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He M, Cao W, Teng L, Liu W, Ji S, Yu W, Ding C, Wu H, Liu Q. Unveiling the lithium deintercalation mechanisms in spent lithium-ion batteries via sulfation roasting. J Colloid Interface Sci 2024; 663:930-946. [PMID: 38447407 DOI: 10.1016/j.jcis.2024.02.200] [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: 01/19/2024] [Revised: 02/04/2024] [Accepted: 02/27/2024] [Indexed: 03/08/2024]
Abstract
Recovery of valuable metals from spent lithium-ion batteries (LIBs) is of great importance for resource sustainability and environmental protection. This study introduced pyrite ore (FeS2) as an alternative additive to achieve the selective recovery of Li2CO3 from spent LiCoO2 (LCO) batteries. The mechanism study revealed that the sulfation reaction followed two pathways. During the initial stage (550 °C-800 °C), the decomposition and oxidation of FeS2 and the subsequent gas-solid reaction between the resulting SO2 and layered LCO play crucial roles. The sulfation of lithium occurred prior to cobalt, resulting in the disruption of layered structure of LCO and the transformation into tetragonal spinel. In the second stage (over 800 °C), the dominated reactions were the decomposition of orthorhombic cobalt sulfate and its combination with rhombohedral Fe2O3 to form CoFe2O4. The deintercalation of Li from LCO by the substitution of Fe and conversion of Co(III)/Fe(II) into Co3O4/CoFe2O4 were further confirmed by density functional theory (DFT) calculation results. This fundamental understanding of the sulfation reaction facilitated the future development of lithium extraction methods that utilized additives to substantially reduce energy consumption.
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Affiliation(s)
- Minyu He
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
| | - Wen Cao
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
| | - Liumei Teng
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; School of Materials Science and Engineering, Chongqing University of Arts and Sciences, 402160, China
| | - Weizao Liu
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
| | - Sitong Ji
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
| | - Wenhao Yu
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Chunlian Ding
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
| | - Hongli Wu
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
| | - Qingcai Liu
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
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Vuppaladadiyam SSV, Thomas BS, Kundu C, Vuppaladadiyam AK, Duan H, Bhattacharya S. Can e-waste recycling provide a solution to the scarcity of rare earth metals? An overview of e-waste recycling methods. Sci Total Environ 2024; 924:171453. [PMID: 38453089 DOI: 10.1016/j.scitotenv.2024.171453] [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: 11/08/2023] [Revised: 02/27/2024] [Accepted: 03/01/2024] [Indexed: 03/09/2024]
Abstract
Recycling e-waste is seen as a sustainable alternative to compensate for the limited natural rare earth elements (REEs) resources and the difficulty of accessing these resources. Recycling facilitates the recovery of valuable products and minimizes emissions during their transportation. Numerous studies have been reported on e-waste recycling using various techniques, including thermo-, hydro- and biometallurgical approaches. However, each approach still has technical, economic, social, or environmental limitations. This review highlights the potential of recycling e-waste, including outlining the current unutilized potential of REE recycling from different e-waste components. An in-depth analysis of e-waste generation on a global scale and Australian scenario, along with various hazardous impacts on ecosystem and human health, is reported. In addition, a comprehensive summary of various metal recovery processes and their merits and demerits is also presented. Lifecycle analysis for recovering REEs from e-waste indicate a positive environmental impact when compared to REEs produced from virgin sources. In addition, recovering REEs form secondary sources eliminated ca. 1.5 times radioactive waste, as seen in production from primary sources scenario. The review outcome demonstrates the increasing potential of REE recycling to overcome critical challenges, including issues over supply security and localized dependency.
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Affiliation(s)
| | - Bennet Sam Thomas
- Department of Chemical and Biological Engineering, Monash University, Australia
| | - Chandan Kundu
- Department of Chemical and Biological Engineering, Monash University, Australia
| | | | - Huabo Duan
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Sankar Bhattacharya
- Department of Chemical and Biological Engineering, Monash University, Australia.
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Abe Y, Watanabe R, Yodose T, Kumagai S. Cathode active materials using rare metals recovered from waste lithium-ion batteries: A review. Heliyon 2024; 10:e28145. [PMID: 38560163 PMCID: PMC10981055 DOI: 10.1016/j.heliyon.2024.e28145] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Accepted: 03/12/2024] [Indexed: 04/04/2024] Open
Abstract
Large-scale lithium-ion batteries (LIBs) are overtaking as power sources for electric vehicles and grid-scale energy-storage systems for renewable sources. Accordingly, large amounts of LIBs are expected to be discarded in the near future. Recycling technologies for waste LIBs, particularly for valuable rare metals (Li, Co, and Ni) used in cathode active materials, need to be developed to construct continuous LIB supply chains. Various recovery methodologies, such as pyrometallurgy, hydrometallurgy, and direct recycling, as well as their advantages, disadvantages, and technical features, are briefly introduced. We review the electrochemical performances of these cathode active materials based on recycled rare metals from LIB waste. Moreover, the physicochemical properties and electrochemical performance of the cathode active materials with impurities incorporated during recycling, which have high academic significance, are outlined. In hydrometallurgy-based LIB recycling, the complete removal of impurities in cathode active materials is not realistic for the mass and sustainable production of LIBs; thus, optimal control of the impurity levels is of significance. Meanwhile, the studies on the direct recycling of LIB showed the necessity of almost complete impurity removal and restoration of physicochemical properties in cathode active materials. This review provides a survey of the technological outlook of reusing cathode active materials from waste LIBs.
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Affiliation(s)
- Yusuke Abe
- Joint Research Center for Electric Architecture, Akita University, Tegatagakuen-machi 1-1, Akita, 010-8502, Japan
| | - Ryoei Watanabe
- Environmental Protection Laboratory, DOWA ECO-SYSTEM Co., Ltd., 65-1 Omoriyama-shita, Hanaoka, Odate, 017-0005, Japan
| | - Tatsuya Yodose
- Environmental Protection Laboratory, DOWA ECO-SYSTEM Co., Ltd., 65-1 Omoriyama-shita, Hanaoka, Odate, 017-0005, Japan
| | - Seiji Kumagai
- Department of Mathematical Science and Electrical-Electronic-Computer Engineering, Akita University, Tegatagakuen-machi 1-1, Akita, 010-8502, Japan
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Hu X, Zhang H, Pang Y, Cang S, Wu G, Fan B, Liu W, Tan H, Luo G. Performance of feeding black soldier fly (Hermetia illucens) larvae on shrimp carcasses: A green technology for aquaculture waste management and circular economy. Sci Total Environ 2024; 928:172491. [PMID: 38621532 DOI: 10.1016/j.scitotenv.2024.172491] [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: 12/11/2023] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 04/17/2024]
Abstract
Over 944 thousand tonnes of shrimp carcasses are produced worldwide during the shrimp production cycle, and black soldier fly larvae (BSFL) are a potential solution for this shrimp carcass accumulation. In this study, we evaluated the performance of BSFL feeding on shrimp carcasses. Six combinations of wheat bran and shrimp carcass powder (with replacement increments of 20 %) and one whole shrimp carcasses treatment were tested. The bioconversion rate (27.15 ± 3.66 %; p = 0.001), crude protein (55.34 ± 1.27 %; p < 0.001), and crude lipid (14.37 ± 1.86 %; p = 0.007) values of BSFL reared on whole shrimp carcasses were significantly higher than those of BSFL reared on wheat bran. Increasing the shrimp carcass amount in the feeding media resulted in significant increases in BSFL docosahexaenoic acid (with the highest value occurring for BSFL reared on whole shrimp carcasses; 1.46 ± 0.09 %; p < 0.001). Conversely, BSFL docosahexaenoic acid was not detected for BSFL reared on wheat bran. The detected heavy metal concentrations in BSFL were below the limits of the published international guidelines for animal feed. In the obtained BSFL, Salmonella was not detected, and the mould count was <10 CFU/g. The total bacterial count (Lg transformation) of obtained BSFL ranged from 7.88 to 8.07 CFU/g, and no significant differences among all treatments (p = 0.424). Overall, this study demonstrates that BSFL-based bioconversion presents a resource recovery technology for converting shrimp carcasses into high-value nutritional biomass.
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Affiliation(s)
- Xin Hu
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China
| | - Haixin Zhang
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China
| | - Yun Pang
- Innovative Recirculating Aquaculture Systems (Nanjing) Co., Ltd, Nanjing 210019, Jiangsu, China
| | - Shengnan Cang
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China
| | - Gaopeng Wu
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China
| | - Baojie Fan
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China
| | - Wenchang Liu
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China; Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-culture of Aquaculture Animals, Shanghai 201306, China; Key Laboratory of Freshwater Aquatic Germplasm Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
| | - Hongxin Tan
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China; Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-culture of Aquaculture Animals, Shanghai 201306, China; Key Laboratory of Freshwater Aquatic Germplasm Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
| | - Guozhi Luo
- Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China; Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-culture of Aquaculture Animals, Shanghai 201306, China; Key Laboratory of Freshwater Aquatic Germplasm Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China.
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Koirala P, Bhandari Y, Khadka A, Kumar SR, Nirmal NP. Nanochitosan from crustacean and mollusk byproduct: Extraction, characterization, and applications in the food industry. Int J Biol Macromol 2024; 262:130008. [PMID: 38331073 DOI: 10.1016/j.ijbiomac.2024.130008] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 01/04/2024] [Accepted: 02/05/2024] [Indexed: 02/10/2024]
Abstract
Crustaceans and mollusks are widely consumed around the world due to their delicacy and nutritious value. During the processing, only 30-40 % of these shellfish are considered edible, while 70-60 % of portions are thrown away as waste or byproduct. These byproducts harbor valuable constituents, notably chitin. This chitin can be extracted from shellfish byproducts through chemical, microbial, enzymatic, and green technologies. However, chitin is insoluble in water and most of the organic solvents, hampering its wide application. Hence, chitin is de-acetylated into chitosan, which possesses various functional applications. Recently, nanotechnology has proven to improve the surface area and numerous functional properties of metals and molecules. Further, the nanotechnology principle can be extended to nanochitosan formation. Therefore, this review article centers on crustaceans and mollusks byproduct utilization for chitosan, its nano-formation, and their food industry applications. The extensive discussion has been focused on nanochitosan formation, characterization, and active site modification. Lastly, nanochitosan applications in various food industries, including biodegradable food packaging, fat replacer, bioactive compound carrier, and antimicrobial agent have been reported.
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Affiliation(s)
- Pankaj Koirala
- Institute of Nutrition, Mahidol University, 999 Phutthamonthon 4 Road, Salaya, Nakhon Pathom 73170, Thailand
| | - Yash Bhandari
- Department of Nutrition and Dietetics, Central Campus of Technology, Tribhuvan University, Nepal
| | - Abhishek Khadka
- Rural Reconstruction Nepal, 288 Gairidhara Road 2, Kathmandu Metropolitan City, Bagmati, Nepal
| | - Simmi Ranjan Kumar
- Department of Biotechnology, Mahidol University, Bangkok 10400, Thailand
| | - Nilesh Prakash Nirmal
- Institute of Nutrition, Mahidol University, 999 Phutthamonthon 4 Road, Salaya, Nakhon Pathom 73170, Thailand.
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Sutrisno W, Wulandari KD, Abidin MZ, Rizal MN. Properties of concrete mortar incorporating recycle pulverized sandblasting waste as additives. Heliyon 2024; 10:e25623. [PMID: 38370199 PMCID: PMC10867339 DOI: 10.1016/j.heliyon.2024.e25623] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/17/2023] [Accepted: 01/31/2024] [Indexed: 02/20/2024] Open
Abstract
Sandblasting waste is a by-product obtained from the ship maintenance industry which is rich in silica content. This waste has a smaller particle size compared with typical sand and contains a high prevalence of impurities, so it is categorized as toxic and hazardous materials based on Indonesian Law. Furthermore, it also has not been efficiently harnessed, with most of it being relegated to disposal in waste landfills. To solve those problems, this research aimed to reduce the waste by reuse and recycle the sandblasting waste. In this study, the Pulverized Sandblasting Waste (PSW) used as additives in concrete mortars. Prior to use as an additive in mortar, the sandblasting waste was pretreated using chemical and mechanical processes. The mechanical pre-treatment was performed by pulverization for 8 and 12 h, later called PSW8h and PSW12h, respectively. Eleven mixture proportions were designed with constant Cement and w/c ratio. The PSW was added to the mortar specimens with a percentage of 0-5% from the weight of Cement as an additive. The test performed in this study includes compressive strength, Strength Activation Index (SAI), porosity, water absorption, and flexural test. The experimental results show that adding PSW into the mortar can enhance compressive and flexural strength. Furthermore, the results indicate that mortar with PSW has significantly lower porosity and water absorption than the control mixture. Using PSW with finer particle size shows better results in mechanical and durability properties of mortar, especially in concrete compressive and flexural strength.
