TP207树脂吸附La^(3+), Ca^(2+)及La^(3+)/Ca^(2+)分离系数测定研究  

Adsorption of La^(3+), Ca^(2+) and Determination of Separation Coefficient of La^(3+)/Ca^(2+) by TP207 Resin

作　　者：周洁英[1] 陈冬英[1] 伍莺[1] Zhou Jieying;Chen Dongying;Wu Ying(Ganzhou Nonferrous Metallurgy Research Institute, Ganzhou 341000, China)

机构地区：[1]赣州有色冶金研究所,江西赣州341000

出　　处：《中国稀土学报》2019年第2期210-216,I0003,共8页Journal of the Chinese Society of Rare Earths

基　　金：江西省科技成果转移转化项目(20143BBI90012);2017年度江西省赣州市重点研发计划项目(赣市财教字[2017]179号)资助

摘　　要：通过静态吸附和解吸试验系统研究了氯化体系中TP207树脂吸附La^(3+)和Ca^(2+)的规律,考察了吸附时间、吸附温度、吸附浓度和pH值对树脂吸附容量的影响,以及HCl浓度对负载树脂解吸率的影响,并得出了优化条件下的La^(3+)/Ca^(2+)分离系数。结果表明:在吸附时间5 h,吸附温度25℃和pH值为4.10的条件下, TP207树脂对La^(3+)和Ca^(2+)吸附容量分别为1.25和0.23 mmol·g^(-1)。在此条件下, La^(3+)/Ca^(2+)分离系数超过13,树脂循环利用20次后吸附容量下降10%,为工业生产中提La^(3+)除Ca^(2+)工艺提供了新的技术支持。The adsorption rules of La^3+ and Ca^2+ by TP207 resin in chlorinated system were studied by static adsorption and desorption experiment. The effects of adsorption time, adsorption temperature, adsorption concentration and pH value on adsorption capacity of the resin, the influence of hydrochloric acid concentration on the desorption rate of the loaded resin were investigated, and the separation coefficient of La^3+/Ca^2+ was obtained under the optimized conditions. The results showed that the adsorption capacities of La^3+ and Ca^2+ were 1.25 and 0.23 mmol·g-1 respectively under the conditions of adsorption time 5 h, adsorption temperature 25 ℃ and pH 4.10. Under these conditions, the separation coefficient of La^3+/Ca^2+ was over 13, the adsorption capacity of resin decreased by 10% after 20 cycles, which provided a new technical support for the process of removing Ca^2+ from La^3+ solution in industrial production.

关 键 词：TP 207树脂 吸附容量 静态吸附 La^3+/Ca^2+分离系数 循环次数 

分 类 号：TF845.6[冶金工程—有色金属冶金]