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Chen Z, Jiang Y, Lai X, Zhu C, Zhang D, Wang H. Co-exposure to pentachlorophenol (PCP) and cadmium (Cd) triggers apoptosis-like cell death in Eschericia coli. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 346:123640. [PMID: 38401637 DOI: 10.1016/j.envpol.2024.123640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 02/10/2024] [Accepted: 02/21/2024] [Indexed: 02/26/2024]
Abstract
Pentachlorophenol (PCP) - cadmium (Cd) complex pollution has been identified as a form of persistent soil pollution in south China, exerting detrimental impacts on the indigenous soil bacterial communities. Hence, it is worthwhile to investigate whether and how bacterial populations alter in response to these pollutants. In this study, Escherichia coli was used as a model bacterium. Results showed that PCP exposure caused bacterial cell membrane permeability changes, intracellular ROS elevation, and DNA fragmentation, and triggered apoptosis-like cell death at low exposure concentration and necrosis at high exposure concentration. Cd exposure caused severe oxidative damage and cell necrosis in the tested bacterial strain. The co-exposure to PCP and Cd elevated the ROS level, stimulated the bacterial caspase activity, and induced DNA fragmentation, thereby leading to an apoptosis-like cell death. In conclusion, PCP-Cd complex pollution can cause bacterial population to decrease through apoptosis-like cell death pathway. However, it is worth noting that the subpopulation survives under the complex pollution stress.
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Affiliation(s)
- Zhilan Chen
- School of Life and Health Sciences, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan, 411201, Hunan Province, China; Key Laboratory of Ecological Remediation and Safe Utilization of Heavy Metal-Polluted Soils, College of Hunan Province, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan, 411201, Hunan Province, China.
| | - Yi Jiang
- School of Life and Health Sciences, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan, 411201, Hunan Province, China
| | - Xuebin Lai
- School of Life and Health Sciences, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan, 411201, Hunan Province, China
| | - Chenhong Zhu
- School of Life and Health Sciences, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan, 411201, Hunan Province, China
| | - Dapeng Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing, China
| | - Hailin Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing, China
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2
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Changotra R, Rajput H, Liu B, Murray G, He QS. Occurrence, fate, and potential impacts of wood preservatives in the environment: Challenges and environmentally friendly solutions. CHEMOSPHERE 2024; 352:141291. [PMID: 38280646 DOI: 10.1016/j.chemosphere.2024.141291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 01/08/2024] [Accepted: 01/22/2024] [Indexed: 01/29/2024]
Abstract
Wood preservation has gained global prevalence in recent years, primarily owing to the renewable nature of wood and its capacity to act as a carbon sink. Wood, in its natural form, lacks intrinsic resilience and is prone to decay if left untreated; hence, wood preservatives (WPs) are used to improve wood's longevity. The fate and potential hazards of wood preservatives to human health, ecosystems, and the environment are complex and depend on various aspects, including the type of the preservative compounds, their physicochemical properties, application methods, exposure pathways, environmental conditions, and safety measures and guidelines. The occurrence and distribution of WPs in environmental matrices such as soil and water can result in hazardous pollutants seeping into surface water, groundwater, and soil, posing health hazards, and polluting the environment. Bioremediation is crucial to safeguarding the environment and effectively removing contaminants through hydrolytic and/or photochemical reactions. Phytoremediation, vermicomposting, and sustainable adsorption have demonstrated significant efficacy in the remediation of WPs in the natural environment. Adsorbents derived from biomass waste have been acknowledged for their ability to effectively remove WPs, while also offering cost-efficiency and environmental sustainability. This paper aims to identify wood preservatives' sources and fate in the environment and present a comprehensive overview of the latest advancements in environmentally friendly methods relevant to the removal of the commonly observed contaminants associated with WPs in environmental matrices.
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Affiliation(s)
- Rahil Changotra
- Department of Engineering, Faculty of Agriculture, Dalhousie University, Truro, NS B2N 5E3, Canada
| | - Himadri Rajput
- Department of Engineering, Faculty of Agriculture, Dalhousie University, Truro, NS B2N 5E3, Canada
| | - Baoshu Liu
- School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, China
| | - Gordon Murray
- Stella-Jones Inc. Truro, Nova Scotia, B2N 5C1, Canada
| | - Quan Sophia He
- Department of Engineering, Faculty of Agriculture, Dalhousie University, Truro, NS B2N 5E3, Canada.
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3
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Zhang H, Li Y, Li R, Wu W, Abdelrahman H, Wang J, Al-Solaimani SG, Antoniadis V, Rinklebe J, Lee SS, Shaheen SM, Zhang Z. Mitigation of the mobilization and accumulation of toxic metal(loid)s in ryegrass using sodium sulfide. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 909:168387. [PMID: 37952661 DOI: 10.1016/j.scitotenv.2023.168387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/04/2023] [Accepted: 11/05/2023] [Indexed: 11/14/2023]
Abstract
Remediation of soils contaminated with toxic metal(loid)s (TMs) and mitigation of the associated ecological and human health risks are of great concern. Sodium sulfide (Na2S) can be used as an amendment for the immobilization of TMs in contaminated soils; however, the effects of Na2S on the leachability, bioavailability, and uptake of TMs in highly-contaminated soils under field conditions have not been investigated yet. This is the first field-scale research study investigating the effect of Na2S application on soils with Hg, Pb and Cu contents 70-to-7000-fold higher than background values and also polluted with As, Cd, Ni, and Zn. An ex situ remediation project including soil replacement, immobilization with Na2S, and safe landfilling was conducted at Daiziying and Anle (China) with soils contaminated with As, Cd, Cu, Hg, Ni, Pb and Zn. Notably, Na2S application significantly lowered the sulfuric-nitric acid leachable TMs below the limits defined by Chinese regulations. There was also a significant reduction in the DTPA-extractable TMs in the two studied sites up to 85.9 % for Hg, 71.4 % for Cu, 71.9 % for Pb, 48.1 % for Cd, 37.1 % for Zn, 34.3 % for Ni, and 15.7 % for As compared to the untreated controls. Moreover, Na2S treatment decreased the shoot TM contents in the last harvest to levels lower than the TM regulation limits concerning fodder crops, and decreased the TM root-to-shoot translocation, compared to the untreated control sites. We conclude that Na2S has great potential to remediate soils heavily tainted with TMs and mitigate the associated ecological and human health risks.
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Affiliation(s)
- Han Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
| | - You Li
- Key laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Ronghua Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
| | - Weilong Wu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
| | - Hamada Abdelrahman
- Cairo University, Faculty of Agriculture, Soil Science Department, Giza 12613, Egypt
| | - Jianxu Wang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550082 Guiyang, PR China
| | - Samir G Al-Solaimani
- King Abdulaziz University, Faculty of Meteorology, Environment, and Arid Land Agriculture, 21589 Jeddah, Saudi Arabia
| | - Vasileios Antoniadis
- Department of Agriculture Crop Production and Rural Environment, University of Thessaly, Greece
| | - Jörg Rinklebe
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany
| | - Sang Soo Lee
- Department of Environmental and Energy Engineering, Yonsei University, Wonju 26493, Republic of Korea.
| | - Sabry M Shaheen
- King Abdulaziz University, Faculty of Meteorology, Environment, and Arid Land Agriculture, 21589 Jeddah, Saudi Arabia; University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33516 Kafr El-Sheikh, Egypt.
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
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4
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Yu P, Baker MC, Crump AR, Vogler M, Strawn DG, Möller G. Biochar integrated reactive filtration of wastewater for P removal and recovery, micropollutant catalytic oxidation, and negative CO 2 e: Process operation and mechanism. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2023; 95:e10926. [PMID: 37696540 DOI: 10.1002/wer.10926] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/30/2023] [Accepted: 09/06/2023] [Indexed: 09/13/2023]
Abstract
Biochar (BC) use in water treatment is a promising approach that can simultaneously help address societal needs of clean water, food security, and climate change mitigation. However, novel BC water treatment technology approaches require operational testing in field pilot-scale scenarios to advance their technology readiness assessment. Therefore, the objective of this study is to evaluate the system performance of BC integrated into hydrous ferric oxide reactive filtration (Fe-BC-RF) with and without catalytic ozonation (CatOx) process in laboratory and field pilot-scale scenarios. For this investigation, Fe-BC-RF and Fe-CatOx-BC-RF pilot-scale trials were conducted on synthetic lake water variants and at three municipal water resource recovery facilities (WRRFs) at process flows of 0.05 and 0.6 L/s, respectively. Three native and two iron-modified BCs were used in these studies. The commercially available reactive filtration process (Fe-RF without BC) had 96%-98% total phosphorus (TP) removal from 0.075- and 0.22-mg/L TP, as orthophosphate process influent in these trials. With BC integration, phosphorus removal yielded 94%-98% with the same process-influent conditions. In WRRF field pilot-scale studies, the Fe-CatOx-BC-RF process removed 84%-99% of influent total phosphorus concentrations that varied from 0.12 to 8.1 mg/L. Nutrient analysis on BC showed that the recovered BC used in the pilot-scale studies had an increase in TP from its native concentration, with the Fe-amended BC showing better P recovery at 110% than its unmodified state, which was 16%. Lastly, the field WRRF Fe-CatOx-BC-RF process studies showed successful destructive removals at >90% for more than 20 detected micropollutants, thus addressing a critical human health and environmental water quality concern. The research demonstrated that integration of BC into Fe-CatOx-RF for micropollutant removal, disinfection, and nutrient recovery is an encouraging tertiary water treatment technology that can address sustainable phosphorus recycling needs and the potential for carbon-negative operation. PRACTITIONER POINTS: A pilot-scale hydrous ferric oxide reactive sand filtration process integrating biochar injection typically yields >90% total phosphorus removal to ultralow levels. Biochar, modified with iron, recovers phosphorus from wastewater, creating a P/N nutrient upcycled soil amendment. Addition of ozone to the process stream enables biochar-iron-ozone catalytic oxidation demonstrating typically excellent (>90%) micropollutant destructive removals for the compounds tested. A companion paper to this work explores life cycle assessment (LCA) and techno-economic analysis (TEA) to explore biochar water treatment integrated reactive filtration impacts, costs, and readiness. Biochar use can aid in long-term carbon sequestration by reducing the carbon footprint of advanced water treatment in a dose-dependent manner, including enabling an overall carbon-negative process.
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Affiliation(s)
- Paulo Yu
- Department of Soil and Water Systems, University of Idaho, Moscow, Idaho, USA
| | - Martin C Baker
- Department of Soil and Water Systems, University of Idaho, Moscow, Idaho, USA
| | - Alex R Crump
- Department of Soil and Water Systems, University of Idaho, Moscow, Idaho, USA
| | - Michael Vogler
- Department of Soil and Water Systems, University of Idaho, Moscow, Idaho, USA
| | - Daniel G Strawn
- Department of Soil and Water Systems, University of Idaho, Moscow, Idaho, USA
| | - Gregory Möller
- Department of Soil and Water Systems, University of Idaho, Moscow, Idaho, USA
- Department of Chemical and Biological Engineering, University of Idaho, Moscow, Idaho, USA
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5
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Hassan SH, Chafik Y, Sena-Velez M, Lebrun M, Scippa GS, Bourgerie S, Trupiano D, Morabito D. Importance of Application Rates of Compost and Biochar on Soil Metal(Loid) Immobilization and Plant Growth. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12112077. [PMID: 37299057 DOI: 10.3390/plants12112077] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/14/2023] [Accepted: 05/20/2023] [Indexed: 06/12/2023]
Abstract
In this study, we investigated the effect of different rates of compost (20%, 40%, 60% w/w) in combination with biochar (0%, 2%, 6% w/w) on soil physiochemical properties and the mobility of arsenic (As) and lead (Pb), in addition to the ability of Arabidopsis thaliana (ecotype Columbia-0) to grow and accumulate metal(loid)s. All modalities improved pH and electrical conductivity, stabilized Pb and mobilized As, but only the mixture of 20% compost and 6% biochar improved plant growth. Plants in all modalities showed a significant reduction in root and shoot Pb concentrations compared to the non-amended technosol. In contrast, As shoot concentration was significantly lower for plants in all modalities (except with 20% compost only) compared to non-amended technosol. For root As, plants in all modalities showed a significant reduction except for the mixture of 20% compost and 6% biochar. Overall, our results indicate that the mixture of 20% compost with 6% biochar emerged as the optimum combination for improving plant growth and As uptake, making it the possible optimum combination for enhancing the efficiency of land reclamation strategies. These findings provide a foundation for further research on the long-term effects and potential applications of the compost-biochar combination in improving soil quality.