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Affiliation(s)
- Wahyuniarsih Sutrisno
- Department of Civil Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia
| | - Kiki Dwi Wulandari
- Department of Civil Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia
- Politeknik Perkapalan Negeri Surabaya, Surabaya, 60111, Indonesia
| | - Muhammad Zainal Abidin
- Department of Civil Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia
| | - Moh Najib Rizal
- Department of Environmental Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia
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Amiri Z, Halladj R, Shekarriz M, Rashidi A. Synthesis and application of recyclable magnetic cellulose nanocrystals for effective demulsification of water in crude oil emulsions. Environ Pollut 2024; 342:123042. [PMID: 38040188 DOI: 10.1016/j.envpol.2023.123042] [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: 02/20/2023] [Revised: 10/29/2023] [Accepted: 11/23/2023] [Indexed: 12/03/2023]
Abstract
The development of eco-friendly, efficient, and economical demulsifiers for the demulsification of water in crude oil emulsion is one of the important issues in the petroleum industry. Demulsifiers with suitable performance in several demulsification methods are good choices for effective and economical demulsification. In this study, recyclable magnetic cellulose nanocrystals have been synthesized from cotton by a simple method and used in the demulsification of water in crude oil emulsions. Chemical and magnetic demulsification by magnetic cellulose nanocrystals has been investigated. In addition, the effects of time, temperature, and demulsifier concentration on the demulsification efficiency have been evaluated. According to the results, this demulsifier can be used as an effective demulsifier for both chemical and magnetic demulsification and displayed a demulsification efficiency of 100 % at 50 °C without a magnet and 90 % at 20 °C with a magnet. The chemical demulsification efficiency of Fe3O4 nanoparticles was investigated and it showed lower DE compared to magnetic cellulose nanocrystals. The recyclability tests of the demulsifier indicated that magnetic cellulose nanocrystals can be used up to 4 times. Finally, the demulsification mechanism and interfacial tension measurements revealed that this demulsifier reduced the interfacial tension between water and crude oil and increased the water droplet sizes.
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Affiliation(s)
- Zahra Amiri
- Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Rouein Halladj
- Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
| | - Marzieh Shekarriz
- Chemical, Polymeric, and Petrochemical Technology Research Division, Faculty of Research and Development in Downstream Petroleum Industry, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
| | - Alimorad Rashidi
- Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
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Tu Y, Su Z, Zhang Y, Jiang T. Detoxication and recycling of chromium slag and C-bearing dust via composite agglomeration process (CAP)-blast furnace method. Waste Manag 2023; 171:227-236. [PMID: 37666148 DOI: 10.1016/j.wasman.2023.08.034] [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: 05/09/2023] [Revised: 07/16/2023] [Accepted: 08/29/2023] [Indexed: 09/06/2023]
Abstract
The utilization of virulent chromium slag has always been a worldwide problem, and lots of C-bearing dust produced in steel industry has not been utilized efficiently. Sintering is a potential method to treat these two kinds of solid wastes, but it is limited by small treatment capacity, incomplete detoxification of Cr(Ⅵ) when they were directly added into sintering process. In this study, an innovative technology of co-processing chromium slag and C-bearing dust via composite agglomeration process (CAP)-blast furnace method was put forward and systematically investigated. In the CAP, the chromium slag and C-bearing dust were first made into composite pellets and added into the matrix feed for co-sintering. The results showed that, 20% chromium slag and 5% C-bearing dust could be co-disposed by the CAP without destroying the quality of the sinters. Cr(VI) was completely reduced to Cr(III) or metal Cr. 12.83% Cr existed as metal Cr, and the rest of Cr existed in spinel as (Mg, Fe)(Cr, Al)2O4 or in silico-ferrite of calcium and alumina as Cr(Ⅲ). After blast furnace smelting, 90.22% Cr in sinters entered stainless mother liquor to be recycled.
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Affiliation(s)
- Yikang Tu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Zijian Su
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
| | - Yuanbo Zhang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
| | - Tao Jiang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
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Zhao Z, Sun L, Sha Z, Chu C, Wang Q, Zhou D, Wu S. Valorisation of fresh waste grape through fermentation with different exogenous probiotic inoculants. Heliyon 2023; 9:e16650. [PMID: 37274685 PMCID: PMC10238925 DOI: 10.1016/j.heliyon.2023.e16650] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 05/19/2023] [Accepted: 05/23/2023] [Indexed: 06/06/2023] Open
Abstract
The disposal of fresh waste grape berries restraining the sustainable development of vineyards. The aims of this study were to evaluate the effects of different exogenous probiotic inoculants on the fermentation of fresh waste grape berries. In the fermentation process, the variations of pH and EC value, chemical characteristics of the fermentation products, as well as the microbial communities' composition were simultaneously observed. In addition, the feasibility of using the fermentation products as chemical fertilizer substitute in agricultural production also has been verified in this study. The results indicated that the different probiotic inoculants has shown clear impacts on the variation trends of pH and EC value in the grape waste fermentation. Lactobacillus casei and Zygosaccharomyces rouxii are ideal probiotics for the fermentation of waste grape, which enhanced the contents of free Aa and other nutrients in fermentation products. Compared with Fn treatment (without exogenous inoculants), the total free Aa contents in Fs (inoculation with Z. rouxii) and Fm (inoculation with L. casei and Z. rouxii mixture) treatments have improved by 199.1% and 325.5%, respectively. The microbial communities' composition during the fermentation process also been greatly influenced by the different inoculants. At the genus level, Lactobacillus and Pseudomonas were the dominant bacteria, while Saccharomyces and Candida were the dominant fungi in the fermentation. Using the fermentation products as chemical fertilizer substitute has enhanced the quality of Kyoho grape. Compared with traditional chemical fertilization treatment (T1), application with fermented grape waste (T2) has significantly improved VC and soluble solid contents in grape berries by 16.89% and 20.12%, respectively. In conclusion, fermentation with suitable probiotics was an efficient approach for the disposal and recycling of fresh waste grape in vineyards.
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Affiliation(s)
- Zheng Zhao
- Eco-environmental Protection Institute of Shanghai Academy of Agricultural Sciences, Shanghai, 201403, China
| | - Lina Sun
- Eco-environmental Protection Institute of Shanghai Academy of Agricultural Sciences, Shanghai, 201403, China
| | - Zhimin Sha
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Changbin Chu
- Eco-environmental Protection Institute of Shanghai Academy of Agricultural Sciences, Shanghai, 201403, China
| | - Qingfeng Wang
- Eco-environmental Protection Institute of Shanghai Academy of Agricultural Sciences, Shanghai, 201403, China
| | - Deping Zhou
- Eco-environmental Protection Institute of Shanghai Academy of Agricultural Sciences, Shanghai, 201403, China
| | - Shuhang Wu
- Eco-environmental Protection Institute of Shanghai Academy of Agricultural Sciences, Shanghai, 201403, China
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Shah G, Bhatt U, Soni V. A comprehensive review on triple R eco-management strategies to reduce, reuse and recycle of hazardous cigarette butts. Heliyon 2023; 9:e16642. [PMID: 37292331 PMCID: PMC10245253 DOI: 10.1016/j.heliyon.2023.e16642] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/23/2023] [Accepted: 05/23/2023] [Indexed: 06/10/2023] Open
Abstract
Cigarettes are the globally consumed product that contributes to public health problems and is the source of the most prevalent form of litter in the world, Cigarette butts. Cigarette butts are a major source 4000 toxic chemicals, affecting the health of wildlife, humans, and the environment and their decomposition can take years due to the resistance of cellulose acetate to bacterial and fungal degradation. In 2016, the world production of cigarettes exceeded 5.7 trillion, with the majority of them consisting of cellulose acetate filters. Consequently, a massive amount of hazardous waste leaches out in the environment. Incineration and landfilling are methods of disposal, but they can result in the emission of harmful fumes and be costly. To combat this environmental issue, researchers have explored the recycling of cigarette butts in various materials, including asphalt concrete, fired clay bricks, and as a carbon source, among others. Various approaches can be used to reduce cigarette butts pollution, but efficient collection logistics by consumers remains a crucial factor for successful recycling. This paper provides innovative solutions to mitigate the cigarette butts litter problem and the feasibility of recycling methods. Despite recent progress in cigarette butts recycling solutions, there is still much room for research in this area.
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Al-Gheethi A, Ma NL, Rupani PF, Sultana N, Yaakob MA, Mohamed RMSR, Soon CF. Biowastes of slaughterhouses and wet markets: an overview of waste management for disease prevention. Environ Sci Pollut Res Int 2023; 30:71780-71793. [PMID: 34585345 PMCID: PMC8477996 DOI: 10.1007/s11356-021-16629-w] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 09/16/2021] [Indexed: 06/12/2023]
Abstract
Slaughterhouse and wet market wastes are pollutants that have been always neglected by society. According to the Food and Agriculture Organization of the United Nations, more than three billion and nineteen million livestock were consumed worldwide in 2018, which reflects the vast amount and the broad spectrum of the biowastes generated. Slaughterhouse biowastes are a significant volume of biohazards that poses a high risk of contamination to the environment, an outbreak of diseases, and insecure food safety. This work comprehensively reviewed existing biowaste disposal practices and revealed the limitations of technological advancements to eradicate the threat of possible harmful infectious agents from these wastes. Policies, including strict supervision and uniform minimum hygienic regulations at all raw food processing factories, should therefore be tightened to ensure the protection of the food supply. The vast quantity of biowastes also offers a zero-waste potential for a circular economy, but the incorporation of biowaste recycling, including composting, anaerobic digestion, and thermal treatment, nevertheless remains challenging.
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Affiliation(s)
- Adel Al-Gheethi
- Micropollutant Research Centre (MPRC), Faculty of Civil Engineering & Built Environment, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia
| | - Nyuk Ling Ma
- Faculty of Science and Marine Environment, University Malaysia Terengganu, 21030, Kuala Terengganu, Terengganu, Malaysia
| | - Parveen Fatemeh Rupani
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, Jiangsu, China.
| | - Naznin Sultana
- Medical Academy, Prairie View A&M University, Prairie View, TX, 77446, USA
| | - Maizatul Azrina Yaakob
- Institute for Integrated Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia
| | - Radin Maya Saphira Radin Mohamed
- Micropollutant Research Centre (MPRC), Faculty of Civil Engineering & Built Environment, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia
| | - Chin Fhong Soon
- Microelectronics and Nanotechnology-Shamsuddin Research Centre, Institute for Integrated Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia.
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Song Y, Xie R, Tian M, Mao B, Chai F. Controllable synthesis of bifunctional magnetic carbon dots for rapid fluorescent detection and reversible removal of Hg 2. J Hazard Mater 2023; 457:131683. [PMID: 37276695 DOI: 10.1016/j.jhazmat.2023.131683] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/30/2023] [Accepted: 05/21/2023] [Indexed: 06/07/2023]
Abstract
Mercury is one of the most toxic heavy metals, whose identification and separation are crucial for environmental remediation. Till now, it remains a significant challenge upon simultaneous detection and removal of Hg2+. Herein, bifunctional probe magnetic carbon dots were synthesized and optimized via systematic structure manipulation of the carbon and iron precursors towards fluorescence, Hg2+ adsorption and magnetic separation. The probe exhibited blue emission at 440 nm with high quantum yield of 55 % and a high paramagnetism with the saturation magnetization value of 22.70 emu/g. Furthermore, the fluorescent detection of Hg2+ with limit of 5.40 nM and high selectivity were achieved through surface structure manipulation with moderate -NH2, -SH and Fe contents. As a result, the magnetic removal of Hg2+ was consecutively effectuated with high removal efficiency of 98.30 %. The detection and recovery of Hg2+ in real samples were further verified and demonstrated the excellent environmental tolerance of probe. The reusability was viable with recycling at least three turns by external magnet. This work not only provides a promising approach for simultaneous detection and removal of heavy metal pollution, but also provides an excellent example as a versatile platform for multifunction integration via the structure manipulation for other applications.
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Affiliation(s)
- Ying Song
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China; Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang Province, Ministry of Education, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China
| | - Ruyan Xie
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China; Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang Province, Ministry of Education, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China
| | - Miaomiao Tian
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China; Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang Province, Ministry of Education, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China
| | - Baodong Mao
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Fang Chai
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China; Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang Province, Ministry of Education, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China.
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13
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Shah G, Bhatt U, Soni V. Cigarette: an unsung anthropogenic evil in the environment. Environ Sci Pollut Res Int 2023; 30:59151-59162. [PMID: 37055684 DOI: 10.1007/s11356-023-26867-9] [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: 07/13/2022] [Accepted: 03/30/2023] [Indexed: 04/15/2023]
Abstract
The world's population is growing steadily, and this trend is mirrored by a sharp rise in the number of people who smoke cigarettes. Instead of properly disposing of their cigarette waste, most people simply toss them aside, leading to serious environmental consequences. According to previous statistics, in 2012 alone, 6.25 trillion cigarettes were consumed by 967 million chain smokers. Past studies have shown that up to 30% of global litter is made up of cigarette waste. These discarded cigarette butts are non-biodegradable and contain over 7000 toxicants such as benzene, 1,3-butadiene, nitrosamine ketone, N-Nitrosonornicotine, nicotine, formaldehyde, acrolein, ammonia, aniline, polycyclic aromatic hydrocarbons, and various heavy metals. These toxicants have a negative impact on the habitats of wildlife and can cause serious health problems such as cancer, respiratory disorders, cardiac issues, and sexual dysfunction. Although it is still unclear how littered cigarettes affect plant growth, germination, and development, it is clear that they have the potential to harm plant health. Just like single-use plastic, trashed cigarette butts are a critical new rising form of pollution that requires scientific attention for effective recycling and disposal management. It is important to properly dispose of cigarette waste to protect the environment and wildlife, as well as to prevent harm to human health.
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Affiliation(s)
- Garishma Shah
- Plant Bioenergetics and Biotechnology Laboratory, Department of Botany, Mohanlal Sukhadia University, Udaipur, 313001, Rajasthan, India
| | - Upma Bhatt
- Plant Bioenergetics and Biotechnology Laboratory, Department of Botany, Mohanlal Sukhadia University, Udaipur, 313001, Rajasthan, India
| | - Vineet Soni
- Plant Bioenergetics and Biotechnology Laboratory, Department of Botany, Mohanlal Sukhadia University, Udaipur, 313001, Rajasthan, India.
