Remediation of hexavalent chromium contaminated soil by biochar-supported zero-valent iron nanoparticles

Huijie SU, Zhanqiang FANG, Po Keung Eric TSANG, Liuchun ZHENG, Wen CHENG, Jianzhang FANG, Dongye ZHAO

Research output: Contribution to journalArticles

101 Citations (Scopus)

Abstract

In this study, a kind of high-efficiency and low-cost biochar-supported zero-valent iron nanoparticles (nZVI@BC) was synthesised and used in the remediation of Cr(VI)-contaminated soil. The remediation tests indicated that the immobilisation efficiency of Cr(VI) and Crtotal was 100% and 91.94%, respectively, by 8 g nZVI@BC per kg soil for 15 d of remediation. Further investigations showed that exchangeable Cr was almost completely converted to Fe-Mn oxides and organic matter. Moreover, nZVI@BC could effectively improve soil fertility and reduce the leachability of Fe caused by nZVI. At the same time, the cabbage mustard growth experiments indicated that the phytotoxicity of Cr(VI) and Fe in the seedlings was effectively decreased by nZVI@BC treatment, and that the cabbage mustard growth was enhanced. Copyright © 2016 Elsevier B.V.
Original languageEnglish
Pages (from-to)533-540
JournalJournal of Hazardous Materials
Volume318
Early online dateJul 2016
DOIs
Publication statusPublished - Nov 2016

Citation

Su, H., Fang, Z., Tsang, P. E., Zheng, L., Cheng, W., Fang, J., et al. (2016). Remediation of hexavalent chromium contaminated soil by biochar-supported zero-valent iron nanoparticles. Journal of Hazardous Materials, 318, 533-540.

Keywords

  • Cr(VI)-contaminated soil
  • Biochar (BC)
  • Zero-valent iron nanoparticles (nZVI)
  • Soil fertility
  • Phytotoxicity

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