文献类型：期刊文献

中文题名：HMP和SDS在KMnO_(4)氧化水溶相PCE中的联合效应

英文题名：Co-Effects of HMP and SDS on PCE Oxidation Performance by KMnO_4 in Aqueous Solutions

作者：窦颖[1];邱兆富[1];胡林[1];吕树光[1];隋倩[1];陈梦帆[1]

机构：[1]华东理工大学资源与环境工程学院,国家环境保护化工过程环境风险评价与控制重点实验室,上海200237

年份：2014

卷号：27

期号：5

起止页码：534

中文期刊名：环境科学研究

外文期刊名：Research of Environmental Sciences

收录：CSTPCD;;国家哲学社会科学学术期刊数据库;EI(收录号：20142317795680);Scopus;北大核心:【北大核心2011】；CSSCI:【CSSCI_E2014_2016】；CSCD:【CSCD2013_2014】；

基金：上海市自然科学基金面上项目(12ZR1408000);国家环境保护公益性行业科研专项(201109013)

语种：中文

中文关键词：四氯乙烯;KMnO4;六偏磷酸钠;十二烷基磺酸钠;MnO2沉淀

外文关键词：tetrachloroethylene;potassium permanganate;sodium hexametaphosphate;sodium dodecyl sulfonate;manganese dioxide precipitate

摘要：利用KMnO_(4)原位化学氧化法处理污染地下水中的氯代烯烃已被证实有效可行,但是反应中产生的MnO_(2)沉淀会影响修复效果,延长修复时间.采用KMnO_(4)氧化法处理水溶相的PCE(四氯乙烯),研究了添加HMP(六偏磷酸钠)和SDS(十二烷基磺酸钠)对该反应的联合效应.结果表明,离子强度对MnO_(2)沉淀的生成影响显著,离子强度越高,MnO_(2)沉淀生成得越快.在20℃,ρ(PCE)初始值为20 mgL,n(KMnO_(4))∶n(PCE)为15∶1,离子强度为0.1 molL的条件下,单独添加HMP可减少反应过程中MnO_(2)沉淀的产生,ρ(HMP)为0.1 gL的条件下,24 h内没有产生MnO_(2)沉淀;单独添加SDS可增加Cl-生成量,在ρ(SDS)为1.0 gL的条件下,Cl-生成量增加了8.2%,但会增大MnO_(2)沉淀的生成速率;在同时添加HMP〔(ρ(HMP)为0.1 gL)〕和SDS〔(ρ(SDS)为1.0 gL)〕的条件下,Cl-生成量增加了7.5%,并且24 h内没有产生MnO_(2)沉淀,表明二者同时添加既可提高PCE的去除率又可减缓MnO_(2)沉淀的生成.
Currently,in situ chemical oxidation(ISCO)is commonly used to treat chlorinated solvents in contaminated soils and groundwater.Using potassium permanganate(KMnO_(4))in ISCO to treat the chlorohydrocarbon in contaminated groundwater has been proved effective and practicable,but the manganese dioxide(MnO_(2))precipitate generated in the reaction could affect the treatment to be efficacy and extend the remediation time.The co-effects of sodium hexametaphosphate(HMP)and sodium dodeeyl sulfonate(SDS)on PCE oxidation performance by KMnO_(4)were investigated in aqueous solution.Batch experimental results showed that the ionic strength(1)had a significant effect on the MnO_(2)precipitate,and the MnO_(2)precipitate generated faster with the increase of I.Under the experimental conditions temperature 20~C,p(PCE)20 mg/L,KMnO_(4)/PCE molar ratio 15:1 and ionic strength 0.1 mol/L,using HMP alone could reduce the MnO_(2)precipitate.There was no MnO_(2)precipitate in 24 h with p(HMP)of 0.1 g/L.Using SDS alone could increase the production of Cl^-.The production of Cl^-increased by 8.2%with p(SDS)of 1.0 g/L,while the generation rate of MnO_(2)precipitate increased greatly.With the combination of HMP(p(HMP)0.1 g/L)and SDS(p(SDS)1.0 g/L),the production of C1-increased by 7.5%and there was no MnO_(2)precipitate during 24 h reaction.The testing results strongly suggested that the combination of HMP and SDS can improve the removal rate of PCE and can alleviate the occurrence of the MnO_(2)precipitate.