壳聚糖交联聚甲基丙烯酸水凝胶对二价铜离子的吸附  

Adsorption of Cu^(2+) Ions on Chitosan-crosslinked Poly (methylacrylic acid) Hydrogels

作　　者：李芮[1] 马晓梅[1] 赵昔慧[1] 范群[1] Li Rui Ma Xiaomei Zhao Xihui Fan Qun(College of Chemical and Engineering, Qingdao University, Qingdao 266071, China)

机构地区：[1]青岛大学化学化工学院,山东青岛266071

出　　处：《山东化工》2017年第8期22-25,共4页Shandong Chemical Industry

基　　金：国家自然科学基金(No.51503110)~~

摘　　要：以甲基丙烯酸为单体、壳聚糖为交联剂、过硫酸钾为引发剂,通过自由基聚合制备了聚甲基丙烯酸水凝胶,利用扫描电镜对水凝胶内部结构进行表征。考察了Cu^(2+)质量浓度、水凝胶质量、水凝胶中壳聚糖质量分数、溶液pH值、吸附温度及时间等不同条件对水凝胶吸附Cu^(2+)吸附量的影响。发现当Cu^(2+)质量浓度越大、水凝胶质量越小、吸附时间越长时,水凝胶对Cu^(2+)吸附量越大;壳聚糖质量分数为7%、吸附溶液pH值为6、吸附温度为25℃时,水凝胶对Cu^(2+)吸附量较大。Poly （methylacrylic acid） hydrogel was synthesized by free radical polymerization where methylacrylic acid （MAA）,chitosan（CS） and potassium persulfate （KPS） were used as monomer, cross -linking agent and initiator. The internalmicrostrncture of hydrogels was investigated by scanning electron microscopy. The factors that irffluenced the adsorping capacity ofCu2＋ were investigated, including the concentration and pH of CuSO4 solution, the adsorption time and temperature, the CSconcentration and the mass of hydrogel. The results showed that the adsorption capacity of Cu2＋ increased with the increase of CuSO4 solutions concentration or the adsorption time and the decrease mass of hydrogel. The results also showed that theadsorption capacity of Cu2＋ was better when the CS weight percentage was 7%, the pH of CuSO4 solution was 6 and theadsorption temperature was 25 ℃.

关 键 词：壳聚糖 聚甲基丙烯酸 微观结构 吸附 

分 类 号：X703[环境科学与工程—环境工程]