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14
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Asaoka S, Yoshida G, Ihara I. Sustained release properties of cement-bonded composites with organic waste based anaerobic digestate as nutrient carriers for marine microalgae. Environ Sci Pollut Res Int 2023; 30:56343-56352. [PMID: 36914929 DOI: 10.1007/s11356-023-26355-0] [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: 08/22/2022] [Accepted: 03/05/2023] [Indexed: 06/18/2023]
Abstract
Anaerobic digestate is an organic effluent from biogas plants that generate renewable energy from organic waste under anaerobic conditions. Cement-bonded digestate composites with digestates based on animal manure and food waste based were subjected to sustained release property tests to investigate their utility as nutrient carriers for phytoplankton grown in oligotrophic coastal seas. Batch experiments showed that inorganic phosphate, ammonium nitrogen, and dissolved organic nitrogen species were released from the cement-bonded digestate composite. The inorganic phosphate and ammonium nitrogen were used directly by phytoplankton. The amount of inorganic phosphate and ammonium nitrogen released from the cement-bonded digestate composite was strongly correlated with the inorganic phosphate or nitrogen levels in the composite. This correlation allowed us to estimate the amount of these compounds released from the cement-bonded digestate composite from their concentration of in the anaerobic digestate reactants. The nutrients released from the cement-bonded digestate composite were taken up by marine microalgae, making these composites an effective terrigenous nutrient carrier for the growth of marine microalgae. The cement-bonded digestate composite developed in this study connects terrigenous anaerobic digestate from biogas plants to oligotrophic coastal seas and thus creates a novel nutrient pathway.
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Affiliation(s)
- Satoshi Asaoka
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-4-4 Kagamiyama, Higashihiroshima, 739-8528, Japan.
| | - Gen Yoshida
- Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo, 657-8501, Japan
| | - Ikko Ihara
- Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo, 657-8501, Japan
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15
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Wei Q, Wu Y, Li S, Chen R, Ding J, Zhang C. Spent lithium ion battery (LIB) recycle from electric vehicles: A mini-review. Sci Total Environ 2023; 866:161380. [PMID: 36610625 DOI: 10.1016/j.scitotenv.2022.161380] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 11/29/2022] [Accepted: 12/31/2022] [Indexed: 06/17/2023]
Abstract
Electrifying transportation through the large-scale implementation of electric vehicles (EVs) is an effective route for mitigating urban atmospheric pollution and greenhouse gas emissions and alleviating petroleum-derived fossil fuel reliance. However, huge dumps of spent lithium-ion batteries (LIBs) have emerged worldwide as a consequence of their extensive use in EVs. With the increasing shortage in LIB raw materials, the recycling of spent LIBs has become a fundamental part of a sustainable approach for energy storage applications, considering the potential economic and environmental benefits. In this mini-review, we will provide a state-of-the-art overview of LIB recycling processes (e.g., echelon utilization, pretreatment, valuable metal leaching and separation). We then discuss the sustainability of current LIB recycling processes from the perspectives of life cycle assessment (LCA) and economic feasibility. Finally, we highlight the existing challenges and possibilities of LIB recycling processes and provide future directions that can bridge the gap between proof-of-concept bench demonstrations and facility-scale field deployments through mutual efforts from academia, industry, and government. It is expected that this review could provide a guideline for enhancing spent LIB recycling and facilitating the sustainable development of the field.
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Affiliation(s)
- Qiang Wei
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
| | - Yangyang Wu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Sijia Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Rui Chen
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Jiahui Ding
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
| | - Changyong Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
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16
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Sumner C, Ikuta I, Garg T, Martin JG, Mansoori B, Chalian M, Englander BS, Chertoff J, Woolen S, Caplin D, Sneider MB, Desouches SL, Chan TL, Kadom N. Approaches to Greening Radiology. Acad Radiol 2023; 30:528-535. [PMID: 36114076 DOI: 10.1016/j.acra.2022.08.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [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: 07/10/2022] [Revised: 07/31/2022] [Accepted: 08/09/2022] [Indexed: 01/25/2023]
Abstract
The health care sector is a resource-intensive industry, consuming significant amounts of water and energy, and producing a multitude of waste. Health care providers are increasingly implementing strategies to reduce energy use and waste. Little is currently known about existing sustainability strategies and how they may be supported by radiology practices. Here, we review concepts and ideas that minimize energy use and waste, and that can be supported or implemented by radiologists.
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Affiliation(s)
- Christina Sumner
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia
| | - Ichiro Ikuta
- Department of Radiology & Biomedical Imaging, Yale Program for Innovation in Imaging Informatics, Department of Radiology, Yale University School of Medicine, New Haven, CT; Mayo Clinic Arizona, Phoenix, Arizona
| | - Tushar Garg
- Division of Vascular and Interventional Radiology, Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Jonathan G Martin
- Department of Radiology, Duke University School of Medicine, Durham, North Carolina
| | - Bahar Mansoori
- Department of Radiology, University of Washington, Seattle, Washington
| | - Majid Chalian
- Department of Radiology, University of Washington, Seattle, Washington
| | - Brian S Englander
- Department of Radiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Jocelyn Chertoff
- Department of Radiology, Dartmouth Health and the Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire
| | - Sean Woolen
- Department of Radiology and Biomedical Imaging, UCSF, San Francisco, California
| | - Drew Caplin
- Division of Interventional Radiology, Donald and Barbara Zucker School of Medicine at Hofstra Northwell, New Hyde Park, New York
| | - Michael B Sneider
- Department of Radiology & Medical Imaging, University of Virginia, Charlottesville, Virginia
| | | | - Tiffany L Chan
- Department of Radiology, University of California, Los Angeles, California
| | - Nadja Kadom
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia; Department of Radiology, Children's Healthcare of Atlanta- Egleston Campus, Atlanta, Georgia.
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17
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Wei N, He Y, Zhang G, Feng Y, Li J, Lu Q, Fu Y. Recycling of valuable metals from spent lithium-ion batteries by self-supplied reductant roasting. J Environ Manage 2023; 329:117107. [PMID: 36566732 DOI: 10.1016/j.jenvman.2022.117107] [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: 09/02/2022] [Revised: 12/17/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
The massive spent lithium-ion batteries (LIBs) need to be recycled due to their increasing decommission in recent years. This paper aims to propose an effective process that uses self-supplied reductant roasting and acid leaching to recover Lithium, Nickle, Cobalt and Manganese from spent LIBs. In the absence of external carbon resources, the waste membrane from spent LIBs was used as the reductant in the self-supplied reductant roasting. A thermodynamic analysis was conducted to judge the possible reduction reaction between the cathode material and waste membrane. Then, the effects of roasting temperature, roasting time and membrane dosage on the crystal structure and phase transformation of roasting products were investigated and optimized. After the roasting process, the valence state of metals in the cathode material decreased and the structure became loose and porous. Moreover, the layer structure of the cathode material was transformed into groups of Li2CO3, Ni, Co, NiO, CoO and MnO. Further, the reduction effect of cathode powders under each roasting condition was verified under the same leaching conditions. After leaching for 30 min, the leaching efficiencies of Li, Ni, Co and Mn were over 99% under the optimum roasting conditions. Finally, economic assessments proved that the proposed process is profitable. The whole process demonstrates an effective and positive way for recycling spent LIBs and making full use of their waste membrane, which promotes resource recovery and environmental protection.
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Affiliation(s)
- Neng Wei
- School of Chemical Engineering and Technology, China University of Mining &Technology, Xuzhou, Jiangsu, 221116, China
| | - Yaqun He
- School of Chemical Engineering and Technology, China University of Mining &Technology, Xuzhou, Jiangsu, 221116, China.
| | - Guangwen Zhang
- School of Environment Science and Spatial Informatics, China University of Mining &Technology, Xuzhou, Jiangsu, 221116, China
| | - Yi Feng
- School of Chemical Engineering and Technology, China University of Mining &Technology, Xuzhou, Jiangsu, 221116, China
| | - Jinlong Li
- School of Chemical Engineering and Technology, China University of Mining &Technology, Xuzhou, Jiangsu, 221116, China
| | - Qichang Lu
- Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai, 810008, China
| | - Yuanpeng Fu
- Taiyuan University of Technology, School of Mining Engineering, Taiyuan, Shanxi, 030024, China
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18
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Saxena M, Sharma S, Bhattacharya A. Thin film poly(vinyl alcohol)-polysulfone composite membranes based on recycled polysulfone: salt separation performances. Environ Sci Pollut Res Int 2023; 30:27716-27729. [PMID: 36383315 DOI: 10.1007/s11356-022-24053-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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
Poly(vinyl alcohol) (PVA)-coated membranes on polysulfone (Ps) (Memb-Pv) were cross-linked using the dibasic maleic acid. The tailoring of membrane properties (viz. hydrophilicity, permeability) develops through the ester linkage due to cross-linking of PVA and maleic acid (MA). Series of Ps asymmetric membranes were prepared using the successive stages of phase inversion of Ps materials. The recyclability approaches of polysulfone (Ps) pertained. The characteristics and transport properties of all the membranes are evaluated. FTIR-ATR, scanning electron (SEM), and atomic force microscopy (AFM) are used for the structural characterization of the membranes. The salient features of Memb-Pv composite membranes support promising results in desalination. The work aimed to highlight the trade-off between the flux and selectivity of composite membranes' salts (bi-/monovalent) through the recycled Ps matrix. The number of recycling stages influences the salt separation performance. The sulfate rejection differs from Memb-IPv (93.26%) to Memb-IVPv (86.70%) for water-I matrix using 2500 mg/L. The defluoridation potential of the membranes is also convincing. The defluoridation performance of Memb-IPv is 87% for 10 mg/L. A significant dimension is added regarding salt separation performance's dependence on the water matrices' nature. The decrease in fluoride separation is ~ 1-3% for the water-2 matrix as the TDS increases.
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Affiliation(s)
- Mayank Saxena
- Membrane Science and Separation Technology Division, Council of Scientific & Industrial Research-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, 364002, Gujarat, India
- Charotar University of Science and Technology, Changa, 388421, Anand, Gujarat, India
| | - Saroj Sharma
- Membrane Science and Separation Technology Division, Council of Scientific & Industrial Research-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, 364002, Gujarat, India
| | - Amit Bhattacharya
- Membrane Science and Separation Technology Division, Council of Scientific & Industrial Research-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, 364002, Gujarat, India.
- Charotar University of Science and Technology, Changa, 388421, Anand, Gujarat, India.
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19
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Wei X, Zhao J, Hayes DJ, Daigneault A, Zhu H. A life cycle and product type based estimator for quantifying the carbon stored in wood products. Carbon Balance Manag 2023; 18:1. [PMID: 36645509 PMCID: PMC9844030 DOI: 10.1186/s13021-022-00220-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: 10/31/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Timber harvesting and industrial wood processing laterally transfer the carbon stored in forest sectors to wood products creating a wood products carbon pool. The carbon stored in wood products is allocated to end-use wood products (e.g., paper, furniture), landfill, and charcoal. Wood products can store substantial amounts of carbon and contribute to the mitigation of greenhouse effects. Therefore, accurate accounts for the size of wood products carbon pools for different regions are essential to estimating the land-atmosphere carbon exchange by using the bottom-up approach of carbon stock change. RESULTS To quantify the carbon stored in wood products, we developed a state-of-the-art estimator (Wood Products Carbon Storage Estimator, WPsCS Estimator) that includes the wood products disposal, recycling, and waste wood decomposition processes. The wood products carbon pool in this estimator has three subpools: (1) end-use wood products, (2) landfill, and (3) charcoal carbon. In addition, it has a user-friendly interface, which can be used to easily parameterize and calibrate an estimation. To evaluate its performance, we applied this estimator to account for the carbon stored in wood products made from the timber harvested in Maine, USA, and the carbon storage of wood products consumed in the United States. CONCLUSION The WPsCS Estimator can efficiently and easily quantify the carbon stored in harvested wood products for a given region over a specific period, which was demonstrated with two illustrative examples. In addition, WPsCS Estimator has a user-friendly interface, and all parameters can be easily modified.
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Affiliation(s)
- Xinyuan Wei
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA.
- Center for Research on Sustainable Forests, University of Maine, Orono, ME, 04469, USA.
| | - Jianheng Zhao
- Center for Research on Sustainable Forests, University of Maine, Orono, ME, 04469, USA
- School of Forest Resources, University of Maine, Orono, ME, 04469, USA
| | - Daniel J Hayes
- School of Forest Resources, University of Maine, Orono, ME, 04469, USA
| | - Adam Daigneault
- School of Forest Resources, University of Maine, Orono, ME, 04469, USA
| | - He Zhu
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
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20
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Zhang N, Cui X, Wang C, Wu S, Zhao Y, Qi Y, Hou X, Jin H, Deng T. Degradation of vinyl ester resin and its composites via cleavage of ester bonds to recycle valuable chemicals and produce polyurethane. Waste Manag 2023; 155:260-268. [PMID: 36402102 DOI: 10.1016/j.wasman.2022.11.010] [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: 05/12/2022] [Revised: 10/14/2022] [Accepted: 11/06/2022] [Indexed: 06/16/2023]
Abstract
Vinyl ester resins (VER) and its composites are widely used in chemical industry and municipal engineering. However, its dense three-dimensional network structure makes its degradation and recycling a great challenge. Herein, a novel, efficient and green degradation system gamma-valerolactone (GVL)-H2O/p-toluene sulfonic (PTSA) was developed to degrade VER and its composites. VER was completely degraded in the GVL-H2O/PTSA at 210 °C and 0.6 MPa. By combing SEM-EDS, IR, NMR, GPC and MALDI-TOF-MS analysis, it was clarified that VER swelled well in GVL, allowing the transfer of PTSA and H2O through the resin matrix. The ester bonds in VER were cleaved via hydrolysis with H2O catalyzed by the sulfonic acid of PTSA, and high value-added polymer products, i.e., copolymer of styrene and methacrylic acid (SMAA) and bisphenol-A diglycidyl ether (DGEBA), were recycled, which accounted for ca. 87.0 wt% of raw VER. DGEBA can be recycled to prepare a new PU material. The GVL-H2O/PTSA system was also effective for degrading UPR and VER-containing composites. This work provides a practical strategy for chemical degradation and recovery of thermoset VER resins.
