Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 308, Issue 2, Pages 545-554Publisher
SPRINGER
DOI: 10.1007/s10967-015-4453-2
Keywords
Uranium(VI); Fe-Mn binary oxide; Adsorption; Organic acids; Desorption
Funding
- National Fund for Fostering Talents of Basic Science [J1210004]
- State 863 project of China [2012AA063503]
- National Natural Science Foundations of China [11475120, 10776021, 21271132, CY112C018]
- Comprehensive training platform of specialized laboratory, College of Chemistry in Sichuan University (Chengdu, China)
- Analytical AMP
- Testing Center, Sichuan University (Chengdu, China)
- Engineering Research Center in Biomaterials, Sichuan University (Chengdu, China)
- University of Macau (Taipa, Macau)
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The adsorption and desorption behaviors of uranium(VI) by a synthetic Fe/Mn (mass ratio of 57:1) binary oxide (FMBO) has been investigated. The pseudo-second-order kinetic and the Dubinin-Radushkevich isotherm models showed.that the adsorption process involved chemical adsorption. The calculated thermodynamic parameters (Delta HA degrees, Delta SA degrees, Delta GA degrees) indicated that the adsorption process of uranium(VI) onto FMBO was spontaneous and endothermic. The desorption experiments indicated that the high desorption rate of uranium(VI) from FMBO by organic acids would increase the total solubility of uranium (in the exchangeable form), which would in turn enhance bio-absorption of uranium from soil via phytoremediation.
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