摘要
采用流涎法制备壳聚糖与聚乙烯醇的共混膜(CS/PVA).研究了共混膜吸附剂对SDBS的吸附性能,考察了溶液pH值、吸附时间、浓度、温度的影响.结果表明,吸附过程可以很好地用准二级动力学方程描述,吸附等温线用Langmuir方程的拟合效果优于Freundlich和Tempkin方程.在热力学研究表中,ΔGo<0,ΔHo>0,ΔSo>0,表明此吸附过程是自发、吸热和熵增加的过程.
The blend film of chitosan and polyvinyl alcohol（CS/PVA）has been prepared by casting method,and the blend film were investigated in relation to its adsorption behavior for sodium dodecyl benzenesulfonate（SDBS）.The effects of solution pH,adsorption time,concentration and temperature were considered.It was found that the adsorption process followed a pseudo-second order equation and the equilibrium isotherm was best described by the Langmuir model rather than the Freundlich and Tempkin model.In thermodynamic studies,the parameters of ΔGo0,ΔHo0 and ΔSo0 indicated that the adsorption process was spontaneous and endothermic with a increase in entropy.
出处
《闽江学院学报》
2012年第5期109-113,共5页
Journal of Minjiang University
基金
福建省教育厅基金项目(2011JB11143)
闽江学院科技启动项目(YKQ1005)
关键词
壳聚糖
聚乙烯醇
共混膜
十二烷基苯磺酸钠
吸附
chitosan
polyvinyl alcohol
blend film
sodium dodecylbenzenesulfonate
adsorption
