Adsorption Behavior of Cationic and Anionic Species on Chitosan Resins Possessing Amino Acid Moieties
Adsorption Behavior of Cationic and Anionic Species on Chitosan Resins Possessing Amino Acid Moieties
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DOI：
10.2116/analsci.23.1431
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发表时间：
2007-12
影响因子：
1.6
通讯作者：
K. Oshita;T. Takayanagi;M. Oshima;S. Motomizu
中科院分区：
文献类型：
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作者：
K. Oshita;T. Takayanagi;M. Oshima;S. Motomizu
以甘氨酸、缬氨酸、亮氨酸、丝氨酸等氨基酸为修饰剂，合成了几种壳聚糖树脂，研究了它们对阳离子和阴离子的吸附行为，并对水中微量元素的吸附性能进行了研究。甘氨酸在pH 7时用于镧系元素，亮氨酸在pH 1 - 5时用于钼，丝氨酸在pH 2 - 7时用于铀，氨基酸在pH 1 - 7时用于铋。阳离子和阴离子物种可以通过螯合机制和阴离子交换机制吸附。
Chitosan resins modified with amino acids, such as glycine, valine, leucine, and serine, were synthesized for investigating the adsorption behavior of cationic and anionic species, and showed good abilities for the adsorption of trace elements in aquatic media as follows: glycine for lanthanoids at pH 7, leucine for molybdenum at pH 1 - 5, serine for uranium at pH 2 - 7, and amino acids for bismuth at pH 1 - 7. Cationic and anionic species could be adsorbed by a chelating mechanism and an anion-exchange mechanism.