Extraction of cesium and americium with p-alkylcalix[8]arenes from alkaline solutions
| Autor: | S. R. Zaripov, Igor V. Smirnov, E. S. Stepanova, N. M. Ivenskaya, S. E. Solov’eva, Igor S. Antipin, M. Yu. Tyupina, S. R. Kleshnina |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Inorganic chemistry Extraction (chemistry) Aqueous two-phase system chemistry.chemical_element Americium 010402 general chemistry 010403 inorganic & nuclear chemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Monomer chemistry Phase (matter) Calixarene Physical and Theoretical Chemistry Solubility Alkyl |
| Zdroj: | Radiochemistry. 58:381-388 |
| ISSN: | 1608-3288 1066-3622 |
| DOI: | 10.1134/s1066362216040068 |
| Popis: | Previously unknown isononylcalix[8]arene was synthesized from commercially available isononylphenol. The properties of the product (solubility, extraction ability, tendency to aggregation) were compared with those of the known tert-butylcalix[8]arene. The extraction of 137Cs, 99m Tc, and 241Am from alkaline carbonate solutions with solutions of p-alkylcalix[8]arenes (alkyl = tert-butyl, isononyl) in tetrachloroethylene was studied. The dependence of the distribution ratios on pH of the aqueous phase in the interval from 11 to 13.9 and on the nature of functional groups in the calixarene core was determined. The composition of extractable solvates of cesium and americium with calix[8]arenes was found. Calix[8]arenes extract cesium from alkaline solutions more efficiently than p-tert-butylphenol, their nonmacrocyclic analog, does. tert-Butylcalix[8]arene exhibits the highest performance, which may be due to formation of aggregates 5.7 ± 0.8 nm in diameter in the organic phase at pH 13.5 of the aqueous phase. The isononyl derivative exists in the monomeric form (particle diameter 1.9 ± 0.5 nm). |
| Databáze: | OpenAIRE |
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