Enhanced separation of yttrium, erbium and thulium with P507 induced by complexation kinetics of DTPA

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-04-01 DOI:10.1016/S1003-6326(24)66752-X

Na SUI , Shu-kai MIAO , Hao SHEN , Kai-hui CUI , Jia-qi WANG , Kun HUANG

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Abstract

Based on a non-equilibrium kinetic extraction technique, the complexation kinetics of diethylenetriamine- pentaacetic acid (DTPA) with rare earth (RE) ions was investigated with different adding sequences of DTPA. The results indicated that the separation factors of β_Tm/Er and β_Y/Er were higher when adding DTPA at the start of extraction than those before extraction. The extraction order for Y, Er and Tm was Tm>Y>Er. The root of discrepancy in complexation kinetics of Y, Er and Tm ions with DTPA and the enhanced kinetic separation mechanism were elucidated from the forward complex formation and reverse dissociation rates by the stopped-flow spectrophotometric technique. The apparent complexation rate constants began to decrease gradually with the increase of aqueous pH, while increased with increasing DTPA concentration. The emergence of extraction priority order as Tm>Y>Er was verified according to the calculated reaction kinetic constants of Y, Er and Tm at different pH values.

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DTPA络合动力学诱导P507增强钇、铒和铥的分离

基于非平衡萃取动力学技术，研究了稀土离子与二乙烯三胺-五乙酸（DTPA）的络合动力学。结果表明，在提取开始时加入DTPA， βTm/Er和βY/Er的分离因子均高于提取前。Y、Er、Tm的提取顺序为：Tm>；Y>Er。用停流分光光度法从正解离速率和反解离速率两方面分析了Y、Er和Tm离子与DTPA络合动力学差异的根源和增强的动力学分离机理。表观络合速率常数随着水溶液pH值的增加而逐渐减小，随着DTPA浓度的增加而增大。根据计算得到的Y、Er和Tm在不同pH值下的反应动力学常数，验证了萃取优先顺序为Tm>；Y>；Er的出现。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.