硅球/亚铁氰化铜钾复合物固定床选择性去除污染水体中的Cs^(+)及其影响因素  

Selective Removal of Cs^(+)From Contaminated Water Using Silicon Bead/Potassium Copper Ferrocyanide Composites in Fixed-Bed

作　　者：唐潇逸 张致慧[3] 孙健 王百荣 李子杰[2] 王宏青[1] 石伟群[2] TANG Xiao-yi;ZHANG Zhi-hui;SUN Jian;WANG Bai-rong;LI Zi-jie;WANG Hong-qing;SHI Wei-qun(School of Chemistry and Chemical Engineering,University of South China,Hengyang 421001,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology,Advanced Catalysis and Green Manufacturing Collaborative Innovation Center,Changzhou University,Changzhou 213164,China;Institute of NBC Defence,Beijing 102205,China)

机构地区：[1]南华大学化学化工学院,湖南衡阳421001 [2]中国科学院高能物理研究所,北京100049 [3]常州大学先进催化材料与技术江苏省重点实验室,先进催化与绿色制造协同创新中心,江苏常州213164 [4]陆军防化学院,北京102205

出　　处：《核化学与放射化学》2023年第3期240-249,I0003,共11页Journal of Nuclear and Radiochemistry

基　　金：国家自然科学基金面上项目(11575213)。

摘　　要：采用柱上淋洗方式,在硅球(SiO_(2))填料上原位负载亚铁氰化铜钾(Cu-PBA),制得SiO_(2)/Cu-PBA复合材料固定床吸附柱。采用扫描电镜-能谱(SEM-EDS)、红外光谱(FTIR)、粉末X射线衍射(XRD)和N_(2)吸附等温测试等手段对材料进行表征,证实了Cu-PBA的成功负载。通过批式法吸附实验,明确了SiO_(2)/Cu-PBA在模拟地下水中对Cs^(+)的最大吸附容量约为4.0 mg/g,30 min内达吸附平衡。进而系统研究了该材料在固定床系统中对Cs^(+)的吸附行为,包括柱床高、柱内径、进水流速和进水Cs^(+)浓度的影响。在最优固定床实验条件下,对比了SiO^(2)/Cu-PBA和阳离子交换树脂、在模拟地下水及模拟海水中保留Cs^(+)及其他共存碱金属及碱土金属离子(K^(+)、Na^(+)、Ca^(2+)和Mg^(2+))性能,结果表明,SiO_(2)/Cu-PBA拥有优异的Cs^(+)选择性和吸附性能,而树脂柱则在高盐分条件下失效。综上所述,SiO_(2)/Cu-PBA复合物在环境污染水体中选择性去除Cs^(+)方面具有很好的应用前景。By using a column elution method,potassium copper ferrocyanide(Cu-PBA)was in situ loaded on silicon bead(SiO_(2))column packing,thereby yielding a SiO_(2)/Cu-PBA fixed bed column.The characterizations of SiO_(2)/Cu-PBA by SEM-EDS,FTIR,XRD and N_(2) adsorption-desorption isotherm techniques confirms the successful loading of Cu-PBA on SiO_(2).In batch experiments,it is found that the maximum adsorption capacity of SiO_(2)/Cu-PBA for Cs^(+)is around 4.0 mg/g,and it needs 30 min to reach equilibrium adsorption.Then,the adsorpion behavior of Cs^(+)by the SiO_(2)/Cu-PBA fixed bed was systematically studied,including the impacts of various operating parameters such as bed depth,bed diameter,flow rate,and influent Cs+concentration.In the optimized fixed bed system,the adsorption behaviors of Cs+and coexisting metal ions(K^(+),Na^(+),Ca^(2+),and Mg^(2+))by SiO_(2)/Cu-PBA and cation-exchanged resin were compared in both simulated groundwater and seawater.The efficient and highly selective removal of Cs^(+)by SiO_(2)/Cu-PBA is addressed as well as the inefficiency of cation-exchanged resin in simulated seawater.Therefore,the SiO_(2)/Cu-PBA composite will have great application prospects in the continuous removal of Cs^(+)from various Cs^(+)-contaminated environmental water media.

关 键 词：亚铁氰化铜钾 Cs^(+) 动态吸附 模拟地下水 模拟海水 

分 类 号：TL941.13[核科学技术—辐射防护及环境保护]