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Sabarudin, Akhmad Department of Chemistry, Faculty of Science, Okayama University
大島 光子 Department of Chemistry, Faculty of Science, Okayama University
Takayanagi, Toshio Department of Chemistry, Faculty of Science, Okayama University
Hakim, Lukman Department of Chemistry, Faculty of Science, Okayama University
Oshita, Koji Department of International Conservation Studies, Faculty of International and Industrial Studies, Kibi International University
Gao, Yun Hua Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
本水 昌二 Department of Chemistry, Faculty of Science, Okayama University
A chitosan resin derivatized with 3,4-dihydroxybenzoic acid moiety (CCTS-DHBA resin) was newly synthesized for the collection/concentration of trace uranium by using cross-linked chitosan (CCTS) as base material, and the adsorption behavior of uranium as well as 60 elements on the resin was examined by passing the sample solutions through a mini-column packed with the resin. After the elution of the collected elements on the resin with 1M HNO3, the eluates were measured by inductively coupled plasma-mass spectrometry (ICP-MS). The CCTS-DHBA resin can adsorb several metal cations and several oxoanionic elements at appropriate pH. Among these metal ions, uranium shows an excellent adsorption behavior on this resin. Uranium as UO22+ species can be adsorbed on the resin by chelating mechanism with adsorption capacity of 330 mg g(-1) resin. Through the column treatment, the complete removal of large amounts of alkali and alkaline earth matrices without any loss of adsorption efficiency over prolonged usage were achieved with this resin. The CCTS-DHBA resin was applied to the adsorption/collection of uranium in tap water, river water and seawater samples with satisfactory results. The validation of the proposed method was carried out by analyzing uranium in the standard reference materials of SLRS-4, CASS-4, and NASS-5 after passing through the CCTS-DHBA resin, and the results showed good agreement with the certified values.
Inductively coupled plasma-mass spectrometry
Analytica Chimica Acta
Elsevier Science B.V.
Elsevier Science B.V.
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