Temperature and pH Effect on the Sorption of Divalent Metal Ions by Silica Gel
The sorption of Zn 2+ , Ni 2+ and Cd 2+ ions by silica gel was studied as a function of ion concentration, pH and temperature. An increase in all three parameters led to an increase in the extent of sorption for all the metal cations studied. The selectivity of the solid was observed to be in the or...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2003-05-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361703322405033 |
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| author | S. Mustafa B. Dilara A. Naeem N. Rehana K. Nargis |
| author_facet | S. Mustafa B. Dilara A. Naeem N. Rehana K. Nargis |
| author_sort | S. Mustafa |
| collection | DOAJ |
| description | The sorption of Zn 2+ , Ni 2+ and Cd 2+ ions by silica gel was studied as a function of ion concentration, pH and temperature. An increase in all three parameters led to an increase in the extent of sorption for all the metal cations studied. The selectivity of the solid was observed to be in the order Zn 2+ > Ni 2+ > Cd 2+ . Sorption of the metal cations was accompanied by the release of H + ions into the bulk phase. On average two moles of H + ions were released per mole of metal cation sorbed. The sorption data fitted the linear forms of both the Kurbatov and Langmuir adsorption equations. The values of the binding constants were used to estimate the apparent thermodynamic parameters, ΔH and ΔS, for the adsorption process. FT-IR spectroscopic studies also showed that the uptake of metal cations by the silica gel occurred via a cation-exchange process. |
| format | Article |
| id | doaj-art-50a915cda4944bf1adfa643ee29cbca6 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2003-05-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-50a915cda4944bf1adfa643ee29cbca62025-01-03T00:10:28ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382003-05-012110.1260/026361703322405033Temperature and pH Effect on the Sorption of Divalent Metal Ions by Silica GelS. MustafaB. DilaraA. NaeemN. RehanaK. NargisThe sorption of Zn 2+ , Ni 2+ and Cd 2+ ions by silica gel was studied as a function of ion concentration, pH and temperature. An increase in all three parameters led to an increase in the extent of sorption for all the metal cations studied. The selectivity of the solid was observed to be in the order Zn 2+ > Ni 2+ > Cd 2+ . Sorption of the metal cations was accompanied by the release of H + ions into the bulk phase. On average two moles of H + ions were released per mole of metal cation sorbed. The sorption data fitted the linear forms of both the Kurbatov and Langmuir adsorption equations. The values of the binding constants were used to estimate the apparent thermodynamic parameters, ΔH and ΔS, for the adsorption process. FT-IR spectroscopic studies also showed that the uptake of metal cations by the silica gel occurred via a cation-exchange process.https://doi.org/10.1260/026361703322405033 |
| spellingShingle | S. Mustafa B. Dilara A. Naeem N. Rehana K. Nargis Temperature and pH Effect on the Sorption of Divalent Metal Ions by Silica Gel Adsorption Science & Technology |
| title | Temperature and pH Effect on the Sorption of Divalent Metal Ions by Silica Gel |
| title_full | Temperature and pH Effect on the Sorption of Divalent Metal Ions by Silica Gel |
| title_fullStr | Temperature and pH Effect on the Sorption of Divalent Metal Ions by Silica Gel |
| title_full_unstemmed | Temperature and pH Effect on the Sorption of Divalent Metal Ions by Silica Gel |
| title_short | Temperature and pH Effect on the Sorption of Divalent Metal Ions by Silica Gel |
| title_sort | temperature and ph effect on the sorption of divalent metal ions by silica gel |
| url | https://doi.org/10.1260/026361703322405033 |
| work_keys_str_mv | AT smustafa temperatureandpheffectonthesorptionofdivalentmetalionsbysilicagel AT bdilara temperatureandpheffectonthesorptionofdivalentmetalionsbysilicagel AT anaeem temperatureandpheffectonthesorptionofdivalentmetalionsbysilicagel AT nrehana temperatureandpheffectonthesorptionofdivalentmetalionsbysilicagel AT knargis temperatureandpheffectonthesorptionofdivalentmetalionsbysilicagel |