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ID 19940
フルテキストURL
著者
Oshita, Koji 岡山大学
大島 光子 岡山大学
Gao, Yun-hua 岡山大学
Lee, Kyue-Hyung Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
本水 昌二 岡山大学
抄録
Cross-linked chitosan was synthesized with chitosan and ethylene glycol diglycidyl ether. The adsorption behavior of trace amounts of metal ions on the cross-linked chitosan was systematically examined by packing it in a mini-column, passing a metal solution through it and measuring metal ions in the effluent by ICP-MS. The cross-linked chitosan adsorbed mercury and precious metals (Pd, Pt, and Au) at pH values from acidic to neutral. Especially, mercury in concentrated hydrochloric acids could be adsorbed on cross-linked chitosan quantitatively by an anion-exchange mechanism in the form of a stable chloride complex. This method was applied to the removal of mercury from commercially available hydrochloric acid; more than 97% of mercury was removed, and the residual mercury in the hydrochloric acid (Grade: for trace analysis) was found to be 0.15 ppb. Mercury adsorbed on the cross-linked chitosan could be easily desorbed with an eluent containing 1 M hydrochloric acid and 0.05 M thiourea. The thus-refreshed crosslinked chitosan could be repeatedly used for the removal of mercury in hydrochloric acid.
発行日
2002-10-10
出版物タイトル
Analytical Sciences
18巻
10号
出版者
日本分析化学会
開始ページ
1121
終了ページ
1125
ISSN
0910-6340
NCID
AA10500785
資料タイプ
学術雑誌論文
言語
English
OAI-PMH Set
岡山大学
著作権者
日本分析化学会
論文のバージョン
publisher
DOI