REMOVAL METHOD OF RADIUM RADIONUCLIDES IN PHOSPHPGYPSUM

摘要

PURPOSE: A decontamination method of radium nuclides in phosphogypsum is lower waste liquid treatment cost and enhance collection rate of recycling phosphogypsum. CONSTITUTION: A decontamination method of radium nuclides in phosphogypsum comprises: a step of mixing decontamination solution with phosphogypsum; and a step of performing decontamination of radium nuclides. The decontamination solution contains 0.35-35% of nitric acid solution of low concentration as main decontaminating agent, 0.01-5 wt% of H2O2 or 10-1000ppm of ozon as an oxidant, and 0.001-5wt% of radium nuclides separating agent.