PO-Cu-BDC材料的合成及其对铀的吸附性能研究  

Study on Synthesis of PO-Cu-BDC and Its Adsorption Properties for Uranium

作　　者：肖静水[1] 刘敏[1] 彭安国[1] XIAO Jing-shui;LIU Min;PENG An-guo(School of Nuclear Science and Technology,University of South China,Hunan Hengyang 421001,China)

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001

出　　处：《广州化工》2020年第5期52-54,共3页GuangZhou Chemical Industry

基　　金：湖南省教育基金项目(No:12C0335)。

摘　　要：以N,N-二甲基甲酰胺、对苯二甲酸和四丁基溴化铵为原料采用电化学法合成Cu-BDC金属有机骨架材料,对其进行氧磷基修饰,得到PO-Cu-BDC材料,将其用于对含铀废水的吸附研究。结果表明:该材料在吸附底液的p H处于5. 0~7. 0间,吸附时间50 min以上时对UO2^2+的吸附率在90%以上;吸附铀饱和后的材料用1. 5 mol/L Na NO3洗脱时,洗脱体积4倍以上,洗脱时间30 min以上时对UO2^2+的洗脱率达95%以上;材料重复吸附三次后对UO2^2+吸附率降为原来的66. 8%,该材料具有一定稳定性,可作吸附剂重复利用。Cu-BDC metal organic framework material was synthesized by electrochemical method with N,N-dimethylformamide,terephthalic acid and tetrabutylammonium bromide. It was modified by dibutylphosphine oxide to obtain PO-Cu-BDC material,which was used to study the adsorption of uranium containing wastewater. The results showed that the adsorption rate of UO2^2+by PO-Cu-BDC material was more than 90% when the p H value was between5. 0 ~ 7. 0 and the adsorption time was more than 50 min. The elution rate of UO2^2+was more than 95% when elution volume was more than 4 times and elution time was more than 30 min when 1. 5 mol/L NaNO3 was used as eluent for POCu-BDC material saturated with uranium. The adsorption rate of UO2^2+decreased to 66. 8% after three times of repeated adsorption. The material had certain stability and can be reused as an adsorbent.

关 键 词：电化学合成 氧磷基 修饰 PO-Cu-BDC金属有机骨架材料 吸附剂 UO2^2+ 

分 类 号：O615.2[理学—无机化学]