期刊
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
卷 302, 期 1, 页码 331-340出版社
SPRINGER
DOI: 10.1007/s10967-014-3125-y
关键词
Magnetic resins; Chitosan; Competitive adsorption; Uranium(VI); Thorium(IV)
资金
- National Natural Science Fund Program [21366001, 21166001]
- Scientific Research Fund from Education Bureau of Jiangxi [GJJ14390]
The triphosphate-crosslinked magnetic chitosan resins (TPP-MCR) with a diameter range of 200-350 nm were synthesized for the adsorption of U(VI) and Th(IV) ions from aqueous solutions. The adsorption experiments were conducted in both mono-component systems with pure actinide solution and bi-component systems with different U/Th mass ratios. The maximum adsorption capacities in mono-component systems determined by Langmuir model were 169.5 and 146.8 mg g(-1) for U(VI) and Th(IV), respectively. In bi-component systems, U(VI) and Th(IV) adsorption capacities were reduced significantly, and the combined sorption capacities were substantially lower (almost halved) compared to those obtained by the addition of sorption capacities using mono-component solutions, indicating that U(VI) and Th(IV) compete for the same sorption sites. Adsorption-desorption experiments for five cycles illustrated the feasibility of the repeated use of TPP-MCR for the adsorption of U(VI) and Th(IV) ions.
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