D418螯合树脂对铟（Ⅲ）的吸附性能及机理研究

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摘要

研究了D418螯合树脂在NaOAc-HOAc缓冲溶液中对In³⁺的吸附性能与机理，结果表明，D418树脂在不同温度下吸附In³⁺的表观吸附速率常数分别为k_{293 K}= 2.07×10^-4 s-1，k^{_{313 K}}=3.49×10^-4 s^-1，k_{393 K}= 1.42×10^-3 s^-1，表观吸附活化能 E_a= 38.84 kJ·mol^-1；树脂吸附In³⁺热力参数△H= 96.27 kJ·mol-1，△S = 349.19 J·(mol·K)^-1，△G_{298 K} = - 6.04 kJ·mol^-1；吸附过程能较好地遵循 Langmuir 等温吸附规律。采用红外光谱方法探讨了吸附机理，结果表明，D418树脂功能基氨基和磷酸根与In3+形成了配位键。

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	孙热
	钱澈
	胡克
	赵海燕
	王荣耕
	刘鹏

关键词 ： D418螯合树脂, 铟（III）, 吸附 , 热力学, 动力学

Abstract：

The sorption behavior of the chelating resin containing aminomethylphosphonic acid groups (D418) was investigated. The parent rate constan is k_{293 K}= 2.07×10^-4 s^-1, k_{313 K}=3.49×10^-4 s^-1, k_{393 K}= 1.42×10^-3 s^-1 respectively. The themodynamic parameters of sorption are △H= 96.27 kJ·mol^-1，△S = 349.19 J·(mol·K)^-1，△G_{298 K} = -6.04 kJ·mol^-1. The sorption behavior of D418 for In³⁺ obeys the Langmuir isotherm. The sorption mechanism was examined by IR spectrometry. Amino group, resin functional group, phosphate and In³⁺ from the coordination bood.

Key words： D418 chelating resin indium (Ⅲ) adsorption thermodynamics kinetics

基金资助:

大学生创新创业训练计划项目（201510082014）

通讯作者: 赵海燕(1977—），河北保定人，副教授。E-mail：hbhaiyanzh@163.com

作者简介: 孙热(1996—），男，河北衡水人，本科生。

引用本文:

孙热，钱澈，胡克，赵海燕，王荣耕，刘鹏. D418螯合树脂对铟（Ⅲ）的吸附性能及机理研究[J]. 煤炭与化工, 2016, 39(6): 37-39，91. Sun Re，Qian Che，Hu Ke，Zhao Haiyan，Wang Gengrong，Liu Peng. Adsorption properties and mechanism of D418 chelating resin for indium. CCI, 2016, 39(6): 37-39，91.

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http://www.mtyhg.com.cn/CN/ 或 http://www.mtyhg.com.cn/CN/Y2016/V39/I6/37

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