Characterisation of Surface Ionisation and Adsorption of Phenol and 4-Nitrophenol on Non-Porous Carbon Blacks
The adsorption of phenol and 4-nitrophenol from aqueous solutions by carbon blacks was studied. Particular attention was paid to the characterisation of the surface chemistry and ionisation of the carbon blacks by use of a simple carbon surface ionisation model, as well as the use of a normalised fo...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publications
2008-12-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361708788708252 |
| _version_ | 1797284015529525248 |
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| author | P.J.M. Carrott M.M.L. Ribeiro Carrott T.S.C. Vale L. Marques J.M. Valente Nabais P.A.M. Mourão P.A.M. Suhas |
| author_facet | P.J.M. Carrott M.M.L. Ribeiro Carrott T.S.C. Vale L. Marques J.M. Valente Nabais P.A.M. Mourão P.A.M. Suhas |
| author_sort | P.J.M. Carrott |
| collection | DOAJ |
| description | The adsorption of phenol and 4-nitrophenol from aqueous solutions by carbon blacks was studied. Particular attention was paid to the characterisation of the surface chemistry and ionisation of the carbon blacks by use of a simple carbon surface ionisation model, as well as the use of a normalised form of the Freundlich equation for the analysis of the adsorption isotherms. The results indicated that the solutes interact directly with the graphene layers and that the adsorption is sensitive to the π-electron density. Phenol has a weaker interaction and is more sensitive to the system conditions. In particular, it is more sensitive to oligomerisation under certain conditions. Comparison of the results with those previously reported for activated carbons with similar points of zero charge prepared from cork confirms the existence of a significant micropore-narrowing effect in the adsorption of organic solutes by activated carbons and which can lead to up to a doubling of the value of the Freundlich exponent, n F . |
| first_indexed | 2024-03-07T17:42:51Z |
| format | Article |
| id | doaj.art-5dd25c5a32204e058b9bc148d3024ae9 |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2024-03-07T17:42:51Z |
| publishDate | 2008-12-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-5dd25c5a32204e058b9bc148d3024ae92024-03-02T15:53:59ZengSAGE PublicationsAdsorption Science & Technology0263-61742048-40382008-12-012610.1260/026361708788708252Characterisation of Surface Ionisation and Adsorption of Phenol and 4-Nitrophenol on Non-Porous Carbon BlacksP.J.M. CarrottM.M.L. Ribeiro CarrottT.S.C. ValeL. MarquesJ.M. Valente NabaisP.A.M. MourãoP.A.M. SuhasThe adsorption of phenol and 4-nitrophenol from aqueous solutions by carbon blacks was studied. Particular attention was paid to the characterisation of the surface chemistry and ionisation of the carbon blacks by use of a simple carbon surface ionisation model, as well as the use of a normalised form of the Freundlich equation for the analysis of the adsorption isotherms. The results indicated that the solutes interact directly with the graphene layers and that the adsorption is sensitive to the π-electron density. Phenol has a weaker interaction and is more sensitive to the system conditions. In particular, it is more sensitive to oligomerisation under certain conditions. Comparison of the results with those previously reported for activated carbons with similar points of zero charge prepared from cork confirms the existence of a significant micropore-narrowing effect in the adsorption of organic solutes by activated carbons and which can lead to up to a doubling of the value of the Freundlich exponent, n F .https://doi.org/10.1260/026361708788708252 |
| spellingShingle | P.J.M. Carrott M.M.L. Ribeiro Carrott T.S.C. Vale L. Marques J.M. Valente Nabais P.A.M. Mourão P.A.M. Suhas Characterisation of Surface Ionisation and Adsorption of Phenol and 4-Nitrophenol on Non-Porous Carbon Blacks Adsorption Science & Technology |
| title | Characterisation of Surface Ionisation and Adsorption of Phenol and 4-Nitrophenol on Non-Porous Carbon Blacks |
| title_full | Characterisation of Surface Ionisation and Adsorption of Phenol and 4-Nitrophenol on Non-Porous Carbon Blacks |
| title_fullStr | Characterisation of Surface Ionisation and Adsorption of Phenol and 4-Nitrophenol on Non-Porous Carbon Blacks |
| title_full_unstemmed | Characterisation of Surface Ionisation and Adsorption of Phenol and 4-Nitrophenol on Non-Porous Carbon Blacks |
| title_short | Characterisation of Surface Ionisation and Adsorption of Phenol and 4-Nitrophenol on Non-Porous Carbon Blacks |
| title_sort | characterisation of surface ionisation and adsorption of phenol and 4 nitrophenol on non porous carbon blacks |
| url | https://doi.org/10.1260/026361708788708252 |
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