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Solubilization and degradation of perchloroethylene (PCE) in cationic and nonionic surfactant solutions

查看全文 作　　者：Sivaram [1]Harendra;Cumaraswamy [2]Vipulanandan 高影响力作者 机构地区：[1]Department of Energy, National Energy Technology Laboratory;[2]Civil and Environmental Engineering, University of Houston, N107 Engineering Bldg. 1, Houston, TX 77204, USA高影响力机构 出　　处：《Journal of Environmental Sciences》索引2011年第23卷第8期,共9页高影响力期刊 基　　金：supported by the Center for Innovative Grouting Materials and Technology (CIGMAT) at the University of Houston with funding from the Texas Hazardous Waste Research Center and Texas Higher Education Coordinating Board (THECB) 摘　　要：Solubilization of perchloroethylene (PCE) in a nonionic (Triton X-100) and a cationic (cetyltrimethylammonium bromide (CTAB)) surfactant solutions and the degradation of surfactant solubilized PCE using fine to nanosize Fe and bi-metallic Fe-Ni particles were investigated. Micelle partition coeficients (Km) and molar solubility ratio (MSR) for PCE in 10 g/L of surfactant solutions have been quantified and the solubility of PCE (100 mg/L in water) in the surfactant solutions increased by about ten fold. Of the two surfactants studied, Triton X-100 solubilized the higher amount of PCE per gram of surfactant. To degrade solubilized PCE, both iron and bi- metallic Fe-Ni particles were used in continuously stirred batch reactors. The iron and bi-metallic particles were synthesized using the solution method and the particles were characterized using the SEM, EDS, TEM and XRD. The PCE solubilized up to 500 mg/L in both surfactant solutions were totally degraded at various rates by 200 g/L of bi-metallic Fe-Ni particles in less than 20 hr, which is the highest concentration of PCE degraded in the shortest time compared to data in the literature. The degradations of PCE solubilized in surfactant solutions were represented by nonlinear kinetic relationships which depended on the type of surfactant used for solubilizing the PCE. 关 键 词：非离子型表面活性剂 阳离子表面活性剂 四氯乙烯 PCE 表面活性剂溶液 退化 增溶 十六烷基三甲基溴化铵
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