In situ stabilization remediation of cadmium contaminated soils of wastewater irrigation region using sepiolite

作     者：Yuebing Sun Guohong Sun Yingming Xu Lin Wang Dasong Lin Xuefeng Liang Xin Shi 

作者机构：Key Laboratory of Original Environmental Quality SafetyMinistry of AgricultureTianjin 300191China Tianjin Key Laboratory of Asro-environment and Agro-product SafetyInstitute of Agro-Environmental ProtectionMinistry of Agriculture7ianjin 300191China Department of Basic Sciencelianjin Agricultural UniversityTianjin 300384China College of Environment and ResourcesJilin UniversityChangchun 130012China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2012年第24卷第10期

页      面：1799-1805页

核心收录：

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 09[农学] 0901[农学-作物学] 

基　　金：supported by the National Natural Science Foundation of China (No. 21177068 40901154 21107056) the Program for Distinguished Scholar and Innovative Team of MOA (No. 2012-jcrc-xym) the Central Public Research Institutes Basic Funds for Research and Development (No.2011-szjj-syb) 

主　　题：Cd-contaminated soil immobilization remediation sepiolite soil quality 

摘      要：The effects of immobilization remediation of Cd-contaminated soils using sepiolite on soil pH, enzyme activities and microbial communities, TCLP-Cd （toxicity characteristic leaching procedure-Cd） concentration, and spinach （Spinacia oleracea） growth and Cd uptake and accumulation were investigated. Results showed that the addition of sepiolite could increase soil pH, while the TCLP-Cd concentration in soil was decreased with increasing sepiolite. The changes of soil enzyme activities and bacteria number indicated that a certain metabolic recovery occurred after the sepiolite treatments, and spinach shoot biomass increased by 58.5%-65.5% in comparison with the control group when the concentration of sepiolite was ~ 10 g/kg. However, the Cd concentrations in the shoots and roots of spinach decreased with an increase in the rate of sepiolite, experiencing 38.4%-59.1% and 12.6%--43.6% reduction, respectively, in contrast to the control. The results indicated that sepiolite has the potential for success on a field scale in reducing Cd entry into the food chain.