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| Inhibition of initial bio-clogging of graphene oxide coated geotextiles in landfills |
| LIU Feng, WANG Qian, WU Hua-nan, XU Qi-yong |
| School of Environment and Energy, Shenzhen Graduate School, Peking University, Shenzhen 518055, China |
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Abstract Geotextile clogging is a common issue in landfill. Two modified methods were applied to landfill geotextiles with graphene oxide (GO) to inhibit the geotextile bio-clogging in the early stage. Different chemical and microbial properties were analysed, including zeta potential, contact angle, antimicrobial activity and microbial community. The amount of EPS was tested to evaluate the bio-clogging. The geotextile was hydrophobic after modification, but the surface charge changes in some extent. The leachate consisted of bacteria Paraclostridium and archaea Methanoculleus. GO exhibited antibacterial activity in leachate. Compared to the blank group, the geotextile coated with GO and Nafion inhibited geotextile bio-clogging, resulting in 49% decreasing of EPS.
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Received: 31 July 2019
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