Performance of Metal and Acid Ions Remediation in Contaminated Soils by Electrokinetics with Chitosan Permeable Reactive Barrier  

作　　者：杜勇立 马德青 张燕青 单文盼 黄满红 

机构地区：[1]Hunan Provincial Communications Planning,Survey & Design Institute [2]College of Environmental Science and Engineering,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry,Donghua University

出　　处：《Journal of Donghua University(English Edition)》2017年第4期607-612,共6页东华大学学报（英文版）

基　　金：National Natural Science Foundations of China(Nos.21477018,21007010);the Fundamental Research Funds for the Central Universities,China(No.15D111323);Hunan Province Ministry of Transportation Scientific Research Projects,China(Nos.200908,201105);Ministry of Transport Science and Technology Program,China(No.2010353343290)

摘　　要：Metal and acid ions contamination of soil in China is serious. To find an efficient solution for remediating the combined pollution,electrokinetics( EK) coupled with chitosan( CTS)permeable reactive barrier( EK/CPRB) was used to investigate the performances of metal and acid ions remediation. Adsorption characteristics of Zn^(2+),Fe^(3+),Ca^(2+),SO_4^(2-) and NO_3^- onto CTS were also conducted. The results showed the sorption of Zn^(2+),Fe^(3+),Ca^(2+),SO_4^(2-) and NO_3^- on CTS could be well described by Freundlich model. When the CTS dosage is 8 g,the total removal efficiency for Zn^(2+),Fe^(3+),Ca^(2+),SO_4^(2-) and NO_3^- is 86. 8%,90. 2%,92. 4%,90. 0% and 82. 5%,respectively. CTS enhanced ions remediation efficiencies significantly compared with the single EK system,especially for SO_4^(2-) and NO_3^-. The results indicate EK/CPRB system is suitable for the remediation of soil contaminated by both metal ions and acid ions.Metal and acid ions contamination of soil in China is serious. To find an efficient solution for remediating the combined pollution,electrokinetics（ EK） coupled with chitosan（ CTS）permeable reactive barrier（ EK/CPRB） was used to investigate the performances of metal and acid ions remediation. Adsorption characteristics of Zn^2＋,Fe^3＋,Ca^2＋,SO4^2- and NO3^- onto CTS were also conducted. The results showed the sorption of Zn^2＋,Fe^3＋,Ca^2＋,SO4^2- and NO3^- on CTS could be well described by Freundlich model. When the CTS dosage is 8 g,the total removal efficiency for Zn^2＋,Fe^3＋,Ca^2＋,SO4^2- and NO3^- is 86. 8%,90. 2%,92. 4%,90. 0% and 82. 5%,respectively. CTS enhanced ions remediation efficiencies significantly compared with the single EK system,especially for SO4^2- and NO3^-. The results indicate EK/CPRB system is suitable for the remediation of soil contaminated by both metal ions and acid ions.

关 键 词：electrokinetics acid ions metal ions Chitosan permeable reactive barrier REMEDIATION 

分 类 号：X703.1[环境科学与工程—环境工程]