改性PVDF中空纤维液膜富集Er^(3+)的研究  

A Treatment of Er^(3+) with PVDF-inorganic Hollow Fiber Membrane Extraction Process

作　　者：张传成 王香兰[1] ZHANG Chuan-cheng;WANG Xiang-lan(Department of Chemistry and Environmental Engineering,Wuhan University of Bioengineering,Wuhan 430415,China)

机构地区：[1]武汉生物工程学院化学与环境工程学院,湖北武汉430415

出　　处：《稀土》2021年第3期79-84,共6页Chinese Rare Earths

基　　金：国家自然科学基金青年基金项目(21401146)。

摘　　要：为改善聚偏氟乙烯(PVDF)液膜稳定性并获得较高Er^(3+)萃取率,采用0.5%LiCl共混改性膜自制膜萃取器,研究了LiCl改性PVDF中空纤维膜对稀土离子Er^(3+)的富集。结果表明,Er^(3+)的萃取率随着载体HEHEHP浓度、反萃剂盐酸浓度和两相流速的增加先增大后减小,随着料液相初始H+浓度增加而降低。研究获得Er^(3+)的最佳萃取工艺为:料液相初始H+浓度为0.065 mol/L,反萃剂盐酸浓度为3.0 mol/L,载体HEHEHP浓度为0.25 mol/L,两相流速为10 mL/min。在此条件下,进一步考查了不同LiCl含量改性中空纤维膜富集Er^(3+)的效率。The membrane extractor made by PVDF-inorganic hollow fiber membrane was used to study the enrichment of rare earth ions Er^(3+). The optimum extraction conditions for enrichment of Er^(3+)were as follows: the initial H+ concentration of the feed phase was 0.065 mol/L, the stripping agent hydrochloric acid concentration was 3.0 mol/L, the concentration of the carrier P507 was 0.25 mol/L, and the flow rates of the two-phase were 10 mL/min. The results showed that the extraction rate of rare earth ion Er^(3+) first increases, then decreases with the increase of the carrier HEHEHP concentration, the stripping agent hydrochloric acid concentration and two-phase flow rate, and decreases with the increase of initial H+ concentration in the feed phase.

关 键 词：改性中空纤维膜 分离 2-乙基己基磷酸-单-2-乙基己基酯 铒 

分 类 号：O614.344[理学—无机化学]