CHEMICAL TREATMENT OF SECONDARY WASTE SOLUTIONS RESULTING FROM WET OXIDATIVE DEGRADATION OF SPENT ION-EXCHANGE RESINS

摘要

The present experimental work has been carried out to evaluate the chemical treatment process of radioactive secondary waste solutions resulting from the wet oxidative degradation of simulated spent radioactive cation-exchange resins using hydrogen peroxide as oxidant. The present study aims mainly to evaluate the ability of ferrocyanide compound of nickel for selective fixation of radio-cesium from the secondary waste solution in presence of traces of soluble organic residues. Based on the data obtained, it was found that, using 5 x 10~(-3) M of nickel ferrocyanide, at pH range from 1-9 and in the presence of traces of soluble organic carbon, more than 99% of the radiocesium initially found could be efficiently removed from the secondary radioactive waste solutions under consideration.