表面活性剂改性P_(507)浸渍树脂吸附In(Ⅲ)的性能研究  

THE ADSORPTION PROPERTIES OF P_(507) IMPREGNATED RESIN MODIFIED BY SURFACTANTS FOR INDIUM

作　　者：龚福忠[1] 王旭刚[1] 曹欣欣[1] 周彬[1] 余灵君[1] 

机构地区：[1]广西大学化学化工学院,南宁530004

出　　处：《离子交换与吸附》2012年第6期506-515,共10页Ion Exchange and Adsorption

基　　金：国家自然科学基金项目(20966001)

摘　　要：首先以阳离子表面活性剂CTAB(十六烷基三甲基溴化铵)对AB-8大孔树脂进行表面改性,然后浸渍到含萃取剂P507[2-乙基己基磷酸单(2-乙基己基)酯]的石油醚溶液中,制备了P507浸渍树脂,研究了该改性树脂吸附In(Ⅲ)的热力学和动力学性能,并进行了动态吸附和脱附实验。结果表明,用CTAB对AB-8大孔树脂进行表面改性后,P507在树脂上的负载量和In(Ⅲ)在树脂上的吸附量都显著提高,其中P507的负载量提高了32.2%,In(Ⅲ)的吸附量提高了21.2%。In(Ⅲ)在改性P507浸渍树脂上的等温吸附符合Langmuir吸附方程,饱和吸附量为32.5mg/g;对In(Ⅲ)的吸附为吸热过程,升高温度有利于In(Ⅲ)的吸附,ΔH=5.28kJ/mol,ΔG(303K)=-2.18kJ/mol,ΔS=24.61J/mol.K。在pH=1.0时In(Ⅲ)在P507浸渍树脂上的吸附效果最好,而且易于与Al(Ⅲ)、Zn(Ⅱ)等杂质离子进行分离。The AB-8 macroporous resin was modified by using cation surfactant CTAB （hexadecyltrimethyl ammonium bromide） firstly, and then was dipped in to the petroleum ether solution which contained extraction agent P507 [2-ethylhexyl phosphate single （2-ethylhexyl） ester] for 4h, the load P507 impregnating resin was prepared. Its adsorption properties of thelanodynamics and kinetics for In（Ⅲ） were also studied. Results showed that after modification with CTAB, the Ps07-1oading capacity onto the AB-8 macroporous resin was increased by 32.2% and the adsorption capacity of In（Ⅲ） onto the load Ps0v impregnating resin was increased by 21.2%, the equilibrium adsorption data fitted to Langmuir adsorption isotherms and the saturated amount of adsorption was 32.5mg/g. This adsorption was an endothermic process, elevated temperature was helpful to In（Ⅲ） adsorption, and the difference of thermodynamic function were AH=5.28kJ/mol, AG （303K）=-2.18kJ/mol, AS=24.61J/mol.K, respectively. It was also found that In（m） had the maximun adsorption at pH 1.0, and had a good separation with other impurity ions such as AI（Ⅲ）, Zn（Ⅱ） very well.

关 键 词：浸渍树脂 表面活性剂 表面改性 In(Ⅲ) 吸附 

分 类 号：O647.131[理学—物理化学] TQ028.13[理学—化学]