Transport behavior of nZnO in geosynthetic clay liner used in municipal solid waste landfills under temperature effect |
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| Authors: | Ping Yang Muchen Wang Youlong Zhang Li Song Shijin Feng Shoubao Xue |
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| Affiliation: | 1.Department of Geotechnical Engineering, College of Civil Engineering,Tongji University,Shanghai,People’s Republic of China;2.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai,People’s Republic of China;3.Collaborative Innovation Center of Geohazard Prevention (CICGP),Chengdu,People’s Republic of China |
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| Abstract: | The transport process of nZnO in geosynthetic clay liner (GCL), an anti-seepage material used in municipal solid waste (MSW) landfills, under different seepage temperature conditions was conducted. The transport behavior of nZnO in GCL was analyzed. Results showed that the retardation performance of current GCL used in MSW landfills anti-seepage system against nZnO pollutants was poor. nZnO successfully permeated the GCL and entered external soil–groundwater environment, posing health threats to the life of organisms. Although seepage temperature exerted a small effect on nZnO suspension leakage volume, change in seepage temperature affects the mass of transported nZnO in GCL by redispersion of nZnO in suspension. As the seepage temperature increases, the mass of nZnO that permeated the GCL increases, reaching a maximum at 50 °C, and then decreases. |
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