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Research Journal of Environmental Toxicology

Year: 2010 | Volume: 4 | Issue: 1 | Page No.: 1-12
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Authors

Saad A. Al-Jlil

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Research Article

Equilibrium Study of Adsorption of Cobalt ions from Wastewater using Saudi Roasted Date Pits

Saad A. Al-Jlil
Date pits from Al-Qassim region, Saudi Arabia were collected, roasted and characterized for the adsorption of cobalt ions from wastewater. Also, the effect of pH of solution and different temperatures on the adsorption of cobalt ions by roasted date pits were studied. The adsorption capacity of roasted date pits decreased with an increase in the temperature of adsorption systems. The Langmuir, Freundlich, Redlich-Peterson and Thoth models were applied. It was found that, the Langmuir and Redlich-Peterson models explained the experimental data very well at different temperatures. The mean maximum adsorption capacity of roasted date pits for Co ions was 6.28 mg g-1 at 20°C and 4.11 mg g-1 at 80°C. Overall, the adsorption phenomena of Co ions is an exothermic and non-spontaneous process.
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