Adsorption of Aqueous Mercury(II) Species by Commercial Activated Carbon Fibres with and without Surface Modification
The adsorption of HgCl 2 , [HgCl 4 ] 2– and Hg 2+ onto a series of activated carbon fibres was studied. These included the as-received commercial activated carbon fibre (K), that obtained after modification via by sulphuric acid oxidation (K AC ) and that obtained after modification by reaction with...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2007-04-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361707782398236 |
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| author | João M. Valente Nabais Peter J.M. Carrott Manuela Ribeiro Carrott Sara Silvestre Carlos J. Durán-Valle |
| author_facet | João M. Valente Nabais Peter J.M. Carrott Manuela Ribeiro Carrott Sara Silvestre Carlos J. Durán-Valle |
| author_sort | João M. Valente Nabais |
| collection | DOAJ |
| description | The adsorption of HgCl 2 , [HgCl 4 ] 2– and Hg 2+ onto a series of activated carbon fibres was studied. These included the as-received commercial activated carbon fibre (K), that obtained after modification via by sulphuric acid oxidation (K AC ) and that obtained after modification by reaction with pentaethylenehexamine (K BAS ). The effects of concentration (10–1500 mg/l), solution pH (1–10) and temperature (25°C, 35°C and 45°C) were studied. The mercury(II) adsorption isotherms followed the Langmuir model with maximum adsorption capacities of 361.0, 142.2 and 300.3 mg/g for HgCl 2 , [HgCl 4 ] 2– and Hg 2+ , respectively. Fibre K proved to have the highest adsorption capacity towards HgCl 2 but the best results for the adsorption of [HgCl 4 ] 2– and Hg 2+ were obtained with the fibre K AC . The performance of fibre K BAS was always worse than those of the other two fibres tested. The negative values obtained for ΔH 0 and ΔG 0 indicate that the adsorption was an exothermic and spontaneous process and also demonstrated that the adsorption of Hg(II) is a feasible process. |
| format | Article |
| id | doaj-art-544bbe4d1d0e48d182bb6b57564c4fb5 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2007-04-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-544bbe4d1d0e48d182bb6b57564c4fb52025-01-02T02:58:13ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382007-04-012510.1260/026361707782398236Adsorption of Aqueous Mercury(II) Species by Commercial Activated Carbon Fibres with and without Surface ModificationJoão M. Valente Nabais0Peter J.M. Carrott1Manuela Ribeiro Carrott2Sara Silvestre3Carlos J. Durán-Valle4 Centro de Química de Évora e Departamento de Química da Universidade de Évora, Rua Romão Ramalho n° 59, 7000-671 Évora, Portugal Centro de Química de Évora e Departamento de Química da Universidade de Évora, Rua Romão Ramalho n° 59, 7000-671 Évora, Portugal Centro de Química de Évora e Departamento de Química da Universidade de Évora, Rua Romão Ramalho n° 59, 7000-671 Évora, Portugal Centro de Química de Évora e Departamento de Química da Universidade de Évora, Rua Romão Ramalho n° 59, 7000-671 Évora, Portugal Departamento de Química Inorgánica, Universidad de Extremadura, Avda. de Elvas, s/n 06071 Badajoz, SpainThe adsorption of HgCl 2 , [HgCl 4 ] 2– and Hg 2+ onto a series of activated carbon fibres was studied. These included the as-received commercial activated carbon fibre (K), that obtained after modification via by sulphuric acid oxidation (K AC ) and that obtained after modification by reaction with pentaethylenehexamine (K BAS ). The effects of concentration (10–1500 mg/l), solution pH (1–10) and temperature (25°C, 35°C and 45°C) were studied. The mercury(II) adsorption isotherms followed the Langmuir model with maximum adsorption capacities of 361.0, 142.2 and 300.3 mg/g for HgCl 2 , [HgCl 4 ] 2– and Hg 2+ , respectively. Fibre K proved to have the highest adsorption capacity towards HgCl 2 but the best results for the adsorption of [HgCl 4 ] 2– and Hg 2+ were obtained with the fibre K AC . The performance of fibre K BAS was always worse than those of the other two fibres tested. The negative values obtained for ΔH 0 and ΔG 0 indicate that the adsorption was an exothermic and spontaneous process and also demonstrated that the adsorption of Hg(II) is a feasible process.https://doi.org/10.1260/026361707782398236 |
| spellingShingle | João M. Valente Nabais Peter J.M. Carrott Manuela Ribeiro Carrott Sara Silvestre Carlos J. Durán-Valle Adsorption of Aqueous Mercury(II) Species by Commercial Activated Carbon Fibres with and without Surface Modification Adsorption Science & Technology |
| title | Adsorption of Aqueous Mercury(II) Species by Commercial Activated Carbon Fibres with and without Surface Modification |
| title_full | Adsorption of Aqueous Mercury(II) Species by Commercial Activated Carbon Fibres with and without Surface Modification |
| title_fullStr | Adsorption of Aqueous Mercury(II) Species by Commercial Activated Carbon Fibres with and without Surface Modification |
| title_full_unstemmed | Adsorption of Aqueous Mercury(II) Species by Commercial Activated Carbon Fibres with and without Surface Modification |
| title_short | Adsorption of Aqueous Mercury(II) Species by Commercial Activated Carbon Fibres with and without Surface Modification |
| title_sort | adsorption of aqueous mercury ii species by commercial activated carbon fibres with and without surface modification |
| url | https://doi.org/10.1260/026361707782398236 |
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