Efficient remediation of different concentrations of Cr-contaminated soils by nano zero-valent iron modified with carboxymethyl cellulose and biochar
作者：
Lihong Xie;Qiyan Ma;Qingjun Chen;Yiyang Liu;Pengfei Guo;...
通讯作者：
Tingting Zhang;Shangyi Li
作者机构：
Department of Environmental Science and Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
China National Petroleum and Chemical Planning Institute, Beijing 100013, China
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
通讯机构：
Department of Environmental Science and Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
语种：
英文
关键词：
Carboxymethyl cellulose,Nanoscale zero-valent iron,Biochar,Cr-contaminated soils
期刊：
环境科学学报(英文版)
ISSN：
1001-0742
年：
2025
卷：
147
页码：
474-486
摘要：
Nano zero-valent iron (nZVI) is widely used in soil remediation due to its high reactivity. However, the easy agglomeration, poor antioxidant ability and passivation layer of Fe−Cr coprecipitates of nZVI have limited its application scale in Cr-contaminated soil remediation, especially in high concentration of Cr-contaminated soil. Herein, we found that the carboxymethyl cellulose on nZVI particles could increase the zeta potential value of soil and change the phase of nZVI. Along with the presence of biochar, 97.0% and 96.6% Cr immobilization efficiency through CMC-nZVI/BC were respectively achieved in high and low concentrations of Cr-contaminated soils after 90-days r...
