电解法回收胶团强化超滤(MEUF)浓缩液中的Cd^(2+)  

Recovery of Cd^(2+) by an Electrolytic Process from the Concentrated Solution of Micellar Enhanced Ultrafiltration

作　　者：林丹[1] 曾光明[1] 黄瑾辉[1] 方瑶瑶[1] 曲云欢[1] 李雪[1] 罗芳[1] 

机构地区：[1]湖南大学环境科学与工程学院,长沙410082

出　　处：《环境科学》2009年第11期3347-3352,共6页Environmental Science

基　　金：国家杰出青年科学基金项目(50425927;50225926);长江学者和创新团队发展计划项目(IRT0719);国家自然科学基金项目(50608028);2005年湖南省教育厅科学研究项目

摘　　要：胶团强化超滤是基于表面活性剂的双亲分子结构特性去除水中金属离子的新方法.重金属离子废水经胶团强化超滤处理后的浓缩液中含有高浓度的重金属离子,需进一步处理.采用电解法回收胶团强化超滤浓缩液中的Cd2+,考察了电极种类、电压、电解时间、pH、SDS与Cd2+浓度比等5个条件对电解效率的影响.研究发现,表面活性剂对电解有一定的阻化作用.实验得到最佳条件为:不锈钢(阳极)-石墨(阴极),U为2.8 V,电解时间为100 min,pH为4,[SDS]/[Cd2+]=5([SDS]=8.5 mmol/L恒定).在此条件下,浓缩液中的Cd2+的回收率达到了50.26%.Micellar enhanced uhrafihration（MEUF） is a new method which is based on the surfactant of the unique characteristic of parental molecular structure that can remove heavy metals in the water. The concentrated solution by dealing with the MEUF contains high concentration of heavy metal ions, so it must be need for further processing. The electrolysis method was employed to recovery Cd2＋ from the concentrated solution of micellar enhanced ultrafiltration（ MEUF）. Effects of type of electrode, electrolysis voltage（U） and time（ t ）, solution pH, surfactant to Cd2＋ molar ratio （[SDS]/[Cd2＋ ] ） on Cd2＋recovery efficiency were investigated. The study found that the surfactant had some effect of resistance to electrolysis process. The optimum experimental conditions were obtained：stainless steel（ anode）-graphite（cathode）, U = 2.8 V, t = 100 min, pH = 4, [ SDS] / [ Cd2 ＋ ] = 5 （ [ SDS ] = 8.5 mmol/L constant）. And the recovery efficiency of Cd2＋ in the concentrated solution was 50.26%.

关 键 词：胶团强化超滤(MEUF) 电解 镉回收 浓缩液处理 十二烷基硫酸钠 

分 类 号：X703.1[环境科学与工程—环境工程] TQ028.8[化学工程]