Removal of heavy metals from aqueous solution by carbon nanotubes: adsorption equilibrium and kinetics

查看全文 作　　者：LIYan-[1]hui;DIZe-[1]chao;LUANZhao-[1]kun;[2]DINGJun;[1]ZUOHua;WUXiao-[1]qing;XUCai-[2]Lu

机构地区：[1]StateKeyLaboratoryofEnvironmentalAquaticChemistry,ResearchCenterforEeo-EnvironmentalSciences,ChineseAcademyofSciences,Beijing100085,China;[2]DepartmentofMechanicalEngineering,TsinghuaUniversity,Beijing100084,China.

出　　处：《Journal of Environmental Sciences》索引2004年第16卷第2期,共4页

基　　金：TheFundamentalResearchofMOSTofChina(No .2 0 0 0 0 2 64 0 4 );theOpenFundsofStateKeyLaboratoryofEnvironmentalAquaticChemistry 摘　　要：Carbon nanotubes prepared by catalytic chemical vapor deposition of hydrocarbon at 650℃ show good adsorption capability of Pb 2+ , Cu 2+ and Cd 2+ ions from aqueous solution after oxidized with concentrated nitric acid at 140℃ for 1 h. The specific surface area and particle size distribution of the as-grown and oxidized CNTs were studied by BET method and laser particle analyzer. Three kinetic models, that is, first-, pseudo second- and second-order, were used to investigate the adsorption data and the pseudo second-order model can represent the experimental data better than two others. The equilibrium data fitted well with the Langmuir model and showed the following adsorption order: Pb 2+ >Cu 2+ >Cd 2+ . 关键词：吸附平衡重金属动力学水溶液

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Removal of heavy metals from aqueous solution by carbon nanotubes: adsorption equilibrium and kinetics

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