Removal of Cu Ions from Aqueous Solutions by Carbon Nanotubes
Carbon nanotubes (CNTs), a new crystalline form in the carbon family, have been shown to be an effective adsorbent for Cu 2+ ion removal from aqueous solution. After oxidation with nitric acid, the adsorption capacity of the oxidized CNTs towards Cu 2+ ions at a pH of 5.2 reached 27.6 mg/g, compared...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publications
2003-06-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361703769645807 |
| _version_ | 1797288903872348160 |
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| author | Yan-Hui Li Zhaokun Luan Xu Xiao Xiangwen Zhou Cailu Xu Dehai Wu Bingqing Wei |
| author_facet | Yan-Hui Li Zhaokun Luan Xu Xiao Xiangwen Zhou Cailu Xu Dehai Wu Bingqing Wei |
| author_sort | Yan-Hui Li |
| collection | DOAJ |
| description | Carbon nanotubes (CNTs), a new crystalline form in the carbon family, have been shown to be an effective adsorbent for Cu 2+ ion removal from aqueous solution. After oxidation with nitric acid, the adsorption capacity of the oxidized CNTs towards Cu 2+ ions at a pH of 5.2 reached 27.6 mg/g, compared to a value of only 14.4 mg/g for the as-grown CNTs under the same circumstances. Increasing the pH to 5.4 led to 95% removal of Cu 2+ ions with the oxidized CNTs, whereas with the as-grown CNTs it was necessary to increase the pH to 8.6 to achieve the same extent of removal. The Cu 2+ ion adsorption capacity increased with increasing CNT dosage for the different initial Cu 2+ ion concentrations. The kinetic curve for adsorption of the Cu 2+ ions suggested that not only the outer surfaces but also inner cavities and inter-layers in the structures of the CNTs were responsible for the removal of the ion from aqueous solutions. |
| first_indexed | 2024-03-07T18:56:25Z |
| format | Article |
| id | doaj.art-63bb78ee0f924972ab14607705f3830c |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2024-03-07T18:56:25Z |
| publishDate | 2003-06-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-63bb78ee0f924972ab14607705f3830c2024-03-02T00:20:15ZengSAGE PublicationsAdsorption Science & Technology0263-61742048-40382003-06-012110.1260/026361703769645807Removal of Cu Ions from Aqueous Solutions by Carbon NanotubesYan-Hui Li0Zhaokun Luan1Xu Xiao2Xiangwen Zhou3Cailu Xu4Dehai Wu5Bingqing Wei6 Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China State Key Laboratory of Environmental Aquatic Chemistry, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China Department of Materials Science & Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USACarbon nanotubes (CNTs), a new crystalline form in the carbon family, have been shown to be an effective adsorbent for Cu 2+ ion removal from aqueous solution. After oxidation with nitric acid, the adsorption capacity of the oxidized CNTs towards Cu 2+ ions at a pH of 5.2 reached 27.6 mg/g, compared to a value of only 14.4 mg/g for the as-grown CNTs under the same circumstances. Increasing the pH to 5.4 led to 95% removal of Cu 2+ ions with the oxidized CNTs, whereas with the as-grown CNTs it was necessary to increase the pH to 8.6 to achieve the same extent of removal. The Cu 2+ ion adsorption capacity increased with increasing CNT dosage for the different initial Cu 2+ ion concentrations. The kinetic curve for adsorption of the Cu 2+ ions suggested that not only the outer surfaces but also inner cavities and inter-layers in the structures of the CNTs were responsible for the removal of the ion from aqueous solutions.https://doi.org/10.1260/026361703769645807 |
| spellingShingle | Yan-Hui Li Zhaokun Luan Xu Xiao Xiangwen Zhou Cailu Xu Dehai Wu Bingqing Wei Removal of Cu Ions from Aqueous Solutions by Carbon Nanotubes Adsorption Science & Technology |
| title | Removal of Cu Ions from Aqueous Solutions by Carbon Nanotubes |
| title_full | Removal of Cu Ions from Aqueous Solutions by Carbon Nanotubes |
| title_fullStr | Removal of Cu Ions from Aqueous Solutions by Carbon Nanotubes |
| title_full_unstemmed | Removal of Cu Ions from Aqueous Solutions by Carbon Nanotubes |
| title_short | Removal of Cu Ions from Aqueous Solutions by Carbon Nanotubes |
| title_sort | removal of cu ions from aqueous solutions by carbon nanotubes |
| url | https://doi.org/10.1260/026361703769645807 |
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