对甲基苯甲酸在大孔吸附树脂上的吸附热力学及动力学研究  

Study on adsorption thermodynamics and kinetics of p-toluic acid onto macroporous adsorption resin

作　　者：代喃喃[1] 刘玉林[1] 董庆华[1] 唐树和[1] 

机构地区：[1]盐城师范学院环境科学系,江苏省滩涂生物资源与环境保护重点建设实验室,江苏盐城224051

出　　处：《应用化工》2012年第1期79-82,共4页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(21077087);江苏省滩涂生物资源与环境保护重点建设实验室开放项目(JLCBE05004)

摘　　要：研究了对甲基苯甲酸在NDA-1800和JX-101大孔吸附树脂上的静态吸附热力学和动力学行为。结果表明,在283～313 K和研究的浓度范围内,两种大孔吸附树脂吸附对甲基苯甲酸的行为符合Freundlich吸附等温方程。对甲基苯甲酸在两种大孔吸附树脂上的吸附焓变△H<0,为放热过程;自由能变△G<0,吸附过程能自发进行;吸附熵变△S<0,这是因为吸附质分子从水溶液中被吸附到树脂表面后,其分子运动受到了限制,使吸附熵减少。两种大孔树脂吸附对甲基苯甲酸的速率常数都比较大,且随着温度的升高而增大。吸附活化能都比较低,吸附较容易进行。Experimental investigations were conducted to study the adsorption characteristics of p-toluic acid,with NDA-1800 and JX-101 resins as adsorbents.The results indicated that the equilibrium adsorption data was fitted well with Freundlich adsorption isotherm model in the temperature range of 283~313 K.The changes of enthalpy,free energy,entropy indicated an exothermic,spontaneous and disorder decreasing process happened in the adsorption,with low activation energy.The adsorption kinetics parameters were drawn from the experiment data and increased with raising temperature.

关 键 词：大孔吸附树脂 对甲基苯甲酸 热力学 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]