Insights into the Removal of Polystyrene Nanoplastics Using the Contaminated Corncob-Derived Mesoporous Biochar from Mining Area
Nanoplastic pollution has become a potential threat to aquatic ecosystem and the cost-effective technologies for controlling that are still insufficient. Contaminated corncobs from mining area were collected to prepare the functional mesoporous biochar (MBC) and demonstrate the ability to remove polystyrene nanoplastics (PSNPs) in water. Under the optimistic conditions, the adsorption of MBC towards PSNPs was preferably described by the Sips isotherm model and followed the second-order kinetics, with a theoretical maximum capacity of 56.02 mg·g-1. In further hydrothermal treatment, the adsorbed PSNPs on MBC can be completely degraded and simultaneously the biochar will be regenerated. The crucial factors were included oxygen-functional groups, metallic contents of MBC, superoxide radicals and holes. The degradation products were dominated as low-molecule-weight oligomers and main possible pathways are scission, hydrolysis and radical reaction. This work provided an inspired opinion utilizing the polluted biowaste to remove the emerging pollutant in water
Year of publication: |
[2022]
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Authors: | Zhu, Na ; Yan, Qian ; Wang, Xingyang ; Wei, Zhina ; Liang, Dong ; Yue, Huifeng ; Yun, Yang ; Li, Guangke ; Sang, Nan |
Publisher: |
[S.l.] : SSRN |
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