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Affiliation(s)
- Sayyeda Hira Hassan
- Department of Biosciences and Territory, University of Molise, 86090 Pesche, Italy
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d'Orléans, INRAE, USC 1328, LBLGC EA 1207, CEDEX 2, 45067 Orléans, France
| | - Yassine Chafik
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d'Orléans, INRAE, USC 1328, LBLGC EA 1207, CEDEX 2, 45067 Orléans, France
- Laboratory for Improving Agricultural Production, Biotechnology and the Environment, Department of Biology, Faculty of Sciences, University of Mohammed First, BP717, Oujda 60000, Morocco
| | - Marta Sena-Velez
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d'Orléans, INRAE, USC 1328, LBLGC EA 1207, CEDEX 2, 45067 Orléans, France
| | - Manhattan Lebrun
- Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic
| | | | - Sylvain Bourgerie
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d'Orléans, INRAE, USC 1328, LBLGC EA 1207, CEDEX 2, 45067 Orléans, France
| | - Dalila Trupiano
- Department of Biosciences and Territory, University of Molise, 86090 Pesche, Italy
| | - Domenico Morabito
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d'Orléans, INRAE, USC 1328, LBLGC EA 1207, CEDEX 2, 45067 Orléans, France
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6
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Li J, Lin F, Yu H, Tong X, Cheng Z, Yan B, Song Y, Chen G, Hou L, Crittenden JC. Biochar-Assisted Catalytic Pyrolysis of Oily Sludge to Attain Harmless Disposal and Residue Utilization for Soil Reclamation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:7063-7073. [PMID: 37018050 DOI: 10.1021/acs.est.2c09099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Pyrolysis of oily sludge (OS) is a feasible technology to match the principle of reduction and recycling; however, it is difficult to confirm the feasible environmental destination and meet the corresponding requirements. Therefore, an integrated strategy of biochar-assisted catalytic pyrolysis (BCP) of OS and residue utilization for soil reclamation is investigated in this study. During the catalytic pyrolysis process, biochar as a catalyst intensifies the removal of recalcitrant petroleum hydrocarbons at the expense of liquid product yield. Concurrently, biochar as an adsorbent can inhibit the release of micromolecular gaseous pollutants (e.g. HCN, H2S, and HCl) and stabilize heavy metals. Due to the assistance of biochar, pyrolysis reactions of OS are more likely to occur and require a lower temperature to achieve the same situation. During the soil reclamation process, the obtained residue as a soil amendment can not only provide a carbon source and mineral nutrients but can also improve the abundance and diversity of microbial communities. Thus, it facilitates the plant germination and the secondary removal of petroleum hydrocarbons. The integrated strategy of BCP of OS and residue utilization for soil reclamation is a promising management strategy, which is expected to realize the coordinated and benign disposal of more than one waste.
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Affiliation(s)
- Jiantao Li
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Fawei Lin
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Hongdi Yu
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Xin Tong
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Zhanjun Cheng
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Beibei Yan
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Yingjin Song
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Guanyi Chen
- School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, P. R. China
| | - Li'an Hou
- Xi'an High-Tech Institute, Xi'an 710025, P. R. China
| | - John C Crittenden
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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Jehan S, Khattak SA, Khan S, Ali L, Waqas M, Kamran A. Comparative efficacy of Parthenium hysterophorus (L.) derived biochar and iron doped zinc oxide nanoparticle on heavy metals (HMs) mobility and its uptake by Triticum aestivum (L.) in chromite mining contaminated soils. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 25:1890-1900. [PMID: 37114297 DOI: 10.1080/15226514.2023.2204968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
In this study we investigated the efficacy of a novel material parthenium weed (Parthenium hysterophorus L.) biochar (PBC), iron doped zinc oxide nanoparticles (nFe-ZnO), and biochar modified with nFe-ZnO (Fe-ZnO@BC) to adsorb heavy metals (HMs) and reduce their uptake by wheat (Triticum aestivum L.) in a highly chromite mining contaminated soil. The co-application of the applied soil conditioners exhibited a positive effect on the immobilization and restricted the HMs uptake below their threshold levels in shoot content of wheat. The maximum adsorption capacity was because of large surface area, cation exchange capacity, surface precipitation, and complexation of the soil conditioners. The scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS) showed porous smooth structure of parthenium weed derived biochar that helped in HMs adsorption, increase the efficiency of soil fertilizers and nutrients retention which help in the enhancement soil condition. Under different application rates the highest translocation factor (TFHMs) was obtained at 2 g nFe-ZnO rate followed the descending order: Mn > Cr > Cu > Ni > Pb. The overall TFHMs was found <1.0 indicating that low content of HMs accumulation in roots from soil slight transferred to shoot, thus satisfying the remediation requirements.
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Affiliation(s)
- Shah Jehan
- National Centre of Excellence in Geology, University of Peshawar, Peshawar, Pakistan
- Department of Earth Sciences, IN University-Purdue University Indianapolis (IUPUI), Indianapolis, IN, USA
| | - Seema A Khattak
- National Centre of Excellence in Geology, University of Peshawar, Peshawar, Pakistan
| | - Sardar Khan
- Department of Environmental Sciences, University of Peshawar, Peshawar, Pakistan
| | - Liaqat Ali
- National Centre of Excellence in Geology, University of Peshawar, Peshawar, Pakistan
| | - Muhammad Waqas
- Department of Environmental Sciences, Kohat University of Science and Technology, Kohat, Pakistan
| | - Asad Kamran
- National Centre of Excellence in Geology, University of Peshawar, Peshawar, Pakistan
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8
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Lin K, Zhao Y, Kuo JH, Lin CL. Agglomeration-influenced transformation of heavy metals in gas-solid phases during simulated sewage sludge co-incineration: Effects of phosphorus and operating temperature. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159759. [PMID: 36349628 DOI: 10.1016/j.scitotenv.2022.159759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 10/07/2022] [Accepted: 10/23/2022] [Indexed: 06/16/2023]
Abstract
Phosphorus and operating temperature not only affect the agglomeration behavior but also the transformation and migration of heavy metals. Accordingly, this study examined the effect of temperature and phosphorus in a fluidized bed combustion process to understand the emission and distribution of heavy metals by both experimental and thermodynamic calculations. The experimental results indicated that the sodium-phosphate reactions occur before the sodium-silicate reaction in the solid phase when the ratio of P/Na was 1/2. A low-melting-point sodium phosphate component, such as NaPO3, leads to easier particle agglomeration than Na2O-SiO2. In terms of the emissions of heavy metals, Pb and Cd show a similar trend: both the amount of emission smaller than that without adding phosphorus and the amount of emission share an upward trend with the operating time increased during MSS fluidized bed combustion. However, with the presence of phosphorus, the emission of Cr shows slightly decreased, and then sharply dropped, after that, increasing with operating time increased. Generally speaking, the maximum amount of Pb and Cd emitted was at 900 °C, followed by 800 °C and 700 °C. The higher temperature would promote the volatilization of Pb and Cd to emit. On the other hand, Cr emitted at the beginning tended to increase but later decreases when the temperatures were 700 and 900 °C, which may be due to the emission of Cr being influenced by the different affinities of both Al and Cr, reacting with Na in a fluidized bed incinerator. As for the distribution of heavy metals in the solid phase, a higher concentration of heavy metals was found in both the coarsest and finest particles during the process of agglomeration/defluidization.
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Affiliation(s)
- Kunsen Lin
- The State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Youcai Zhao
- The State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Jia-Hong Kuo
- Department of Safety, Health and Environmental Engineering, National United University, 36063 Miaoli, Taiwan.
| | - Chiou-Liang Lin
- Department of Civil and Environmental Engineering, National University of Kaohsiung, 81148 Kaohsiung, Taiwan
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9
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Narayanan M, Karuppusamy I, Alshiekheid M, Sabour A, Chi NTL, Pugazhendhi A. Phytoremediation potential of Gossypium hirsutum on abandoned polluted chromium sludge soil with the amalgamation of Streptomyces tritici D5. CHEMOSPHERE 2022; 306:135526. [PMID: 35780990 DOI: 10.1016/j.chemosphere.2022.135526] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 05/25/2022] [Accepted: 06/25/2022] [Indexed: 06/15/2023]
Abstract
The phytoremediation potency of Gossypium hirsutum was explored in this research under the influence of pre-identified metal tolerant Streptomyces tritici D5 in Cr enriched sludge soil using various treatment sets (I to V) in a greenhouse setting. Interestingly, the G. hirsutum remarkable remediate the Cr metal from the Cr enriched sludge soil under diluted (50:50) condition in 90 days of greenhouse experiment. The S. tritici D5 also effectively support the growth and phytoremediation competence of G. hirsutum. This was evidenced by the under the diluted (set III) condition the growth and major biomolecules such as protein, carbohydrate, and chlorophyll content of G. hirsutum were considerably increased in quantity. Hence, the phytoremediation potential of G. hirsutum was effective at soil diluted with fertile and xenobiotics free soil with dilution ratio of 50:50 (set III) and followed by 75:25 (set II) ratio. Thus, under diluted conditions (50:50) G. hirsutum seed coated with S. tritici D5 showed an outstanding phytoremediation process. Therefore, this method can be implemented to the field level study to assess the metal removal prospects of this environmentally friendly method.
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Affiliation(s)
- Mathiyazhagan Narayanan
- Division of Research and Innovations, Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Science, Chennai, 602 105, Tamil Nadu, India
| | - Indira Karuppusamy
- Research Center for Strategic Materials, Corrosion Resistant Steel Group, National Institute for Materials Science (NIMS), Tsukuba, Japan
| | - Maha Alshiekheid
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box -2455, Riyadh, 11451, Saudi Arabia
| | - Amal Sabour
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box -2455, Riyadh, 11451, Saudi Arabia
| | - Nguyen Thuy Lan Chi
- School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam.
| | - Arivalagan Pugazhendhi
- Emerging Materials for Energy and Environmental Applications Research Group, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam.
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10
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Li Y, Hou Y, Tao H, Cao H, Liu X, Wang Z, Liao X. An improved non-stationary geostatistical method for three-dimensional interpolation of Benzo(a)pyrene at a contaminated site. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156169. [PMID: 35613641 DOI: 10.1016/j.scitotenv.2022.156169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/18/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
Intense industrial activities and complex hydrogeological conditions at contaminated sites make accurate three-dimensional (3D) mapping challenging. The cause is the non-stationarity in the variance of soil pollutants in geographical space (G-space), making the stationary hypothesis required by the Kriging method unsatisfactory. To handle the variance non-stationarity, a Variance-Octree-Kriging (VOK) method was proposed. VOK is a spatial deformation method that constructs a stationary deformation space (D-space) by stretching and shrinking the G-spaces with low and high spatial correlation, respectively. VOK method consists of 3D stratification in G-space, space scaling and transformation, and ordinary Kriging (OK) in D-space. 3D stratification uses variance octree (VOT) to generate a set of anchor points in the G-space. The spatial scaling and transformation use the virtual force algorithm (VFA) and thin-plate spline to evenly distribute the anchor points and obtain the D-space, where the OK is implemented. The method was applied to predict the distribution of soil Benzo(a)pyrene (BaP) at a contaminated site in North China Plain. The results show that the interpolation accuracy of VOK was 9% higher than that of OK. The VOK method also changed the spatial structure from anisotropic to isotropic. The root mean squared error (RMSE) of fill, silt and clay layers decreased by 4.67%, 11.39%, and 20.46%, respectively. This method is applicable to the 3D interpolation of pollutants at contaminated sites, with the advantages of high interpolation accuracy and the ability to handle the non-stationarity in variance.
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Affiliation(s)
- You Li
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China
| | - Yixuan Hou
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Huan Tao
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongying Cao
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China
| | - Xiaodong Liu
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ziwei Wang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyong Liao
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China.
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11
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Wang W, Lu T, Liu L, Yang X, Li X, Qiu G. Combined remediation effects of biochar, zeolite and humus on Cd-contaminated weakly alkaline soils in wheat farmland. CHEMOSPHERE 2022; 302:134851. [PMID: 35533934 DOI: 10.1016/j.chemosphere.2022.134851] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 04/16/2022] [Accepted: 05/02/2022] [Indexed: 06/14/2023]
Abstract
Threats posed by Cd-contaminated arable soils to food security have attracted increasing attention. The combination of organic and inorganic amendments has been extensively applied to immobilize Cd in paddy soils. However, the regulatory mechanism of Cd fractionation under these combined amendments and the effect on wheat Cd accumulation remain unclear in upland soils. In this work, different combinations of organic and inorganic amendments were prepared with biochar, zeolite and humus, and the Cd-immobilization mechanism was also investigated in field experiments. The results demonstrated that the mixture of biochar, zeolite and humus had excellent Cd immobilization performance in highly Cd-contaminated (4.26 ± 1.25 mg kg-1) weakly alkaline soils, resulting in 76.5-84.8% decreases in soil available Cd. The contribution of single components to Cd immobilization in the combined amendment follows the order of humus > biochar > zeolite. The combined amendment converted the acid soluble Cd to the Cd bound to the reducible fraction with higher stability, thereby decreasing Cd bioavailability. The maximum Cd decrease rate in wheat roots, straw and grains could reach 68.2%, 45.0% and 59.3%, respectively, and the Cd content in grains (0.098 mg kg-1) was lower than the food security standards of China (0.1 mg kg-1). Wheat planting for two successive years in a large-scale field further verified the superior Cd immobilization performance and stability of the combined amendment in moderately to slightly Cd-contaminated soil. The present study provides references for the remediation of Cd-contaminated weakly alkaline upland soils and certain guidance for safe food production.
