The adsorption–desorption behavior of La 3+ , Eu 3+ , and Y 3+ by Mg(OH) 2 -pretreated TP207 resin in sulfate solution has been investigated. The effects of the reaction duration, pH value, flow rate, and adsorption mechanism were studied in detail. The results show that the highest adsorption capacity is obtained at solution pH of 4.0. The adsorption affinity of the resin for the different rare-earth ions lies in the order La 3+ > Eu 3+ > Y 3+ , while the static equilibrium adsorption capacity is 0.73 mmol g −1 , 0.51 mmol g −1 , and 0.35 mmol g −1 , respectively. The optimum desorption conditions are 1 mol L −1 hydrochloric acid at a flow rate of 4 mL min −1 . The desorption liquid enrichment peaks follow the order La 3+ > Eu 3+ > Y 3+ , with corresponding enrichment factors of 24, 23, and 20. The adsorption process of TP207 resin is chemisorption, and the coordination mode between Y 3+ and resin functional groups is dominated by three donor atoms, but two for La 3+ and Eu 3+ .

中文翻译：

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Mg(OH)2 预处理的 TP207 树脂对 La3+、Eu3+ 和 Y3+ 的吸附-解吸

研究了硫酸盐溶液中经Mg(OH) 2 预处理的TP207树脂对La 3+ 、Eu 3+ 和Y 3+ 的吸附-解吸行为。详细研究了反应时间、pH值、流速和吸附机理的影响。结果表明，在溶液 pH 值为 4.0 时获得了最高的吸附容量。树脂对不同稀土离子的吸附亲和力顺序为La 3+ > Eu 3+ > Y 3+ ，而静态平衡吸附容量为0.73 mmol g -1 、0.51 mmol g -1 和0.35分别为 mmol g -1 。最佳解吸条件为1 mol L -1 盐酸，流速为4 mL min -1 。解吸液富集峰遵循La 3+ > Eu 3+ > Y 3+ 的顺序，对应的富集因子分别为24、23和20。