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- Title
Sorption of Co, Cs, Sr and I onto argillaceous rock as studied by radiotracers.
- Authors
Mell, P.; Megyeri, J.; Riess, L.; Máthé, Z.; Csicsák, J.; Lázár, K.
- Abstract
Sorption of60Co,85Sr, 137Cs and125I have been studied on samples originated from Boda (siltstone-) claystone formation (BCF) (Hungary). The distribution of K dvalues have been determined in static batch experiments using natural groundwater. The order of sorption of isotopes was Co>Cs>Sr>I, where iodine exhibits sorption properties in a modest extent. The sorption isotherm was determined for Cs from measurements carried out in 10-5-10-1M initial concentration range. The isotherm can be described with non-linear Freundlich approximation in the range of</o:p> 10-7-10-4M equilibrium concentration. At concentrations >10-2M the isotherm achieves saturation. Hence, it is suggested that sorption of Cs on BCF is dominated by cation-exchange reactions on the illite mineral component. In the case of Co and Sr, precipitation reactions occurred during the experiments performed with carrier-containing solutions. This can be attributed to the low values of solubility product constants of SrCO3, SrSO4and Co(OH)2, formed from anions present in the natural groundwater.
- Subjects
ROCKS; RADIOACTIVE tracers; ABSORPTION; TONSTEINS; PHYSICAL &; theoretical chemistry
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2006, Vol 268, Issue 2, p405
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-006-0177-7