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Affiliation(s)
- Weihua Wang
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China.
| | - Tao Lu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China.
| | - Lihu Liu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China.
| | - Xiong Yang
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China.
| | - Xuanzhen Li
- College of Forestry, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Guohong Qiu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China.
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12
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Su H, Li P, Wang Y, Wu H, Ma X, Liu Y, Ma Y, Liu S, Xia C. Combination of Soxhlet extraction and catalytic hydrodebromination for remediation of tetrabromobisphenol A contaminated soil. CHEMOSPHERE 2022; 300:134545. [PMID: 35427671 DOI: 10.1016/j.chemosphere.2022.134545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/25/2022] [Accepted: 04/04/2022] [Indexed: 06/14/2023]
Abstract
As a widely used brominated flame retardants (BFRs), tetrabromobisphenol A (TBBPA) has been detected in various environmental matrices and is known to cause negative effects on both the environment and human health. In this study, a combined method was developed for the abatement of TBBPA contaminated soil based on successive steps of solvent extraction (SE) and catalytic hydrodebromination (HDB) over Pd/C. The results showed that TBBPA could be efficiently extracted from the TBBPA contaminated soil with polar solvents. Subsequently, TBBPA could be completely hydrodebrominated over Pd/C in ethanol, via multistep ultimately yielding bisphenol A. Moreover, NaOH, NH3H2O, and Et3N were more favorable to promote the HDB of 4-TBBPA over Pd/C, and 100% bromide atom removal ratio of TBBPA was achieved within 40 min when [NaOH]0/[organic-Br]0 was more than 1.10 in ethanol. However, the catalytic activity of Pd/C decreased with the repeated use in ethanol. To study the mechanism for this phenomenon, fresh and used catalysts were analyzed by characterization techniques including scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and energy dispersive X-ray spectrometer (EDS). It was found that the deactivation of Pd/C catalyst caused by the gradual accumulation of NaBr could be recovered by washing with water. On the basis of these studies, an effective and practical system for the combined method of SE and catalytic HDB over Pd/C was developed to dispose BFRs contaminated soils.
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Affiliation(s)
- Heng Su
- The Institute for Advanced Study of Coastal Ecology, Ludong University, Yantai, 264025, China; School of Resources and Environmental Engineering, Ludong University, Yantai, 264025, China
| | - Peng Li
- School of Resources and Environmental Engineering, Ludong University, Yantai, 264025, China
| | - Yanfei Wang
- School of Resources and Environmental Engineering, Ludong University, Yantai, 264025, China
| | - Haiyang Wu
- School of Resources and Environmental Engineering, Ludong University, Yantai, 264025, China
| | - Xuanxuan Ma
- School of Resources and Environmental Engineering, Ludong University, Yantai, 264025, China; Fujian Provincial Colleges and University Engineering Research Center of Solid Waste Resource Utilization, Longyan University, Longyan, 364012, China
| | - Ying Liu
- School of Resources and Environmental Engineering, Ludong University, Yantai, 264025, China
| | - Yunbo Ma
- The Institute for Advanced Study of Coastal Ecology, Ludong University, Yantai, 264025, China; School of Resources and Environmental Engineering, Ludong University, Yantai, 264025, China
| | - Sujing Liu
- School of Resources and Environmental Engineering, Ludong University, Yantai, 264025, China.
| | - Chuanhai Xia
- The Institute for Advanced Study of Coastal Ecology, Ludong University, Yantai, 264025, China; School of Resources and Environmental Engineering, Ludong University, Yantai, 264025, China.
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13
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Ecological and Health Risk Assessment of Heavy Metals in Soils from Recycled Lead Smelting Sites. WATER 2022. [DOI: 10.3390/w14091445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
In this study, 258 soil samples were collected to determine the total content and each speciation fraction of chromium (Cr), manganese (Mn), copper (Cu), zinc (Zn), cadmium (Cd), and lead (Pb) in the soil by inductively coupled plasma mass spectrometry (ICP-MS), and their potential ecological and human health risks were assessed using the geo-accumulation index (Igeo), risk assessment code (RAC), and health risk assessment. The results showed that: (1) The mean concentrations of heavy metals (HMs) (mg/kg) in the surface soil of the site were in the order of Pb (1921.77) > Mn (598.21) > Zn (162.29) > Cr (84.65) > Cu (15.16) > Cd (1.8), with the mean values of Cd and Pb exceeding the local background values by 164 and 725 times. (2) In the vertical direction, Cr, Mn, and Pb have no tendency to migrate downward; Cd and Zn demonstrate a strong ability to migrate. (3) The bioavailability of Cd is the highest in the surface soil, followed by Mn and Pb; in the soil below a depth of 0.5 m, the prevalent form of HMs is its residual state (F4). (4) The degree of Igeo pollution of each HMs is: Pb > Cd > Zn > Cr = Mn = Cu, where Pb pollutes the environment to an extremely contaminated level and Cd causes heavy pollution thereof. According to the RAC results, Cd in the surface soil poses a high risk to the environment, and Pb and Mn pose a moderate risk; meanwhile, with the increase of depth, the risk posed by Cd and Mn to the ecosystem shows a tendency to increase. Health risk evaluation indicated that respiratory intake was the main pathway affecting the carcinogenic risk (CR) and hazard quotient (HQ) of HMs, where Pb and Cr were the main hazard factors for non-CR and Cr was the main carcinogenic factor. This study can provide scientific guidance and technical support for soil risk control or remediation of HM-contaminated sites.
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14
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Lamontagne J, Sas E, Vincent G, Shang K, Pitre FE, Labrecque M. Valuable alkaloids content is preserved in Camptotheca acuminata and Morus alba grown in trace elements contaminated soil. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2022; 24:1533-1542. [PMID: 35234104 DOI: 10.1080/15226514.2022.2043238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Phytoextraction of trace elements (TE) using woody species is an economically challenging soil remediation approach because of the long time needed. Yet, some trees contain alkaloids that can be exploited along structural components to enhance biomass value. As alkaloids are thought to be involved in plant defence mechanisms, we hypothesized that potentially hostile phytoremediation conditions could increase their level. Camptothecin in Camptotheca acuminata and 1-deoxynojirimycin in Morus alba were measured from trees grown in a field in presence of Cu, Pb and Zn all together, and from M. alba grown in a greenhouse in presence of Cd or other abiotic stressors (NaCl and bending). The trees did not extract TE in the field, but M. alba stems accumulated Cd in the greenhouse experiment, with no consequence on stomatal conductance and leaves pigments concentration. Camptothecin and 1-deoxynojirimycin concentrations were preserved under all experimental conditions, as was biomass yield, and phenolics were slightly increased in M. alba exposed to TE. This study provides evidence that valuable and persistent alkaloids and phenolics can be extracted from trees facing phytoremediation-associated stresses, without a negative impact on their quantity and on biomass yield. Such products could generate a sustainable stream of revenues during phytoremediation.
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Affiliation(s)
- Julien Lamontagne
- Institut de recherche en biologie végétale, Université de Montréal, Montréal, Canada
| | - Eszter Sas
- Institut de recherche en biologie végétale, Université de Montréal, Montréal, Canada
| | - Gilles Vincent
- Institut de recherche en biologie végétale, Université de Montréal, Montréal, Canada
- Shanghai Chenshan Botanical Garden, Shanghai, China
| | - Kankan Shang
- Institut de recherche en biologie végétale, Université de Montréal, Montréal, Canada
- Shanghai Chenshan Botanical Garden, Shanghai, China
| | - Frédéric E Pitre
- Institut de recherche en biologie végétale, Université de Montréal, Montréal, Canada
- Montréal Botanical Garden, Montréal, Canada
| | - Michel Labrecque
- Institut de recherche en biologie végétale, Université de Montréal, Montréal, Canada
- Montréal Botanical Garden, Montréal, Canada
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Zhang H, Zhang Y, Zhong Y, Ding J. Novel strategies for 2,8-dichlorodibenzo-p-dioxin degradation using ternary Au-modified iron doped TiO 2 catalysts under UV-vis light illumination. CHEMOSPHERE 2022; 291:132826. [PMID: 34774912 DOI: 10.1016/j.chemosphere.2021.132826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 10/25/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
Polychlorinated dibenzo-p-dioxins (PCDDs), characterized by their extreme toxicity, high persistency and bioaccumulation, regard as one of the most concerned environmental pollutants on the priority list. In this study, microwave-hydrothermal and photoreduction methods were adopted for fabrication of ternary Au@Fe/TiO2 composites for removal of 2,8-dichlorodibenzo-p-dioxin (2,8-DCDD) under UV-Vis light irradiation. The acquired materials were characterized and analyzed by XRD, TEM, XPS, UV-Vis DRS, PL, etc. As a result, the 1%Au@1%Fe/TiO2 exhibited much higher photocatalytic activity that 96.3% of 2,8-DCDD was removed within 160 min with respect to that of Fe/TiO2 (3.0 times) and TiO2 (5.5 times). It revealed the active substances might be produced, which were verified by ESR analysis. In a comparison, the 1%Au@1%Fe/TiO2 also exhibited high activity in that 97.2% of 2,8-DCDD was removed within 240 min under an anoxic atmosphere. The 1%Au@1%Fe/TiO2 systems were all pH-dependent that 2,8-DCDD could be fully degraded in neutral conditions. The results of repeatability on 1%Au@1%Fe/TiO2 showed that the sample was high stability. Fe doping improved the charge separation of TiO2 and Au modification improved the activity via SPR effect and Mott-Schottky barrier. The degradation mechanisms and pathways were proposed and discussed in detail. The current work develops a new approach on photocatalytic oxidation and reductive dechlorination of dioxins and may open a new opportunity to extend the application range of TiO2 catalysts.
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Affiliation(s)
- Hangjun Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, 310018, Hangzhou, Zhejiang, China
| | - Yinan Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, 310018, Hangzhou, Zhejiang, China
| | - Yuchi Zhong
- College of Life and Environmental Sciences, Hangzhou Normal University, 310018, Hangzhou, Zhejiang, China
| | - Jiafeng Ding
- College of Life and Environmental Sciences, Hangzhou Normal University, 310018, Hangzhou, Zhejiang, China.
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16
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Graphite particles as third electrodes to enhance metal removal and energy saving in a stationary electrodialytic soil system. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.139896] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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17
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Recent advances in adsorptive removal and catalytic reduction of hexavalent chromium by metal–organic frameworks composites. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118274] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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18
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Application of Deinococcus radiodurans in the treatment of environmental pollution by heavy metals and radionuclides. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-021-08141-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Tran HT, Lin C, Hoang HG, Bui XT, Le VG, Vu CT. Soil washing for the remediation of dioxin-contaminated soil: A review. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126767. [PMID: 34396961 DOI: 10.1016/j.jhazmat.2021.126767] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 07/14/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
Dioxin-contaminated soil has attracted worldwide attention due to its potential negative impacts on human health and the ecosystem. Thus, technological development aiming at high treatment efficiency and low cost for dioxin-contaminated soil is largely needed. In this review, approximately 200 documents were involved to summarize up-to-date scientific achievements of soil washing technology for the remediation of dioxin-contaminated soil. The mechanisms, advantages, and limitations of physical separation techniques (e.g. mechanical stirring, mechanical shaking, ultrasonication, and froth flotation) and washing solutions (e.g. organic solvents, edible oils, and surfactants) used for chemical extraction were comprehensively reviewed. Froth flotation is very promising for field-scale soil washing, whereas organic solvents show high removal efficiencies (up to 99%) of dioxins from contaminated soil. Further, the combination of physical separation and chemical extraction can help enhance dioxin removal efficiency (from 1.5 to 2 times), reducing energy consumption and cost (about 2 times). Among available remediation technologies for dioxin-contaminated soil, soil washing is truly promising since it has shown high removal efficiency (66-99% different remediation scales) with reasonable cost (46 - 250 USD per metric ton). However, the washed solution and volatile organic compounds generated during the process remain a concern and should be addressed in future research.
