title: Remediation of hexavalent chromium contaminated soil by biochar-supported zero-valent iron nanoparticles.
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 8g 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.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, Guangdong 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou, Guangdong 510006, China.
authors.forename: Huijie
authors.initials: H
authors.lastname: Su
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, Guangdong 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou, Guangdong 510006, China. Electronic address: sunmoon124@163.com.
authors.forename: Zhanqiang
authors.initials: Z
authors.lastname: Fang
authors.affiliation: Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou, Guangdong 510006, China; Department of Science and Environmental Studies, Hong Kong Institute of Education, Hong Kong 00852, China.
authors.forename: Pokeung Eric
authors.initials: PE
authors.lastname: Tsang
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, Guangdong 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou, Guangdong 510006, China.
authors.forename: Liuchun
authors.initials: L
authors.lastname: Zheng
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, Guangdong 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou, Guangdong 510006, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Cheng
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, Guangdong 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou, Guangdong 510006, China.
authors.forename: Jianzhang
authors.initials: J
authors.lastname: Fang
authors.affiliation: Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA.
authors.forename: Dongye
authors.initials: D
authors.lastname: Zhao
mesh_terms: D001673:Biodegradation, Environmental; D001937:Brassica / Q000187:drug effects / Q000254:growth & development; D002606:Charcoal / Q000737:chemistry*; D002857:Chromium / Q000032:analysis*; D052918:Environmental Restoration and Remediation; D005290:Ferric Compounds / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D009149:Mustard Plant / Q000187:drug effects / Q000254:growth & development; D010087:Oxides / Q000737:chemistry; D036226:Seedlings / Q000187:drug effects / Q000254:growth & development; D012989:Soil Pollutants / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; D017895:Manganese Compounds; D010087:Oxides; D012989:Soil Pollutants; C540010:biochar; D002857:Chromium; D002606:Charcoal; C074702:chromium hexavalent ion; C000499:ferric oxide; C027424:manganese oxide; D007501:Iron
keywords: Biochar (BC); Cr(VI)-contaminated soil; Phytotoxicity; Soil fertility; Zero-valent iron nanoparticles (nZVI)