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

被引：253

作者：

Su, Huijie ^{[1
,2
]}

Fang, Zhanqiang ^{[1
,2
]}

Tsang, Pokeung Eric ^{[2
,3
]}

Zheng, Liuchun ^{[1
,2
]}

Cheng, Wen ^{[1
,2
]}

Fang, Jianzhang ^{[1
,2
]}

Zhao, Dongye ^{[4
]}

机构：

[1] South China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R China

[2] Guangdong Technol Res Ctr Ecol Management & Remed, Guangzhou 510006, Guangdong, Peoples R China

[3] Hong Kong Inst Educ, Dept Sci & Environm Studies, Hong Kong 00852, Hong Kong, Peoples R China

[4] Auburn Univ, Dept Civil Engn, Environm Engn Program, Auburn, AL 36849 USA

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2016年 / 318卷

关键词：

Cr(VI)-contaminated soil; Biochar (BC); Zero-valent iron nanoparticles (nZVI); Soil fertility; Phytotoxicity; PICKLING WASTE LIQUOR; ZEROVALENT IRON; AQUEOUS-SOLUTIONS; IMMOBILIZATION; REMOVAL; AMENDMENT; WATER; BIOAVAILABILITY; STABILIZATION; PHYTOTOXICITY;

D O I：

10.1016/j.jhazmat.2016.07.039

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, a kind of high-efficiency and low-cost biochar-supported zero-valent iron nanoparticles (nZVl@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 Cr-total 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. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：533 / 540

页数：8

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