酸化超滤法和螯合超滤法回收再利用SDS胶团  

Recovery and Reuse of SDS by Ultrafiltration with Acid or Chelator

作　　者：李雪[1] 曾光明[1] 黄瑾辉[1] 许柯[1] 方瑶瑶[1] 曲云欢[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2期469-474,共6页Environmental Science

基　　金：国家杰出青年科学基金项目(50425927;50225926);高等学校博士学科点专项科研基金项目(20020532017);高等学校优秀青年教学科研奖励计划项目;长江学者和创新团队发展计划项目;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：以含Cd2+的浓缩废液为对象,考察了不同的酸化剂、螯合剂、pH值、操作模式对Cd2+的分离、SDS胶团的回收和再利用效果的影响.结果表明,酸化超滤法最适宜的回收条件为:硫酸作为酸化剂,pH值为1.0,间歇式操作,此条件下,浓缩废液中Cd2+分离率和SDS胶团回收率分别为98.0%和58.1%,回收的SDS胶团再次应用到MEUF中处理含Cd2+废水,Cd2+去除率仍有80.2%;螯合超滤法最适宜的回收条件为:EDTA作为螯合剂,不控制pH值(pH=4.4),间歇式操作,此条件下,Cd2+分离率和SDS胶团回收率分别为90.1%和60.5%,再次应用到MEUF中处理含Cd2+废水,Cd2+去除率达到79.4%.The retentate stream containing Cd^2＋ was chosen for the investigation. Effects of acid reagent, chelator, pH and operation mode on separation of Cd^2＋ and recovery of SDS, as well as efficiency of reclaimed SDS were investigated. The optimum conditions in acidification were obtained： H2 SO4 as acid reagent, pH = 1.0, operation mode of batch. Under these conditions, separation of Cd^2＋ and recovery of SDS are 98.0% and 58.1%, respectively. And the efficiency of reclaimed SDS for removing Cd2Cd^2＋ is 80.2%. In chelation, the optimum conditions were investigated： EDTA as chelator, uncontrolled pH （pH = 4.4） and operation mode of batch. Under these conditions, separation of Cd^2＋ and recovery of SDS are 90.1% and 60.5%, respectively. And the efficiency of reclaimed SDS for removing Cd^2＋ is 79.4%.

关 键 词：胶团强化超滤 十二烷基硫酸钠(SDS) 回收 酸化 螯合 表面活性剂 

分 类 号：X703.1[环境科学与工程—环境工程]