壳聚糖-蒙脱土复合材料对活性艳橙X-GN吸附行为的研究  

Studies on the adsorption properties of chitosan-montmorillonite hybrid for reactive orange X-GN

作　　者：马娟娟[1,2] 刘霖[1] 王新龙[2] 李善忠[1] 高超[1] 

机构地区：[1]淮海工学院化学工程学院,江苏连云港222005 [2]南京理工大学化工学院,江苏南京210094

出　　处：《化学研究与应用》2009年第4期562-565,共4页Chemical Research and Application

基　　金：淮海工学院自然科学基金资助项目(Z2006010)

摘　　要：Chitosan-montmorillonite(CS-MMT) hybrid was prepared and characterized by XRD,FTIR and TG.The results showed that chitosan was intercalated into the layer structure of Na+-montmorillonite.The ability of CS-MMT hybrid as an adsorbent for the removal of reactive orange X-GN from aqueous solution has been studied.The effects of various parameters such as initial concentration and temperature were also studied.The Langmuir and Freundlich adsorption isotherms have been used to fit the experimental data,and the former giving the higher correlation.Thermodynamic parameters of the adsorption process,ΔG°,ΔH° and ΔS° were determined to be-24.90 kJ·mol-1(at 20℃),10.58 kJ·mol-1 and 121.0 J·mol-1·K-1,respectively.The results indicated that the adsorption of reactive orange X-GN on CS-MMT hybrid was spontaneous.Chitosan-montmorillonite （CS-MMT） hybrid was prepared and characterized by XRD,FTIR and TG. The results showed that chitosan was intercalated into the layer structure of Na^＋ -montmorillonite. The ability of CS-MMT hybrid as an adsorbent for the removal of reactive orange X-GN from aqueous solution has been studied. The effects of various parameters such as initial concentration and temperature were also studied. The Langmuir and Freundlich adsorption isotherms have been used to fit the experimental data, and the former giving the higher correlation. Thermodynamic parameters of the adsorption process ,△G°, △H°and AS° were determined to be -24.90 kJ·mol^-1 （ at 20℃）, 10.58 k J·mol^-1 and 121. 0 J· mol^-1· K^-1, respectively. The results indieated that the adsorption of reactive orange X-GN on CS-MMT hybrid was spontaneous.

关 键 词：壳聚糖-蒙脱土复合材料 吸附 活性艳橙X—GN 等温线 热力学 

分 类 号：TQ424.26[化学工程]