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Affiliation(s)
- Ning Zhang
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China
| | - Xiaojing Cui
- Institute of Interface Chemistry and Engineering, Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology, Taiyuan, Shanxi 030008, China
| | - Chizhou Wang
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China
| | - Shaodi Wu
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China
| | - Yuhua Zhao
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China
| | - Yongqin Qi
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China
| | - Xianglin Hou
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China.
| | - Haibo Jin
- Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology/College of New Materials and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
| | - Tiansheng Deng
- Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan 030001, China.
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21
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Kurokawa H, Igei K, Kitsuki A, Kurita K, Managi S, Nakamuro M, Sakano A. Improvement impact of nudges incorporated in environmental education on students' environmental knowledge, attitudes, and behaviors. J Environ Manage 2023; 325:116612. [PMID: 36323122 DOI: 10.1016/j.jenvman.2022.116612] [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: 07/15/2022] [Revised: 10/18/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
This study conducted randomized controlled trials to evaluate the effectiveness of an environmental education class and the impacts of nudges and boosts implemented in this program on high school students' basic knowledge, attitudes, and behaviors regarding environmental issues in Japan. This environmental education class consisted of a lecture on reducing the use of plastic products for energy conservation in daily life, a board game for learning how to reduce plastic waste, and a worksheet for reflection. Four types of worksheets were randomly distributed: nudges, in which students were asked to set a goal regarding their level of effort in not throwing away plastic products such as plastic bags, wet wipes, and plastic bottles; boosts, in which participants were asked to write an essay to help increase their empathy for the parties impacted by environmental issues; both nudges and boosts; and none (neither nudges nor boosts). After environmental education, an end-line survey was conducted to evaluate the effectiveness of this class. This study found that the environmental education class significantly improved students' basic environmental knowledge and promoted their concerns about plastic waste. Although there was no evidence that nudges and boosts amplify the effects of the environmental education class on the students' knowledge, nudges were successful in making them more concerned about plastic waste. The results showed that students who received nudges or boosts were more likely to refuse free wet wipes offered at convenience stores but were not more likely to refuse plastic bottles. These results also indicated that interventions through environmental education can change students' pro-environmental behaviors only if the cost of behavioral change is low. The environmental education class not only increased students' environmental knowledge and attitudes, but the use of worksheets in administering nudges and boosts ensured the effectiveness of environmental education.
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Affiliation(s)
- Hirofumi Kurokawa
- School of Economics and Management, University of Hyogo, 8-2-1 Gakuen-nishi-machi, Nishi-ku, Kobe, Hyogo, 651-2197, Japan.
| | - Kengo Igei
- Graduate School of Media and Governance, Keio University, 5322 Endo, Fujisawa-shi, Kanagawa, 252-0882, Japan
| | - Akinori Kitsuki
- Faculty of Arts and Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Fukuoka, 819-0395, Japan
| | - Kenichi Kurita
- Faculty of Social and Cultural Studies, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Fukuoka, 819-0395, Japan
| | - Shunsuke Managi
- Urban Institute, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Fukuoka, 819-0395, Japan
| | - Makiko Nakamuro
- Faculty of Policy Management, Keio University, 5322 Endo, Fujisawa-shi, Kanagawa, 252-0882, Japan
| | - Akira Sakano
- Zero Waste Japan, 5-18-20 Shinjuku, Shinjuku-ku, Tokyo, 160-0022, Japan
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22
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Dutta R, Baruah K, Dhar S, Ahmed A, Dutta N, Doley S, Sedai P, Dolui SK, Ray BC, Karmakar B. Removal of oils and organic solvents from wastewater through swelling of porous crosslinked poly(ethylene-co-vinyl acetate): Preparation of adsorbent and their oil removal efficiency. Mar Pollut Bull 2023; 186:114488. [PMID: 36563603 DOI: 10.1016/j.marpolbul.2022.114488] [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: 08/09/2022] [Revised: 09/30/2022] [Accepted: 12/10/2022] [Indexed: 06/17/2023]
Abstract
In this novel study, an attempt has been made to prepare porous crosslinked poly(ethylene-co-vinyl acetate) polymer (C-EVA). The porous C-EVA was prepared by grafting of maleic anhydride and cetyl alcohol onto the polymer backbone with addition of NaCl as porogen in the brabender mixture at 120 °C and 80 rpm. This was followed by leaching of NaCl with water extraction to generate a highly porous polymer structure which was evident from its SEM micrographs. The polymer was found to have excellent swelling capacity in various oils and organic solvents and showed good selective absorption capacity. The reusability of the synthesized polymer was studied and it was found that it could be reused for more than 30 absorption desorption cycles without undergoing much change in its absorption capacity. The cross-linked polymeric composite was further characterized by FTIR, TGA, XRD, and SEM.
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Affiliation(s)
- Riku Dutta
- Jadavpur University, Jadavpur, Kolkata, West Bengal 700032, India
| | | | - Sibani Dhar
- Tezpur University, Napaam, Tezpur, Assam 784028, India
| | - Asfi Ahmed
- Tezpur University, Napaam, Tezpur, Assam 784028, India
| | - Nipu Dutta
- Tezpur University, Napaam, Tezpur, Assam 784028, India
| | - Simanta Doley
- Jengraimukh College, Jengraimukh, Majuli, Assam 785105, India
| | - Pitambar Sedai
- Lokanayak Omeo Kumar Das College, Dhekiajuli, Assam 784110, India
| | - S K Dolui
- Tezpur University, Napaam, Tezpur, Assam 784028, India.
| | - B C Ray
- Jadavpur University, Jadavpur, Kolkata, West Bengal 700032, India
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23
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Jin Y, Deng Z, Zhu T. Membrane protein trafficking in the anti-tumor immune response: work of endosomal-lysosomal system. Cancer Cell Int 2022; 22:413. [PMID: 36528587 PMCID: PMC9759898 DOI: 10.1186/s12935-022-02805-6] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 11/24/2022] [Indexed: 12/23/2022] Open
Abstract
Immunotherapy has changed the treatment landscape for multiple cancer types. In the recent decade, great progress has been made in immunotherapy, including immune checkpoint inhibitors, adoptive T-cell therapy, and cancer vaccines. ICIs work by reversing tumor-induced immunosuppression, resulting in robust activation of the immune system and lasting immune responses. Whereas, their clinical use faces several challenges, especially the low response rate in most patients. As an increasing number of studies have focused on membrane immune checkpoint protein trafficking and degradation, which interferes with response to immunotherapy, it is necessary to summarize the mechanism regulating those transmembrane domain proteins translocated into the cytoplasm and degraded via lysosome. In addition, other immune-related transmembrane domain proteins such as T-cell receptor and major histocompatibility are associated with neoantigen presentation. The endosomal-lysosomal system can also regulate TCR and neoantigen-MHC complexes on the membrane to affect the efficacy of adoptive T-cell therapy and cancer vaccines. In conclusion, we discuss the process of surface delivery, internalization, recycling, and degradation of immune checkpoint proteins, TCR, and neoantigen-MHC complexes on the endosomal-lysosomal system in biology for optimizing cancer immunotherapy.
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Affiliation(s)
- Yan Jin
- grid.412632.00000 0004 1758 2270Cancer Center, Renmin Hospital of Wuhan University, Wuhan, 430060 China
| | - Zhifeng Deng
- grid.412632.00000 0004 1758 2270Department of Otolaryngology Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, 430060 China
| | - Ting Zhu
- grid.412632.00000 0004 1758 2270Department of Otolaryngology Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, 430060 China
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24
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Ji J, Zhao T, Li F. Remediation technology towards zero plastic pollution: Recent advance and perspectives. Environ Pollut 2022; 313:120166. [PMID: 36116565 DOI: 10.1016/j.envpol.2022.120166] [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: 04/20/2022] [Revised: 08/12/2022] [Accepted: 09/09/2022] [Indexed: 06/15/2023]
Abstract
The rapid growth of plastic wastes exceeds efforts to eliminate plastic pollution owing to the outbreak of COVID-19 in 2020 and then aggravates inherent environmental threats to the ecosystem. The paper provided a short introduction relating to the hazards of plastic wastes on environment and a detailed statement about plastic toxicity on human. The article stated on plastic how to enter the body and cause harm for us step by step. Given the toxicity and harm of plastic wastes on human, the degradation of plastic wastes via the physical, chemical and biotic methodologies is looked back. The advanced physical techniques are introduced briefly at firstly. Additionally, evaluate on chemical method for plastic decomposition and review on biotic degradation of plastic. The reactive oxygen species and the enzymes play a crucial role in chemical and biotic degradation processes, respectively. The reactive oxygen species are derived from the activated state of oxides, and the enzymes that aid the microorganism to ingest plastic through its metabolic mechanism are secreted by the microorganism. Subsequently, the potential possibility of upcycling plastic is analyzed from two aspects of the technology and application. The innovative technology utilizes sunlight as driver-power of plastic upcycling. And the carbon capture, utilization and sequestration and the growth substrate provided the novel guided directions for plastic recycle. Lastly, the three suggestions on plastic waste management are expected to establish an economy and efficient plastic sorting system, and two engineering solutions on plastic recycle are to make a contribution for sustainable upcycling of plastic.
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Affiliation(s)
- Jianghao Ji
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Tong Zhao
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Fanghua Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China.
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Meiryani, Huang SM, Soepriyanto G, Audrelia J, Fahlevi M, Aljuaid M, Grabowska S. An exploration of circular water management accountability: A case from Indonesia. Heliyon 2022; 8:e10556. [PMID: 36148275 PMCID: PMC9485031 DOI: 10.1016/j.heliyon.2022.e10556] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 04/08/2022] [Accepted: 09/02/2022] [Indexed: 11/29/2022] Open
Abstract
Purpose Palm oil is the leading commodity of the plantation sub-sector in Indonesia, providing a tremendous economic impact for the people and the government. However, the development of oil palm plantations raises the issue of environmental damage because oil palms use large quantities of water. The purpose of this study is to explore circular water management accountability practices through disclosures issued by each company and the effectiveness of water management voluntary disclosure under the Global Reporting Initiative (GRI) standards on increasing stakeholder trust and reducing information asymmetry. Design/methodology/approach This study used secondary data collected from reports published by plantation sub-sector companies listed on the Indonesia Stock Exchange (IDX) and accessible online. Analysis was performed using the method of Miles and Huberman (1992): data reduction, data presentation, conclusion drawing, and verification. Data reduction was conducted by identifying plantation sub-sector companies that reported water management practices consecutively from 2018 to 2020 and seeking all disclosures related to water management and circular water management practices with 3R indicators. Data presentation was carried out by presenting findings from circular water management disclosures and comparing inter-year circular water management accountability practices to examine reporting routines. Finally, conclusions were drawn and verified. Findings The results of this study show that only six of the 20 plantation sub-sector companies reported circular water management with 3R indicators for three consecutive years (2018-2020). Two of these six companies attached GRI index references to their reports consisting of GRI 303 (Water and Effluents) and GRI 306 (Waste), while the other four did not. In addition, water management voluntary disclosure under the GRI standards was shown to increase stakeholder trust and reduce information asymmetry. Originality/value This study raises the concepts of water accounting and circular water management accountability practices in plantation sub-sector companies listed on Indonesia Stock Exchange (IDX).
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Affiliation(s)
- Meiryani
- Accounting Department, School of Accounting, Bina Nusantara University, Jakarta 11480, Indonesia
| | - Shi-Ming Huang
- Department of Accounting and Information Technology, National Chung Cheng University, Chiayi County, Taiwan
| | - Gatot Soepriyanto
- Accounting Department, School of Accounting, Bina Nusantara University, Jakarta 11480, Indonesia
| | - Jessica Audrelia
- Accounting Department, School of Accounting, Bina Nusantara University, Jakarta 11480, Indonesia
| | - Mochammad Fahlevi
- Management Department, BINUS Online Learning, Bina Nusantara University, 11480, Indonesia
| | - Mohammed Aljuaid
- Department of Health Administration, College of Business Administration, King Saud University, Riyadh, Saudi Arabia
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26
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Wang L, Li D, Li X, Liang H, Yue W, Wang L, Pan Y, Huang Y. Recirculation of activated sludge for coagulant synthesis under hydrothermal conditions. Environ Sci Pollut Res Int 2022; 29:66519-66535. [PMID: 35503154 DOI: 10.1007/s11356-022-20490-w] [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: 02/28/2022] [Accepted: 04/24/2022] [Indexed: 06/14/2023]
Abstract
A hypothesis was proposed that the activated sludge was converted into hydrochar full of phenolic hydroxyl and then was made into coagulant by graft copolymerization. The results show that under the addition of HCl, the content of phenolic hydroxyl on the surface of hydrochar (SBC) under hydrothermal conditions increased sharply, up to 1.586 mmol/g, showing that HCl dosage of 0.10 g/g dry sludge and holding time of 4 h was recommended. Under graft copolymerization with the addition of DMC, the coagulant was synthesized. Based on the analysis by FTIR, XPS, zeta potential, etc., the possible synthesis route of coagulant from SBC was that phenolic hydroxyl on SBC was activated by the initiator and then the polymerization between SBC and DMC was triggered. The optimal grafting conditions are gotten. It was named as SBCHCl0.10 g, 4 h-g-DMC0.7. The removal by SBCHCl0.10 g, 4 h-g-DMC0.7 on COD and turbidity in domestic wastewater is up to 69% and 93%, respectively. The component of COD indicated that almost all particulate COD and most of colloidal COD are removed. On the contrary, the removal on dissolved COD can be neglected. Most of NH3-N and P is kept in the wastewater. This is in favor of subsequent reuse and biological treatment.
