| Autor: | F. Macášek, P. Tkac, S. Skraskova, R. Kopunec |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
inorganic chemicals
Chemistry Health Toxicology and Mutagenesis Sodium Kinetics Public Health Environmental and Occupational Health chemistry.chemical_element Sorption complex mixtures Pollution Chemical reaction Analytical Chemistry Chemical kinetics Paper chromatography Nuclear Energy and Engineering Transition metal Soil water Radiology Nuclear Medicine and imaging Spectroscopy Nuclear chemistry |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 246:527-531 |
| ISSN: | 0236-5731 |
| DOI: | 10.1023/a:1006776503353 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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