壳聚糖微粒对水中铜离子吸附性能研究  

Preparation of Chitosan Microparticle and Adsorption Capacity for Cu(Ⅱ) in Water

作　　者：李芳[1] 丁纯梅[1] 

机构地区：[1]安徽工程科技学院生化系,安徽芜湖241000

出　　处：《环境与健康杂志》2010年第9期794-796,共3页Journal of Environment and Health

基　　金：安徽省教育厅自然科学基金重点资助项目(2003kj008zd)

摘　　要：目的研究壳聚糖微粒对铜离子的吸附性能。方法采用扫描电镜(SEM)对壳聚糖微粒进行表征,研究吸附时间(0～360min)、温度(25～55℃),初始pH值(2～5)对壳聚糖微粒吸附铜离子的影响,探讨壳聚糖微粒对水溶液中铜离子吸附的动力学和吸附平衡。结果壳聚糖微粒吸附铜离子的最佳吸附条件是pH值为4.5～4.8、吸附时间为4h、温度为55℃。动力学研究结果显示,铜离子在壳聚糖上的吸附过程可以用准二级动力学方程描述(R2>0.987),吸附平衡数据可用Langmiur模型关联(R2>0.973)。结论壳聚糖微粒可有效去除水中铜离子。Objective Adsorption capability of chitosan（CS） microparticle for Cu^2＋ ions in water was studied.Methods The physicochemical properties of the CS microparticles were determined by SEM,the effects of different adsorption time（0-360 min）,temperature（25-55 ℃） and pH values（2-5） were studied.Adsorption kinetics and adsorption equilibrium were determined.Results The maximum adsorption capacity for Cu^2＋ ions occurred at pH 4.5-4.8,adsorption time was 4 h,temperature was 55 ℃.It was obtainted the sorption process followed the pseudo-second-order kinetic model（R^2〉0.987） and the adsorption equilibrium data obeyed the Langmuir equation（R^2〉0.973）.Conclusion Chitosan（CS） microparticle is an attractive candidate for removing Cu^2＋ ions from the wastewater.

关 键 词：壳聚糖 离子凝胶法 铜离子 吸附 

分 类 号：R123.3[医药卫生—环境卫生学]