摘要
采用干法制备出P204与TBP不同比例的双萃取剂浸渍树脂,探究了TBP的加入比例对树脂浸渍率、树脂对V(Ⅳ)吸附容量以及P204有效利用率的影响,研究了不同萃取剂配比的浸渍树脂对V(Ⅳ)与主要杂质离子(Fe^(3+)、Al^(3+))的分离效果。结果表明,TBP单独存在时浸渍树脂对V(Ⅳ)没有吸附作用,P204是吸附钒的主要萃取剂。随着TBP添加比例的增加,萃取剂在树脂上的浸渍率逐渐降低,浸渍树脂对V(Ⅳ)的吸附容量逐渐减小,但P204有效利用率有所增加。TBP的加入可缩短浸渍树脂对V(Ⅳ)的吸附平衡时间,同时可增大低酸度条件下对V(Ⅳ)的吸附容量。TBP的加入可增加浸渍树脂对V(Ⅳ)的吸附速率,不同萃取剂配比的P204-TBP浸渍树脂对V(Ⅳ)的吸附均符合准二级动力学方程。
Solvent impregnated resins（SIRs）were prepared by impregnating Amberlite XAD-16 HP with mixing extractant as different ratio of P204 to TBP.The effects of ratio of P204 to TBP on impregnation rate,adsorption capacity for V（Ⅳ）and effective utilization rate of extractant were investigated.Separation factor of V（Ⅳ）to main impurity ions（Fe^（3＋） and Al^（3＋））on different SIRs was studied.The results show that SIRs cannot adsorb V（Ⅳ）and adsorption capacity for V（Ⅳ）is attributed to P204 when extractant is sole TBP in SIRs.As proportion of TBP in mixing extractants rises,the impregnation rate of SIRs and adsorption capacity for V（Ⅳ）drop gradually,while the effective utilization rate of extractant rises.Addition of TBP to P204 can slightly shorten adsorption equilibration time for adsorbing V（Ⅳ）,and slightly improve adsorption capacity for V（Ⅳ）at lower pH value.The adsorption kinetics show that addition of TBP can increase adsorption reaction rate between SIRs and V（Ⅳ）.Adsorption of V（Ⅳ）on different SIRs fits well with pseudo-second order kinetic equation.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2018年第1期39-43,共5页
Nonferrous Metals（Extractive Metallurgy)
基金
国家自然科学基金资助项目(51404177)
"十二五"国家科技支撑计划项目(2015BAB03B05)
中央高校基本科研业务费专项资金资助项目(2017II34GX)
