摘要
开展了离子浮选法分离酸性水溶液中铀的试验研究。结果表明,采用十六烷基三甲基溴化铵作为捕收剂及起泡剂,随着溶液pH值从3升高到7,铀的去除率先增加后减少,且Na_(2)CO_(3)的添加对铀的去除率有显著的提高。在pH值大于5时,铀酰离子和碳酸根离子开始转变为UO_(2)(CO_(3))_(2)^(2-)及UO_(2)(CO_(3))_(3)^(4-),而这些络合阴离子可与溶液中的CTA^(+)相互作用。使用阳离子活性剂作为捕收剂,可防止难形成络合阴离子的其它金属离子混入,有利于提高溶液中铀分离的选择性。
The separation of uranium from acid aqueous solution by ion flotation was studied in this work.Cationic surfactant cetyltrimethyl ammonium bromide(CTAB)was used as collector and foaming agent.The results show that the removal of uranium increases first and then decreases as the pH value of the solution increases from 3to 7.It is found that the addition of Na_(2)CO_(3)has a significant effect on the removal rate of uranium under acidic conditions.It is believed that with the addition of carbonate ions,uranyl ions begin to transform into UO_(2)(CO_(3))_(2)^(2-)and UO_(2)(CO_(3))_(3)^(4-)under the condition of pH value greater than 5.These complex anions can interact with CTA^(+)in solution.The cationic active agent as collector can prevent other metal ions which are difficult to form complex anions from mixing,it is beneficial to improve the selectivity of uranium separation in solution.Thus,cationic collector based ion flotation method has great application.
作者
胡鹏飞
李成哲
林观清
郭兆佳
莫祖丽
HU Peng-fei;LI Cheng-zhe;LIN Guan-qing;GUO Zhao-jia;MO Zu-li(School of Resource&Environment and Safety Engineering,University of South China,Hengyang 421001,China)
出处
《武汉理工大学学报》
CAS
2024年第1期43-47,共5页
Journal of Wuhan University of Technology
基金
湖南省大学生创新创业训练计划项目(S202210555330)
湖南省教育厅科学研究一般项目(21C0279).
关键词
离子浮选
含铀废水
阳离子捕收剂
浮选动力学
ion flotation
uranium containing wastewater
cationic collector
flotation kinetics
