Influencing factors of bentonite for the directional electric repair of landfill HDPE membrane leakage in calcium ion solution
The timely repair of high-density polyethylene (HDPE) membrane leakage in landfills is an important means of environmental risk control, which is critical for preventing leachate from polluting groundwater and soil. Electric repair technology is expected to become a hot spot in the leakage repair of...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | Waste Management Bulletin |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949750724000853 |
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| author | Guangyuan Yao Yuqiang Liu Ya Xu Jingcai Liu Can Qian Yanmei Yang Zhu Liang Minsong Lin |
| author_facet | Guangyuan Yao Yuqiang Liu Ya Xu Jingcai Liu Can Qian Yanmei Yang Zhu Liang Minsong Lin |
| author_sort | Guangyuan Yao |
| collection | DOAJ |
| description | The timely repair of high-density polyethylene (HDPE) membrane leakage in landfills is an important means of environmental risk control, which is critical for preventing leachate from polluting groundwater and soil. Electric repair technology is expected to become a hot spot in the leakage repair of HDPE films, because it can solve the issues of complex operation, high costs, and security risks during the operation and closure of landfills. To explore the influence law of various technical factors on the electric repair process, we carried out single factor experiments on the main influencing factors such as the operation time, bentonite concentration and dispersant/bentonite dosage ratio, leakage size, and calcium concentration. We then explored the best technological conditions. The results showed that accumulation at the leakage site possessed a good repair effect with a permeability coefficient of 4.22 × 10−6 cm/s. Furthermore, we observed that the Zeta potential played an important role in the electric repair technology, where the higher the absolute value of the Zeta potential, the faster the electrophoretic migration rate of the bentonite particles, and the lower the permeability coefficient of accumulation. This study may serve as a theoretical basis and offer scientific guidance for the directional electric repair of HDPE membrane leakage during the operating period and after the closure of landfills. |
| format | Article |
| id | doaj-art-c41e6d45441c4674b2125e08e9da51a9 |
| institution | Kabale University |
| issn | 2949-7507 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Waste Management Bulletin |
| spelling | doaj-art-c41e6d45441c4674b2125e08e9da51a92024-12-18T08:55:25ZengElsevierWaste Management Bulletin2949-75072024-12-012495101Influencing factors of bentonite for the directional electric repair of landfill HDPE membrane leakage in calcium ion solutionGuangyuan Yao0Yuqiang Liu1Ya Xu2Jingcai Liu3Can Qian4Yanmei Yang5Zhu Liang6Minsong Lin7State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Ministry of Ecology and Environment Key Laboratory of Hazardous Waste Identification and Risk Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaState Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Ministry of Ecology and Environment Key Laboratory of Hazardous Waste Identification and Risk Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaState Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Ministry of Ecology and Environment Key Laboratory of Hazardous Waste Identification and Risk Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaState Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Ministry of Ecology and Environment Key Laboratory of Hazardous Waste Identification and Risk Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaState Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Ministry of Ecology and Environment Key Laboratory of Hazardous Waste Identification and Risk Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaSchool of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaState Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Ministry of Ecology and Environment Key Laboratory of Hazardous Waste Identification and Risk Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China; Corresponding authors.State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Ministry of Ecology and Environment Key Laboratory of Hazardous Waste Identification and Risk Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Corresponding authors.The timely repair of high-density polyethylene (HDPE) membrane leakage in landfills is an important means of environmental risk control, which is critical for preventing leachate from polluting groundwater and soil. Electric repair technology is expected to become a hot spot in the leakage repair of HDPE films, because it can solve the issues of complex operation, high costs, and security risks during the operation and closure of landfills. To explore the influence law of various technical factors on the electric repair process, we carried out single factor experiments on the main influencing factors such as the operation time, bentonite concentration and dispersant/bentonite dosage ratio, leakage size, and calcium concentration. We then explored the best technological conditions. The results showed that accumulation at the leakage site possessed a good repair effect with a permeability coefficient of 4.22 × 10−6 cm/s. Furthermore, we observed that the Zeta potential played an important role in the electric repair technology, where the higher the absolute value of the Zeta potential, the faster the electrophoretic migration rate of the bentonite particles, and the lower the permeability coefficient of accumulation. This study may serve as a theoretical basis and offer scientific guidance for the directional electric repair of HDPE membrane leakage during the operating period and after the closure of landfills.http://www.sciencedirect.com/science/article/pii/S2949750724000853BentoniteElectric repairPermeability coefficientHDPE membrane |
| spellingShingle | Guangyuan Yao Yuqiang Liu Ya Xu Jingcai Liu Can Qian Yanmei Yang Zhu Liang Minsong Lin Influencing factors of bentonite for the directional electric repair of landfill HDPE membrane leakage in calcium ion solution Waste Management Bulletin Bentonite Electric repair Permeability coefficient HDPE membrane |
| title | Influencing factors of bentonite for the directional electric repair of landfill HDPE membrane leakage in calcium ion solution |
| title_full | Influencing factors of bentonite for the directional electric repair of landfill HDPE membrane leakage in calcium ion solution |
| title_fullStr | Influencing factors of bentonite for the directional electric repair of landfill HDPE membrane leakage in calcium ion solution |
| title_full_unstemmed | Influencing factors of bentonite for the directional electric repair of landfill HDPE membrane leakage in calcium ion solution |
| title_short | Influencing factors of bentonite for the directional electric repair of landfill HDPE membrane leakage in calcium ion solution |
| title_sort | influencing factors of bentonite for the directional electric repair of landfill hdpe membrane leakage in calcium ion solution |
| topic | Bentonite Electric repair Permeability coefficient HDPE membrane |
| url | http://www.sciencedirect.com/science/article/pii/S2949750724000853 |
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