Effects of organic acids on Eu(III) sorption on Na-bentonite
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Sorption of Eu(III) on Na-bentonite dispersed in sodium chloride media was studied as a function of pH via batch-type experiments. The sorption was found increased with the increasing pH. The sorption kinetics of Eu(III) on Na-bentonite in the absence and presence of different organic acids were described by pseudo-second-order model at pH 6.0 ± 0.1. The effects of different types of organic acids on the sorption of Eu(III) to Na-bentonite were extensively investigated. It was found that the concentration ratio of Eu(III) to ligand is a critical factor to the effect of an organic acid on Eu(III) sorption.
KeywordsOrganic acid Eu(III) Bentonite Sorption
The financial support by the National Natural Science Foundation of China (No. 91226113) is gratefully appreciated.
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