摘要
目的制备酰胺功能化石墨烯纳米带(GONRs-AM)并研究其对铀的吸附性能。方法对所制得的GONRs-AM进行扫描电镜(SEM)和傅里叶红外光谱(FT-IR)表征,并通过批处理吸附实验考察了溶液pH、吸附剂用量、吸附时间、铀初始浓度、温度和离子强度等因素对GONRs-AM吸附铀的影响。结果GONRs-AM对铀的最大吸附容量为294.5 mg/g,该吸附过程是受pH影响的,自发的放热过程,并符合准二级动力学模型和Langmuir模型。结论GONRs-AM对铀的吸附性能较好,可用于放射性废水中吸附分离铀。
Objective To synthesize amide functionalized graphene oxide nanoribbons(GONRsAM)and investigate their adsorption performance for uranium.Methods Characterization of the synthesized GONRs-AM was made by using scanning electron microscopy(SEM)and Fourier infrared spectroscopy(FT-IR).The effects of solution pH,adsorbent dosage,adsorption time,initial uranium concentration,temperature and ionic strength on the uranium adsorption on GONRs-AM were investigated by using batch adsorption experiments.Results The maximum adsorption capacity of GONRs-AM for uranium was 294.5 mg/g,and the adsorption process was a spontaneous exothermic process influenced by pH,which was consistent with the quasi-second-order kinetic model and the Langmuir model.Conclusions As an adsorbent,GONRs-AM can effectively adsorb uranium from aqueous solution and can be used to separate uranium from radioactive wastewater.
作者
吴振宇
王仲文
王云
Wu Zhenyu;Wang Zhongwen;Wang Yun(China Institute of Atomic Energy,Beijing 102413,China;School of Nuclear Science and Engineering,East China University of Technology,Nanchang 330013,China;Institute of Occupational Medicine of Jiangxi,Nanchang 330006,China)
出处
《中华放射医学与防护杂志》
CAS
CSCD
北大核心
2020年第4期308-314,共7页
Chinese Journal of Radiological Medicine and Protection
基金
江西省卫健委科技计划项目(20203878)。
关键词
氧化石墨烯纳米带
酰胺
铀
吸附
Graphene oxide nanoribbons
Amide group
Uranium
Adsorption
