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- W2461689790 abstract "containing radionuclides was removed and utilized. The extraction of 137 Cs and 90 Sr ions from neutral aque� ous solutions with AN�221 and AN�511 anionites modifi ed with crown ethers was studied. The distribution coefficients were shown to increase in the series 12�crown�4 < 18�crown�6 < dicyclohexyl�18�crown�6 < 15�crown�5 for the extraction of 137 Cs and in the series 15�crown�5 < di cyclohexyl�18�crown�6 < 18�crown�6 < 12�crown�4 for the extraction of 90 Sr. The structural characteristics of the Cs and Sr complexes with crown ethers taken from the Cambridge Structural Database (2013 Release) were compared with the data on the extraction of 137 Cs and 90 Sr ions from aqueous solutions. The distances between the two complexing atoms (O–Cs or O–Sr) decreased as the corresponding distribution coefficients increased. The dependences of the resid� ual radioactivity ( 137 Cs and 90 Sr) on the number of depositions/removals of the polymer film on/from the surface were measured for different crown ethers. When crown ethers were added to the extracting solution (polymer film), the efficiency of decontamination increased by two orders of magnitude. The most effective additions were dicy� clohexyl�18�crown�6 and 15�crown�5 for 137 Cs and 12�crown�4 for 90 Sr. After three treatments of the surface with solutions (polymer films) with these additions, its radioactivity was close to background." @default.
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- W2461689790 date "2015-01-01" @default.
- W2461689790 modified "2023-09-24" @default.
- W2461689790 title "CHEMICAL PHYSICS OF ECOLOGICAL PROCESSES The Use of Macrocyclic Polyethers for Promoting the Dry Cleaning of the Surface from Radionuclides" @default.
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