Coprecipitation of 137Cs and 85,90Sr radionuclides from aqueous solutions with the solid phases of CsBPh4 and [M(18-crown-6)]BPh4 (M = Na+, Cs+)

Abstract

The possibility of joint recovery of cesium and strontium radionuclides from their aqueous solutions with the solid phase of CsBPh4 or [M(18-crown-6)]BPh4 (M = Na+, Cs+) was examined. Depending on the solid phase composition, the degree of coprecipitation of 85,90Sr and 137Cs varies from 40 to 95%. The degree of coprecipitation of 85,90Sr and 137Cs from solutions with the solid phase of the complex compounds is 1.5–3 times higher than with the CsBPh4 phase. The kind of the anion (NO 3 − or Cl−) affects the coprecipitation of85,90Sr and 137Cs with the solid phase of the complex compounds [M(18-crown-6)]BPh4.