期刊
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
卷 308, 期 3, 页码 935-946出版社
SPRINGER
DOI: 10.1007/s10967-015-4525-3
关键词
Chitosan nano-particles; Isotherms; Kinetics; Magnetic adsorption; Uranium(VI)
资金
- National Natural Science Fund Program [21366001, 21166001, 11375043]
- International Scientific and Technological Cooperation Projects [2015DFR61020]
- National Undergraduate Training Program for Innovation and Entrepreneurship [201410405008]
The magnetic carboxymethyl chitosan nano-particles functionalized with ethylenediamine (EDA-MCCS) was synthesized for U(VI) adsorption. The EDA-MCCS showed high affinity and fast kinetic for U(VI) adsorption. The adsorption kinetic could be interpreted by the pseudo-second-order equation. The adsorption isotherm fitted well with the Langmuir equation, with the maximum sorption capacity of 175.4 mg g(-1) at 25 degrees C and pH 4.5. Thermodynamic parameters indicated the exothermic and spontaneous nature of U(VI) adsorption. The EDA-MCCS could be successfully regenerated using 0.20 M EDTA-0.10 M HNO3 as the eluent.
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