偕胺肟功能化水热碳微球对铀的吸附性能  

Adsorption of U(Ⅵ)in Aqueous Solution by Amidoxime-Functionalized Hydrothermal Carbon Spheres

作　　者：何丽凯 王琳[1] 张志宾[1] 刘云海[1] 

机构地区：[1]东华理工大学核资源与环境省部共建国家重点实验室培育基地,江西南昌330013

出　　处：《核化学与放射化学》2016年第2期116-122,共7页Journal of Nuclear and Radiochemistry

基　　金：国家自然科学基金资助项目(11475044;41461070);江西省科技支撑计划资助项目(20141BBG70001);江西省青年科学家培养对象计划资助项目(20122BCB23023);江西省优势科技创新团队计划资助项目(20142BCB24006)

摘　　要：为在碳微球表面引入偕胺肟基团,采用丙烯腈接枝淀粉为原料,通过水热法成功制备偕胺肟功能化水热碳微球(HTC-AO),并研究了HTC-AO对水溶液中铀的吸附性能,HTC-AO对铀吸附的最佳pH=6.0,吸附量最大为455.6mg/g,吸附过程符合Langmuir等温方程和准二级动力学方程。热力学研究表明,吸附过程为自发吸热过程。选择性研究结果表明,在多种离子共存的情况下HTC-AO对铀具有很高的选择性。In order to graft amidoxime onto the surface of carbon spheres,amidoxime-rich carbon spheres（HTC-AO）has been synthesized via hydrothermal carbonization of acrylonitrile grafted starch,which was used for the removal of U（Ⅵ）from aqueous solution.The pH of initial aqueous solution at 6.0is in favour of adsorption of uranium.The adsorption capacity of HTC-AO is 455.6 mg/g.In addition,the adsorption of uranium ions could be well-described by the Langmuir isotherms and pseudo-second kinetic models.And thermodynamic parameters indicate the adsorption process is feasible,endothermic and spontaneous.Selective adsorption studies show that the HTC-AO has a high selective for U（Ⅵ）in the presence of co-existing ions.

关 键 词：水热碳微球 偕胺肟 吸附 铀 

分 类 号：O636.11[理学—高分子化学] O614.62[理学—化学]