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Sorption of Co, Cs, Sr and I onto argillaceous rock as studied by radiotracers</p> </p>

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Summary

Sorption of60Co,85Sr,  137Cs and125I have been studied on samples originated from Boda (siltstone-) claystone formation (BCF) (Hungary). The distribution of Kdvalues 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></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.</p> </p>

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Authors and Affiliations

  1. Institute of Isotopes, CRC, HAS; Institute for Expert Services, SSNS, P.O. Box 77, H-1525 Budapest, Hungary; P.O. Box 710/3, H-1399 Budapest-62, Hungary

    P. Mell

  2. Institute of Isotopes, CRC, HAS, P.O. Box 77, H-1525 Budapest, Hungary

    J. Megyeri

  3. Institute of Isotopes, CRC, HAS, P.O. Box 77, H-1525 Budapest, Hungary

    L. Riess

  4. Mecsekérc Co., Esztergár L. 19, H-7633, Pécs, Hungary

    Z. Máthé

  5. Mecsekérc Co., Esztergár L. 19, H-7633, Pécs, Hungary

    J. Csicsák

  6. Institute of Isotopes, CRC, HAS, P.O. Box 77, H-1525 Budapest, Hungary

    K. Lázár

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  1. P. Mell
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  2. J. Megyeri
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  3. L. Riess
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  4. Z. Máthé
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  5. J. Csicsák
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  6. K. Lázár
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Mell, P., Megyeri, J., Riess, L. et al. Sorption of Co, Cs, Sr and I onto argillaceous rock as studied by radiotracers</p> </p> . J Radioanal Nucl Chem 268, 405–410 (2006). https://doi.org/10.1007/s10967-006-0177-7

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  • DOI: https://doi.org/10.1007/s10967-006-0177-7

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