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Affiliation(s)
- Lu Wang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No.1 Kerui Road, Hi-tech Development District, No.99 Xuefu Road, Suzhou, Jiangsu, China
| | - Dapeng Li
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No.1 Kerui Road, Hi-tech Development District, No.99 Xuefu Road, Suzhou, Jiangsu, China.
| | - Xueying Li
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No.1 Kerui Road, Hi-tech Development District, No.99 Xuefu Road, Suzhou, Jiangsu, China
| | - Hui Liang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No.1 Kerui Road, Hi-tech Development District, No.99 Xuefu Road, Suzhou, Jiangsu, China
| | - Wei Yue
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No.1 Kerui Road, Hi-tech Development District, No.99 Xuefu Road, Suzhou, Jiangsu, China
| | - Lingzhi Wang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No.1 Kerui Road, Hi-tech Development District, No.99 Xuefu Road, Suzhou, Jiangsu, China
| | - Yang Pan
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No.1 Kerui Road, Hi-tech Development District, No.99 Xuefu Road, Suzhou, Jiangsu, China
| | - Yong Huang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No.1 Kerui Road, Hi-tech Development District, No.99 Xuefu Road, Suzhou, Jiangsu, China
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Su C, Cheng M, Tian F, Chen F, Chen R. Anti-oil-fouling Au/BiOCl coating for visible light-driven photocatalytic inactivation of bacteria. J Colloid Interface Sci 2022; 628:955-967. [PMID: 36037717 DOI: 10.1016/j.jcis.2022.08.087] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 08/03/2022] [Accepted: 08/13/2022] [Indexed: 11/18/2022]
Abstract
In this work, gold/bismuth oxychloride (Au/BiOCl) nanocomposites with different morphologies were successfully prepared by simple solvothermal method and sodium borohydride reduction method, which exhibited significantly efficient visible-light-driven photocatalytic disinfection for Staphylococcus aureus (S.aureus). Particularly, the flower-like Au/BiOCl nanocomposite showed the highest photocatalytic bactericidal performance among the prepared Au/BiOCl samples. The radical trapping experiments revealed that the hole was the main reactive species responsible for the inactivation of S.aureus over Au/BiOCl composite. The enhanced photocatalytic bactericidal effect could be attributed to the enhanced adsorption intensity of visible light that originated from the surface plasmon resonance (SPR) effect of Au, rapid transfer and space transport of hot electrons caused by the hierarchical structure of BiOCl layered compound. Furthermore, the Au/BiOCl coating prepared on stainless steel wire mesh via in-situ synthesis method exhibited excellent superhydrophilic/underwater superoleophobic performance, which endowed the coating with anti-oil-fouling in water. More importantly, compared with Au/BiOCl powder catalyst, the prepared Au/BiOCl coating with anti-oil-fouling also possessed high photocatalytic bactericidal activity and stable recycling performance.
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Affiliation(s)
- Chunping Su
- School of Chemistry and Environmental Engineering and Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan 430205, PR China
| | - Mengxi Cheng
- School of Chemistry and Environmental Engineering and Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan 430205, PR China
| | - Fan Tian
- School of Chemistry and Environmental Engineering and Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan 430205, PR China
| | - Fengxi Chen
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, PR China
| | - Rong Chen
- School of Chemistry and Environmental Engineering and Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan 430205, PR China; State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, PR China; Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450002, PR China.
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28
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Sun L, Wu J, Wang J, Yang Y, Zhou W, Yang Y, Du Y, Hu P, Li Y, Li H. CO 2-assisted 'Weathering' of Steel Slag-Derived Calcium Silicate Hydrate: A Generalized Strategy for Recycling Noble Metals and Constructing SiO 2-Based Nanocomposites. J Colloid Interface Sci 2022; 622:1008-1019. [PMID: 35567949 DOI: 10.1016/j.jcis.2022.04.182] [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: 03/14/2022] [Revised: 04/29/2022] [Accepted: 04/30/2022] [Indexed: 10/18/2022]
Abstract
The spent adsorbent loaded by toxic metals is a solid hazardous waste which could cause significant secondary pollution due to potential possible additional release of metal ions. Therefore, the main subject is direct reutilization of spent adsorbents which can further economically and realistically offer new features, like recycling metal adsorbed, or formation of functional SiO2-based nanocomposites. The nanoporous structure and negative surface charges enable steel slag-derived amorphous calcium silicate hydrate (CSH) to retain effectively the incoming metal ions (e. g. Au3+, Ag+, Pd2+, Fe3+, Co2+, Ni2+, Cu2+, Zn2+, Ce3+, Y3+, and Gd3+) by chemisorption. Sparked by natural carbonation 'weathering', which ultimately sequestrates atmospheric CO2 by alkaline silicate minerals to leach calcium from mineral matrix, the decalcification reactions of metal-bearing CSH results in successful recovery of noble metals (Ag, Au, Pd) upon NaOH etching the resultant SiO2 support. Further, SiO2-based heterostructures, containing nanocrystalline metals (e. g. Au0, Ag0, Pd0, Fe0, Co0, Ni0, Cu0, and Zn0) or rare-earth oxides (e. g. CeO2, Y2O3, and Gd2O3), are formed after reduction in H2/Ar (5 vol% H2) flow, which is also very important for the multipurpose immobilization of diverse hybrid materials on SiO2 surface (e. g. Cu0-Ag0@SiO2, Cu0-CeO2@SiO2, and Cu0-Ag0-CeO2@SiO2).
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Affiliation(s)
- Lingmin Sun
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
| | - Junshu Wu
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China.
| | - Jinshu Wang
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China.
| | - Yunfei Yang
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
| | - Wenyuan Zhou
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
| | - Yilong Yang
- Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan 467036, China
| | - Yucheng Du
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
| | - Peng Hu
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
| | - Yongli Li
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
| | - Hongyi Li
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
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29
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Wang C, Huang C, Xu H, Yuan N, Liu X, Bai L, He X, Liu R. Ceramsite production using water treatment residue as main ingredient: The key affecting factors identification. J Environ Manage 2022; 308:114611. [PMID: 35114517 DOI: 10.1016/j.jenvman.2022.114611] [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: 09/01/2021] [Revised: 01/18/2022] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
As an inevitable by-product of potable water production, drinking water treatment residue (DWTR) recycling to make ceramsite can provide both environmental and economic benefits in constructing filtration treatment system for water environment remediation. Given the varied properties of DWTR from different waterworks, this study aims to identify the key factors affecting ceramsite production from DWTR as main ingredient based on five different DWTR with using clay as the auxiliary material. The results showed that of sintering temperature (500-1000 °C), DWTR:clay ratio (5:5 to 9:1), sintering time (5-60 min), and granule diameter (5-15 mm), the sintering temperature was the key parameter. Increasing temperatures from 500 to 1000 °C gradually promoted DWTR sintering by enhancing Si and Al crystallization, which typically increased the formation of SiO2 and CaAl2Si2O8 crystals in ceramsite. Ceramsites made from different DWTR tended to have different properties, mainly resulting from varied contents of Si (20.2%-48.6%), K (0.0894%-2.39%), Fe (4.56%-14.3%), and loss on ignition (11.7%-39.5%). During ingredients preparation to produce up-to-standard ceramsite, supplying additional Si and diluting loss on ignition were necessary for all DWTR, while supplying K and diluting Fe may be required for specific DWTR, due to the potential varied DWTR compositions caused by different water production processes applied (e.g., type of flocculants). Further toxicity characteristic leaching procedure analysis indicated the increased leaching of Cu. However, DWTR based ceramsite was identified as non-hazardous material; even, sintering treatment reduced the leachability of Ba, Be, Cd, and Cr. DWTR based ceramsite also had relatively high specific surface area (22.1-50.5 m2/g) and could adsorb Cd, Cu, and Pb from solution. Overall, based on appropriate management, DWTR can be recycled as the main ingredient in the production of ceramsite for water environment remediation.
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Affiliation(s)
- Changhui Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.
| | - Chenghao Huang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; Graduate University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Huacheng Xu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Nannan Yuan
- School of Electronic Information, Nanjing Vocational College of Information Technology, Nanjing, China
| | - Xin Liu
- College of Biology and Environment, Nanjing Forestry University, Nanjing, 210037, China
| | - Leilei Bai
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Xiaosong He
- State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
| | - Rui Liu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; College of Biology and Environment, Nanjing Forestry University, Nanjing, 210037, China; Xuzhou Xinsheng Luyuan Cyclic Economy Industrial Investment & Development Co. Ltd., Xuzhou, 221003, China
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30
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Wei D, Kong J, Lyu J, Zhuang Y, Xing P. Efficient recycling of silicon cutting waste by AlSi alloying with the assistance of cryolite. Sci Total Environ 2022; 816:151580. [PMID: 34774957 DOI: 10.1016/j.scitotenv.2021.151580] [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: 09/28/2021] [Revised: 11/04/2021] [Accepted: 11/06/2021] [Indexed: 06/13/2023]
Abstract
Silicon cutting waste (SCW) generated during Si wafers producing process can be recycled by AlSi alloying process. However, the presence of O in SCW has a detrimental impact on recycling process. In this study, cryolite was introduced to eliminate the hindrance of O. The influences of smelting temperature and the amount of cryolite additive on the yield of the blocky AlSi alloys and the Si recovery ratio of the SCW have been investigated and the alloying conditions were optimized to a smelting temperature of 1000 °C and a cryolite/SCW mass ratio of 0.8, achieving a AlSi alloys yield of 95.99% and a Si recovery ratio of 84.77%, which were far greater than those without cryolite additive. The results showed that the addition of cryolite additive can effectively improve the smelting effect and reduce the alloying temperature. Furthermore, the action mechanism of cryolite in Al-SCW system was analyzed, and the results revealed that the molten cryolite can dissolve the generated Al2O3 existing on the surface of AlSi alloy droplets and finally contributes to the aggregation of these droplets. This method has advantages including high Si recovery ratio of SCW, low alloying temperature and simple technological process.
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Affiliation(s)
- Donghui Wei
- School of Metallurgy, Northeastern University, Shenyang 110819, PR China
| | - Jian Kong
- School of Metallurgy, Northeastern University, Shenyang 110819, PR China
| | - Jingyi Lyu
- School of Metallurgy, Northeastern University, Shenyang 110819, PR China
| | - Yanxin Zhuang
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China
| | - Pengfei Xing
- School of Metallurgy, Northeastern University, Shenyang 110819, PR China.
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31
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Sabour MR, Derhamjani G, Akbari M. Mechanical, durability properties, and environmental assessment of geopolymer mortars containing waste foundry sand. Environ Sci Pollut Res Int 2022; 29:24322-24333. [PMID: 34825325 DOI: 10.1007/s11356-021-17692-z] [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: 08/25/2021] [Accepted: 11/18/2021] [Indexed: 06/13/2023]
Abstract
Today, with the expansion of industries and construction activities, attention to environmental issues such as sustainable development, recycling, reuse, etc. becomes important. The global demand for cement production has been increasing. One ton of cement releases about one ton of carbon dioxide into the atmosphere. Also, after freshwater, sand is considered the second natural resource that is consumed.Due to the limited sand resources and the concerns around the environmental issues of cement production, in this study, the use of waste foundry sand (WFS) as an alternative to aggregate in slag-based geopolymer mortars as an alternative to cement has been considered. WFS is a by-product of the foundry industry, which is produced in large quantities and buried in landfills, and slag is the by-product of iron and steel making process which is highly cementitious and high in calcium silicate hydrates (CSH).In this study, the mechanical, durability properties, and environmental assessment of geopolymer mortars using WFS were investigated. The results show that the compressive strength of geopolymer mortars containing treated WFS at the age of 91 days had an increase of 158% compared to cement-based mortars. The adhesion and flexural strength in geopolymer mortars containing treated WFS compared to untreated mortars increased by 145% and 18%, respectively. Toxicity characteristic leaching procedure (TCLP) results showed that the concentration of heavy metals in the leachate WFS, mortars containing treated and untreated WFS, and ground granulated blast-furnace (GGBF) slag was within the standard permitted limitations and WFS is not a hazardous waste.
