胶原/纤维素/壳聚糖凝胶珠对水溶液中Ni^(2+)的吸附  

Collagen/Cellulose/Chitosan Hydrogel Beads for Ni^(2+) Adsorption from Aqueous Solution

作　　者：丁珊[1] 黄德智[1] 魏立纲[1] 李坤兰[1] 马英冲[1] 王琳琳[1] 王艳涛[1] 张倩[1] 

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034

出　　处：《高分子材料科学与工程》2015年第6期97-101,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21106011;21276034);辽宁省教育厅科学研究一般项目(L2012195)

摘　　要：在以离子液体1-丁基-3-甲基咪唑氯盐([C4mim]Cl)为溶剂,制备胶原和纤维素复合凝胶珠吸附剂过程中,加入少量壳聚糖对凝胶珠进行改性。吸附实验结果显示,胶原/纤维素/壳聚糖凝胶珠(CCHB-CS,质量比2/3/1)能有效吸附水溶液中的Ni 2+,相较于胶原/纤维素凝胶珠(CCHB,质量比1/1)和壳聚糖/纤维素凝胶珠(CCSHB,质量比1/1),CCHBCS对Ni 2+离子的吸附能力有所降低;溶液pH值会影响CCHB-CS对Ni 2+的吸附,pH7.0为最佳条件;Langmuir单分子吸附模型适用于描述CCHB-CS吸附行为。During preparation of collagen and cellulose composite hydrogel beads with ionic liquid 1-butyl-3-methylimidazolium chloride([C4mim]Cl)as solvent,adding chitosan significantly can improve mechanical properties and acid assistance of the beads.The formation of hydrogen bonds among collagen,cellulose,and chitosan molecules results in improvement of physical and chemical properties of the beads.Batch adsorption experimental results show that collagen/cellulose/chitosan hydrogel beads(CCHB-CS,mass ratio of 2/3/1)are effective biosorbents for Ni 2+adsorption.CCHB-CS has a relatively lower adsorption capacity for Ni 2+compared with collagen/cellulose hydrogel beads(CCHB,mass ratio of 1/1)and chitosan/cellulose hydrogel beads(CCSHB,mass ratio of 1/1)because hydrogen bond formation consumes the active sites.The CCHB-CS adsorption for Ni 2+is pH dependent,and pH 7.0is determined as the optimal condition.Furthermore,the adsorption behavior of CCHB-CS can be better described by the Langmuir isotherm model.

关 键 词：胶原 纤维素 壳聚糖 凝胶珠 NI 2+离子吸附 

分 类 号：O647.3[理学—物理化学]