Treatment of wastewater contaminated with cobalt using Saudi activated bentonite
In this study, removal of cobalt from wastewater using Saudi activated clay (bentonite) was investigated. The removal characteristics were investigated under various operating variables such as contact time, solution pH, clay dosage and initial metal concentration. It was found that adsorption of co...
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| Format: | Article |
| Language: | English |
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Elsevier
2014-03-01
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| Series: | Alexandria Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016813001026 |
| _version_ | 1819243029308899328 |
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| author | S.S. Al-Shahrani |
| author_facet | S.S. Al-Shahrani |
| author_sort | S.S. Al-Shahrani |
| collection | DOAJ |
| description | In this study, removal of cobalt from wastewater using Saudi activated clay (bentonite) was investigated. The removal characteristics were investigated under various operating variables such as contact time, solution pH, clay dosage and initial metal concentration. It was found that adsorption of cobalt ions on Saudi activated bentonite was relatively fast and the equilibrium was reached after 30 min. Adsorption was also dependent on solution pH where cobalt removal percentage gradually increased with increasing solution pH up to 99% at pH 8. Moreover, about 100% cobalt removal was observed when solution pH was increased to more than 8. The results showed that increasing the initial cobalt concentration decreased cobalt removal percentage due to saturation of clay with cobalt ions. The adsorption isotherm data were well fitted with both the linearized Langmuir and Freundlich models. Furthermore, the value of the mean free energy determined with the D–R equation showed that adsorption process is chemisorptions. Cobalt adsorption into Saudi activated bentonite was well represented by the pseudo-second-order kinetic model. |
| first_indexed | 2024-12-23T14:49:12Z |
| format | Article |
| id | doaj.art-f72d60e0c7f8409da33a5feac2508fde |
| institution | Directory Open Access Journal |
| issn | 1110-0168 |
| language | English |
| last_indexed | 2024-12-23T14:49:12Z |
| publishDate | 2014-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj.art-f72d60e0c7f8409da33a5feac2508fde2022-12-21T17:43:01ZengElsevierAlexandria Engineering Journal1110-01682014-03-0153120521110.1016/j.aej.2013.10.006Treatment of wastewater contaminated with cobalt using Saudi activated bentoniteS.S. Al-ShahraniIn this study, removal of cobalt from wastewater using Saudi activated clay (bentonite) was investigated. The removal characteristics were investigated under various operating variables such as contact time, solution pH, clay dosage and initial metal concentration. It was found that adsorption of cobalt ions on Saudi activated bentonite was relatively fast and the equilibrium was reached after 30 min. Adsorption was also dependent on solution pH where cobalt removal percentage gradually increased with increasing solution pH up to 99% at pH 8. Moreover, about 100% cobalt removal was observed when solution pH was increased to more than 8. The results showed that increasing the initial cobalt concentration decreased cobalt removal percentage due to saturation of clay with cobalt ions. The adsorption isotherm data were well fitted with both the linearized Langmuir and Freundlich models. Furthermore, the value of the mean free energy determined with the D–R equation showed that adsorption process is chemisorptions. Cobalt adsorption into Saudi activated bentonite was well represented by the pseudo-second-order kinetic model.http://www.sciencedirect.com/science/article/pii/S1110016813001026Cobalt removalSaudi bentoniteCobalt adsorptionHeavy metals removalAdsorption isotherm |
| spellingShingle | S.S. Al-Shahrani Treatment of wastewater contaminated with cobalt using Saudi activated bentonite Alexandria Engineering Journal Cobalt removal Saudi bentonite Cobalt adsorption Heavy metals removal Adsorption isotherm |
| title | Treatment of wastewater contaminated with cobalt using Saudi activated bentonite |
| title_full | Treatment of wastewater contaminated with cobalt using Saudi activated bentonite |
| title_fullStr | Treatment of wastewater contaminated with cobalt using Saudi activated bentonite |
| title_full_unstemmed | Treatment of wastewater contaminated with cobalt using Saudi activated bentonite |
| title_short | Treatment of wastewater contaminated with cobalt using Saudi activated bentonite |
| title_sort | treatment of wastewater contaminated with cobalt using saudi activated bentonite |
| topic | Cobalt removal Saudi bentonite Cobalt adsorption Heavy metals removal Adsorption isotherm |
| url | http://www.sciencedirect.com/science/article/pii/S1110016813001026 |
| work_keys_str_mv | AT ssalshahrani treatmentofwastewatercontaminatedwithcobaltusingsaudiactivatedbentonite |