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Affiliation(s)
- Mohammad Reza Sabour
- Civil Engineering Faculty, K. N. Toosi University of Technology, No. 1346, Valiasr Street, 19967-15433, Tehran, Iran
| | - Ghazaleh Derhamjani
- Civil Engineering Faculty, K. N. Toosi University of Technology, No. 1346, Valiasr Street, 19967-15433, Tehran, Iran.
| | - Mohammadamin Akbari
- Civil Engineering Faculty, K. N. Toosi University of Technology, No. 1346, Valiasr Street, 19967-15433, Tehran, Iran
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Yang J, Zhang W, Wang Y, Li M, Peng F, Bian J. Novel, recyclable Brønsted acidic deep eutectic solvent for mild fractionation of hemicelluloses. Carbohydr Polym 2022; 278:118992. [PMID: 34973795 DOI: 10.1016/j.carbpol.2021.118992] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/07/2021] [Accepted: 12/05/2021] [Indexed: 12/20/2022]
Abstract
Acidic deep eutectic solvents (DESs) are promising media for lignin valorization and cellulose conversion due to their good ability in efficient deconstruction of plant cell wall. However, hemicellulose extraction from lignocellulose using acidic DESs remains a challenge. Herein, novel and green Brønsted acidic DESs (BDESs) were synthesized from natural organic acids and common polyols and successively adopted to deconstruct corncob for mild fractionation of hemicelluloses. Oxalic acid (OA)-based BDESs were preferred for corncob processing due to the high solubility of xylan. The results revealed that the suitable acidity of DESs and mild temperature effectively avoided the over-degradation of hemicelluloses. The chemical composition and structural features of the recovered hemicelluloses were investigated systematically. Moreover, after ethylene glycol (EG)-OA BDES was recycled and reused three times, the extraction still resulted in a satisfactory hemicellulose yield. The novel and eco-friendly processing offers a practical and sustainable route for hemicellulose extraction in acidic condition.
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Affiliation(s)
- Jiyou Yang
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
| | - Wanjing Zhang
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
| | - Yang Wang
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
| | - Mingfei Li
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
| | - Feng Peng
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
| | - Jing Bian
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China.
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Song Z, Xiu FR, Qi Y. Degradation and partial oxidation of waste plastic express packaging bags in supercritical water: Resources transformation and pollutants removal. J Hazard Mater 2022; 423:127018. [PMID: 34461531 DOI: 10.1016/j.jhazmat.2021.127018] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [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: 06/28/2021] [Revised: 08/18/2021] [Accepted: 08/21/2021] [Indexed: 06/13/2023]
Abstract
Millions of waste plastic express packaging bags (PEPBs) were generated with the rapid development of the express delivery industry due to the boom of electronic commerce. Waste PEPBs contain polyethylene (PE) material and large number of pollutants such as plasticizers and flame retardants. In this study, two effective and environmental-friendly methods were proposed to produce valuable products and remove pollutants from waste PEPBs by supercritical water degradation (SCWD) and supercritical water partial oxidation (SCWPO) treatments. Both SCWD and SCWPO treatments could effectively obtain valuable products (wax, liquid oil, CaCO3) and remove bisphenol A (BPA) and di-(2-ethylhexyl) phthalate (DEHP) from waste PEPBs. No obvious difference about the conversion could be found between SCWD and SCWPO treatments. 425 °C, 60 min, solid-to-liquid ratio of 1:20 g/mL, and V(H2O2):V(H2O) ratio of 1:3 mL/mL were the optimal conditions for the conversion of waste PEPBs by SCWD and SCWPO treatments. The maximum conversion could reach 98.13%. The produced wax and liquid oil were easily separated from each other. The produced wax mainly included long-chain olefins or long-chain alkanes, and a small amount of alcohols, ethers and aldehydes. SCWD treatment was favorable for obtaining long-chain alkenes, while SCWPO treatment was favorable for obtaining long-chain alkanes. The main chemical compounds contained in the produced liquid oil were decomposed from DEHP and BPA. DEHP was decomposed to produce 2-ethyl-1-hexanol and acetophenone. BPA was decomposed to produce 4-tert-butylphenol and other alkylated derivatives of benzene and phenol. In comparison with SCWD treatment, DEHP and BPA could be decomposed more thoroughly by SCWPO treatment.
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Affiliation(s)
- Zhiqi Song
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Fu-Rong Xiu
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China; Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi'an 710054, China.
| | - Yingying Qi
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China; Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi'an 710054, China
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Zhang J, Zou D, Zhai S, Yan Y, Yang H, He C, Ke Y, Singh S, Cheng G. Enhancing the interaction between cellulose and dilute aqueous ionic liquid solutions and its implication to ionic liquid recycling and reuse. Carbohydr Polym 2022; 277:118848. [PMID: 34893258 DOI: 10.1016/j.carbpol.2021.118848] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/10/2021] [Accepted: 11/01/2021] [Indexed: 11/25/2022]
Abstract
Cellulose-dissolving ionic liquids (ILs) have been used in biomass pretreatment for over a decade. Cellulose solubility in the ILs is strongly inhibited by water, which has negative impacts on IL pretreatment and reuse of the recycled ILs. Here, a distillation and aeration apparatus was used as the reactor for biomass pretreatment in dilute aqueous IL solutions and in recycled IL liquor without drying or purification. Four biomass types, switchgrass, miscanthus, sorghum and pine, were studied. X-ray diffraction (XRD) was used to measure the interaction between biomass and the IL. Small angle neutron scattering (SANS) was applied to monitor the changes of the pore structure in wet biomass samples. Satisfactory enzymatic hydrolysis results were obtained among all the pretreated samples.
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Affiliation(s)
- Jinxu Zhang
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3(rd) Ring East, # 15, Beijing 100029, China.
| | - Dongzhe Zou
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3(rd) Ring East, # 15, Beijing 100029, China.
| | - Siyu Zhai
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3(rd) Ring East, # 15, Beijing 100029, China.
| | - Yin Yan
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3(rd) Ring East, # 15, Beijing 100029, China.
| | - Hua Yang
- Dongguan Neutron Source Science Center, Dongguan 523803, China; Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China.
| | - Chunyong He
- Dongguan Neutron Source Science Center, Dongguan 523803, China; Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China.
| | - Yubin Ke
- Dongguan Neutron Source Science Center, Dongguan 523803, China; Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China.
| | - Seema Singh
- Deconstruction Division, Joint BioEnergy Institute (JBEI), 5885 Hollis Street, Emeryville, CA 94608, USA; Sandia National Laboratories, 7011 East Ave, Livermore, CA 94551, USA.
| | - Gang Cheng
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3(rd) Ring East, # 15, Beijing 100029, China.
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35
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Ye F, Wang G, Ao Y, Shen L, Yang Y, Feng X, Zhang Z, Yuan H, Mi Y, Yan X. Recyclable amine-functionalized carbon nanotubes for the separation of oily wastewater. Chemosphere 2022; 288:132571. [PMID: 34655642 DOI: 10.1016/j.chemosphere.2021.132571] [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: 07/13/2021] [Revised: 10/09/2021] [Accepted: 10/12/2021] [Indexed: 06/13/2023]
Abstract
In this work, a CNTs-NH2 demulsifier was prepared by grafting ethylenediamine on the surface of carbon nanotubes to break oily wastewater. The physicochemical and interfacial properties of CNTs-NH2 were characterized and analyzed. It showed that CNTs-NH2 had an eminent amphipathicity and high interfacial activity, which allows it to sharply migrates to the interface and effectively interacts with interfacial film by the combined action of π-π interaction and electrostatic attraction. The demulsification tests exhibited that CNTs-NH2 could effectively remove emulsified oil from the oily wastewater. It could be used at acidic and neutral conditions, and high salinity. Moreover, it could be recycled and still maintained its interfacial activity, thusly vastly enhancing the application scope. The light transmittance was up to 88.1% and the corresponding oil removal rate was 99.2% with 100 mg/L of CNTs-NH2 for 30 min. The oil removal rate of CNTs-NH2 remained above 97.8% after 6 cycles. This work provides a deep understanding on the design of demulsifier and its demulsification mechanism.
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Affiliation(s)
- Fan Ye
- School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China
| | - Gang Wang
- School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China
| | - Yiling Ao
- School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China
| | - Liwei Shen
- School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China
| | - Ying Yang
- School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China
| | - Xuening Feng
- School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China
| | - Zejun Zhang
- School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China
| | - Huaikui Yuan
- School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China
| | - Yuanzhu Mi
- School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China.
| | - Xuemin Yan
- School of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China.
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36
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Chen J, Yang R, Zhang Z, Wu D. Removal of fluoride from water using aluminum hydroxide-loaded zeolite synthesized from coal fly ash. J Hazard Mater 2022; 421:126817. [PMID: 34396971 DOI: 10.1016/j.jhazmat.2021.126817] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [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: 05/27/2021] [Revised: 08/01/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
The removal of fluoride from wastewater is essential as the excess accumulation of fluoride in environment is harmful to the health of humans. In this study, the defluorination of water by aluminum hydroxide-coated zeolite (AHZ), which was synthesized from coal fly ash, was investigated in batches. The Langmuir maximum adsorption capacity of fluoride by AHZ reached 18.12 mg/g. Aluminum hydroxide was shown to be the major component that adsorbed fluoride. More than 92% removal of fluoride was achieved within 2 h, and the fluoride adsorption kinetics were well fitted to a pseudo-second-order model. The point of zero charge (pHpzc) of the AHZ was determined to be 5.52. Fluoride adsorption by AHZ depended greatly on pH, and maximum performance was obtained at pH 5.5-6.5. The AHZ showed good selectivity for the adsorption of fluoride in the presence of chloride, nitrate, sulfate, bicarbonate, and acetate ions, and the fluoride was nearly exhausted at a sufficiently high dose. The release of OH- due to fluoride adsorption was confirmed. FTIR and XPS studies further illustrated that the adsorption mechanism of fluoride adsorption on AHZ was ligand exchange with hydroxyl groups and the formation of F-Al bonds.
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Affiliation(s)
- Jiabin Chen
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China
| | - Renjie Yang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China
| | - Zhiyong Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China
| | - Deyi Wu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China.
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37
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Han J. Barcoding drug information to recycle unwanted household pharmaceuticals: a review. Environ Chem Lett 2022; 20:2989-3003. [PMID: 35496467 PMCID: PMC9043091 DOI: 10.1007/s10311-022-01420-1] [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: 01/31/2022] [Accepted: 02/15/2022] [Indexed: 05/02/2023]
Abstract
Huge quantities of unwanted pharmaceuticals are left in households, notably as a consequence of the rising drug demand caused by improved healthcare and the aging population. Unwanted pharmaceuticals may thus easily end up polluting ecosystems upon disposal. This pharmaceutical waste issue has been aggravated during the coronavirus disease pandemic (COVID-19) by excess prescription and panic buying. Unwanted household pharmaceuticals are normally collected by owners and volunteers, then incinerated in centralized facilities, yet with low efficiency during the COVID-19 lockdowns. Most pharmaceuticals could be recycled because they are rather stable, however there is actually no sustainable strategy to manage unwanted pharmaceuticals in a pandemic. Here I review the management of unwanted pharmaceuticals in households during the pandemic, with emphasis on drug take-back programs, waste minimization and recycling efforts. Reducing pharamaceutical waste could be done by informing people on what to do with unwanted pharmaceutical products; using machine-readable codes for automatic sorting; and applying existing techniques for recovery of active pharmaceutical ingredients for reuse. I propose a new strategy where owners sort their unwanted pharmaceuticals and submit information online. This will generate coded mailing labels that allow the owner to separate pharmaceuticals into categories such as opened, unused, expired, and non-expired. Once collected by recycling facilities and manufacturers, active ingredients will be extracted to create new pharmaceuticals which will be recycled to other patients.
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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
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38
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Ferrero A, Thouvenin R, Hoogewoud F, Marcireau I, Offret O, Louison P, Monnet D, Brézin AP. The carbon footprint of cataract surgery in a French University Hospital. J Fr Ophtalmol 2021; 45:57-64. [PMID: 34823888 DOI: 10.1016/j.jfo.2021.08.004] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 08/13/2021] [Indexed: 11/24/2022]
Abstract
PURPOSE To assess the carbon footprint of cataract surgery in a French university hospital. SETTING Operating room of Cochin University Hospital, Paris, France. DESIGN Single-center component analysis. METHODS One day of surgery was used as a reference. Greenhouse gases (GHG) related to patient and staff transportation were calculated based on the distance travelled and the means of transportation used. The annual consumption of energy (heating and electricity) of our building was converted in kg equivalent of carbon dioxide (CO2eq), and the principle of proportionality was used to calculate what was used for a single cataract procedure. GHG emissions related to the life cycle assessment (LCA) of the equipment used and the sterilization process were calculated. RESULTS The LCA of disposable items accounted for 59.49kg (73.32%) of CO2eq for each procedure. A single procedure generated 2.83±0.10kg of waste. The average CO2eq produced by the transportation of the patients to and from our center, adjusted for one procedure, was 7.26±6.90kg (8.95%) of CO2eq. The CO2eq produced by the sterilization of the phacoemulsifier handpiece was 2.12kg (2.61%). The energy consumption of the building and staff transportation accounted for the remaining CO2eq emissions, 0.76kg (0.93%) and 0.08kg (0.10%) respectively. Altogether, the carbon footprint of one cataract procedure in our center was 81.13kg CO2eq - the equivalent of an average car driving 800km. CONCLUSION Our data provide a basis to quantify cataract surgery as a source of GHG and suggests that reductions in emissions can be achieved.
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Affiliation(s)
- A Ferrero
- Université de Paris, Hôpital Cochin, Service d'ophtalmologie, Paris, France
| | - R Thouvenin
- Université de Paris, Hôpital Cochin, Service d'ophtalmologie, Paris, France
| | - F Hoogewoud
- Université de Paris, Hôpital Cochin, Service d'ophtalmologie, Paris, France
| | - I Marcireau
- Université de Paris, Hôpital Cochin, Service d'ophtalmologie, Paris, France
| | - O Offret
- Université de Paris, Hôpital Cochin, Service d'ophtalmologie, Paris, France
| | - P Louison
- Hôpital Cochin, service d'ingénierie, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France
| | - D Monnet
- Université de Paris, Hôpital Cochin, Service d'ophtalmologie, Paris, France
| | - A P Brézin
- Université de Paris, Hôpital Cochin, Service d'ophtalmologie, Paris, France.
