Nickel(II) Ion Adsorption onto Activated Carbon. Relationship between Physicochemical Properties and Adsorption Capacity
The adsorption of nickel(II) ions from aqueous solution onto various forms of granular activated carbon, GAC, has been studied. Thus, GAC was heat-treated at 900 °C (GAC 900), oxidized with HNO 3 (GACox), and this material subsequently heat-treated in an inert atmosphere at 450 °C and 750 °C (GACox...
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| Format: | Article |
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SAGE Publishing
2011-06-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.29.6.541 |
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| author | Paola Rodríguez-Estupiñán Liliana Giraldo Juan Carlos Moreno-Piraján |
| author_facet | Paola Rodríguez-Estupiñán Liliana Giraldo Juan Carlos Moreno-Piraján |
| author_sort | Paola Rodríguez-Estupiñán |
| collection | DOAJ |
| description | The adsorption of nickel(II) ions from aqueous solution onto various forms of granular activated carbon, GAC, has been studied. Thus, GAC was heat-treated at 900 °C (GAC 900), oxidized with HNO 3 (GACox), and this material subsequently heat-treated in an inert atmosphere at 450 °C and 750 °C (GACox 450 and GACox 750), all with the objective of changing the total acidity of the samples and demonstrating its influence on the adsorption capacity. The solids were characterized by N 2 and CO 2 adsorption isotherms from which the micropore volumes and surface areas were calculated — the latter being between 816 and 935 m 2 /g. In addition, some chemical characteristics such as the pH of the point of zero charge, the total acidity and basicity were examined, while immersion calorimetric studies in water were undertaken. The experimental results showed that the quantity of nickel(II) ions adsorbed onto the various GAC samples followed the order: GACox < GAC < GACox 450 < GACox 750 > GAC 900, indicating that the adsorption capacity depended largely on the surface acidity of the solid samples. |
| format | Article |
| id | doaj-art-fd278f43d16f42a09d2019af8cba89b5 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2011-06-01 |
| publisher | SAGE Publishing |
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| series | Adsorption Science & Technology |
| spelling | doaj-art-fd278f43d16f42a09d2019af8cba89b52025-02-03T10:07:37ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382011-06-012910.1260/0263-6174.29.6.541Nickel(II) Ion Adsorption onto Activated Carbon. Relationship between Physicochemical Properties and Adsorption CapacityPaola Rodríguez-Estupiñán0Liliana Giraldo1Juan Carlos Moreno-Piraján2 Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, Bogotá DC, Colombia Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, Bogotá DC, Colombia Porous Solids and Calorimetry Group, Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, Colombia D.C.The adsorption of nickel(II) ions from aqueous solution onto various forms of granular activated carbon, GAC, has been studied. Thus, GAC was heat-treated at 900 °C (GAC 900), oxidized with HNO 3 (GACox), and this material subsequently heat-treated in an inert atmosphere at 450 °C and 750 °C (GACox 450 and GACox 750), all with the objective of changing the total acidity of the samples and demonstrating its influence on the adsorption capacity. The solids were characterized by N 2 and CO 2 adsorption isotherms from which the micropore volumes and surface areas were calculated — the latter being between 816 and 935 m 2 /g. In addition, some chemical characteristics such as the pH of the point of zero charge, the total acidity and basicity were examined, while immersion calorimetric studies in water were undertaken. The experimental results showed that the quantity of nickel(II) ions adsorbed onto the various GAC samples followed the order: GACox < GAC < GACox 450 < GACox 750 > GAC 900, indicating that the adsorption capacity depended largely on the surface acidity of the solid samples.https://doi.org/10.1260/0263-6174.29.6.541 |
| spellingShingle | Paola Rodríguez-Estupiñán Liliana Giraldo Juan Carlos Moreno-Piraján Nickel(II) Ion Adsorption onto Activated Carbon. Relationship between Physicochemical Properties and Adsorption Capacity Adsorption Science & Technology |
| title | Nickel(II) Ion Adsorption onto Activated Carbon. Relationship between Physicochemical Properties and Adsorption Capacity |
| title_full | Nickel(II) Ion Adsorption onto Activated Carbon. Relationship between Physicochemical Properties and Adsorption Capacity |
| title_fullStr | Nickel(II) Ion Adsorption onto Activated Carbon. Relationship between Physicochemical Properties and Adsorption Capacity |
| title_full_unstemmed | Nickel(II) Ion Adsorption onto Activated Carbon. Relationship between Physicochemical Properties and Adsorption Capacity |
| title_short | Nickel(II) Ion Adsorption onto Activated Carbon. Relationship between Physicochemical Properties and Adsorption Capacity |
| title_sort | nickel ii ion adsorption onto activated carbon relationship between physicochemical properties and adsorption capacity |
| url | https://doi.org/10.1260/0263-6174.29.6.541 |
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