Sorption of Metal Ions on a Mixed Oxide [0.5 M SiO:0.5 M Fe(OH)]
The sorption of Zn 2+ , Ni 2+ , Cd 2+ , Ca 2+ and Mg 2+ ions on to a mixed oxide of iron and silicon was found to increase with increasing temperature, concentration and pH of the system. The selectivity of this mixed oxide was Cd 2+ ≥ Zn 2 + ≥ Ni 2+ > Ca 2+ > Mg 2+ , indicating that the mixed...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2002-04-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361702760254414 |
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| _version_ | 1841561905854939136 |
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| author | S. Mustafa B. Dilara A. Naeem N. Rahana P. Shahida |
| author_facet | S. Mustafa B. Dilara A. Naeem N. Rahana P. Shahida |
| author_sort | S. Mustafa |
| collection | DOAJ |
| description | The sorption of Zn 2+ , Ni 2+ , Cd 2+ , Ca 2+ and Mg 2+ ions on to a mixed oxide of iron and silicon was found to increase with increasing temperature, concentration and pH of the system. The selectivity of this mixed oxide was Cd 2+ ≥ Zn 2 + ≥ Ni 2+ > Ca 2+ > Mg 2+ , indicating that the mixed oxide was more selective as an exchanger towards Cd 2+ ions relative to its components, SiO 2 and Fe(OH) 3 . The sorption data fitted the linear forms of the Kurbatov and Langmuir adsorption equations. The sorption of metal cations was accompanied by the release of H + ions to the bulk phase. On average 1 mol H + was released for every cation sorbed. The values of the binding constants were used to estimate the apparent thermodynamic parameters, ΔH and ΔS. The phenomenon of enthalpy/entropy compensation showed that the adsorption of metal ions by the mixed oxide occurred typically through a cation-exchange mechanism. |
| format | Article |
| id | doaj-art-1216229621c24c8090cfd884dc26b140 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2002-04-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-1216229621c24c8090cfd884dc26b1402025-01-03T01:19:24ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382002-04-012010.1260/026361702760254414Sorption of Metal Ions on a Mixed Oxide [0.5 M SiO:0.5 M Fe(OH)]S. MustafaB. DilaraA. NaeemN. RahanaP. ShahidaThe sorption of Zn 2+ , Ni 2+ , Cd 2+ , Ca 2+ and Mg 2+ ions on to a mixed oxide of iron and silicon was found to increase with increasing temperature, concentration and pH of the system. The selectivity of this mixed oxide was Cd 2+ ≥ Zn 2 + ≥ Ni 2+ > Ca 2+ > Mg 2+ , indicating that the mixed oxide was more selective as an exchanger towards Cd 2+ ions relative to its components, SiO 2 and Fe(OH) 3 . The sorption data fitted the linear forms of the Kurbatov and Langmuir adsorption equations. The sorption of metal cations was accompanied by the release of H + ions to the bulk phase. On average 1 mol H + was released for every cation sorbed. The values of the binding constants were used to estimate the apparent thermodynamic parameters, ΔH and ΔS. The phenomenon of enthalpy/entropy compensation showed that the adsorption of metal ions by the mixed oxide occurred typically through a cation-exchange mechanism.https://doi.org/10.1260/026361702760254414 |
| spellingShingle | S. Mustafa B. Dilara A. Naeem N. Rahana P. Shahida Sorption of Metal Ions on a Mixed Oxide [0.5 M SiO:0.5 M Fe(OH)] Adsorption Science & Technology |
| title | Sorption of Metal Ions on a Mixed Oxide [0.5 M SiO:0.5 M Fe(OH)] |
| title_full | Sorption of Metal Ions on a Mixed Oxide [0.5 M SiO:0.5 M Fe(OH)] |
| title_fullStr | Sorption of Metal Ions on a Mixed Oxide [0.5 M SiO:0.5 M Fe(OH)] |
| title_full_unstemmed | Sorption of Metal Ions on a Mixed Oxide [0.5 M SiO:0.5 M Fe(OH)] |
| title_short | Sorption of Metal Ions on a Mixed Oxide [0.5 M SiO:0.5 M Fe(OH)] |
| title_sort | sorption of metal ions on a mixed oxide 0 5 m sio 0 5 m fe oh |
| url | https://doi.org/10.1260/026361702760254414 |
| work_keys_str_mv | AT smustafa sorptionofmetalionsonamixedoxide05msio05mfeoh AT bdilara sorptionofmetalionsonamixedoxide05msio05mfeoh AT anaeem sorptionofmetalionsonamixedoxide05msio05mfeoh AT nrahana sorptionofmetalionsonamixedoxide05msio05mfeoh AT pshahida sorptionofmetalionsonamixedoxide05msio05mfeoh |