In-Situ Generation of Active Oxidants in Permeable Reactive Barriers

摘要：

　　The in-situ chemical oxidation(ISCO)is an effective technology for the remediation of organic contaminated groundwater.However,the requirement of adding oxidants,e.g.persulfate or H2O2,externally obviously reduces the economical efficiency of the overall treatment process.The method of in-situ generation of oxidants can avoid the disadvantage of conventional ISCO.Herein,our study indicates that the active chlorine can be effectively produced in a permeable reactive barrier(PRB)reactor,i.e.PRB-type two-compartment electrochemical device under the electric field.COD,i.e.chemical oxygen demand,as an indicator of organic pollutants in water was degraded by the insitu electrogenerated active chlorine through the electrolysis of NaCl solution.The amount of COD removed in the anode chamber was 104 mg/L after operating the two-compartment device at 7.0 V for 12 h under the given working conditions,and COD detected in the cathode chamber was near zero,meaning all COD is removable in effluent.The results show that the in-situ electrogeneration of oxidants technology can provide a promising option for the treatment of groundwater organic pollutants.

关键词： In-situ chemical oxidation Active chlorine Two-compartment electrochemical device

作者: Xu Yang Jingbo Yang Qinhai Hu Min Xia Zucheng Wu

作者单位: MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou 31005 Department of Environmental Engineering,Zhejiang University,Hangzhou 310058,China MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou 31005

会议类型: 国际会议

会议名称: The 8th International Congress on Environmental Geotechnics(第八届国际环境土工大会)

会议地点: 杭州

会议语种:英文

页码: 868-873

在线出版日期: 2018-10-28（万方平台首次上网日期，不代表论文的发表时间）