning frequency and ventilation rate, would be reliable in reducing greenhouse gas emissions. Applying additives, especially biochar and superphosphate, was found to be an effective method for synergistically mitigating C and N losses. Therefore, the production of high-quality compost products and minimization of environmental pollution will be achieved by a combination of adjusting the initial substrate properties, controlling the composting process conditions and applying additives.
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Affiliation(s)
- Zhi Zhang
- Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China
| | - Donghai Liu
- Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China
| | - Yan Qiao
- Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China
| | - Shuanglai Li
- Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China
| | - Yunfeng Chen
- Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China
| | - Cheng Hu
- Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China.
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