Abstract
The technetium sorption behaviour in different samples of soils was studied under aerobic conditions. Tc(VII) was reduced to Tc(IV) by Sn2+ ions. About 99% of reduced technetium is absorbed by the soils under investigation. Sorption of TcO4 − was studied in short-term (1-hour) and long-term (1-month) experiments. Sorption of TcO4 − in presence of sodium humate (Aldrich) was generally lower than from pure water (from 99% to 12%) and depends on the depth of origin of the ground. Immobilisation of TcO4 − after sorption on superficial sample of soils was studied by paper chromatography. Oxidation of Tc(IV) in presence of NO3 − and NO2 − (concentration range 10−1–10−5 mol·dm−3) ions was studied as a function of time and concentration of NO3 − and NO2 − ions. The content of Tc(IV) in NO3 − and NO2 − solutions decreases with time (46 hours) relatively slowly.
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Tkáč, P., Kopunec, R., Macášek, F. et al. Sorption of Tc(IV) and Tc(VII) on Soils: Influence of Humic Substances. Journal of Radioanalytical and Nuclear Chemistry 246, 527–531 (2000). https://doi.org/10.1023/A:1006776503353
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DOI: https://doi.org/10.1023/A:1006776503353