摘要
通过氧化石墨和氨基三亚甲基膦酸反应制得一种石墨烯海绵材料ATMP-GS,将制备的材料进行对铀的吸附实验,考察了溶液pH、温度、ATMP-GS用量、吸附时间和铀溶液初始浓度对吸附效果的影响。实验结果发现,在pH为5.0时ATMP-GS吸附铀的效果最好,吸附在3 h内即可达到平衡,最大吸附容量为96 mg/g,温度对其吸附铀的能力影响不大。ATMP-GS吸附铀的动力学过程符合准二级动力学模型,Langmuir和Freundlich吸附等温模型均可较好地用来描述ATMP-GS对铀的吸附。对该材料进行了SEM、XRD表征,结果表明该材料有较多地孔径分布,这将有利于铀的吸附进行。
A graphene spongy material ATMP-GS was synthesized by the reaction of graphene oxide with Amino Trimethylene Phosphonic Acid,then this material was used for the adsorption of uranium ion,and the effects of pH,temperature,the mass of ATMP-GS,adsorption time also initial concentration of uranium ion on adsorption were investigated.The results indicated that,ATMP-GS has the best adsorption performance for uranium ion at pH 5.0,and the adsorption can be completed within 3 hours,the largest adsorption capacity for U was found to be 96mg/g,temperature have little effect on the adsorption.The adsorption system belongs to the second-order kinetic model and the adsorption isotherms can be described well by the Freundlich model as well as by the Langrnuir model.The material was then characterized by SEM 、XRD,the results shows the material has many pore size distributions,which will favor the adsorption of uranium.
出处
《东华理工大学学报（自然科学版）》
CAS
2014年第2期230-235,共6页
Journal of East China University of Technology(Natural Science)
基金
国家自然科学基金(21367001)
东华理工大学放射性地质勘探与技术国防重点学科实验室开放基金(2011RGET013)
关键词
石墨烯
吸附
铀
graphene
adsorption
uranium