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Affiliation(s)
- Huu Tuan Tran
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan, ROC
| | - Chitsan Lin
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan, ROC.
| | - Hong Giang Hoang
- Faculty of Health Sciences and Finance - Accounting, Dong Nai Technology University, Bien Hoa, Dong Nai 76100, Viet Nam
| | - Xuan Thanh Bui
- Key Laboratory of Advanced Waste Treatment Technology, Vietnam National University Ho Chi Minh (VNU-HCM), Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Viet Nam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam
| | - Van Giang Le
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan, ROC
| | - Chi Thanh Vu
- Civil and Environmental Engineering Department, University of Alabama in Huntsville, Huntsville, AL 35899, United States
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Xu L, Zhang J, Barnie S, Zhang H, Liu F, Chen H. New insight into the adsorption mechanism of PCP by humic substances with different degrees of humification in the presence of Cr(VI). CHEMOSPHERE 2021; 284:131223. [PMID: 34182284 DOI: 10.1016/j.chemosphere.2021.131223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 06/04/2021] [Accepted: 06/11/2021] [Indexed: 06/13/2023]
Abstract
Humic substances (HSs) have great retention effects on pentachlorophenol (PCP) migration in subsurface environment, but the adsorption mechanism of PCP by HSs with various aromatic/aliphatic moieties and acidic functional groups in the presence of Cr(VI) is still unclear. In this study, the adsorption mechanism of PCP by undissolved humic acid (HA) and humin (HM) extracted from peat, black soil, lignite and coal was investigated under the presence of Cr(VI). According to the results, HA samples had much lower adsorption capacity for hydrophobic PCP than HM samples due to their higher contents of hydrophilic polar oxygen-containing functional groups. In respect to PCP adsorption mechanism, the molecular unsaturation of HSs associated with humification degree was found to be the determinant instead of polarity. Notably, after reacting with Cr(VI), significant decreasing of PCP adsorption quantities occurred on HSs extracted from lignite and coal with higher degrees of unsaturation (H/C < 0.64), while HSs extracted from peat and black soil with lower degrees of unsaturation (H/C > 0.83) kept almost unchanged, which can be attributed to the much higher reactivity of aromatic domains of HSs for Cr(VI) reduction compared with aliphatic moieties. This indicated that the adsorption mechanism of PCP by HSs with higher and lower degrees of unsaturation might be respectively driven by π-π interaction and hydrophobic interaction. This study highlighted the diverse adsorption mechanisms of PCP on HSs with different degrees of humification, and emphasized the coexisting Cr(VI) only have significant effect on PCP adsorption by HSs with higher humification degrees instead of the lower ones.
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Affiliation(s)
- Lin Xu
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, 100083, China; Northwest Engineering Corporation Limited, Xi'an, 710065, China
| | - Jia Zhang
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, 100083, China.
| | - Samuel Barnie
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, 100083, China; Department of Water and Sanitation, University of Cape Coast, Cape Coast, Ghana
| | - Hui Zhang
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, 100083, China
| | - Fei Liu
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, 100083, China
| | - Honghan Chen
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, 100083, China
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21
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Lee D, Son Y. Ultrasound-assisted soil washing processes using organic solvents for the remediation of PCBs-contaminated soils. ULTRASONICS SONOCHEMISTRY 2021; 80:105825. [PMID: 34775161 PMCID: PMC8593648 DOI: 10.1016/j.ultsonch.2021.105825] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 10/20/2021] [Accepted: 11/03/2021] [Indexed: 05/12/2023]
Abstract
Ultrasonic soil washing processes using organic solvents were investigated for the development of novel remediation technologies for persistent organic pollutants (POPs)- contaminated soils. Aluminum foil erosion was first tested to understand sonophysical activity in water, methanol (polar) and n-hexane (nonpolar) in a 28 kHz double-bath-type sonoreactor. Significant sonophysical damage on the aluminum foil was observed at the antinodes for all solvents, and the order of degree of sonophysical damage was as follows: water > methanol > n-hexane. Subsequently, conventional (mechanical mixing only) and ultrasonic soil washing (mechanical mixing and ultrasound) techniques were compared for the removal of polychlorinated biphenyls (PCBs) from soil. Two types of contaminated soils, fresh (Soil A, C0 = 2.5 mg/kg) and weathered (Soil B, C0 = 0.5 mg/kg), were used and the applied soil-to-liquid (S:L) ratio was 1:5 and 1:10 for methanol and n-hexane, respectively. The polar solvent significantly increased washing efficiencies compared to the nonpolar solvent, despite the nonpolar nature of the PCBs. Washing efficiency was significantly enhanced in ultrasonic soil washing compared to conventional washing, owing to macro- and micro-scale sonophysical actions. The highest washing efficiencies of 90% for Soil A and 70% for Soil B were observed in the ultrasonic washing processes using methanol. Additionally, a single operation of the ultrasonic washing process was superior to two sequential processes with conventional mixing in terms of washing efficiency, consumption of washing agents, treatment of washing leachate, and operation time. Finally, the removal of PCBs in an organic solvent (methanol) was investigated in photolytic and sonolytic processes for the post-treatment of soil washing leachate. A photolysis efficiency of 80% was obtained within 60 min of UV exposure for intensities of 1.0, 2.0, and 4.0 W/cm2. The primary mechanism of PCBs degradation is photolytic dechlorination. In contrast, no degradation was detected in the sonolytic process, as the excess organic solvent acted as a strong radical scavenger.
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Affiliation(s)
- Dukyoung Lee
- Department of Environmental Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea; Department of Energy Engineering Convergence, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
| | - Younggyu Son
- Department of Environmental Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea; Department of Energy Engineering Convergence, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea.
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22
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Yavari S, Courchesne F, Brisson J. Nutrient-assisted phytoremediation of wood preservative-contaminated technosols with co-planting of Salix interior and Festuca arundinacea. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:58018-58034. [PMID: 34101122 DOI: 10.1007/s11356-021-14076-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 04/19/2021] [Indexed: 06/12/2023]
Abstract
The remediation of wood preservative-contaminated sites is an important issue due to the carcinogenic nature of some contaminants derived from wood preservatives (e.g., Cr+6, arsenate, and pentachlorophenol). This study evaluated the effects of fertilizer application on remediation potential of co-plantings of Salix interior Rowlee. (Salix) and Festuca arundinacea Schreb. (Festuca) in a wood preservative-spiked technosol while considering the potential contaminant and nutrient leaching. Two levels of nitrogen (N) and phosphorus (P) fertilizers, NaNO3 and NaH2PO4 (25 and 75 mg L-1), were applied to achieve three N:P ratios, i.e., 3:1 (75:25), 1:3 (25:75), and 1:1 (25:25), that were compared with a control treatment (0:0 N:P) in a mesocosm experiment. Roots of the plant supplied with 1:1 and 1:3 N:P had more than double arsenic (As) and copper (Cu) amounts (i.e., biomass × concentration) compared to the control ones. Highest As and Cu amounts in shoots were found for Salix stems and Festuca leaves in the 1:3 and 1:1 N:P treatments, respectively. Arsenic and P leaching was high in mesocosms supplied with 1:3 N:P. Contamination and nutrient leaching in the 1:1 N:P treatment did not differ from the control, except for Cu. In conclusion, 1:1 N:P treatment yielded the best results in terms of metal(loid) uptake and contaminant and nutrient leaching. In 1:1 N:P treatment, the maximum values of percent As, Cr, and Cu in Salix and Festuca aboveground were 0.18%, 0.024%, and 1.20% and 0.89%, 0.08%, and 1.78%, respectively.
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Affiliation(s)
- Sara Yavari
- Institut de recherche en biologie végétale, Département de Sciences biologiques, Université de Montréal, 4101 Sherbrooke St E, Montreal, Quebec, H1X 2B2, Canada.
| | - François Courchesne
- Département de géographie, Université de Montréal, Complexe des sciences, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada
| | - Jacques Brisson
- Institut de recherche en biologie végétale, Département de Sciences biologiques, Université de Montréal, 4101 Sherbrooke St E, Montreal, Quebec, H1X 2B2, Canada
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Dinu MV, Humelnicu D, Lazar MM. Analysis of Copper(II), Cobalt(II) and Iron(III) Sorption in Binary and Ternary Systems by Chitosan-Based Composite Sponges Obtained by Ice-Segregation Approach. Gels 2021; 7:gels7030103. [PMID: 34449618 PMCID: PMC8395943 DOI: 10.3390/gels7030103] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/21/2021] [Accepted: 07/22/2021] [Indexed: 01/24/2023] Open
Abstract
With the intensive industrial activity worldwide, water pollution by heavy metal ions (HMIs) has become a serious issue that requires strict and careful monitoring, as they are extremely toxic and can cause serious hazards to the environment and human health. Thus, the effective and efficient removal of HMIs still remains a challenge that needs to be solved. In this context, copper(II), cobalt(II) and iron(III) sorption by chitosan (CS)-based composite sponges was systematically investigated in binary and ternary systems. The composites sponges, formed into beads, consisting of ethylenediaminetetraacetic acid (EDTA)- or diethylenetriaminepentaacetic acid (DTPA)-functionalized CS, entrapping a natural zeolite (Z), were prepared through an ice-segregation technique. The HMI sorption performance of these cryogenically structured composite materials was assessed through batch experiments. The HMI sorption capacities of CSZ-EDTA and CSZ-DTPA composite sponges were compared to those of unmodified sorbents. The Fe(III) ions were mainly taken up when they were in two-component mixtures with Co(II) ions at pH 4, whereas Cu(II) ions were preferred when they were in two-component mixtures with Co(II) ions at pH 6. The recycling studies indicated almost unchanged removal efficiency for all CS-based composite sorbents even after the fifth cycle of sorption/desorption, supporting their remarkable chemical stability and recommending them for the treatment of HMI-containing wastewaters.
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Affiliation(s)
- Maria Valentina Dinu
- “Mihai Dima” Department of Functional Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania;
- Correspondence:
| | - Doina Humelnicu
- Faculty of Chemistry, “Al. I. Cuza” University of Iasi, Carol I Bd. 11, 700506 Iasi, Romania;
| | - Maria Marinela Lazar
- “Mihai Dima” Department of Functional Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania;
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Amine Laadila M, LeBihan Y, Caron RF, Vaneeckhaute C. Construction, renovation and demolition (CRD) wastes contaminated by gypsum residues: Characterization, treatment and valorization. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 120:125-135. [PMID: 33302015 DOI: 10.1016/j.wasman.2020.11.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 11/05/2020] [Accepted: 11/07/2020] [Indexed: 06/12/2023]
Abstract
Management of wastes resulting from construction, renovation and demolition (CRD) activities has become an important challenge for scientists. The recovery of gypsum residues from CRD waste is one of the solutions to minimize the impact of CRD operations on the environment. This review discusses the characteristics of CRD waste, different treatment and valorization methods for both CRD waste and extracted gypsum residues. Pre-treatment based on particle size separation is the most fundamental step in the process of extracting gypsum residues from CRD fine tailings. The subsequent application of a physical, chemical or biological decontamination approach on the gypsum residues could significantly improve its quality as compared to natural gypsum. The quality of the gypsum obtained affects its valorization potential in different sectors such as cement manufacturing, the sequestration of carbon dioxide and nutrients. The valorization strategy could help reducing emissions of greenhouse gases while producing by-products that can be reused in agriculture. As such, this review may provide guidance for more sustainable management of CRD and gypsum residues in the future.
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Affiliation(s)
- Mohamed Amine Laadila
- BioEngine, Research Team on Green Process Engineering and Biorefineries, Chemical Engineering Department, Laval University, 1065 avenue de la Médecine, Québec, QC G1V0A6, Canada; Investissement Québec-CRIQ, 333 Rue Franquet, Québec, QC G1P 4C7, Canada.
| | - Yann LeBihan
- Investissement Québec-CRIQ, 333 Rue Franquet, Québec, QC G1P 4C7, Canada.
| | | | - Céline Vaneeckhaute
- BioEngine, Research Team on Green Process Engineering and Biorefineries, Chemical Engineering Department, Laval University, 1065 avenue de la Médecine, Québec, QC G1V0A6, Canada.
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Demers E, Kõiv-Vainik M, Yavari S, Mench M, Marchand L, Vincent J, Frédette C, Comeau Y, Brisson J. Macrophyte Potential to Treat Leachate Contaminated with Wood Preservatives: Plant Tolerance and Bioaccumulation Capacity. PLANTS 2020; 9:plants9121774. [PMID: 33327610 PMCID: PMC7765096 DOI: 10.3390/plants9121774] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/24/2020] [Accepted: 12/10/2020] [Indexed: 01/31/2023]
Abstract
Pentachlorophenol and chromated copper arsenate (CCA) have been used worldwide as wood preservatives, but these compounds can toxify ecosystems when they leach into the soil and water. This study aimed to evaluate the capacity of four treatment wetland macrophytes, Phalaris arundinacea, Typha angustifolia, and two subspecies of Phragmites australis, to tolerate and treat leachates containing wood preservatives. The experiment was conducted using 96 plant pots in 12 tanks filled with three leachate concentrations compared to uncontaminated water. Biomass production and bioaccumulation were measured after 35 and 70 days of exposure. There were no significant effects of leachate contamination concentration on plant biomass for any species. No contaminants were detected in aboveground parts of the macrophytes, precluding their use for phytoextraction within the tested contamination levels. However, all species accumulated As and chlorinated phenols in belowground parts, and this accumulation was more prevalent under a more concentrated leachate. Up to 0.5 mg pentachlorophenol/kg (from 81 µg/L in the leachate) and 50 mg As/kg (from 330 µg/L in the leachate) were accumulated in the belowground biomass. Given their high productivity and tolerance to the contaminants, the tested macrophytes showed phytostabilization potential and could enhance the degradation of phenols from leachates contaminated with wood preservatives in treatment wetlands.
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Affiliation(s)
- Emmanuelle Demers
- Département de Sciences Biologiques, Institut de Recherche en Biologie Végétale, Université de Montréal, 4101 Sherbrooke East, Montreal, QC H1X 2B2, Canada; (E.D.); (S.Y.); (J.V.); (C.F.); (J.B.)
| | - Margit Kõiv-Vainik
- Département de Sciences Biologiques, Institut de Recherche en Biologie Végétale, Université de Montréal, 4101 Sherbrooke East, Montreal, QC H1X 2B2, Canada; (E.D.); (S.Y.); (J.V.); (C.F.); (J.B.)
