Adsorption of thorium(IV) on magnetic multi-walled carbon nanotubes

查看全文 作　　者：LIU [1]Peng;QI [1]Wei;DU [1]YaoFang;LI [2]Zhan;WANG [1]Jing;BI [1]JuanJuan;WU [1,3]WangSuo

机构地区：[1]Radiochemistry Laboratory, Lanzhou University;[2]Institute of Modern Physics, Chinese Academy of Sciences;[3]State Key Laboratory of Applied Organic Chemistry, Lanzhou University

出　　处：《Science China Chemistry》索引2014年第57卷第11期,共8页

基　　金：supported by the National Natural Science Foundation of China(J1210001) 摘　　要：The influences of pH, contact time, solid-liquid ratio, temperature and C60(C(COOH)2)n on Th(IV) adsorption onto the magnetic multi-walled carbon nanotubes(MMWCNTs) were studied by batch technique. The dynamic process showed that the adsorption of Th(IV) onto MMWCNTs could reach equilibrium in 40 h and matched the pseudo-second-order kinetics model. The adsorption of Th(IV) onto MMWCNTs was significantly dependent on pH values, the adsorption ratio increased markedly at pH 3.0–5.0, and then maintained a steady state as pH values increased. At low pH, different C60(C(COOH)2)n content could enhance the adsorption content of Th(IV) onto MMWCNTs, but restrained it at higher pH. Through simulating the adsorption isotherms by Langmuir, Freundlich and Dubini-Radushkevich models, it could be seen respectively that the adsorption pattern of Th(IV) onto MMWCNTs was mainly surface complexation, and that the adsorption process was endothermic and irreversible. 关键词：多壁碳纳米管钍(Ⅳ) 吸附率磁性 LANGMUIR 钍(IV) COOH pH值

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Adsorption of thorium(IV) on magnetic multi-walled carbon nanotubes

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