Sorption of 85Sr, 137Cs, and 152Eu from solutions on mixed hexacyanoferrates of potassium and uranyl
文摘
Sorption of 85Sr, 137Cs, and 152Eu from neutral and acidic solutions on mixed hexacyanoferrates of potassium and uranyl K4(UO2)4[Fe(CN)6]3 · 4H2O and K2(UO2)5[Fe(CN)6]4 · 3H2O is studied. The distribution coefficients of 85Sr, 137Cs, and 152Eu between the solid phase of K2(UO2)5[Fe(CN)6]4 · 3H2O and the aqueous phase are determined to be 210±10, 3000±500, and 1100±250 ml g?1, respectively, at a contacting time of 120 min. For solid K4(UO2)4[Fe(CN)6]3 · 4H2O, the respective values are 6670±900, 5600±300, and 3300±250 ml g?1. The 85Sr, 137Cs, and 152Eu distribution coefficients K d between the solid K4(UO2)4[Fe(CN)6]3 · 4H2O and the aqueous phase decrease with decreasing pH.