Adsorption of Zinc and Copper Ions by the Solid Waste of the Olive Oil Industry
The adsorption capacity of dried olive oil husks (SWOOI) for zinc ions (Zn 2+ ) and copper ions (Cu 2+ ) was studied. It was verified that the Freundlich and Langmuir isotherms describe the adsorption of Cu 2+ and Zn 2+ ions reasonably well. Up to 90% of Zn 2+ ions and 80% of Cu 2+ ions were adsorbe...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2001-03-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263617011494024 |
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| Summary: | The adsorption capacity of dried olive oil husks (SWOOI) for zinc ions (Zn 2+ ) and copper ions (Cu 2+ ) was studied. It was verified that the Freundlich and Langmuir isotherms describe the adsorption of Cu 2+ and Zn 2+ ions reasonably well. Up to 90% of Zn 2+ ions and 80% of Cu 2+ ions were adsorbed from aqueous solutions when the initial adsorbent and metal concentrations were 30 mg/ml and 20 ppm, respectively. An increase in the SWOOI concentration resulted in greater metal removal from the aqueous solution, and an increase in Zn 2+ ion or Cu 2+ ion concentration at constant SWOOI concentration increased the metal loading per unit weight of the adsorbent. An increase in the initial pH of the metal solutions enhanced the SWOOI adsorption process. The uptake of Zn 2+ ions was also enhanced by decreasing the SWOOI particle size. The presence of a high concentration of soft ions (Na + ) strongly suppressed the uptake of Zn 2+ ions by SWOOI. |
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| ISSN: | 0263-6174 2048-4038 |