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Adsorption properties of ionic species on cross-linked chitosans modified with catechol and salicylic acid moieties
Koji Oshita1, Toshio Takayanagi, Mitsuko Oshima
1Department of International Conservation Studies for Cultural Properties, Faculty of Cultural Properties, Kibi International University, Okayama, Japan. oshita@kiui.ac.jp
Abstract:
Catechol-type chitosan resin and salicylic acid-type chitosan resin were easily synthesized for use in estimating the adsorption behavior of 34 elements at pH 1 - 7 in aquatic media. The catechol-type chitosan resin could adsorb Cu(II) at pH 3 - 7, In(III) at pH 4 - 6, Pb(II) and lanthanoids at pH 5 - 7, and U(VI) at pH 4 - 7 more effectively than the salicylic acid-type chitosan resin and the cross-linked chitosan resin (base material). Adsorption ability was in the order: catechol-type chitosan resin > salicylic acid-type chitosan resin > cross-linked chitosan resin.
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