Abstract
The capacity of bentonite and purified bentonite to remove UO 2+2 ions from aqueous solutions has been investigated. The UO 2+2 uptake in these clays was determined for 0.2 and 0.002M uranyl nitrate solutions. It was found that under these conditions (0.2M) the maximum UO 2+2 uptake was 1.010±0.070 meq UO 2+2 /g of bentonite and 0.787±0.020 meq UO 2+2 /g of purified bentonite. In purified bentonite UO 2+2 sorption is irreversible up to 50 hours as no desorption was observed. Such is not the case in the natural bentonite. X-ray diffraction, thermal analyses, and transmission electron microscopy were used to characterize the solids. The uranium content was determined by neutron activation analysis.
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Olguin, M.T., Solache-Rios, M., Acosta, D. et al. UO 2+2 sorption on bentonite. J Radioanal Nucl Chem 218, 65–69 (1997). https://doi.org/10.1007/BF02033975
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DOI: https://doi.org/10.1007/BF02033975