TITLE

Influence of contact time, pH, soil humic/fulvic acids, ionic strength and temperature on sorption of U(VI) onto MX-80 bentonite

AUTHOR(S)
Xuemei Ren; Suowei Wang; Shitong Yang; Jiaxing Li
PUB. DATE
January 2010
SOURCE
Journal of Radioanalytical & Nuclear Chemistry;Jan2010, Vol. 283 Issue 1, p253
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The sorption of U(VI) from aqueous solution on MX-80 bentonite was studied as a function of contact time, pH, ionic strength, solid contents, humic acid (HA), fulvic acid (FA) and temperature under ambient conditions using batch technique. The results indicate that sorption of U(VI) on MX-80 bentonite is strongly dependent on pH and ionic strength. The removal of U(VI) to MX-80 bentonite is rather quick and the kinetic sorption data is simulated well by a pseudo-second-order rate equation. The presence of HA enhances the sorption of U(VI) on MX-80 bentonite obviously, but the influence of FA on U(VI) sorption is not obvious. The thermodynamic parameters (Δ H0, Δ S0, and Δ G0) for the sorption of U(VI) calculated from temperature dependent sorption suggest that the sorption reaction is endothermic and spontaneous.
ACCESSION #
47734819

 

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