氯型季铵树脂对钨酸根吸附的热力学研究  

Thermodynamic study on the adsorption of tungstate by chlorine-type quaternary ammonium resin

作　　者：曹才放 章行 李小文 邱晓辰 李昱芃 钟镇宇 王艺瞾 王建松 CAO Caifang;ZHANG Xing;LI Xiaowen;QIU Xiaochen;LI Yupeng;ZHONG Zhenyu;WANG Yizhao;WANG Jiansong(School of Metallurgical and Chemical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000

出　　处：《有色金属科学与工程》2018年第3期1-4,52,共5页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(51404113);江西省教育厅青年科学基金资助项目(GJJ14453)

摘　　要：针对钨离子交换工艺热力学参数缺乏的问题,测定了不同温度下氯型季铵树脂吸附钨酸根的平衡数据,由此计算出吸附过程的热力学参数.结果表明,吸附平衡数据符合Langmiur等温吸附方程;在求算Langmiur模型常数项时,非线性拟合方法对实验数据的拟合精度优于线性拟合的方法;氯型季铵树脂对钨酸根的吸附是吸热过程,ΔH为13.505 k J/mol,ΔS为0.098 k J/(mol·K),ΔG(298)为-15.833 k J/mol;并且,ΔG随着温度升高而变小,说明温度升高有利于获得更大的钨吸附容量,热力学分析与实验结果一致.In view of the lack of thermodynamic parameters in the ion exchange process of tungsten, the equilibrium data for the adsorption of tungstate by the chlorine-type quaternary ammonium resin at different temperatures were determined, and thus the thermodynamic parameters of the adsorption process were calculated. The results show that the adsorption equilibrium data accords with the Langmiur isothermal adsorption equation. When calculating the Langmiur model constant term, the fitting precision of the nonlinear fitting method to the experimental data is better than that of the linear fitting method.Furthermore, the adsorption of tungstate by chlorine-type quaternary ammonium resin is endothermic process,where ΔH is 13.505 k J/mol, ΔS is 0.098 k J/（mol·K） and ΔG（298） is-15.833 k J/mol. Moreover, ΔG is smaller with the increase of temperature, which shows that the increase of temperature is favorable for obtaining larger capacity of tungsten adsorption, and the thermodynamic analysis is consistent with the experimental results.

关 键 词：钨酸根 季铵树脂 离子交换 等温吸附 热力学 

分 类 号：TF111.3[冶金工程—冶金物理化学] TF841.1