阳离子和阴离子物种在具有氨基酸部分的壳聚糖树脂上的吸附行为。

Adsorption behavior of cationic and anionic species on chitosan resins possessing amino acid moieties.

作者信息

Oshita Koji, Takayanagi Toshio, Oshima Mitsuko, Motomizu Shoji

机构信息

Department of International Conservation Studies for Cultural Properties, Faculty of Cultural Properties, Kibi International University, Takahashi, Okayama 716-8508, Japan.

出版信息

Anal Sci. 2007 Dec;23(12):1431-4. doi: 10.2116/analsci.23.1431.

DOI:10.2116/analsci.23.1431

PMID:18071231

Abstract

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.

摘要

合成了用甘氨酸、缬氨酸、亮氨酸和丝氨酸等氨基酸改性的壳聚糖树脂，以研究阳离子和阴离子物种的吸附行为，结果表明这些树脂在水生介质中对微量元素具有良好的吸附能力，具体如下：甘氨酸在pH值为7时对镧系元素有吸附作用，亮氨酸在pH值为1至5时对钼有吸附作用，丝氨酸在pH值为2至7时对铀有吸附作用，氨基酸在pH值为1至7时对铋有吸附作用。阳离子和阴离子物种可通过螯合机制和阴离子交换机制被吸附。