Nature of Strontium Extraction by Synergistic Mixtures of Chlorinated Cobalt Dicarbollide and Polyethers Full article
Conference |
14th Radiochemical Conference 14-19 Apr 2002 , Marianske Lazne |
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Journal |
Czechoslovak Journal of Physics
ISSN: 0011-4626 , E-ISSN: 1572-9486 |
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Output data | Year: 2003, Volume: 53, Pages: A501-A508 Pages count : 8 DOI: 10.1007/s10582-003-0064-1 | ||||
Tags | Strontium; 18C6; Hydrate Shell; Chlorinate Cobalt Dicarbollide; Oxyethyl Group | ||||
Authors |
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Affiliations |
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Funding (1)
1 | United States Department of Energy | 81995 |
Abstract:
Extraction of strontium by synergistic mixtures of chlorinated cobalt dicarbollide (DCC) with different polyethers was studied. In the acidic media the distribution coefficients (DSr) decreases in the order 15-crown-5>PEG-400>18-crown-6 and does not correspond to the row of constants stability of the strontium complexes with these polyethers. When passing to the salt media (Li and Na nitrates) the row of DSr is change: PEG-400>18 crown 6>15 crown 5.
IR-spectroscopy study has shown that in synergistic mixtures the proton forms [H5O2+PEG], [H5O2+(15-crown-5)2] and [H3O3+(18 crown 6)] cations, which are exchange on Sr2+ resulting to formation [Sr2+PEG], [Sr2+(15-crown-5)2] and [Sr2+(18-crown-6)(H2O)n] cations correspondingly. The PEG-400 is the best among polyethylene glycols, since its all six COC groups and two even more active OH groups complete the first co-ordination sphere of Sr2+. Extremely low extractability of Sr2+ from acidic media in the presence of 18-crown-6 as compared with 15-crown-5 is mainly caused by the high stability of the [H3O+(18-crown-6)] cation that is responsible for less extractable hydrated Sr complex formation.
Cite:
Smirnov I.V.
, Stoyanov E.S.
, Vorob'eva T.P.
Nature of Strontium Extraction by Synergistic Mixtures of Chlorinated Cobalt Dicarbollide and Polyethers
Czechoslovak Journal of Physics. 2003. V.53. P.A501-A508. DOI: 10.1007/s10582-003-0064-1 WOS РИНЦ
Nature of Strontium Extraction by Synergistic Mixtures of Chlorinated Cobalt Dicarbollide and Polyethers
Czechoslovak Journal of Physics. 2003. V.53. P.A501-A508. DOI: 10.1007/s10582-003-0064-1 WOS РИНЦ
Dates:
Published print: | Jan 1, 2003 |
Identifiers:
Web of science | WOS:000184406200014 |
Elibrary | 30717681 |
Chemical Abstracts | 2003:649364 |
Chemical Abstracts (print) | 139:354939 |
OpenAlex | W1975632619 |