模拟高盐溶液中硫酸钛水解对Sr的去除研究  

Study on Removal of Sr in Solution with High Salt through Hydrolysis Reaction of Titanium Sulfate

作　　者：李玉松 郑宇 郑文俊 王雷[1] 华小辉[1] 游新锋[1] 杨林月 李腾 张振涛[1] LI Yusong;ZHENG Yu;ZHENG Wenjun;WANG Lei;HUA Xiaohui;YOU Xinfeng;YANG Linyue;LI Teng;ZHANG Zhentao(China Institute of Atomic Energy,P.O.Box 275 93,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《原子能科学技术》2018年第12期2201-2206,共6页Atomic Energy Science and Technology

摘　　要：研究了硫酸钛在模拟高盐溶液中的水解反应对Sr^(2+)的吸附能力并对其水解产物进行了分析。首先,通过电感耦合等离子体质谱(ICP-MS)对硫酸钛水解过程中对Sr^(2+)的吸附能力进行了研究;其次,通过扫描电子显微镜(SEM)和X射线衍射(XRD)对硫酸钛水解产物的形貌及结构进行了表征;最后,对该工艺进行了放射性工程热试验验证,验证试验以100L/h的废液处理规模,连续运行105h。研究结果表明,随着溶液pH值的升高,硫酸钛水解对Sr^(2+)的吸附能力逐渐增强。当pH=13时,吸附能力达到最大值,此时对Sr^(2+)的吸附率达99.4%,对Sr^(2+)的吸附量为1.67mmol/g。另外,研究还证明,该吸附过程是短时间内完成的,反应时间对吸附率基本无影响。放射性工程热试验验证了工艺的可行性,试验中90Sr的去污因子(DF)达215。The hydrolysis reaction of titanium sulfate and its adsorption ability for Sr2＋in solution with high salt were studied.Firstly,the adsorption of hydrolyzate for Sr2＋was investigated by ICP-MS.Secondly,the morphology and structure of hydrolyzate were characterized by scanning electron microscopy（SEM）and X-ray diffraction（XRD）.Finally,this technology was applied to the radioactive engineering test,and the test was run continually for 105 hours with 100 L/h of wastewater treatment.The results show that the hydrolyzate displays a significantly enhanced adsorption for Sr2＋,and the adsorption ability strongly depends on the pH value of the solution with high salt.When the pH is 13,the adsorption ability of hydrolyzate for Sr2＋is maximum andit could reach up to 99.4%.The adsorption capacity of titanium sulfate for Sr2＋is1.67 mmol/g.And the effect of reaction time on the adsorption rate was also studied,which proves that the adsorption for Sr2＋is done quickly.The radioactive engineering test verifies the feasibility of the process,the decontamination factor（DF）for 90 Sr could reach up to 215.

关 键 词：硫酸钛水解 高盐溶液 吸附率 去污因子 

分 类 号：TL941[核科学技术—辐射防护及环境保护]