Effects of sepiolite on stabilization remediation of heavy metal-contaminated soil and its ecological evaluation

作     者：Yuebing SUN Dan ZHAO Yingming XU Lin WANG Xuefeng LIANG Yue SHEN 

作者机构：Key Laboratory of Original Environmental Quality Ministry of Agriculture/Tianjin Key Laboratory of Agro-Environment and Ago-Product Safety Institute of Agro-Environmental Protection Ministry of Agriculture Tianjin 300191 China College of Resources and Environmental Sciences Henan Agricultural University Zhengzhou 450002 China 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2016年第10卷第1期

页      面：85-92页

核心收录：

学科分类：12[管理学] 1204[管理学-公共管理] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 082803[工学-农业生物环境与能源工程] 0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 08[工学] 0828[工学-农业工程] 120405[管理学-土地资源管理] 

基　　金：This work was supported by National High Technol- ogy Research and Development Program of China (Grant No. 2012AA101404-5) and the National Natural Science Foundation of China (Grant Nos. 21107056 and 21177068). The authors would also like to thank the Special Fund for Agro-scientific Research in the Public Interest (No. 201203045) 

主　　题：stabilization remediation heavy metals sepio-lite soil quality spinach (Spinacia oleracea) 

摘      要：Stabilization in the remediation of heavy metal contaminated soils has been gaining prominence because of its cost-effectiveness and rapid implementation. In this study, microbial properties such as microbial community and enzyme activities, chemical properties such as soil pH and metal fraction, and heavy metal accumulation in spinach （Spinacia oleracea） were considered in assessing stabilization remediation effectiveness using sepiolite. Results showed that soil pH values increased with rising sepiolite concentration. Sequential extraction results indi- cated that the addition of sepiolite converted significant amounts of exchangeable fraction of Cd and Pb into residual form. Treatments of sepiolite were observed to reduce Cd and Pb translocation from the soil to the roots and shoots of spinach. Concentrations of Cd and Pb exhibited 12.6%-51.0% and 11.5%-46.0% reduction for the roots, respectively, and 0.9%-46.2% and 43.0%- 65.8% reduction for the shoots, respectively, compared with the control group. Increase in fungi and actinomycete counts, as well as in catalase activities, indicated that soil metabolic recovery occurred after sepiolite treatments.