- Department of Geography, Institute of Ecology and Earth Sciences, University of Tartu, 46 Vanemuise St., 51003 Tartu, Estonia
- Correspondence: ; Tel.: +372-737-6843
| | - Sara Yavari
- Département de Sciences Biologiques, Institut de Recherche en Biologie Végétale, Université de Montréal, 4101 Sherbrooke East, Montreal, QC H1X 2B2, Canada; (E.D.); (S.Y.); (J.V.); (C.F.); (J.B.)
| | - Michel Mench
- University of Bordeaux, INRAE, BIOGECO UMR, 1202, Bat B2, Allée G. St-Hilaire, 33615 Pessac, France;
| | - Lilian Marchand
- SUEZ-Le LyRE, Research and Innovation Center, 15 Avenue Léonard de Vinci, 33600 Pessac, France;
| | - Julie Vincent
- Département de Sciences Biologiques, Institut de Recherche en Biologie Végétale, Université de Montréal, 4101 Sherbrooke East, Montreal, QC H1X 2B2, Canada; (E.D.); (S.Y.); (J.V.); (C.F.); (J.B.)
| | - Chloé Frédette
- Département de Sciences Biologiques, Institut de Recherche en Biologie Végétale, Université de Montréal, 4101 Sherbrooke East, Montreal, QC H1X 2B2, Canada; (E.D.); (S.Y.); (J.V.); (C.F.); (J.B.)
| | - Yves Comeau
- Department of Civil, Geological and Mining Engineering, Polytechnique Montréal, 2500 Polytechnique Road, Montreal, QC H3T 1J4, Canada;
| | - Jacques Brisson
- Département de Sciences Biologiques, Institut de Recherche en Biologie Végétale, Université de Montréal, 4101 Sherbrooke East, Montreal, QC H1X 2B2, Canada; (E.D.); (S.Y.); (J.V.); (C.F.); (J.B.)
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Zhou W, Zhang L, Wu P, Liu Y, Cai Y, Zhao X. An effective method for improving the permeation flux of a ceramic membrane: Single-matrix spherical ceramic membrane. JOURNAL OF HAZARDOUS MATERIALS 2020; 400:123183. [PMID: 32580095 DOI: 10.1016/j.jhazmat.2020.123183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 06/06/2020] [Accepted: 06/08/2020] [Indexed: 06/11/2023]
Abstract
A single-matrix hydrophobic ceramic membrane (HCM) was prepared via gel-casting and membrane grafting. Fly ash cenospheres and 1H,1H,2H,2H-perfluorooctyl trichlorosilane were used as the single-matrix material. The results showed that when the sintering temperature was 1300℃, the porosity was 75.56 %, and flexural strength was 11.1 MPa; this means that the material meets the requirements for mechanical properties. After grafting 1H,1H,2H,2H-perfluorooctane trichlorosilane, the Si-CH3 peak increased and the Si-OH peak was weaker. Also, the contact angle of the droplet increased from 56° to 126°, and this indicates that the droplet was successfully chemically adsorbed to the surface of the ceramic membrane. The results of computational fluid dynamics simulation show that a gaussian spherical wall greatly improved the permeation flux of foamed ceramic membranes, and the permeation flux of the microchannel increased by 26.5 %∼76.2 % at the same transmembrane pressure. Pure water permeation flux and heavy metal adsorption experiments shows excellent high permeation flux and satisfactory heavy metal adsorption performance of HCM. From the perspective of membrane cost, HCM is suitable to be promoted. In summary, HCM has the potential for commercial application.
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Affiliation(s)
- Wei Zhou
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, PR China; College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Lin Zhang
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Pute Wu
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
| | - Ying Liu
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, PR China; College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Yaohui Cai
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Xiao Zhao
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, PR China; College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
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Lachapelle A, Yavari S, Pitre FE, Courchesne F, Brisson J. Co-planting of Salix interior and Trifolium pratense for phytoremediation of trace elements from wood preservative contaminated soil. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2020; 23:632-640. [PMID: 33222513 DOI: 10.1080/15226514.2020.1847034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Phytoextraction potential of a co-planting system was evaluated using a shrub and an herbaceous species and compared with monocultures. A greenhouse experiment with Salix interior and Trifolium pratense grown in combination or alone was conducted for 120 days in soil either uncontaminated or contaminated with wood preservatives containing mixed chromated copper arsenate and pentachlorophenol (PCP). The results showed that the plant species produced similar amounts of dry biomass per pot in monoculture and co-planting, whether growing in contaminated or uncontaminated soil. Arsenic (As), chromium (Cr) and copper (Cu) concentrations in root tissue of S. interior increased 8.6%, 65.9% and 4.5%, respectively, in co-planting compared to its monoculture. T. pratense had superior concentration of As (14% higher) in root tissue when co-planted. However, the higher trace elements concentrations in the plant tissues did not translate into measurable differences in total trace element removal per pot, except for As. The bioconcentration factor for Cu and As was high in the belowground portions of the plants in co-planting. PCP levels in the soil decreased to values near the limit of detection in all treatments. These results suggest that co-planting S. interior with T. pratense could lead to higher phytoextraction potential than monoculture.
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Affiliation(s)
- Anne Lachapelle
- Département de Sciences Biologiques, Institut de Recherche en Biologie Végétale, Université de Montréal, Montréal, Canada
| | - Sara Yavari
- Département de Sciences Biologiques, Institut de Recherche en Biologie Végétale, Université de Montréal, Montréal, Canada
| | - Frédéric E Pitre
- Département de Sciences Biologiques, Institut de Recherche en Biologie Végétale, Université de Montréal, Montréal, Canada
| | | | - Jacques Brisson
- Département de Sciences Biologiques, Institut de Recherche en Biologie Végétale, Université de Montréal, Montréal, Canada
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Kim N, Seo JH, Yun YS, Park D. New insight into continuous recirculation-process for treating arsenate using bacterial biosorbent. BIORESOURCE TECHNOLOGY 2020; 316:123961. [PMID: 32795871 DOI: 10.1016/j.biortech.2020.123961] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 07/29/2020] [Accepted: 08/02/2020] [Indexed: 06/11/2023]
Abstract
In this study, a new recirculation column reactor system for arsenate removal using a polyethylenimine coated bacterial biosorbent was developed. Solution pH was the most important factor in process design and operation. In order to control and optimize solution pH favorable for arsenate removal, a pH control and recirculation system was added to a column reactor. The effects of recycle ratio, initial arsenate concentration, and flow rate on the arsenate removal performance of the developed process were examined. Thomas and Yoon-Nelson models were used to interpret the breakthrough curve of arsenate removal. The maximum arsenate adsorption amount of the new reactor was determined to be 50.86 mg/g by the Thomas model. Importantly, the new reactor showed unimpeded adsorption performance compared with that in the batch experiments. The desorption study also showed excellent reusability. The results indicated that the newly developed process could be a promising application prospect for removing arsenate.
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Affiliation(s)
- Namgyu Kim
- Department of Environmental Engineering, Yonsei University, 1 Yonseidae-gil, Wonju 26493, Republic of Korea
| | - Ji Hae Seo
- Department of Environmental Engineering, Yonsei University, 1 Yonseidae-gil, Wonju 26493, Republic of Korea
| | - Yeoung-Sang Yun
- Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University, 567 Baekje-daero, Jeounju 54896, Republic of Korea
| | - Donghee Park
- Department of Environmental Engineering, Yonsei University, 1 Yonseidae-gil, Wonju 26493, Republic of Korea.
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29
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Miao D, Zhao S, Zhu K, Zhang P, Wang T, Jia H, Sun H. Activation of persulfate and removal of ethyl-parathion from soil: Effect of microwave irradiation. CHEMOSPHERE 2020; 253:126679. [PMID: 32283425 DOI: 10.1016/j.chemosphere.2020.126679] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 03/24/2020] [Accepted: 03/31/2020] [Indexed: 06/11/2023]
Abstract
Advanced persulfate oxidation technology is widely used in organic pollution control of super fund sites. In recent years, microwave radiation has been proven a promising method for persulfate activation. However, most of the prior works were focused on the treatment of polluted water, but there are few reports aiming at contaminated sites, especially the knowledge of using microwave activated persulfate technology to repair pesticide-contaminated sites. In this study, an effective activation/oxidation method for the remediation of pesticide-contaminated soil, i.e., microwave/persulfate, was developed to treat soil containing ethyl-parathion. The concentration of persulfate, reaction temperature, and time were optimised. The results showed that up to 77.32% of ethyl-parathion was removed with the addition of 0.1 mmol·persulfate·g-1 soil under the microwave temperature of 60 °C. In comparison, 19.43% of ethyl-parathion was removed at the same reaction temperature under the condition of water bath activated persulfate. Electron paramagnetic resonance (EPR) spectroscopy combined with spin-trapping technology was used to detect reactive oxidation species, and OH and SO4- were observed in the microwave/persulfate system. Quenching experiments suggested that ethyl-parathion was degraded by the generated OH and SO4-. Paraoxon, phenylphosphoric acid, 4-nitrophenol, dimethyl ester phosphate, and some alkanes were the dominant oxidative products identified by gas chromatography-mass spectrometry (GC-MS) analysis. A possible pathway for ethyl-parathion degradation was proposed in this study. The results obtained serve as the guidance to the development of remediation technologies involving persulfate and microwave for soil contaminated by organic contaminants such as pesticides.
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Affiliation(s)
- Duo Miao
- Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A & F University, Yangling, 712100, China
| | - Song Zhao
- Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A & F University, Yangling, 712100, China
| | - Kecheng Zhu
- Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A & F University, Yangling, 712100, China
| | - Peng Zhang
- Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, PR China
| | - Tiecheng Wang
- Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A & F University, Yangling, 712100, China
| | - Hanzhong Jia
- Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A & F University, Yangling, 712100, China.
| | - Hongwen Sun
- Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, PR China
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Monfort O, Usman M, Hanna K. Ferrate(VI) oxidation of pentachlorophenol in water and soil. CHEMOSPHERE 2020; 253:126550. [PMID: 32272307 DOI: 10.1016/j.chemosphere.2020.126550] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/13/2020] [Accepted: 03/17/2020] [Indexed: 06/11/2023]
Abstract
Although the use of ferrate (VI), an emerging green oxidant, has been widely investigated to remove organic pollutants in water, its ability to remediate contaminated soils has been scarcely evaluated. Here, we explore the use of ferrate (VI) to degrade a polychlorinated persistent compound, the pentachlorophenol (PCP), in aqueous solution and in an aged contaminated soil under batch, water-saturated and water-unsaturated flow conditions. The first results showed the prominent efficiency of ferrate (VI) over conventional oxidants (e.g. H2O2 and persulfate) in both matrices and at different oxidant doses. In aqueous solution, more than 80% of PCP was degraded by ferrate (VI) while complete removal was observed in soil under batch conditions. In column experiments, PCP removal by ferrate (VI) remained efficient but dependent on the flow rate and water saturation. Maximum PCP removal (95%) in columns was observed under water saturated conditions when ferrate (VI) (0.2 g g-1 of soil) was injected at a low flow rate (i.e. 0.025 mL min-1). This study has strong implications in the development of new sustainable processes based on ferrate (VI) for the remediation of different environmental compartments.
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Affiliation(s)
- Olivier Monfort
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000, Rennes, France; Comenius University in Bratislava, Faculty of Natural Sciences, Department of Inorganic Chemistry, Ilkovicova 6, Mlynska Dolina, 84215, Bratislava, Slovakia.
| | - Muhammad Usman
- Environmental Mineralogy, Center for Applied Geosciences, University of Tübingen, 72074, Tübingen, Germany; PEIE Research Chair for the Development of Industrial Estates and Free Zones, Center for Environmental Studies and Research, Sultan Qaboos University, Al-Khoud 123, Muscat, Oman.
| | - Khalil Hanna
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000, Rennes, France; Institut Universitaire de France (IUF), MESRI, 1 Rue Descartes, 75231, Paris, France
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Sörengård M, Lindh AS, Ahrens L. Thermal desorption as a high removal remediation technique for soils contaminated with per- and polyfluoroalkyl substances (PFASs). PLoS One 2020; 15:e0234476. [PMID: 32584848 PMCID: PMC7316335 DOI: 10.1371/journal.pone.0234476] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 05/26/2020] [Indexed: 01/10/2023] Open
Abstract
Soils contaminated with per- and polyfluoroalkyl substances (PFASs) are an important source for impacting drinking water delivery systems and surface water bodies world-wide, posing an urgent risk to human health and environmental quality. However, few treatment techniques have been tested for PFAS-contaminated soil hotspots. This study investigated the possibility of thermal desorption as a possible technique to remediate soils contaminated with multiple PFASs. Two fortified soils (∑9PFAS ≈ 4 mg kg-1) and one field-contaminated soil (∑9PFAS ≈ 0.025 mg kg-1) were subjected to a 75-min thermal treatment at temperatures ranging from 150 to 550°C. Soil concentrations of PFASs showed a significant decrease at 350°C, with the ∑9PFAS concentration decreasing by, on average, 43% and 79% in the fortified and field contaminated soils, respectively. At 450°C, >99% of PFASs were removed from the fortified soils, while at 550°C the fraction removed ranged between 71 and 99% for the field contaminated soil. In the field contaminated soil, PFAS classes with functional groups of sulfonates (PFSAs) and sulfonamides (FOSAs) showed higher removal than the perfluoroalkyl carboxylates (PFCAs). Thus thermal desorption has the potential to remove a wide variety of PFASs from soil, although more studies are needed to investigate the cost-effectiveness, creation of transformation products, and air-phase vacuum filtration techniques.
