摘要
研究D860阳离子交换树脂对V(Ⅳ)的吸附性能,进行pH、平衡吸附时间、温度和V(Ⅳ)初始浓度试验,分析了吸附过程的热力学、动力学特征以及等温吸附模型,同时研究了共存杂质离子对D860树脂吸附V(Ⅳ)的影响。结果表明,D860树脂吸附V(Ⅳ)的最佳pH为2.5,吸附平衡时间为8h,吸附量随温度、V(Ⅳ)初始浓度的升高而增大;吸附过程的ΔH=3.78kJ/mol、ΔS=49.44J/(mol·K)、ΔG298K=-10.95kJ/mol;拟一级、拟二级动力学模型均可以较好地解释吸附过程,吸附过程速率主要受颗粒扩散控制,表观吸附活化能为23.76kJ/mol;吸附符合Langmuir等温吸附模型;V/Al、V/P、V/Fe的分离因数均大于1。
Adsorption characteristics of D860 resin for temperature, and initial concentration of V （IV） V（IV） were studied. Effects of pH value, absorption time, on V （IV）adsorption were investigated. Adsorption thermodynamics, kinetics, isothermal absorption models, and effects of different impurity ions on V （IV） adsorption were investigated. The results indicate that the optimum pH value is 2. 5, and equilibrium time is 8 h for V （IV） adsorption on D860 resin. Adsorbing capacity improves with increases of temperature and initial concentration of V（IV）. AH= 3.78 kJ/mol, AS= 49.44 J/（mol·K）, AG298K =-10.95 kJ/mol. Pseudo-first order and pseudo-second order kinetic models are used to describe adsorption process of V （IV）, which was controlled by interparticle diffusion. The apparent sorption activation energy is 23.76 kJ/mol. Adsorption of V （IV） on resin fits Langmuir model. Separation factors of V/Al, V/P, V/Fe are all higher than one.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2016年第12期32-36,共5页
Nonferrous Metals（Extractive Metallurgy)
基金
国家自然科学基金资助项目(51404177)
作者简介
段继华（1994-），男，山西侯马人，硕士研究生；
通信作者：包申旭（1979-），湖北京山人，博士，副教授．
