摘要
以高锰酸钾/浓硫酸氧化法轴向切割多壁碳纳米管(MWCNTs)所制备的氧化石墨烯纳米带(GONRs)为原料,采用水热法制备了一种便于固液分离的功能性四氧化三铁/GONRs复合材料(MGONRs),对其进行了SEM、FT-IR、XRD等表征,并考察了其对U(Ⅵ)的吸附性能。探讨了溶液pH值、MGONRs用量、铀初始浓度、吸附时间和温度对MGONRs吸附U(Ⅵ)的影响。结果表明:MGONRs对U(Ⅵ)的吸附过程是与pH值和时间相关的自发的吸热过程;吸附符合准二级动力学模型和Langmuir模型,MGONRs对U(Ⅵ)的吸附量可达123.2mg/g,且具有良好的再生性能,有望用于从放射性废水中分离和回收铀。
A functional ferroferric oxide/graphene oxide nanoribbons(MGONRs)composite material was synthesized by hrdrothermal method using graphene oxide nanoribbons(GONRs)as raw material which was formed by longitudinal unzipping multi-walled carbon nanotubes(MWCNTs)with KMnO 4 and H 2SO 4.The structure,morphology and property of as-prepared MGONRs were characterized by SEM,FT-IR and XRD,and adsorption behaviors of U(Ⅵ)on as-prepared adsorbents were investigated by varying pH,adsorbent dosage,contact time,initial uranium concentration and temperature.The results show that U(Ⅵ)adsorption on MGONRs was pH-dependent,endothermic,spontaneous and a pseudo-second order process.Higher temperature is beneficial to the U(Ⅵ)adsorption.The adsorption process obeys Langmuir isotherm model,and has the maximum adsorption capacity of 123.2 mg/g and good regeneration performance.MGONRs could have practical application in separation and recovery of uranium from radio-wastewater.
作者
吴鹏
王云
胡学文
袁定重
仝小兰
谢鹏
刘峙嵘
WU Peng;WANG Yun;HU Xuewen;YUAN Dingzhong;TONG Xiaolan;XIE Peng;LIU Zhirong(State Key Laboratory Breeding Base of Nuclear Resources and Environment, East China University of Technology,Nanchang 330013,China;Nuclear Technology Application Ministry of Education Engineering Research Center, East China University of Technology,Nanchang 330013,China;School of Nuclear Science and Engineering,East China University of Technology,Nanchang 330013,China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2018年第9期1561-1568,共8页
Atomic Energy Science and Technology
基金
国家自然科学基金资助项目(21601033
21661003
21461001
11375043)
江西省主要科学和技术带头人资助计划资助项目(20172BCB22020)
东华理工大学核资源与环境教育部重点实验室开放基金资助项目(NRE1509)
东华理工大学核技术应用教育部工程研究中心开放基金资助项目(HJSJYB2016-6)
江西省教育厅科技计划资助项目(GJJ150571)
关键词
氧化石墨烯纳米带
磁性复合材料
铀
吸附
graphene oxide nanoribbon
magnetic composite material
uranium
adsorption