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Affiliation(s)
- M. Sörengård
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden
- * E-mail:
| | - A-S. Lindh
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden
| | - L. Ahrens
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden
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Souza LRR, Pomarolli LC, da Veiga MAMS. From classic methodologies to application of nanomaterials for soil remediation: an integrated view of methods for decontamination of toxic metal(oid)s. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:10205-10227. [PMID: 32064582 DOI: 10.1007/s11356-020-08032-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 02/10/2020] [Indexed: 06/10/2023]
Abstract
Soil pollution with toxic elements is a recurrent issue due to environmental disasters, fossil fuel burning, urbanization, and industrialization, which have contributed to soil contamination over the years. Therefore, the remediation of toxic metals in soil is always an important topic since contaminated soil can affect the environment, agricultural safety, and human health. Many remediation methods have been developed; however, it is essential to ensure that they are safe, and also take into account the limitation of each methodology (including high energy input and generation of residues). This scenario has motivated this review, where we explore soil contamination with arsenic, lead, mercury, and chromium and summarize information about the methods employed to remediate each of these toxic elements such as phytoremediation, soil washing, electrokinetic remediation, and nanoparticles besides elucidating some mechanisms involved in the remediation. Considering all the discussed techniques, nowadays, different techniques can be combined together in order to improve the efficiency of remediation besides the new approach of the techniques and the use of one technique for remediating more than one contaminant.
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Ding J, Lu S, Shen L, Yan R, Zhang Y, Zhang H. Enhanced photocatalytic reduction for the dechlorination of 2-chlorodibenzo-p-dioxin by high-performance g-C 3N 4/NiO heterojunction composites under ultraviolet-visible light illumination. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121255. [PMID: 31590087 DOI: 10.1016/j.jhazmat.2019.121255] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 09/11/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
Polychlorinated dibenzo-p-dioxins (PCDDs), characterized by their high persistency and bioaccumulation, are widely detected in the environment. In this study, high-performance g-C3N4/NiO heterojunctions were fabricated to degrade 2-chlorodibenzo-p-dioxin (2-CDD) under ultraviolet-visible (UV-vis) light illumination. Experiments revealed that the pure g-C3N4 and range of g-C3N4/NiO heterojunctions were synthesized by the mixing and heating method, and then were characterized by XRD, TEM, XPS and PL etc. The composites exhibited enhanced dechlorination activities under anoxic conditions. After comparison, the g-C3N4/NiO (4:6) showed optimal dechlorination performance such that 70.4% of 2-CDD was removed within 8 h and 52.3% of 2-CDD was transformed to dibenzo-p-dioxin (DD), about fourfold higher than the pristine g-C3N4. The transformation of 2-CDD was accompanied by the resale of Cl ion, and the additional oxygen was proven to be able to consume electrons and hydrogen ions, thus greatly inhibiting the degradation of PCDD in systems. The g-C3N4/NiO (4:6) can be reused at least seven times, and the mechanism was proposed in detail to promote photoinduced electrohole separation and provide active sites. This study extends the use range of g-C3N4/NiO heterojunctions and develops a new technology to degrade PCDDs with striking activity and stability.
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Affiliation(s)
- Jiafeng Ding
- College of Life and Environmental Sciences, Hangzhou Normal University, 310018, Hangzhou, Zhejiang, China
| | - Shihuan Lu
- College of Life and Environmental Sciences, Hangzhou Normal University, 310018, Hangzhou, Zhejiang, China
| | - Lilai Shen
- College of Life and Environmental Sciences, Hangzhou Normal University, 310018, Hangzhou, Zhejiang, China
| | - Ruopeng Yan
- College of Life and Environmental Sciences, Hangzhou Normal University, 310018, Hangzhou, Zhejiang, China
| | - Yinan Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, 310018, Hangzhou, Zhejiang, China
| | - Hangjun Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, 310018, Hangzhou, Zhejiang, China.
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Chen H, Awasthi SK, Liu T, Duan Y, Zhang Z, Awasthi MK. Compost biochar application to contaminated soil reduces the (im)mobilization and phytoavailability of lead and copper. JOURNAL OF CHEMICAL TECHNOLOGY & BIOTECHNOLOGY 2020; 95:408-417. [DOI: 10.1002/jctb.5986] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
Affiliation(s)
- Hongyu Chen
- College of Natural Resources and EnvironmentNorthwest A&F University Yangling China
| | - Sanjeev K Awasthi
- College of Natural Resources and EnvironmentNorthwest A&F University Yangling China
| | - Tao Liu
- College of Natural Resources and EnvironmentNorthwest A&F University Yangling China
| | - Yumin Duan
- College of Natural Resources and EnvironmentNorthwest A&F University Yangling China
| | - Zengqiang Zhang
- College of Natural Resources and EnvironmentNorthwest A&F University Yangling China
| | - Mukesh K Awasthi
- College of Natural Resources and EnvironmentNorthwest A&F University Yangling China
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Humelnicu D, Lazar MM, Ignat M, Dinu IA, Dragan ES, Dinu MV. Removal of heavy metal ions from multi-component aqueous solutions by eco-friendly and low-cost composite sorbents with anisotropic pores. JOURNAL OF HAZARDOUS MATERIALS 2020; 381:120980. [PMID: 31442692 DOI: 10.1016/j.jhazmat.2019.120980] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 08/06/2019] [Accepted: 08/07/2019] [Indexed: 05/28/2023]
Abstract
Copper, nickel, zinc, chromium, and iron ions are the prevailing contaminants in the aqueous effluents resulting from the photo-etching industry. In this context, we investigate here the metal ion sorption performance of an ion-imprinted cryogel (IIC), consisting of low-cost materials coming from renewable resources, towards multi-component metal ion solutions. The IIC sorbent, which is based on a chitosan matrix embedding a natural zeolite, was synthesized using a straightforward strategy by coupling copper-imprinting and unidirectional ice-templating methods. As consequence, the 1D-orientation and the interconnectivity of flow-channels sustain the fast metal ion diffusion within the IIC anisotropic structure. The removal efficiency of IIC sorbent reached 50% after 30 min, and the sorption equilibrium was attained within 150 min. For assessing the successful formation of imprinted cavities with well-defined sizes controlled by the radius of copper ions used as template, selectivity studies were performed on binary, ternary, and five-component synthetic mixtures. The efficiency of IIC as sorbent was further evaluated on real-life aqueous effluents discharged from photo-etching processes; thus, an IIC dosage of 6 g L-1 was found to remove 98.89% of Cu2+, 94.56% of Fe3+, 91.67% of Ni2+, 92.24% of Zn2+, and 82.76% of Cr3+ ions from this type of industrial wastewaters.
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Affiliation(s)
- Doina Humelnicu
- "Al. I. Cuza" University of Iasi, Faculty of Chemistry, Carol I Bd. 11, 700506 Iasi, Romania
| | - Maria Marinela Lazar
- "Petru Poni" Institute of Macromolecular Chemistry, "Mihai Dima" Department of Functional Polymers, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania
| | - Maria Ignat
- "Al. I. Cuza" University of Iasi, Faculty of Chemistry, Carol I Bd. 11, 700506 Iasi, Romania; "Petru Poni" Institute of Macromolecular Chemistry, "Mihai Dima" Department of Functional Polymers, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania
| | - Ionel Adrian Dinu
- "Petru Poni" Institute of Macromolecular Chemistry, "Mihai Dima" Department of Functional Polymers, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania
| | - Ecaterina Stela Dragan
- "Petru Poni" Institute of Macromolecular Chemistry, "Mihai Dima" Department of Functional Polymers, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania
| | - Maria Valentina Dinu
- "Petru Poni" Institute of Macromolecular Chemistry, "Mihai Dima" Department of Functional Polymers, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania.
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Jahan R, Bodratti AM, Tsianou M, Alexandridis P. Biosurfactants, natural alternatives to synthetic surfactants: Physicochemical properties and applications. Adv Colloid Interface Sci 2020; 275:102061. [PMID: 31767119 DOI: 10.1016/j.cis.2019.102061] [Citation(s) in RCA: 143] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 10/31/2019] [Accepted: 11/03/2019] [Indexed: 12/29/2022]
Abstract
Biosurfactants comprise a wide array of amphiphilic molecules synthesized by plants, animals, and microbes. The synthesis route dictates their molecular characteristics, leading to broad structural diversity and ensuing functional properties. We focus here on low molecular weight (LMW) and high molecular weight (HMW) biosurfactants of microbial origin. These are environmentally safe and biodegradable, making them attractive candidates for applications spanning cosmetics to oil recovery. Biosurfactants spontaneously adsorb at various interfaces and self-assemble in aqueous solution, resulting in useful physicochemical properties such as decreased surface and interfacial tension, low critical micellization concentrations (CMCs), and ability to solubilize hydrophobic compounds. This review highlights the relationships between biosurfactant molecular composition, structure, and their interfacial behavior. It also describes how environmental factors such as temperature, pH, and ionic strength can impact physicochemical properties and self-assembly behavior of biosurfactant-containing solutions and dispersions. Comparison between biosurfactants and their synthetic counterparts are drawn to illustrate differences in their structure-property relationships and potential benefits. Knowledge of biosurfactant properties organized along these lines is useful for those seeking to formulate so-called green or natural products with novel and useful properties.
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Calgaro L, Badetti E, Bonetto A, Contessi S, Pellay R, Ferrari G, Artioli G, Marcomini A. Consecutive thermal and wet conditioning treatments of sedimentary stabilized cementitious materials from HPSS® technology: Effects on leaching and microstructure. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 250:109503. [PMID: 31525699 DOI: 10.1016/j.jenvman.2019.109503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 08/02/2019] [Accepted: 08/31/2019] [Indexed: 06/10/2023]
Abstract
Soil and sediment contamination is recognised as one of the most relevant environmental problems caused by past industrial activities and unsustainable waste disposal practices, highlighting the need to develop or improve effective remediation techniques to support sustainable management strategies. In this context, the remediation of sediments dredged from the Mincio river (Italy) contaminated by mercury and heavy hydrocarbons (C12-40) was carried out by applying and implementing the High Performance Solidification/Stabilization technology, aimed at producing safe and reusable cement-based granular materials. The technology was improved by decreasing both the temperature and time of the thermal desorption treatment (from 280 to 110 °C and from 4-16 h to 70 min, respectively) and by including a wet conditioning step to the process. Temperature and time reduction allowed to diminish the degradation of the cementitious phases of the granules (usually related to the high temperatures employed in the process), while the wet conditioning step allowed to improve their mechanical properties, as well as to further reduce the leaching of contaminants. The physical-chemical properties of the granules and contaminant leaching in water were investigated by Inductively Coupled Plasma Mass and Optical Emission Spectrometry, Ultraviolet-Visible spectroscopy, Gas Chromatography, X-Ray Powder Diffraction, and Scanning Electron Microscopy, in order to identify the optimal parameters for both thermal and wet conditioning processes. The overall results showed that the use of consecutive thermal and wet conditioning treatment on sedimentary cementitious materials from the High Performance Solidification/Stabilization technology led to the removal of volatile pollutants and to the improvement of granule quality, thus providing a final material that satisfied all the Italian regulatory requirements for reuse. Therefore, the findings obtained in this study may contribute to the development of sustainable management strategies for contaminated soils and sediments, leading to their valorisation through the transformation into reusable materials.
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Affiliation(s)
- Loris Calgaro
- Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari of Venice, Via Torino 155, 30172, Venice Mestre, Italy.
| | - Elena Badetti
- Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari of Venice, Via Torino 155, 30172, Venice Mestre, Italy.
| | - Alessandro Bonetto
- Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari of Venice, Via Torino 155, 30172, Venice Mestre, Italy.
| | - Silvia Contessi
- Department of Geosciences, University of Padua, Via Gradenigo 6, 35131, Padua, Italy.
| | - Roberto Pellay
- Ingegnerie e Tecnologie Ecologiche (In.T.Ec.) s.r.l., Via Romea 8, 30034, Malcontenta di Mira, Venice, Italy.
| | | | - Gilberto Artioli
- Department of Geosciences, University of Padua, Via Gradenigo 6, 35131, Padua, Italy.
| | - Antonio Marcomini
- Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari of Venice, Via Torino 155, 30172, Venice Mestre, Italy.
