| Literature DB >> 27064615 |
Huijie Su1, Zhanqiang Fang2, Pokeung Eric Tsang3, Jianzhang Fang1, Dongye Zhao4.
Abstract
In this study, a biochar-supported nanoscale zero-valent iron (nZVI@BC) material was used for in situ remediation of hexavalent chromium-contaminated soil. Sedimentation tests and column experiments were used to compare the stability and mobility of nZVI@BC and bare-nZVI. The immobilisation efficiency of chromium, toxic effect of chromium and the content of iron were assessed through leaching tests and pot experiments. Sedimentation tests and transport experiments indicated that nZVI@BC with nZVI to BC mass ratio of 1:1 exhibited better stability and mobility than that of bare-nZVI. The immobilisation efficiency of Cr(VI) and Crtotal was 100% and 92.9%, respectively, when the soil was treated with 8 g/kg of nZVI@BC for 15 days. Moreover, such remediation effectively reduced the leachability of Fe caused by bare-nZVI. In addition, pot experiments showed that such remediation reduced the phytotoxicity of Cr and the leachable Fe and was favourable for plant growth.Entities:
Keywords: Cr(VI)-contaminated soil; Mobility; Phytotoxicity; Stability; nZVI@BC
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Year: 2016 PMID： 27064615 DOI： 10.1016/j.envpol.2016.03.072
Source DB: PubMed Journal: Environ Pollut ISSN： 0269-7491 Impact factor: 8.071