三烷基胺萃淋树脂吸附铂(Ⅳ)的性能与热力学研究  

Adsorption Properties and Thermodynamics of Platinum(Ⅳ) with Trialkylamines Extraction Resin

作　　者：刘军深[1] 李桂华[1] 陈厚[1] 刘春萍[1] 马松梅[1] 

机构地区：[1]烟台师范学院化学与材料科学学院,山东烟台264025

出　　处：《稀有金属》2005年第4期509-512,共4页Chinese Journal of Rare Metals

基　　金：烟台师范学院科研基金(042902)

摘　　要：研究了盐酸体系中三烷基胺萃淋树脂吸附铂(Ⅳ)的性能与热力学。结果表明:在pH=2.0时,分配比有最大值;树脂对铂(Ⅳ)的吸附容量为27.8mg.g-1树脂。其吸附等温式符合Q=12.6c0.19;增大溶液中氯离子浓度以及升高温度均对吸附不利。测得吸附焓、反应自由能和和熵变分别为-11.0,-13kJ.mol-1和6.7J.mol-1.K-1。吸附于树脂上的铂(Ⅳ)可以0.5mol.L-1的NaOH溶液予以洗脱。The adsorption properties and thermodynamics of platinum(Ⅳ) with trialkylamines extraction resin from HCl solution were studied. The results show that the distribution ratio of platinum(Ⅳ) is maximum at pH=2.0. The maximum adsorption capacity is 27.8 mg·g(-1). The adsorption isotherm can be expressed with formula Q=12.6C(0.19). The distribution ratio decreases with the increase of temperature and the concentration of Cl-. The estimated values for enthalpy, free energy change and entropy change of adsorption...

关 键 词：吸附 萃淋树脂 铂(Ⅳ) 

分 类 号：O647.3[理学—物理化学]