辐射防护2025，Vol.45Issue(4)：362-370,9.
含磷材料对碱性锆渣中U的稳定化作用研究
Study on the stabilizing effect on Uranium in alkaline zirconium residue with phosphorus containing materials
摘要
Abstract
Taking alkaline zirconium residue as the research object,different phosphorus containing materials were used to stabilize Uranium in alkaline zirconium residue,with the aim to analyze the stabilization effects and mechanisms.The result shows that among several phosphorus containing materials used in the experiment,Ca(H2PO4)2,KH2PO4,CaHPO4,and Ca3(PO4)2 can all achieve stabilization effects,while Ca(H2PO4)2 and KH2PO4 having the best stabilization effect on Uranium,with stabilization efficiency of 98.35％and 99.59％,respectively.K2HPO4 can promote Uranium activation leaching in alkaline zirconium residue,which is related to the generation of HCO3-in alkaline conditions.The stabilization principle of Ca(H2PO4)2 and KH2PO4 is to promote the transition from carbonate bound state and organic bound state Uranium to residual state.The stabilization effect is greatly affected by the acidity and alkalinity of the environment,and acidic conditions are more conducive to its stabilization.The stabilizing effect of Ca(H2PO4)2 and KH2PO4 on Uranium in alkaline zirconium residue is positively correlated with the dosage.The optimal dosage of Ca(H2PO4)2 and KH2PO4 is 1.2％,After stabilization,the proportion of residual state Uranium is about 98.6％.HCO3-is the main factor affecting the long-term stability of Uranium.Within about 90 days,HCO3-can cause the stable Uranium in alkaline zirconium residue to leach out again.Ca(H2PO4)2 and KH2PO4 can effectively inhibit the activation leaching of U in alkaline zircon residue by HCO3-,and the inhibitory effect of Ca(H2PO4)2 is better than that of KH2PO4.关键词
碱性锆渣/含磷材料/U/稳定化/HCO3-Key words
alkaline zirconium residue/phosphorus containing materials/Uranium/stabilization/HCO3-分类
能源科技引用本文复制引用
高扬,孙娟,武旭阳,任丽江,安毅夫,张昊岩..含磷材料对碱性锆渣中U的稳定化作用研究[J].辐射防护,2025,45(4):362-370,9.基金项目
中国铀业有限公司-东华理工大学核资源与环境国家重点实验室联合创新基金项目(编号2023NRE-LH-02). （编号2023NRE-LH-02）
