壳聚糖乙酸酯冠醚对金属离子的吸附性能研究  

Study on The Adsorption Properties for Metal Ionsof Chitosan Acetate Crown Ethers*

作　　者：谭淑英[1] 汪玉庭[1] 唐玉蓉[2] 

机构地区：[1]武汉大学环境科学系 [2]武汉大学分析测试中心

出　　处：《环境科学》1999年第3期59-62,共4页Environmental Science

基　　金：国家自然科学基金

摘　　要：利用壳聚糖Ｃ２位上活泼氨基与苯甲醛进行反应，制得了Ｓｃｈｉｆ碱苯甲醛壳聚糖（简称ＣＴＢ），再将合成的二苯并１６－冠－５氯代乙酸酯冠醚接枝到ＣＴＢ上，得到壳聚糖－苯甲醛－二苯并１６－冠－５乙酸酯冠醚（简称ＣＴＢＣ），使其在酸性条件下脱去苯甲醛，制得壳聚糖－二苯并１６－冠－５乙酸酯冠醚（简称ＣＴＣＥ）．经元素分析、红外光谱分析表征了其结构．并研究了ＣＴＢＣ和ＣＴＣＥ对Ｐｂ２＋、Ｃｕ２＋、Ｃｒ３＋、Ｎｉ２＋和Ｃｄ２＋的吸附性能，结果表明：ＣＴＢＣ比ＣＴＣＥ的吸附容量低。The C2 amino group in chitosan is protected from the reaction between benzaldehyde and chitosan to form Nbenzylidene chitosan (CTB). After the reaction with dibenzo 16c5 chloracetate crown ether, the Schiff base is removed by reacting chitosanbenzaldehhydedibenzo 16c5 acetate crown ether (CTBC) and dilute ethanolic hydrochloride solution, whose structures are confirmed by elemental analysis and FTIR spectra analysis. Their adsorption properties for Pb2+, Cu2+, Cr3+, Ni2+and Cd2+were studied, the result shows that adsorption capacities of CTCE is higher than CTBC, and the adsorption capacities of CTCE and CTBC and higher than CTB.

关 键 词：壳聚糖 冠醚 吸附性能 金属离子 

分 类 号：X131[环境科学与工程—环境科学]