氧化石墨烯纳米带对Th(Ⅳ)的吸附性能研究  

Th(Ⅳ) Sorption on Graphene Oxide Nanoribbons

作　　者：王云[1,2,3] 吴鹏 胡学文 袁定重 仝小兰[1] 谢鹏 刘峙嵘 WANG Yun;WU Peng;HU Xue-wen;YUAN Ding-zhong;TONG Xiao-lan;XIE Peng;LIU Zhi-rong(State Key Laboratory Breeding Base of Nuclear Resources and Environment,East China University of Technology,Nanchang,JX 330013,China;Engineering Research Center of Nuclear Technology Application,Ministry of Education,East China University of Technology,Nanchang,JX 330013,China;School of Nuclear Science and Engineering,East China University of Technology,Nanchang,JX 330013,China)

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 [2]东华理工大学核技术应用教育部工程研究中心,江西南昌330013 [3]东华理工大学核科学与工程学院,江西南昌330013

出　　处：《东华理工大学学报（自然科学版）》2018年第1期71-77,共7页Journal of East China University of Technology(Natural Science)

基　　金：国家自然科学基金项目(21601033,21661003,21461001,11375043);东华理工大学核资源与环境教育部重点实验室开放基金项目(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项目(HJSJYB2016-6);江西省教育厅科技计划项目(GJJ150571)

摘　　要：利用高锰酸钾/浓硫酸氧化法对多壁碳纳米管(MWCNTs)进行了轴向切割,制得含氧基团丰富的氧化石墨烯纳米带(GONRs),利用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射仪(XRD)和傅里叶变换红外光谱(FT-IR)对其表面形貌和结构进行了表征,并研究对钍的吸附性能,探讨了p H、吸附剂用量、接触时间、钍离子浓度和温度等因素对吸附的影响。结果表明,GONRs对Th(Ⅳ)的吸附过程是与p H相关的、快速、自发的吸热过程;吸附符合准二级动力学模型和Langmuir模型,GONRs对Th(Ⅳ)的吸附容量可达314.3 mg/g,GONRs有望用于放射性废水中钍的吸附。Multi-walled carbon nanotubes(MWCNTs)were longitudinal unzipping to form graphene oxide nanoribbons(GONRs)with abundant oxygen-containing groups by KMnO 4 and H 2SO 4.GONRs were characterized by scan electron microscope(SEM),transmission electron microscope(TEM),X-ray diffraction(XRD)and Fourier transformed infrared spectroscopy(FT-IR).Sorption behaviors of Th(IV)on GONRs were investigated by varying pH,sorbent dosage,contact time,initial uranium concentration,and temperature.The results showed that thorium sorption on GONRs was pH-dependent,fast,endothermic,spontaneous and a pseudo-second order process.Higher temperature was beneficial to the Th(IV)sorption.Sorption process obeyed Langmuir isotherm,and the maximum sorption capacity of Th(IV)on GONRs was 314.3 mg/g.GONRs could have pratical application in thorium-containing aqueous media.

关 键 词：石墨烯纳米带 吸附 钍 

分 类 号：O647.3[理学—物理化学]