Efficacy and microbial responses of biochar-nanoscale zero-valent during in-situ remediation of Cd-contaminated sediment

نویسندگان

چکیده

In situ immobilization of heavy metals in sediments has been considered as a low-cost and eco-friendly remediation method. this study, biochar (BC) BC-nanoscale zero-valent iron composite (nZVI/BC) treatments with different doses were conducted to immobilize Cd situ. The performance BC nZVI/BC changing mobility bacterial community sediment was investigated, their efficiencies at various pH values also explored. After 140 d remediation, the results showed that application reduced released concentrations overlying water porewater by 31–69% 26–73%, respectively. Compared control, labile treated transformed stable fraction, TCLP (toxicity characteristic leaching produce) extracted decreased 7–29%. reduction closely related additional dose or nZVI/BC, presence nZVI greatly enhanced ability stabilize Cd. Notably, presented higher restriction for release from than values, both highest effects under alkaline condition. Bacterial analysis indicated richness diversity communities low-dose enhanced, while inhibition observed high due changes toxicity nZVI/BC. This study supplies new insights into potential on contaminated sediments.

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ژورنال

عنوان ژورنال: Journal of Cleaner Production

سال: 2021

ISSN: ['0959-6526', '1879-1786']

DOI: https://doi.org/10.1016/j.jclepro.2020.125076