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39
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Wei Z, Cheng J, Wang R, Li Y, Ren Y. From spent Zn-MnO 2 primary batteries to rechargeable Zn-MnO 2 batteries: A novel directly recycling route with high battery performance. J Environ Manage 2021; 298:113473. [PMID: 34358937 DOI: 10.1016/j.jenvman.2021.113473] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 01/28/2021] [Revised: 08/01/2021] [Accepted: 08/01/2021] [Indexed: 06/13/2023]
Abstract
For the first time, spent Zn-MnO2 primary batteries are recycled to directly build rechargeable Zn-MnO2 batteries with a mixed solution of sulfuric acid and hydrogen peroxide as the leachate, which aimed to the efficient recovery of spent Zn-MnO2 primary batteries and the realization of high-powered rechargeable Zn-MnO2 batteries. After simple purification, the leached liquid is directly used as the working solution to prepare an electrolytic rechargeable Zn-MnO2 battery. The experimental results show that the performance of the recycling solution of the neutral Zn-MnO2 primary battery was better than that of the alkaline Zn-MnO2 primary battery, and both performed better than the solution prepared with chemically pure reagents. After optimizing the pH of the working solution and charging current, the obtained rechargeable Zn-MnO2 battery can provide an energy efficiency of 72.33 % ± 0.55, a coulombic efficiency of 90.17 % ± 0.71, and excellent cycle stability. These experimental results show that spent Zn-MnO2 primary batteries can be successfully recycled to prepare rechargeable Zn-MnO2 batteries, demonstrating very good application potential.
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Affiliation(s)
- Zhaohuan Wei
- School of Physics, University of Electronic Science and Technology of China, Chengdu, 611731, China.
| | - Jun Cheng
- School of Physics, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Rui Wang
- School of Materials and Environmental Engineering, Chengdu Technological University, Chengdu, 611730, China
| | - Yang Li
- School of Physics, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Yaqi Ren
- School of Materials and Environmental Engineering, Chengdu Technological University, Chengdu, 611730, China.
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40
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Nguyen PTT, Do NHN, Goh XY, Goh CJ, Ong RH, Le PK, Phan-Thien N, Duong HM. Recent Progresses in Eco-Friendly Fabrication and Applications of Sustainable Aerogels from Various Waste Materials. Waste Biomass Valorization 2021; 13:1825-1847. [PMID: 34745389 PMCID: PMC8560886 DOI: 10.1007/s12649-021-01627-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 06/28/2021] [Accepted: 10/24/2021] [Indexed: 06/13/2023]
Abstract
Tons of waste from residential, commercial and manufacturing activities are generated due to the growing population, urbanization and economic development, prompting the need for sustainable measures. Numerous ways of converting waste to aerogels, a novel class of ultra-light and ultra-porous materials, have been researched to tackle the issues of waste. This review provides an overview of the status of aerogels made from agricultural waste, municipal solid, and industrial waste focusing on the fabrication, properties, and applications of such aerogels. The review first introduced common methods to synthesize the aerogels from waste, including dispersion and drying techniques. Following that, numerous works related to aerogels from waste are summarized and compared, mainly focusing on the sustainability aspect of the processes involved and their contributions for environmental applications such as thermal insulation and oil absorption. Next, advantages, and disadvantages of the current approaches are analyzed. Finally, some prospective waste aerogels and its applications are proposed.
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Affiliation(s)
- Phuc T. T. Nguyen
- Department of Mechanical Engineering, National University of Singapore, Singapore, Singapore
| | - Nga H. N. Do
- Refinery and Petrochemical Technology Research Centre, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Xue Yang Goh
- Department of Mechanical Engineering, National University of Singapore, Singapore, Singapore
| | - Chong Jin Goh
- Department of Mechanical Engineering, National University of Singapore, Singapore, Singapore
| | - Ren Hong Ong
- Department of Mechanical Engineering, National University of Singapore, Singapore, Singapore
| | - Phung K. Le
- Refinery and Petrochemical Technology Research Centre, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Nhan Phan-Thien
- Department of Mechanical Engineering, National University of Singapore, Singapore, Singapore
| | - Hai M. Duong
- Department of Mechanical Engineering, National University of Singapore, Singapore, Singapore
- University of Cuu Long (UCL), Vinh Long, Vinh Long Province Vietnam
- Department of Chemical Engineering, Stanford University, Stanford, USA
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41
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Hua Y, Wang C, Wang S, Xiao J. Poly(catechol) modified Fe 3O 4 magnetic nanocomposites with continuous high Fenton activity for organic degradation at neutral pH. Environ Sci Pollut Res Int 2021; 28:62690-62702. [PMID: 34215976 DOI: 10.1007/s11356-021-15088-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 12/19/2020] [Accepted: 06/20/2021] [Indexed: 06/13/2023]
Abstract
Fe3O4 magnetic nanoparticles (MNPs) have been widely used as a recyclable catalyst in Fenton reaction for organic degradation. However, the pristine MNPs suffer from the drawbacks of iron leaching in acidic conditions as well as the decreasing catalytic activity of organic degradation at a pH higher than 3.0. To solve the problems, Fe3O4 MNPs were modified by poly(catechol) (Fe3O4/PCC MNPs) using a facile chemical co-precipitation method. The poly(catechol) modification improved both the dispersity and the surface negative charges of Fe3O4/PCC MNPs, which are beneficial to the catalytic activity of MNPs for organic degradation. Moreover, the poly(catechol) modification enhanced the efficiency of Fe(II) regeneration during Fenton reaction due to the acceleration of Fe(III) reduction by the phenolic/quinonoid redox pair. As a result, the Fenton reaction with Fe3O4/PCC MNPs could efficiently degrade organic molecules, exampled by methylene blue (MB), in an expanded pH range between 3.0 and 10.0. In addition, Fe3O4/PCC MNPs could be reused up to 8 cycles for the MB degradation with negligible iron leaching of lower than 1.5 mg L-1. This study demonstrated Fe3O4/PCC MNPs are a promising heterogeneous Fenton catalysts for organic degradation.
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Affiliation(s)
- Yani Hua
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou, 510006, China
- Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
| | - Chuan Wang
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou, 510006, China.
| | - Sha Wang
- Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
| | - Juan Xiao
- School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, China
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Aketo T, Waga K, Yabu Y, Maeda Y, Yoshino T, Hanada A, Sano K, Kamiya T, Takano H, Tanaka T. Algal biomass production by phosphorus recovery and recycling from wastewater using amorphous calcium silicate hydrates. Bioresour Technol 2021; 340:125678. [PMID: 34339995 DOI: 10.1016/j.biortech.2021.125678] [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: 06/15/2021] [Revised: 07/23/2021] [Accepted: 07/24/2021] [Indexed: 06/13/2023]
Abstract
The phosphorous supply crisis is a major challenge for a sustainable society, and the algal industry is not unrelated to this crisis. Recycling phosphorus from sewage wastewater is a potential way to address this issue. We previously developed amorphous calcium silicate hydrates (aCSH) as excellent phosphorus recovery materials. In this study, we designed a phosphorus recovery process using aCSH in a pilot-scale facility connected to a sewage wastewater treatment plant, and demonstrated the production of microalgal biomass using phosphorous-containing aCSH (P_aCSH). As a result, high phosphorous recovery rates (>80%) were obtained throughout the year. The carbohydrate-rich microalga Pseudoneochloris sp. NKY372003 was cultivable with P_aCSH. The biomass and carbohydrate productivity of this microalga with P_aCSH was comparable to that with conventional media. Approximately 94% of the phosphorus in P_aCSH was recycled into the biomass. This study successfully demonstrated the recycling the phosphorus recovered from wastewater for microalgal cultivation by aCSH.
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Affiliation(s)
- Tsuyoshi Aketo
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan; Central Research Laboratory, Taiheiyo Cement Corporation, 2-4-2, Osaku, Sakura City, Chiba 285-8655, Japan
| | - Kentaro Waga
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Yusuke Yabu
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Yoshiaki Maeda
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Tomoko Yoshino
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Akiko Hanada
- Central Research Laboratory, Taiheiyo Cement Corporation, 2-4-2, Osaku, Sakura City, Chiba 285-8655, Japan
| | - Koki Sano
- Central Research Laboratory, Taiheiyo Cement Corporation, 2-4-2, Osaku, Sakura City, Chiba 285-8655, Japan
| | - Takashi Kamiya
- Central Research Laboratory, Taiheiyo Cement Corporation, 2-4-2, Osaku, Sakura City, Chiba 285-8655, Japan
| | - Hiroyuki Takano
- Central Research Laboratory, Taiheiyo Cement Corporation, 2-4-2, Osaku, Sakura City, Chiba 285-8655, Japan
| | - Tsuyoshi Tanaka
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan.
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Chen YC, Liu HM. Evaluation of greenhouse gas emissions and the feed-in tariff system of waste-to-energy facilities using a system dynamics model. Sci Total Environ 2021; 792:148445. [PMID: 34147799 DOI: 10.1016/j.scitotenv.2021.148445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 03/29/2021] [Revised: 06/08/2021] [Accepted: 06/09/2021] [Indexed: 06/12/2023]
Abstract
This study used a system dynamics model to evaluate the potential greenhouse gas (GHG) emissions from different waste-to-energy (WTE) facilities such as landfill sites, WTE plants, anaerobic digestion (AD)-based WTE plants, and material recovery facilities. On average, landfilling and incinerating 1 t of municipal solid waste (MSW) produced 1807.0 kg carbon dioxide (CO2)-eq/t and 373.3 kg CO2-eq/t of GHG emissions, respectively. Recycling waste helped to mitigate the GHG emissions and the output to merely 78.9 kg CO2-eq/t. Excess emission of 1848 t CO2-eq/y GHG accounted for the 3 percentage point difference in the electricity generation efficiency of WTE plants (25%) and AD-based WTE plants (28%). Therefore, it is suggested that the priority for MSW treatment should be AD-based WTE plants, WTE plants, and stand-alone AD systems (in descending order) to ensure maximum electricity generation and mitigation of GHG emissions. GHG emissions were most sensitive to the recycling rate, proportion of dry matter, and electricity coefficient. The predicted benefit to cost ratios of WTE and AD-based WTE plants in 2049 were 2.29 and 3.92, respectively. Based on these data, this study inferred that the feed-in tariff system, despite its high capital costs, must be encouraged to reduce the economic burden of WTE facilities.
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Affiliation(s)
- Ying-Chu Chen
- Department of Civil Engineering, National Taipei University of Technology, Taipei 106, Taiwan, ROC.
| | - Hsiao-Man Liu
- Institute of Environmental Engineering and Management, National Taipei University of Technology, Taipei 106, Taiwan, ROC
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Awes H, Zaki Z, Abbas S, Dessoukii H, Zaher A, Abd-El Moaty SA, Shehata N, Farghali A, Mahmoud RK. Removal of Cu 2+ metal ions from water using Mg-Fe layered double hydroxide and Mg-Fe LDH/5-(3-nitrophenyllazo)-6-aminouracil nanocomposite for enhancing adsorption properties. Environ Sci Pollut Res Int 2021; 28:47651-47667. [PMID: 33895951 DOI: 10.1007/s11356-021-13685-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 08/21/2020] [Accepted: 03/24/2021] [Indexed: 05/27/2023]
Abstract
Herein, a new adsorbent was prepared by modifying Mg-Fe LDH for the removal of Cu2+ metal ions from wastewater. Mg-Fe LDH with 5-(3-nitrophenyllazo)-6-aminouracil ligand has been successfully prepared using direct co-precipitation methods and was fully characterized using FTIR analysis, X-ray diffraction, BET surface area theory, zeta potential, partial size, TGA/DTA, CHN, EDX, FESEM, and HRTEM. The surface areas of Mg-Fe LDH and Mg-Fe LDH/ligand were 73.9 m2/g and 34.7 m2/g respectively. Moreover, Cu2+ adsorption on LDH surfaces was intensively examined by adjusting different parameters like time, adsorbent dosage, pH, and Cu2+ metal ion concentration. Several isotherm and kinetic models were investigated to understand the mechanism of adsorption towards Cu2+ metal ions. Adsorption capacity values of LDH and ligand-LDH rounded about 165 and 425 mg/g respectively, applying nonlinear fitting of Freundlich and Langmuir isotherm equations showing that the ligand-LDH can be considered a potential material to produce efficient adsorbent for removal of heavy metal from polluted water. The adsorption of Cu2+ metal ions followed a mixed 1,2-order mechanism. The isoelectric point (PZC) of the prepared sample was investigated and discussed. The effect of coexisting cations on the removal efficiency of Cu2+ ions shows a minor decrease in the adsorption efficiency. Recyclability and chemical stability of these adsorbents show that using Mg-Fe LDH/ligand has an efficiency removal for Cu2+ ions higher than Mg-Fe LDH through seven adsorption/desorption cycles. Moreover, the recycling of the Cu2+ ions was tested using cyclic voltammetry technique from a neutral medium, and the Cu2+ ion recovery was 68%.
