含铀有机废液中微量铀的回收  

Recovery of Trace Uranium in Organic Waste Liquid

作　　者：郭倚天 陈庆德[1] 沈兴海[1] 邹乐西[2] 李英秋[2] 

机构地区：[1]北京大学化学与分子工程学院,放射化学与辐射化学重点学科实验室,北京分子科学国家实验室,北京100871 [2]中国工程物理研究院,绵阳621900

出　　处：《北京大学学报（自然科学版）》2016年第6期1050-1056,共7页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家自然科学基金(91226112,20871009)资助

摘　　要：针对含微量铀的有机废液中铀难以回收的难题,选择Na2CO3水溶液对有机相中的铀进行反萃,得到碱性含铀水溶液,并应用偕胺肟基吸附材料进行富集。考察了碳酸盐对有机相中铀的反萃过程中反萃动力学、碳酸钠浓度以及相比的影响,探究吸附过程中振荡速率、吸附材料使用量、溶液中CO32?浓度等参数的影响,研究了偕胺肟基吸附材料的重复利用性。在此基础上,提出了从有机废液中高效富集与回收微量铀的流程。Considering the difficulty to recover trace uranium in organic phase, Na2CO3 aqueous solution was used to strip uranium, then the amidoxime adsorbents were chosen to enrich uranyl in the aqueous phase. In the stripping part, the kinetics of stripping, the effects of the concentration of Na2CO3 and phase ratio on the stripping efficiency were investigated. Then, in the adsorption part, the effects of shaking rate, the mass of adsorbents and the concentration of Na2CO3 were studied. After the validation of the recyclable performance of the amidoxime adsorbents, a process for recovering trace uranium in organic waste liquid was proposed.

关 键 词：偕胺肟 三碳酸铀酰铵 吸附 有机废液 反萃 

分 类 号：X771[环境科学与工程—环境工程]