| Adsorption behavior of heavy metal ions by carbon nanotubes grown on microsized Al2O3 particles |
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| 作者姓名： | Shu-Huei Hsieh Jao-Jia Horng |
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| 作者单位： | [1]Department of Materials Science and Engineering, Formosa University, Yunlin, China Taipei [2]Department of Safety, Health and Environmental Engineering, Yunlin University of Science and Technology, Yunlin, China Taipei |
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| 摘 要： | Carbon nanotubes （CNTs） were grown on the surface of microsized Al2O3 particles in CH4 atmosphere at 700℃ under the catalysis of Fe-Ni nanoparticles. The CNTs on Al2O3 were used for adsorbing Pb^2＋, Cu^2＋, and Cd^2＋ from the solution and the results were compared with active carbon powders, commercial carbon nanotubes, and Al2O3 particles. The as-grown CNTs/Al2O3 have demonstrated extraordinary absorption capacity with further treatment or oxidation, as well as hydrophilic ability that other CNTs lacked. The adsorption capacity of CNTs on Al2O3 is superior to other adsorbents and the preference order of adsorption on composite Al2O3 is pb^2＋〉Cu^2＋〉Cd^2＋. It seemed that the adsorption of those Pb^2＋, Cu^2＋, and Cd^2＋ did not change the surface properties of composite particles. The adsorption behaviors of Pb^2＋, Cu^2＋, and Cd^2＋ by CNTs on Al2O3 match well with the Langmuir isothermal adsorption model and the second order kinetic model. The calculated saturation amount adsorbed by 1 g of CNTs on Al2O3 are 67.11, 26.59, and 8.89 mg/g for Pb^2＋, Cu^2＋, and Cd^2＋ in single adsorption test, respectively.
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| 关 键 词： | Al2O3微粒 碳纳米管 重金属离子 吸附作用 水处理 |
| 收稿时间： | 2006-03-05 |
Adsorption behavior of heavy metal ions by carbon nanotubes grown on microsized Al2O3 particles |
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| Shu-Huei Hsieh Jao-Jia Horng.Adsorption behavior of heavy metal ions by carbon nanotubes grown on microsized Al2O3 particles[J].Journal of University of Science and Technology Beijing,2007,14(1):77-84. |
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| Authors: | Shu-Huei Hsieh Jao-Jia Horng |
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| Affiliation: | 1. Department of Materials Science and Engineering, Formosa University, Yunlin, China Taipei;2. Department of Safety, Health and Environmental Engineering, Yunlin University of Science and Technology, Yunlin, China Taipei;1. College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China;2. Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, PR China;1. Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China;2. Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, China;3. School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;4. Shandong Provincial Analysis and Test Center, Jinan 250100, China |
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| Abstract: | Carbon nanotubes (CNTs) were grown on the surface of microsized Al2O3 particles in CH4 atmosphere at 700 ℃ under the catalysis of Fe-Ni nanoparticles.The CNTs on Al2O3 were used for adsorbing Pb2 ,Cu2 ,and Cd2 from the solution and the results were compared with active carbon powders,commercial carbon nanotubes,and Al2O3 particles.The as-grown CNTs/Al2O3 have demonstrated extraordinary absorption capacity with further treatment or oxidation,as well as hydrophilic ability that other CNTs lacked.The adsorption capacity of CNTs on Al2O3 is superior to other adsorbents and the preference order of adsorption on composite Al2O3 is Pb2 ＞Cu2 ＞Cd2 .It seemed that the adsorption of those Pb2 ,Cu2 ,and Cd2 did not change the surface properties of composite particles.The adsorption behaviors of Pb2 ,Cu2 ,and Cd2 by CNTs on Al2O3 match well with the Langmuir isothermal adsorption model and the second order kinetic model.The calculated saturation amount adsorbed by 1 g of CNTs on Al2O3 are 67.11,26.59,and 8.89 mg/g for Pb2 ,Cu2 ,and Cd2 in single adsorption test,respectively. |
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| Keywords: | carbon nanotube heavy metal adsorption alumina |
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