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Affiliation(s)
- Hanna Awes
- Department of Chemistry, Faculty of Science, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Zinat Zaki
- Department of Chemistry, Faculty of Science, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Safa Abbas
- Department of Chemistry, Faculty of Science, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Hassan Dessoukii
- Chemistry Department, Faculty of Science, Benha University, Benha, Egypt
| | - Amal Zaher
- Department of Environmental Science and Industrial Development, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, 62511, Egypt.
| | - Samah A Abd-El Moaty
- Department of Chemistry, Faculty of Science, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Nabila Shehata
- Department of Environmental Science and Industrial Development, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Ahmed Farghali
- Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, Egypt
| | - Rehab K Mahmoud
- Department of Chemistry, Faculty of Science, Beni-Suef University, Beni-Suef, 62511, Egypt
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Nguyen TKL, Ngo HH, Guo W, Nguyen TLH, Chang SW, Nguyen DD, Varjani S, Lei Z, Deng L. Environmental impacts and greenhouse gas emissions assessment for energy recovery and material recycle of the wastewater treatment plant. Sci Total Environ 2021; 784:147135. [PMID: 33894605 DOI: 10.1016/j.scitotenv.2021.147135] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 03/23/2021] [Accepted: 04/10/2021] [Indexed: 06/12/2023]
Abstract
This study investigated the environmental burdens concerning the recycling/recovery process of a wastewater treatment plant's construction material waste and biogas. Detailed data inventories of case studies were employed in several scenarios to explore the role of end-of-life treatment methods. The ReCiPe 2016 and the Greenhouse gas Protocol life cycle impact methods were conducted to measure the impact categories. The construction and demolition phases were considered for recycling potential assessment, while the operational phase was examined for assessing the advantages of energy recovery. Metal and concrete recycling show environmental benefits. Increasing the reprocessing rate requires more water consumption but results in: firstly, a decrease of 18.8% in total damage; secondly, reduces problematic mineral scarcity by 3.9%; and thirdly, a shortfall in fossil fuels amounting to 11.6%. Recycling concrete helps to reduce the amount of GHG emissions 1.4-fold. Different biogas treatment methods contribute to various outcomes. Biogas utilization for on-site energy purposes has more advantages than flaring and offsite consumption. Electricity and heat generation originating from biogas can provide 70% of the energy requirement and replace 100% natural gas usage. Biomethane production from biogas requires extreme power and more resources. Meanwhile, producing heat and electricity can offset 102.9 g of fossil CO2, and manufacturing biomethane contributes the equivalent of 101.2 g of fossil fuel-derived CO2. Reducing 10% of recovered electricity creation could rise 19.19% global warming indicator of the wastewater treatment plant.
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Affiliation(s)
- Thi Kieu Loan Nguyen
- School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Huu Hao Ngo
- School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia; NTT Institute of Hi-Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam.
| | - Wenshan Guo
- School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Thuy Le Hong Nguyen
- School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Soon Woong Chang
- Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea
| | - Dinh Duc Nguyen
- Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea; Institution of Research and Development, Duy Tan University, Da Nang, Viet Nam
| | - Sunita Varjani
- Gujarat Pollution Control Board, Gandhinagar, Gujarat, 382 010, India
| | - Zhongfang Lei
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennoidai, Tsukuba, Ibaraki 305-8572, Japan
| | - Lijuan Deng
- School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
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Abstract
Purpose To seek a simple solution that can recycle and regenerate dental CAD/CAM zirconia green blanks from its waste residuals.Methods Waste residuals (3M® Lava™ Plus HT) were pulverized after dry milling and cutting, and subsequently sieved before pickling in a 0.5 M nitric acid. These powders were then dry-pressed and pre-sintered into blocks at seven different temperatures in the range 800-1100 °C. New zirconia blocks flagged with the same batch numbers were used as control. These blocks were cut into bars before subjected them to manufacturer-recommended sintering at 1450 °C. Crystalline phases (by XRD), elemental compositions (by EDX), surface morphologies (by SEM), machinability, linear shrinkage rate, relative density, and Knoop microhardness were evaluated before and after sintering, and four-point flexural strengths were also evaluated for the sintered zirconia bars.Results Only tetragonal phases were found in both pre- and fully-sintered recycled zirconia blocks. SEM results showed that pre-sintered samples at 950 °C had smooth and flat surfaces with evenly distributed particles. Recycled and control zirconia blocks had similar elemental compositions. Results from machined surface, linear shrinkage rate, relative density, and Knoop microhardness established that 950 °C and 1000 °C were suitable pre-sintering temperatures for recycling zirconia. Pre-sintered recycled zirconia had no significant differences in flexural strengths, however, samples pre-sintered at 1000 °C exhibited the closest value (897 MPa) compared to that of the control (904 MPa).Conclusions Dental CAD/CAM zirconia can be recycled and reused from its waste residuals by adopting a simple method that requires a pre-sintering at 950 or 1000 °C.
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Affiliation(s)
- Hao Ding
- Dental Materials Science, Discipline of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
| | - James Kit-Hon Tsoi
- Dental Materials Science, Discipline of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
| | - Chi-Wai Kan
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong SAR
| | - Jukka P Matinlinna
- Dental Materials Science, Discipline of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
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Kronberg SL, Provenza FD, van Vliet S, Young SN. Review: Closing nutrient cycles for animal production - Current and future agroecological and socio-economic issues. Animal 2021; 15 Suppl 1:100285. [PMID: 34312093 DOI: 10.1016/j.animal.2021.100285] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 11/16/2020] [Revised: 04/08/2021] [Accepted: 04/12/2021] [Indexed: 01/22/2023] Open
Abstract
We face an urgent and complex challenge to produce large amounts of healthful animal and plant foods for an estimated 10 billion people by 2050 while maintaining essential ecosystem services. To compound this challenge, we must do so while not further degrading our environment and conserving essential nutrients such as copper, magnesium, phosphorus, selenium, and zinc that are in short supply for fertilization. Much good research has been done, but to meet this challenge, we need to greatly increase on-farm and watershed-scale research including on-farm evaluations and demonstrations of the putative best combinations of stewardship techniques over multiple years in real-world settings, which are backed by data on nutrient inputs, soil, air, and water chemistry (fluxes) and water discharge. We also need to work with farmers, specialists, and generalists in highly creative interdisciplinary teams that resist forming silos and that use combinations of techniques linked to agroecology and industrial ecology in combination with state-of-the-art engineering. Some of these research and demonstration farms need to be in catchments prone to pollution of aquatic and terrestrial ecosystems with nitrogen, phosphorus, and other nutrients. Some promising approaches include mixed crop-livestock systems, although these alone may not be productive enough without updating to meet the dietary needs of an estimated 10 billion people by 2050. Other approaches could be state-of-the-art multi-trophic production systems, which include several species of plants integrated into production with vertebrates (e.g., ruminants, pigs, poultry), invertebrates (e.g., insects, earthworms) and fish, shrimp, or crayfish to utilize wasted feed and excreta, and recycle nutrients back to the animals (via plants or invertebrates) in the systems. To cut costs and increase desirable outputs, we must recycle nutrients much better within our food production systems and produce both animal and plant foods more efficiently as nutrients cycle through systems.
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Affiliation(s)
- S L Kronberg
- Northern Great Plains Research Laboratory, USDA-Agricultural Research Service, Mandan, ND, United States.
| | - F D Provenza
- Department of Wildland Resources, Utah State University, Logan, UT, United States
| | - S van Vliet
- Duke Molecular Physiology Institute, Duke University Medical Center, Durham, NC, United States
| | - S N Young
- Department of Biological and Agricultural Engineering, North Carolina State University, Raleigh, NC, United States
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Fan Y, Yang Y, Niu B, Liu Z, Dan J, Wang J. Synthesis of sodium silicate using industrial by-products glauber's salt and microsilica: Effective reuse of the waste. Waste Manag 2021; 131:359-367. [PMID: 34243095 DOI: 10.1016/j.wasman.2021.06.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 10/18/2020] [Revised: 06/24/2021] [Accepted: 06/27/2021] [Indexed: 06/13/2023]
Abstract
Large amounts of by-products, including glauber's salt (GS) and microsilica (MS), are accumulated from chlor-alkali industry and ferrosilicon industry development, which not only wastes precious resources, but also causes serious environmental problems. In order to recycle and reuse these industrial by-products, solid sodium silicate was synthesized using GS and MS as the main raw materials, and semi-coke (SC) as the reducing agent. The effects of melting parameters including GS/SC and MS/GS molar ratio, heating rate, temperature, reaction time, and SC particle size on the conversion efficiency and modulus of solid sodium silicate were investigated and optimized. Under optimal conditions, the maximum conversion efficiency of 94.91% was obtained with modulus of 2.5. Characterization analysis of the products indicated that the amorphous silicate sodium was successfully synthesized. Moreover, the reaction mechanism was investigated, which focused on the thermal behavior and phase transformation using thermo-gravimetric and differential scanning calorimetric (TG-DSC) and in-situ X-ray diffraction. Additionally, the causes and suppression measures of "glauber's salt water" (GSW) during the experiment were summarized. This work not only creates resource utilization of GS and MS, but also provides the foundation for the synthesis of sodium silicate with GS.
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Affiliation(s)
- Yongtao Fan
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, PR China
| | - Yue Yang
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, PR China
| | - Baoping Niu
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, PR China
| | - Zhe Liu
- Tianneng Chemical Co., Ltd., Shihezi, PR China
| | - Jianming Dan
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, PR China.
| | - Jinyu Wang
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, PR China.
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Wei D, Kong J, Gao S, Zhou S, Zhuang Y, Xing P. Preparation of Al-Si alloys with silicon cutting waste from diamond wire sawing process. J Environ Manage 2021; 290:112548. [PMID: 33878628 DOI: 10.1016/j.jenvman.2021.112548] [Citation(s) in RCA: 3] [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: 01/17/2021] [Revised: 03/29/2021] [Accepted: 04/02/2021] [Indexed: 06/12/2023]
Abstract
Large amounts of silicon cutting waste (SCW) are generated during Si wafers producing process. In this paper, SCW was mixed with Al powder to prepare Al-Si alloys by a one-step smelting process in corundum crucibles. The influences of smelting temperature (1000 °C, 1200 °C and 1500 °C) on the products of each zone (surface layer zone, loose granular zone and blocky products zone) were investigated. Al-Si alloys in the form of granular and blocky were prepared and the blocky Al-Si alloys mainly concentrated in the blocky products zone. The increase of smelting temperature can promote the aggregation of Al-Si alloy particles. The yields of Al-Si alloy blocks obtained at 1000 °C, 1200 °C and 1500 °C were 0%, 58% and 69%, respectively. The Si contents of Al-Si alloy blocks at 1200 °C and 1500 °C were 15.8 wt% and 17.1 wt% respectively. After compacting the raw materials, the yields of the blocky Al-Si alloys obtained at 1000 °C, 1200 °C and 1500 °C were increased to 65%, 72% and 79% and the corresponding Si contents of the blocky Al-Si alloys were increased to 16.0 wt%, 16.5 wt% and 17.3 wt% respectively. The reaction mechanism of the alloying process was also investigated.
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Affiliation(s)
- Donghui Wei
- School of Metallurgy, Northeastern University, Shenyang, 110819, PR China
| | - Jian Kong
- School of Metallurgy, Northeastern University, Shenyang, 110819, PR China
| | - Shuaibo Gao
- School of Metallurgy, Northeastern University, Shenyang, 110819, PR China
| | - Shibo Zhou
- School of Metallurgy, Northeastern University, Shenyang, 110819, PR China
| | - Yanxin Zhuang
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang, 110819, China
| | - Pengfei Xing
- School of Metallurgy, Northeastern University, Shenyang, 110819, PR China.
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Kumar M, Sharma A, Tabhani N, Otaki Y. Indoor water end-use pattern and its prospective determinants in the twin cities of Gujarat, India: Enabling targeted urban water management strategies. J Environ Manage 2021; 288:112403. [PMID: 33823433 DOI: 10.1016/j.jenvman.2021.112403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 12/03/2020] [Revised: 03/11/2021] [Accepted: 03/13/2021] [Indexed: 06/12/2023]
Abstract
Water end-use studies disaggregate the quantity and frequency of water uses for various household purposes. Water end-use studies are available but none for India, which is gradually approaching a water-scarce condition from being a water-stressed country at present. This implies a need for incorporating water end-use understanding for augmenting urban recycling plans and strategies. To identify socio-demographic determinants of water end-use consumption for use in targeted urban water management, we focused on the indoor micro-components of bathing, dish-washing, laundering, and cleaning at households across the twin cities of Gujarat, a water-scarce province of India. A mixed-method approach was used for data collection in which questionnaire surveys (estimated or indirect measurements) were coupled with water meters (direct measurements) at households. The twin cities of Gujrat represent a spatial variation in greywater production at homes even at a distance of 30-40 km. Direct measurement showed less total average water consumption in Ahmedabad (83 L/HH/d) than Gandhinagar (105 L/HH/d), while indirect measurement showed indoor average consumption of 427 and 497 L/HH/d in the respective cities. Statistical significance of income, family size, and education was noticed on the water consumption pattern of a household. Besides, the study provides the attitude and practice of users towards water conservation behavior. We present new insights and recommendations for future urban water sustainability that are specific to India and applicable to several south-Asian countries.
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Affiliation(s)
- Manish Kumar
- Discipline of Earth Sciences, Indian Institute of Technology Gandhinagar, 382355, Gujarat, India.
| | - Ayushi Sharma
- Discipline of Earth Sciences, Indian Institute of Technology Gandhinagar, 382355, Gujarat, India
| | - Nareshkumar Tabhani
- Gujarat Pollition Control Board, Paryavaran Bhavan, Gandhinagar, 382010, Gujarat, India
| | - Yurina Otaki
- Graduate School of Social Science, Hitotsubashi University, 2-1 Naka, Kunitachi, Tokyo, 186-8601, Japan
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