Abstrait

Adsorption of 137Cs, 85Sr and (152+154) Eu onto polyaniline stannic silicomolybdate in aqueous chloridemedium

N.El-Said,H.F.Ali,A.T.Kassem

Adsorption and Separation of 85Sr, 152+154Eu and activation product of 137Cs from radioactive waste (radioactive waste our Laboratories from Egyption (ET-RR1) research reactor) was achieved, these elements are considered as hazardous materials adsorbed using polyaniline stannic silicomolybdate was developed. Interactions of 137Cs(I), 152,154Eu(III), and 85Sr(II) ions from HCl acid solutions with polyaniline stannic silicomolybdate matrix, dried at 50±0.10C, 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) > Sr(II). The break through capacities of polyaniline stannic silicomolybdate for 137Cs(I), 152,154Eu(III), and 85Sr(II) was determined and the adsorption yield of these isotopes were found to be 94.6%, 92.6% and 87% respectively. The capacity was determined to be 2.5 meq/g from results obtained in Freundlich and D-R isotherms. Adsorption capacities and mean energies calculated from D-R isotherm parameters decreased by increasing ionic strength of the prepared exchanger. The activated energy calculated fromArheniouswas found to be 20.7, 18.6,16.9 KJmol-1 for 137Cs, 85Sr and 152+154 Eu respectively.