Sorption of Cesium and Strontium on Montmorillonite and Kaolinite

Abstract

Sorption characteristics of Cs+ and Sr++on montmorillonite and kaolinite type clays and soil fractions from various regions of Turkey were studied using the batch method. 137Cs and 90Sr were used as tracers. Concentrations of Cs+ and Sr++ ions ranged from 10-8to 10-2 mol/1; natural groundwater was used and the grain size of the solid particles was < 20 yμm. Equilibrium was reached in 4 - 7 days for Cs+and 7 - 11 days for Sr++. The distribution coefficient, RD, increased with decreasing grain size, suggesting mainly a surface phenomenon. The sorption isotherms were non-linear suggesting at least two different sorption processes. The sorption was found to be predominantly reversible. Cs+ was sorbed much stronger than Sr++in all samples. © 1988, Walter de Gruyter. All rights reserved

Radiocaesium soil-to-wood transfer in commercial willow short rotation coppice on contaminated farm land

“…This is reflected in the small RIP of the Tro¨dje soils. In kaolinite (1:1 type clay minerals) no specific Cs-binding sites are present (Komarneni, 1978;Erten et al, 1988). Radiocaesium is thus easily extracted from these soils and ageing (radiocaesium diffusion to the 1.0 nm interlayers) will be very small for the Tro¨dje soils.…”

Removal behavior of hydrous manganese oxide and hydrous stannic oxide for Cs(I) ions from aqueous solutions

“…Yu et al [13] observed that the removal of Cs on Na 4 Ti 4 SiO 10 from simulated high level liquid waste (HLLW) is controlled by ion exchange and the best HNO 3 concentration for Cs + removal from HLLW is 1 mol/L. Removal of Cs(I) and Sr(II) on montmorillonite and kalonite studied by Erten et al [14] showed a non linearity of sorption isotherms indicating the involvement of two different adsorption processes. Adsorption of Cs on ammonium molybdophosphate-alumina (AMP-Al 2 O 3 ) was introduced as a new inorganic exchanger following Langmuir and Freundlich isotherms with exothermic nature [15].…”

“…Gadde and Laitinen [22] studied the adsorption of lead, cadmium, zinc and thallium ions on hydrated iron, manganese and aluminium oxides with a view to assess the role of oxides in regulating the concentration of these biologically toxic metals in water. Although a good number of papers have been published on Cs uptake [7,8,14,[18][19][20], these in general lack with reference to systematic parametric studies. The present paper is an attempt to proceed/study further the uptake of Cs(I) ions on hydrous manganese and hydrous stannic oxides with special attention to effects of adsorptive concentration, temperature, coions and radiation stability of the adsorbents.…”

Sorption studies of Cs+ and Ba2+ cations on magnesite

“…Detailed work examining the sorption/desorption behavior of Cs + and Ba 2+ ions on dierent clays and soil fractions from various regions of Turkey was carried out (Erten et al, 1988;Eylem et al, 1990) In those studies, sorption of Cs + and Ba 2+ cations on magnesite was examined as a function of time, cation concentration and temperature. The interaction of Cs + with various soil fractions is of considerable interest in radioactive waste considerations.…”