用于电镀废水处理的PVDF中空纤维更新液膜性能的评价  

Evaluation of PVDF Hollow Fiber Renewal Liquid Membrane for Electroplating Wastewater Treatment

作　　者：贾悦[1,2] 郑丁杰[1,2] 吕晓龙[1,2] 

机构地区：[1]天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室培育基地 [2]天津工业大学生物化工研究所,天津300160

出　　处：《高分子材料科学与工程》2011年第10期92-96,共5页Polymer Materials Science & Engineering

基　　金：天津市重点基金资助项目(09JCZDJC26300);天津市教育委员会基金项目(20070613);国家教育部留学回国启动基金项目(2009.6)

摘　　要：采用实验室自制疏水微孔聚偏氟乙烯(PVDF)中空纤维膜组件,以2-乙基己基磷酸(D2EHPA)为载体、磺化煤油为溶剂配制成萃取剂、以硫酸为反萃剂,研究了中空纤维更新液膜萃取过程对镍离子的去除效果。考察了油水相比、不同操作模式、液相温度等系统运行条件及中空纤维和膜组件结构参数对镍离子去除率的影响。3h实验结果表明,油水相比为1∶50,废水与萃取剂混合液流经组件管程的操作模式下镍离子去除率达32.1%;增大纤维内径、减小纤维壁厚利于加速传质;优化的组件装填密度为26.9%,去除率达46.2%,增加组件长度也有助于镍离子的去除。The hollow fiber renewal liquid membrane（HFRLM） process was studied for nickel removal from wastewater using poly-vinylidene fluoride（PVDF） hydrophobic membrane.Di（2-ethylhexyl） phosphoric acid（D2EHPA） dissolved in kerosene was used as the extractant and H2SO4 as the stripping solution.The effects of operating conditions and the characteristics of hollow fiber and module on Ni2＋ removal were investigated experimentally.The results of 3h tests indicate that the O/W ratio of 1∶50 and the operating mode of mixing feed with the extractant can enhance Ni2＋ removal up to 32.1%.Increasing fiber inner diameter or reducing the fiber thickness facilitates the mass transfer.Furthermore,at the optimal module packing density of 26.9%,Ni2＋ removal is improved to 46.2% and increasing of the module length properly can also enhance nickel removal.

关 键 词：中空纤维更新液膜 聚偏氟乙烯 疏水膜 电镀废水 萃取 

分 类 号：TB83[一般工业技术—摄影技术]