Uranium sorption on bentonite modified by octadecyltrimethylammonium bromide

作者: Marek Majdan , Stanisław Pikus , Agnieszka Gajowiak , Dariusz Sternik , Emil Zięba

DOI: 10.1016/J.JHAZMAT.2010.08.089

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摘要: The sorption of U(VI) on octadecyltrimethyl-bentonite was investigated at the pH values aqueous phase ranging from 3 to 10 and concentrations U(VI): 0.1-1 mmol/dm(3). alkylammonium cation in bentonite were increased 21% 150% CEC (cation exchange capacity). It determined that modified bentonite, i.e. distribution constant -K(d) decreases with percent mineral modification until it attains a minimum 76% then increases again. effective found be range: 6-10 for explained as consequence anionic hydroxy complexes sorption. Both FT-IR XRD spectra analyzed provided arguments existence surfactant cations form monolayer bilayer interlamellar space bentonite. In turn luminescence suspensions, their character different pH, proved hydroxide-like planar polymeric species 9.

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