Dissolution of [Ra-226]BaSO4 and partial separation of Ra-226 from radium/barium sulfate: A new treatment method for NORM waste from petroleum industry

摘要

Complete dissolution of [Ra-226]BaSO4 precipitate was successfully performed using NaNO2 as a reducing agent in acidic solution at room temperature. Results showed a significant effect of acid and NaNO2 concentrations and temperature on the dissolution efficiency. The method was successfully used for separation of radium from NORM scale samples from the petroleum industry; sufficient volume reduction of NORM waste was achieved. The obtained Ra-226 solution was purified using two separation methods. The dissolution method can be of great interest in the development of radiochemical analysis of radium isotopes. (C) 2015 Elsevier Ltd. All rights reserved.