螯合树脂脱除钨酸盐溶液中铜镁离子的研究  

Study on removal of copper and magnesium ions from tungstate solution by chelating resin

作　　者：崔春丽 郝振华 马如龙 王培 舒永春 何季麟 CUI Chunli;HAO Zhenhua;MA Rulong;WANG Pei;SHU Yongchun;HE Jilin(School of Material Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;Zhongyuan Critical Metals Laboratory,Zhengzhou 450001,China;School of Material Science and Engineering,Henan University of Technology,Zhengzhou 450001,China)

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450001 [2]中原关键金属实验室,河南郑州450001 [3]河南工业大学材料科学与工程学院,河南郑州450001

出　　处：《应用化工》2024年第8期1755-1760,1776,共7页Applied Chemical Industry

基　　金：国家重点研发计划(2022YFC2904902)。

摘　　要：采用离子交换法,选用对铜离子和镁离子具有高选择性的CH-93螯合树脂和LSC-500螯合树脂深度脱除钨酸盐溶液中铜镁离子,探究不同因素对吸附效果的影响,并对吸附类型、吸附热力学及动力学进行分析。结果表明:在不同吸附参数下,铜镁离子的吸附率均可达到99%以上。热力学研究表明,树脂吸附铜镁离子是自发、吸热和熵增的过程。动力学研究表明,树脂吸附铜镁离子的过程符合Langmuir等温吸附模型和准二级动力学模型,液膜扩散是控速步骤。柱上离子交换结果表明,钨酸盐溶液经过12 h的CH-93/LSC-500树脂吸附后,铜镁离子含量分别从60000μg/L降低至14.6,24.4μg/L,且没有出现穿漏现象。The ion exchange method was used to select CH-93 chelating resin and LSC-500 chelating resin with high selectivity for copper and magnesium ions to deeply remove copper and magnesium ions from tungstate solution,explore the influence of different factors on the adsorption effect,and analyze the adsorption type,adsorption thermodynamics and kinetics.The results show that the adsorption rate of copper and magnesium ions can reach more than 99%under different adsorption parameters.Thermodynamics studies shows that the adsorption of copper and magnesium ions by resin is a spontaneous,endothermic and entropic process.The kinetic studies show that the adsorption process of copper and magnesium ions by resin conforms to Langmuir isothermal adsorption model and quasi-second-order kinetic model,and liquid film diffusion is a rate-controlling step.The ion exchange results on the column showed that after 12 h adsorption by CH-93/LSC-500 resin,the content of copper and magnesium ions decreased from 60000μg/L to 14.6,24.4μg/L,respectively,without leakage.

关 键 词：螯合树脂 铜离子 镁离子 热力学 动力学 离子交换柱 

分 类 号：TF841.1[冶金工程—有色金属冶金] TF111TF804