Abstract

AbstractThe sorption of Sr and Cs has been investigated on Ca-Mg-bentonite preliminary treated by 0.1–1.0 m NaCl solutions at 25, 170–250°C during 0.5–7 months. The bentonite remained stable in these conditions. Moreover, hydrothermal treatment has raised the sorption activity of the bentonite. The treated bentonite has shown a strong selectivity for Sr and less pronounced one for Cs. The sorption of the elements increased with temperature and decreased with NaCl content more significant for Sr, than for Cs. The distribution ratio Rd was nearly independent on ion loading for Cs and strongly increased up to 104.5 mL/g in 10−2.0−10−0.5 meq/g ion loading interval for Sr, dropping sharply at more concentrations.

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