摘要
以壳聚糖为原料,制备季铵盐壳聚糖膜(QCSM)吸附剂,研究吸附剂对十二烷基苯磺酸钠(SDBS)的吸附性能,考察了溶液pH值、吸附时间、浓度和温度的影响。结果表明,吸附适宜条件的为:pH 4.0,吸附时间120 min,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,ΔG0<0,ΔH0>0,ΔS0>0,表明此吸附过程是自发、吸热和熵增加的过程。
The quaternary chitosan salt membrane（QCSM）was prepared as an adsorbent by using chitosan as raw material,and its adsorption behavior for sodium dodecylbenzenesulfonate（SDBS）was studied.Effect factors such as solution pH,adsorption time,concentration and temperature were investigated.Results showed that pH 4.0 and shaking time 120min were the optimal conditions for adsorption of SDBS.The adsorption process followed a pseudo-second order equation and the equilibrium isotherm may be described by Langmuir model rather than the Freundlich and Tempkin model.Thermodynamic studies indicated that adsorption process was spontaneous and endothermic with an increase in entropy.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2012年第11期65-69,78,共6页
Environmental Science & Technology
基金
国家自然科学基金项目(20901037)
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
季铵盐
膜
十二烷基苯磺酸钠
吸附
chitosan
quaternary ammonium salt
membrane
sodium dodecylbenzenesulfonate
adsorption
