PRECIPITATION BEHAVIOR OF URANIUM IN MULTICOMPONENT SOLUTION BY OXALIC-ACID

A study on the precipitation of uranium by oxalic acid was carried out in a multicomponent solution. The precipitation method is usually app lied to the treatment of radioactive waste and the recovery of uranium from a uranium-scrap contaminated with impurities. In these cases, th e problem is how to increase the precipitation yield of target element and to prevent impurities from coprecipitation. The multicomponent so lution in the present experiment was prepared by dissolving U, Nd, Cs and Sr in nitric acid. The effects of concentrations of oxalic acid an d ascorbic acid on the precipitation yield and purity of uranium were observed. As results of the study, the maximum precipitation yield of uranium is revealed to be about 96.5% and the relative precipitation r atio of Nd, Cs and Sr versus uranium are discussed at the condition of the maximum precipitation yield of uranium, respectively.