Abstract
A procedure for removal and separation of Cs, Eu and activation product of Co using zirconium selenomolybdate was developed. Interactions of134Cs(I),152,154Eu(III), and60Co(II) ions from HNO3acid solutions with zirconium selenomolybdate matrix, dried at 50°C, have been individually investigated by the batch equilibration method. The sorption behavior of the three ions showed a selectivity sequence in the following order: Cs(I) > Eu(III) > Co(II). The breakthrough capacities of zirconium selenomolybdate for Cs(I), Eu(III) and Co(II) were found to be 0.82, 0.45, and 0.18 mmol/g of the sorbent, respectively. A mixture of the three radionuclides (1×10−2 M each) in 140 mL of1×10−2 M HNO3solution was passed through 1 g zirconium selenomolybdate chromatographic column. Thereafter, quantitative elution of the retained Co(II) was achieved with 14 mL of1×10−1 M HNO3acid solution leaving Eu(III) and Cs(I) strongly retained onto the column. Quantitative elution of Eu(III) was achieved by passing 22 mL2.5×10−1 M HNO3. About 89% of the retained Cs(I) was eluted with 32 mL of 2 M NH4Cl solution at a flow rate of 0.5 mL/min.
Highlights
El-SaidRadioactive Isotopes and Generators Department, Hot Laboratories Center, Atomic Energy Authority, Cairo 13759, Egypt
Synthetic inorganic sorbents have many advantages over organic ones. ese advantages include high selectivity to ions of some elements of potential bene ts, rapid rate of uptake, stability towards high temperature and ionizing radiation doses, and acidic and moderately alkaline media [1, 2]
Inorganic ion exchangers can be used for treatment of industrial effluents to remove some toxic heavy metals which are frequently found in these effluents [15–21]. e proper choice is limited to a number of factors such as chemical composition of the medium, reactivity of the radionuclides present and in turn selectivity of the sorbent, solution concentration, pH, and temperature
Summary
Radioactive Isotopes and Generators Department, Hot Laboratories Center, Atomic Energy Authority, Cairo 13759, Egypt. A procedure for removal and separation of Cs, Eu and activation product of Co using zirconium selenomolybdate was developed. N s we istohrpzitrioconnbiuehmavsieolernoofmthoelytbhdreaeteiomnastsrhixo,wderideda selectivity sequence in the following order: Cs(I) > Eu(III) > Co(II). E breakthrough capacities of zirconium selenomolybdate for Cs(I), Eu(III) and Co(II) were found to be 0.82, 0.45, and 0.18 mmol/g of the sorbent, respectively. × 10−2 M elution of HNO3 solution was passed through 1 g the retained Co(II) was achieved with 14 zirconium selenomolybdate mL of 1 × 10−1 M HNO3 acid solution leaving Eu(III) and Cs(I) strongly retained onto the column. Quantitative elution of Eu(III) was achieved by passing 22 mL. About 89% of the retained Cs(I) was eluted with 32 mL of 2 M NH4Cl solution at a ow rate of 0.5 mL/min
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