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Ma F, Zhu Y, Wu B, Zhang Q, Xu D, Xu J, Wang B, Gu Q, Li F. Degradation of DDTs in thermal desorption off-gas by pulsed corona discharge plasma. CHEMOSPHERE 2019; 233:913-919. [PMID: 31340419 DOI: 10.1016/j.chemosphere.2019.05.292] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 05/26/2019] [Accepted: 05/31/2019] [Indexed: 06/10/2023]
Abstract
Thermal desorption has been widely employed to treat soils contaminated with chlorinated organics. The off-gas of thermal desorption must be treated to avoid secondary pollution. In this study, the treatment of DDTs in thermal desorption off-gas by pulsed corona discharge plasma was investigated. The effects of important operation parameters, including energy density, gas temperature, humidity, and O2 content, on DDTs degradation were investigated. The main degradation products were also studied. The DDTs degradation efficiency increased with the increase in energy density, gas temperature, and O2 content. The degradation efficiency of DDTs was achieved to 84.6% when the initial concentration, energy density, and gas flow rate were 2.0 mg/m3, 17.8 J/L, and 3.0 L/min, respectively. Maximum DDTs degradation efficiency was observed when the gas was at 5% relative humidity. The main degradation products identified were DM, phenol, benzene, acetic acid, and formic acid. It was calculated that 87% of chlorine in the degraded DDTs was converted into chloride ion.
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Affiliation(s)
- Fujun Ma
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Yina Zhu
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China
| | - Bin Wu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Qian Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Dongyao Xu
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China
| | - Jingwen Xu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Bin Wang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Qingbao Gu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
| | - Fasheng Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
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Xiao R, Ali A, Wang P, Li R, Tian X, Zhang Z. Comparison of the feasibility of different washing solutions for combined soil washing and phytoremediation for the detoxification of cadmium (Cd) and zinc (Zn) in contaminated soil. CHEMOSPHERE 2019; 230:510-518. [PMID: 31125879 DOI: 10.1016/j.chemosphere.2019.05.121] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 05/12/2019] [Accepted: 05/15/2019] [Indexed: 05/20/2023]
Abstract
Soil heavy metal contamination is a serious environmental problem needed to be addressed due to the toxicities of metals to both humans and living organisms. In this study, the remediation efficiencies of washing-coupled phytoremediation on Cd and Zn contaminated soils were evaluated with multiple washing reagents (i.e., hydrochloric acid (HCl), ethylene diamine tetraacetic acid (EDTA), nitrilotriacetic acid (NTA), several biodegradable natural low molecular mass organic acids (LMMOAs)) and ryegrass (Lolium perenne L.). Results indicated that soil washing with different reagents (at 100 mM) effectively removed metals from contaminated soils with the rates ranged from 4.73% to 81.0% and from 12.3% to 43.5% for Cd and Zn, respectively. Metal varieties and the properties washing reagents affected the detoxification performance. As for Cd, the removal rates decreased from over 80% to less than 10% in the order of EDTA > HCl > NTA > LMMOAs. By comparison, HCl and LMMOAs had higher removal efficiencies for Zn than other chelating reagents. The leaching of metals in the acid-extractable fraction was the main contribution to the overall metal removed. Additionally, soil nutrient contents, Ca specifically, were significantly decreased after washing, and the germination and growth of ryegrass were partly inhibited. Despite that, soil biota and enzyme activities responded differently among different treatments. This research also showed LMMOAs, especially citric acid (CA), were more suitable than HCl, EDTA, and NTA as reagents for the combined soil washing and phytoremediation, regarding their comparable metal removal efficiencies and less disturbing on soil fertilities and plant growth.
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Affiliation(s)
- Ran Xiao
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China
| | - Amjad Ali
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China
| | - Ping Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China
| | - Ronghua Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China
| | - Xiaohong Tian
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China.
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Metahni S, Coudert L, Gloaguen E, Guemiza K, Mercier G, Blais JF. Comparison of different interpolation methods and sequential Gaussian simulation to estimate volumes of soil contaminated by As, Cr, Cu, PCP and dioxins/furans. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 252:409-419. [PMID: 31158669 DOI: 10.1016/j.envpol.2019.05.122] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 05/09/2019] [Accepted: 05/22/2019] [Indexed: 06/09/2023]
Abstract
Understanding the spatial distribution of organic and/or inorganic contaminants is crucial to facilitate decision-making of rehabilitation strategies in order to ensure the most appropriate management of contaminated sites in terms of contaminant removals efficiencies and operating costs. For these reasons, various interpolation methods [Thiessen Polygon (TP) method, inverse of distance (IDW) method, ordinary kriging (OK), as well as sequential Gaussian simulations (SGS)] were used to better understand the spatial distribution of As, Cr, Cu, pentachlorophenol (PCP) and dioxins and furans (PCDD/F) found onto a specific industrial site. These methods do not only vary in complexity and efficiency but also lead to different results when using values coming from the same characterization campaign. Therefore, it is often necessary to evaluate their relevance by performing a comparative analysis. The results showed that ordinary kriging (OK) was a better estimator of the mean and more advanced compared to the two other methods of interpolation (TP and IDW). However, it appeared that SGS has the same power than OK but it also permitted to calculate a reliable value of the probabilities of exceeding regulatory cut-offs of contamination.
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Affiliation(s)
- Sabrine Metahni
- Institut national de la recherche scientifique (Centre Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, Qc, G1K 9A9, Canada.
| | - Lucie Coudert
- Université du Québec en Abititi-Témiscamingue (Institut de Recherche en Mines et Environnement), Université du Québec, 445 Boulevard de l'Université, Rouyn-Noranda, Qc, J9X 5E4, Canada.
| | - Erwan Gloaguen
- Institut national de la recherche scientifique (Centre Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, Qc, G1K 9A9, Canada.
| | - Karima Guemiza
- Centre technologique des résidus industriels en Abititi-Témiscamingue, 433 boulevard du collège, Rouyn-Noranda, Qc, J9X 0E1, Canada.
| | - Guy Mercier
- Institut national de la recherche scientifique (Centre Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, Qc, G1K 9A9, Canada.
| | - Jean-Francois Blais
- Institut national de la recherche scientifique (Centre Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, Qc, G1K 9A9, Canada.
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Yan Y, Li H, Yu X, Li S, Huang X, Li D, Jiao B. Efficient removal of chromium from soil in a modified electrokinetic system using iron-treated activated carbon as third electrode. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.03.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Race M, Marotta R, Fabbricino M, Pirozzi F, Andreozzi R, Guida M, Siciliano A. Assessment of optimal conditions for the restoration and recovery of agricultural soil. JOURNAL OF HAZARDOUS MATERIALS 2019; 373:801-809. [PMID: 30974328 DOI: 10.1016/j.jhazmat.2019.04.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 03/29/2019] [Accepted: 04/01/2019] [Indexed: 06/09/2023]
Abstract
We assessed whether soil with high Cr contamination could be reclaimed by alkali, mineral, and organic acid-based ligands (OABLs) washing. We tested HNO3, H2SO4, HCl, NaOH, H2O2, lactic acid (LA), malic acid (MA), oxalic acid (OA), and citric acid (CA), together with EDTA, obtaining the highest efficiencies in presence of 1 M sulfuric acid (98%). Nonetheless we noted that using OABLs, we obtained a Cr(III) removal efficiency similar to the one obtained using mineral acids. Indeed 1 M of LA and MA and 0.8 M of OA allowed obtaining, respectively, 88%, 75%, and 67% removal percentage. The extraction process with OABLs was strongly dependent on intraparticle diffusion of Cr-LA, Cr-MA, and Cr-OA complexes. We also determined the apparent diffusion coefficients. Residual toxicity of treated soils was tested with the nematode, Caenorhabditis elegans. The OABL washing generally allowed getting a soil without Cr and with reduced toxicity. However, the washing process also removed other cations that acted as nutrients. Consequently, we conducted toxicity tests on enriched soil and found that the mortality index improved. In some cases (LA and MA), mortality was comparable to that observed with uncontaminated control samples. In contrast, when contaminated soils were washed with sulfuric acid, in all conditions, we observed significant ecotoxicity. Therefore, we concluded that only the OABL treatment provided a non-toxic soil that could be reused for anthropic activities.
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Affiliation(s)
- Marco Race
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via di Biasio 43, 03043, Cassino, Italy.
| | - Raffaele Marotta
- Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Via Claudio 21, Naples, Italy
| | - Massimiliano Fabbricino
- Department of Chemical Engineering, Faculty of Engineering, University of Naples Federico II, P.le V. Tecchio, 80, 80125, Naples, Italy
| | - Francesco Pirozzi
- Department of Chemical Engineering, Faculty of Engineering, University of Naples Federico II, P.le V. Tecchio, 80, 80125, Naples, Italy
| | - Roberto Andreozzi
- Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Via Claudio 21, Naples, Italy
| | - Marco Guida
- Department of Biology, University of Naples Federico II, Via Cinthia, 80126, Naples, Italy
| | - Antonietta Siciliano
- Department of Biology, University of Naples Federico II, Via Cinthia, 80126, Naples, Italy
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Tong D, Fang K, Yang H, Wang J, Zhou C, Yu W. Efficient removal of copper ions using a hydrogel bead triggered by the cationic hectorite clay and anionic sodium alginate. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:16482-16492. [PMID: 30982191 DOI: 10.1007/s11356-019-04895-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 03/18/2019] [Indexed: 06/09/2023]
Abstract
Sodium alginate (SA) is a linear biopolymer, which is the nontoxic, biodegradable, and rich in carboxyl and hydroxyl groups. In the paper, the SA-based hydrogel bead was prepared by the cationic hectorite clay and anionic sodium alginate with a simple ionic gelation method under freeze-drying, and the adsorption properties were evaluated by the removal of copper ions from aqueous solutions. The composites were characterized by X-ray diffraction (XRD), nitrogen adsorption-desorption isotherm (BET), thermal analysis (TG), and Fourier transform infrared spectroscopy (FT-IR). The pseudo-first-order and pseudo-second-order kinetic models were used to describe the kinetic data and the Langmuir, Freundlich, Dubinin-Radushkevich (D-R), and Temkin models were applied to describe the adsorption isotherms. The results showed that the adsorption process was found to follow the Freundlich isotherm model and the maximum sorption capacity was observed to be 160.28 mg/g under the initial concentration from 10 to 700 mg/L at 45 °C. Adsorption kinetics data fitted well with pseudo-second-order rate model. The porous structure of the composite was responsible for the adsorption of Cu2+ ions. But the adsorption ability could be improved by pH. Finally, the adsorption mechanism was suggested. Graphical abstract.
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Affiliation(s)
- Dongshen Tong
- State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Discipline of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China.
| | - Kai Fang
- State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Discipline of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Haiyan Yang
- State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Discipline of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Jie Wang
- State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Discipline of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Chunhui Zhou
- State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Discipline of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Weihua Yu
- State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Discipline of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China
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Madrid F, Ballesteros R, Lacorte S, Villaverde J, Morillo E. Extraction of PAHS from an aged creosote-polluted soil by cyclodextrins and rhamnolipids. Side effects on removal and availability of potentially toxic elements. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 653:384-392. [PMID: 30412883 DOI: 10.1016/j.scitotenv.2018.10.316] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 10/08/2018] [Accepted: 10/23/2018] [Indexed: 06/08/2023]
Abstract
This study evaluated the effect of several cyclodextrins (CDs) and a rhamnolipid (RL) on the removal of polycyclic aromatic hydrocarbons (PAHs) from a co-contaminated soil which had received historically creosote and inorganic wood preservatives for almost 100 years, and the effect of such extractions on the potentially toxic elements (PTEs). The influence on such processes of an electrolyte (0.01 M Ca(NO3)2) was also studied. Up to 15.4% of the ∑16 PAHs were extracted using RL in the absence of the electrolyte as washing solution, but decreases until reaching 0.60% in the presence of Ca2+ due to RL precipitation and partial inactivation. Only up to 2% of the ∑16 PAHs was extracted with CDs (4-ring PAHs in higher concentrations), but the electrolyte had no effect on extraction. In relation to PTEs, CDs proved to be inefficient for their extraction, and even RL in the presence of the background electrolyte. But in the absence of electrolyte PTEs extraction by RL increased. Apart from that, the availability of Ni, Cr, and As, those more associated to Fe and Al soil surfaces, increased after extraction with RLs in the presence of Ca2+ (about 100% for Cr and Ni and 200% for As). Under these conditions Fe and Al availability increased two- and ten-fold, respectively, indicating that Fe-Al soil surfaces were altered. Therefore, the ionic strength and the cations present in the soil solution of soils have to be considered when RLs are used as extractants for remediation purposes.
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Affiliation(s)
- Fernando Madrid
- Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), Apdo. 1052, 41080 Sevilla, Spain.
| | - Rubén Ballesteros
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona, 18-26, 08034 Barcelona, Spain.
| | - Silvia Lacorte
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona, 18-26, 08034 Barcelona, Spain.
| | - Jaime Villaverde
- Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), Apdo. 1052, 41080 Sevilla, Spain.
| | - Esmeralda Morillo
- Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), Apdo. 1052, 41080 Sevilla, Spain.
