Contact
    Start Publications Bio-clogging mitigation in the leachate collection system of ...
    ←  Publication Finder
    Attension

    Bio-clogging mitigation in the leachate collection system of municipal solid waste landfill using graphene oxide-coated geotextiles

    Year: 2021

    Journal: Chemosphere, Volume 268, APR

    Authors: Wang, Qian; Ko, Jae Hac; Liu, Feng; Xiong, Wei; Wang, Xinwei; Xu, Qiyong

    Organizations: National Key R&D Program of China [2018YFC1902903]; Shenzhen Science and Technology Innovation Committee [JCYJ20190806145607372]

    Keywords: Geotextile; Graphene oxide; Bio-clogging; Mitigation; Landfill

    In this study, graphene oxide (GO) was coated in geotextiles (GO-GT) to evaluate its potential for bio-clogging mitigation in the leachate collection system (LCS) of a landfill. Results showed that GO coating enhanced the surface hydrophilicity of geotextile. Bacterial experiments revealed that dead cells in the bio-clogging increased to 68.7% with GO-GT, compared to that in the GT (44.0%). After 136 days of operation, the GO-GT reduced the bio-clogging by decreasing the total amount of bacteria and the percentage of living bacteria. The total amount of extracellular polymeric substances in the GO-GT and GT was 22.8 +/- 4.4 and 52.8 +/- 4.8 mg/g of volatile suspended solids, respectively. Microbial analysis showed that Limnochordia and Symbiobacteriia were the most sensitive groups, with a decreased percentage in the GO-GT. Electrostatic repulsion and surface wrinkling were attributed to the attenuation effect on the GO-GT. These results imply the potential application of GO-coated geotextile for reducing bio-clogging in landfill LCS. (C) 2020 Elsevier Ltd. All rights reserved.
    View publication