D860树脂对V(Ⅳ)的吸附性能研究  

Study on Adsorption of V(Ⅳ)with D860 Resin

作　　者：段继华[1] 包申旭[1,2] 张一敏[1,2,3] 周嘉郁[1] 

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]钒资源高效利用湖北省协同创新中心,武汉430081 [3]武汉科技大学资源与环境工程学院,武汉430081

出　　处：《有色金属（冶炼部分）》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)

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.

关 键 词：离子交换树脂 D860 Ⅴ(Ⅳ) 吸附 分离 富集 

分 类 号：TF841.3[冶金工程—有色金属冶金]