| 酸化超滤法和螯合超滤法回收再利用SDS胶团 |
| 摘要点击 2885 全文点击 4240 投稿时间：2008-03-09 修订日期：2008-05-10 |
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| 中文关键词 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 |
| 英文关键词 micellar-enhanced ultrafiltration sodium dodecyl sulfate (SDS) recovery acidification chelation surfactant |
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| 中文摘要 |
| 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%. |
| 英文摘要 |
| The retentate stream containing Cd2+ was chosen for the investigation. Effects of acid reagent, chelator, pH and operation mode on separation of Cd2+and recovery of SDS, as well as efficiency of reclaimed SDS were investigated. The optimum conditions in acidification were obtained: H2SO4 as acid reagent, pH=1.0, operation mode of batch. Under these conditions, separation of Cd2+and recovery of SDS are 98.0% and 58.1%, respectively. And the efficiency of reclaimed SDS for removing Cd2+ is 80.2%. In chelation, the optimum conditions were investigated: EDTA as chelator, uncontrolled pH (pH=4.4) and operation mode of batch. Underthese conditions, separation of Cd2+and recovery of SDS are 90.1% and 60.5%, respectively. And the efficiency of reclaimed SDS for removing Cd2+ is 79.4% |
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