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Accumulation of Arsenic and Heavy Metals in Native and Cultivated Plant Species in a Lead Recycling Area in Vietnam. MINERALS 2019. [DOI: 10.3390/min9020132] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This study was conducted to determine the soil contamination and the accumulation of arsenic (As) and heavy metals including chromium (Cr), copper (Cu), zinc (Zn), cadmium (Cd), and lead (Pb) in 15 native and cultivated plant species in a Pb recycling area of Dong Mai village, Hung Yen Province, Vietnam. The analysis of 32 soil samples collected from seven different sites in the study area revealed that the contents of Al, Fe, As, Cr, Cu, Zn, Cd, and Pb in the soils ranged from 6200–32,600, 11,300–55,500, 5.4–26.8, 24.9–290, 66.0–252, 143–455, 0.71–1.67, and 370–47,400 mg/kg, respectively. The contents of As, Cr, Cu, Zn, Cd, and Pb in rice grains and the shoots of 15 plant species ranged from 0.14–10.2, 1.00–10.2, 5.19–23.8, 34.7–165, 0.06–0.99, and 2.83–1160 mg/kg-dry weight (DW), respectively. Hymenachne acutigluma (Steud.) Gilliland, a potential hyperaccumulator of Pb (1160 mg/kg–DW), is considered the best candidate for phytoremediation of Pb-contaminated soil. The cultivation of rice and vegetables, and the use of some native plants for food for humans, pigs, and cattle should be managed with consideration of the accumulation of Pb in their aboveground biomass.
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Ye Z, Sirés I, Zhang H, Huang YH. Mineralization of pentachlorophenol by ferrioxalate-assisted solar photo-Fenton process at mild pH. CHEMOSPHERE 2019; 217:475-482. [PMID: 30439659 DOI: 10.1016/j.chemosphere.2018.10.221] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/22/2018] [Accepted: 10/31/2018] [Indexed: 06/09/2023]
Abstract
This work reports the use of ferrioxalate complexes to assist solar photo-Fenton treatment of pentachlorophenol (PCP) in aqueous medium at mild pH, which inhibits the precipitation of iron hydroxides and allows working at a low iron dosage. The experimental parameters were optimized by assessing the effect of initial concentrations of H2O2 (0-2.5 mM) and Fe(II) (2-10 mg/L), pH (3.0-9.0) and iron/oxalic acid molar ratios (1:0-1:13.5) on total organic carbon (TOC) removal. Ferrioxalate-assisted solar photo-Fenton achieved 97.5% mineralization in 120 min, clearly outperforming conventional Fenton and solar photo-Fenton. The presence of photosensitive ferrioxalate complexes accounted for the enhancement, as a result of Fe(II) regeneration that accelerated the hydroxyl radical (OH) production. The time course of H2O2 and Fe(II) concentrations was evaluated under different iron/oxalic acid ratios. The five carboxylic acids determined by ion-exclusion HPLC and the eight aromatic by-products identified by GC-MS allowed the proposal of a degradation pathway that included hydroxylation, dechlorination and dimerization steps. Complete chloride ion release was achieved after 90 min of treatment.
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Affiliation(s)
- Zhihong Ye
- Department of Environmental Science and Engineering, Wuhan University, Wuhan 430079, China; Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Ignasi Sirés
- Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Hui Zhang
- Department of Environmental Science and Engineering, Wuhan University, Wuhan 430079, China.
| | - Yao-Hui Huang
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan.
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Tu C, Guan F, Sun Y, Guo P, Liu Y, Li L, Scheckel KG, Luo Y. Stabilizing Effects on a Cd Polluted Coastal Wetland Soil using Calcium Polysulphide. GEODERMA 2018; 332:190-197. [PMID: 30504969 PMCID: PMC6260968 DOI: 10.1016/j.geoderma.2018.07.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this study, different dosages of calcium polysulphide (CaSx) were used as an amendment to investigate effects on the immobilizing of Cd in a wetland soil by pot experiment. In addition to chemical analysis (pH and bioavailable Cd concentration), changes in soil enzyme activities, microbial carbon utilization capacity, metabolic and community diversity were examined to assess dynamic impacts on soil environmental quality and toxicity of Cd resulting from ameliorant dosing. Soil pH increased immediately upon CaSx amendment compared to the unamended control (CK), and then declined slowly to a level lower than CK. Diethylenetriamine pentaacetic acid (DTPA) extractable Cd concentration was determined to characterize the bioavailability of Cd in the soil. The CaSx dose-dependent effect observed that with increasing CaSx dosage, the immobilizing efficiency decreased. Soil urease and catalase activity assays and Biolog EcoPlate assay indicated that early stage addition of CaSx significantly inhibited soil microbial activities. However, mid and late stage time periods showed the inhibition effects were alleviated, and the microbial activities could be recovered in 1% and 2% CaSx treatments. Moreover, with increasing incubation time, microbial community diversity and richness were significantly recovered in 1% and 2% CaSx treatments compared to the CK. No considerable changes were observed in the 5% CaSx treatment. Conclusively, the 1% CaSx amendment was an efficient and safe dosage for the stabilization of Cd contaminated wetland soil. This study contributes to the development of in situ remediation ameliorants and technologies for heavy metal polluted wetland soils.
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Affiliation(s)
- Chen Tu
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Feng Guan
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Yuhuan Sun
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Pengpeng Guo
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Ying Liu
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Lianzhen Li
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Kirk G Scheckel
- National Risk Management Research Laboratory, United States Environmental Protection Agency, Cincinnati 45224, USA
| | - Yongming Luo
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
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Shi L, Chen J, Wang Q, Song X. Effects of carrier on the transport and DDT removal performance of nano-zerovalent iron in packed sands. CHEMOSPHERE 2018; 209:489-495. [PMID: 29940532 DOI: 10.1016/j.chemosphere.2018.06.123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 06/15/2018] [Accepted: 06/18/2018] [Indexed: 06/08/2023]
Abstract
The delivery of nano-zerovalent iron (nZVI) as a remediation agent to targeted areas in soil was studied using different carriers. Among water, surfactant solution, and surfactant foam, the nZVI transport and carrying abilities followed the order of surfactant foam > surfactant solution > water. The nZVI migration was also facilitated by increased soil particle size and high surfactant concentration. Batch experiments probed the remediation of dichlorodiphenyltrichloroethane (DDT)-contaminated sand under different conditions. Compared to surfactant solution, the use of foam as a carrier achieved much higher DDT removal efficiencies for both coarse (foam/solution: 99/69%) and fine (foam/solution: 60/26%) sands. Additionally, the DDT removal efficiency was strongly influenced by surfactant concentration: foams generated using 1 and 5 g L-1 sodium lauryl ether sulfate (SLES) solutions reached the respective efficiencies of 44% and 75% under identical experimental conditions. However, the nature of the surfactant did not significantly affect the total removal efficiency of DDT. Solubilization, increased sweep efficiency, and reduction by nZVI were identified as factors affecting the DDT removal efficiency, and all three of them were involved when foam-nZVI was used as the flushing fluid.
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Affiliation(s)
- Lanxiang Shi
- Key Laboratory for Water and Sediment Sciences of the Ministry of Education, School of Environment, Beijing Normal University, 19 Xinjiekouwai Street, Haidian District, Beijing, 100875, China
| | - Jiajun Chen
- Key Laboratory for Water and Sediment Sciences of the Ministry of Education, School of Environment, Beijing Normal University, 19 Xinjiekouwai Street, Haidian District, Beijing, 100875, China.
| | - Qingwei Wang
- Key Laboratory for Water and Sediment Sciences of the Ministry of Education, School of Environment, Beijing Normal University, 19 Xinjiekouwai Street, Haidian District, Beijing, 100875, China
| | - Xinran Song
- Key Laboratory for Water and Sediment Sciences of the Ministry of Education, School of Environment, Beijing Normal University, 19 Xinjiekouwai Street, Haidian District, Beijing, 100875, China
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Chang MB, Hsu YC, Chang SH. Removal of PCDD/Fs, PCP and mercury from sediments: Thermal oxidation versus pyrolysis. CHEMOSPHERE 2018; 207:10-17. [PMID: 29763762 DOI: 10.1016/j.chemosphere.2018.05.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 03/30/2018] [Accepted: 05/06/2018] [Indexed: 06/08/2023]
Abstract
A continuous pilot-scale system (CPS) equipped with effective air pollution control devices (APCDs) is used for remediating the sediments contaminated with PCDD/Fs, PCP and Hg simultaneously. The removal efficiencies of these three pollutants in sediments collected from seawater pond and river, respectively, are evaluated via thermal treatment processes. PAHs and CBz formed during thermal oxidation and pyrolysis are also analyzed for better understanding the behaviors of chlorinated organic compounds. Experimental results indicate that low-molecular-weight PAHs are closely related to the formation of CBz, PCDD/Fs, and CPs, while low chlorinated PCDD/Fs and CBz are predominant in flue gas with thermal oxidation. However, the PM concentration is higher in thermal oxidation than pyrolysis due to the higher air flow rate of thermal oxidation. It may bring more particles out of the furnace and have a greater potential to form PCDD/Fs within APCDs. Besides, the high air flow also dilutes the Hg vapor in flue gas and would require more energy to condense and collect Hg with the quench tower. Furthermore, for removal of total amount of PCDD/Fs, pyrolysis is better than thermal oxidation. Thus, pyrolysis is more suitable for remediating the contaminated sediment. The removal efficiencies of PCDD/Fs, PCP and Hg in sediments achieved with pyrolysis increase with increasing operating temperature and retention time in CPS. Overall, the residual concentrations of PCDD/Fs and PCP in river sediment are higher than that in seawater-pond sediment since significant formation of tar is observed due to higher organic matter content in river sediment.
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Affiliation(s)
- Moo-Been Chang
- Graduate Institute of Environmental Engineering, National Central University, Chungli, 320, Taiwan.
| | - Yen-Chen Hsu
- Graduate Institute of Environmental Engineering, National Central University, Chungli, 320, Taiwan
| | - Shu-Hao Chang
- Graduate Institute of Environmental Engineering, National Central University, Chungli, 320, Taiwan
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50
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Ding J, Long G, Luo Y, Sun R, Chen M, Li Y, Zhou Y, Xu X, Zhao W. Photocatalytic reductive dechlorination of 2-chlorodibenzo-p-dioxin by Pd modified g-C 3N 4 photocatalysts under UV-vis irradiation: Efficacy, kinetics and mechanism. JOURNAL OF HAZARDOUS MATERIALS 2018; 355:74-81. [PMID: 29775880 DOI: 10.1016/j.jhazmat.2018.05.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 05/02/2018] [Accepted: 05/08/2018] [Indexed: 06/08/2023]
Abstract
Polychlorinated dibenzo-p-dioxins (PCDDs), as a group of notorious anthropogenic environmental toxicants, are arguably ubiquitous in nature. In this study, we investigated the photocatalytic reductive dechlorination of 2-chlorodibenzo-p-dioxin (2-CDD) over Pd/g-C3N4 catalysts under UV-vis irradiation. The g-C3N4 and a series of Pd/g-C3N4 catalysts were prepared by thermal polymerization and mechanical mixing-illumination method and characterized by XRD, TEM, BET, SEM and UV-vis DRS analyses. Among all the samples, the Pd/g-C3N4 (5 wt%) yielded the optimal dechlorination activity with a total 2-CDD conversion of 54% within 4 h, and 76% of those converted 2-CDD were evolved to dibenzo-p-dioxin (DD). The kinetics of dechlorination could be described as pseudo-first-order decay model (R2 > 0.84). Corresponding rate constants (k) increased from 0.052 to 0.17 h-1 with Pd contents up to 5 wt% and decreased to 0.13 h-1 with a 10 wt% of Pd. The enhanced activities originated from the surface plasmonic resonance (SPR) effect of Pd nanoparticles and the formation of Schottky barrier between Pd and g-C3N4, which extend the spectrum responsive range and suppress the charge recombination of g-C3N4. This is the first report on the photocatalytic reductive removal of PCDDs and may provide a new approach for PCDDs pollution control.
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Affiliation(s)
- Jiafeng Ding
- Department of Environmental Engineering, Zhejiang University, 866 Yu Hang Tang Road, Hangzhou 310058, China
| | - Gaoyuan Long
- Department of Environmental Engineering, Zhejiang University, 866 Yu Hang Tang Road, Hangzhou 310058, China
| | - Yang Luo
- Department of Environmental Engineering, Zhejiang University, 866 Yu Hang Tang Road, Hangzhou 310058, China
| | - Runze Sun
- Department of Environmental Engineering, Zhejiang University, 866 Yu Hang Tang Road, Hangzhou 310058, China
| | - Mengxia Chen
- Department of Environmental Engineering, Zhejiang University, 866 Yu Hang Tang Road, Hangzhou 310058, China
| | - Yajun Li
- Department of Environmental Engineering, Zhejiang University, 866 Yu Hang Tang Road, Hangzhou 310058, China
| | - Yanfang Zhou
- Department of Environmental Engineering, Zhejiang University, 866 Yu Hang Tang Road, Hangzhou 310058, China
| | - Xinhua Xu
- Department of Environmental Engineering, Zhejiang University, 866 Yu Hang Tang Road, Hangzhou 310058, China
| | - Weirong Zhao
- Department of Environmental Engineering, Zhejiang University, 866 Yu Hang Tang Road, Hangzhou 310058, China.
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