表面炭化磺酸基型阳离子树脂的制备及其对Fe(Ⅲ)吸附性能的研究  

PREPARATION OF SURFACE-CARBONIZED SULFONIC ACID-TYPE ION EXCHANGE RESIN AND ITS ADSORPTION OF Fe(Ⅲ)

作　　者：平伟光 高建峰[1] 胡拖平[1] 安富强[1] 周文霞[1] 陈曦[1] 王宇[1] 任成[1] 

机构地区：[1]中北大学理学院,太原030051

出　　处：《离子交换与吸附》2015年第1期32-42,共11页Ion Exchange and Adsorption

基　　金：国家国际科技合作专项项目(2011DFA51980);山西省科技合作专项项目(2011DFA51980);山西省自然基金(2013011040-3);煤转化国家重点实验室基金(J12-13-309);山西省攻关项目(20130321022-02)

摘　　要：将对苯乙烯磺酸钠(SSS)聚合接枝到表面炭化的CD301树脂表面,成功制备出一种新型吸附材料PSSS-g-CD301。研究了影响表面引发接枝聚合的主要因素,并采用静态法考察了PSSS-g-CD301对Fe(III)的吸附行为。结果表明,在接枝过程中,适宜的接枝时间是10h,适宜的引发剂用量为单体质量的1%,适宜的温度为35℃,适宜的单体质量分数为10%。PSSS-g-CD301对Fe(III)的吸附容量可以达到0.28mmol/g(p H=2,温度288K);准二级动力学方程可以更好地描述吸附动力学规律;吸附行为符合Langmuir与Freundlich吸附模型;热力学参数?H、?G、?S的计算结果表明,该吸附过程为自发的放热过程。The grafted material PSSS-g-CD301 was prepared by grafting of sodium styrene sulfonate(SSS) onto the surface of surface-carbonized resin CD301. The influence factors of the grafting reaction were investigated, and the optimal conditions for the surface-initiated graft polymerization system were obtained as follows: reaction time was 10 h, reaction temperature was 35℃, mass fraction of initiator was 1%, and the concentration of monomer was nearly 10%. Under these conditions, the adsorption capacity of PSSS-g-CD301 for Fe(III) was 0.28mmol/g at p H of 2 and 288 K. The adsorption of Fe(III) on PSSS-g-CD301 was investigated by static method. The adsorption dynamics could be described by Pseudo-second-order model, and the adsorption behaviour fitted for both Freundlich and Langmuir equation. The thermodynamic data(ΔH, ΔG, ΔS) suggested that the adsorption of Fe(III) on PSSS-g-CD301 was a spontaneously endothermic process with entropy increase.

关 键 词：接枝 表面炭化 热力学 动力学 

分 类 号：O647.33[理学—物理化学]