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Study of the Adsorption of Copper Ion on a New Type of Activated Carbon | ||
| Tikrit Journal of Pure Science | ||
| Article 1, Volume 16, Issue 4, 2011, Pages 70-76 | ||
| Author | ||
| Abraheem Ali Mohammed | ||
| Abstract | ||
| In this study, a new type of activated carbon is prepared from spent lubricant oils by chemical treatment. This carbon is used as adsorbent for the removal of copper ions from aqueous solutions. The adsorption capacity of the carbon is estimated. The effect of contact time, concentration and temperature are investigated. The experimental data of adsorption were fitted to three different isotherms, namely; Langmuir, Freundlich and DKR. The isotherms equations were applied at different temperatures. The results obtained showed that, the Langmuir isotherm is better fitted to the experimental data of the studied system than the other isotherms. In addition the fitting is good at low temperature. Deviations are noticed when temperature is increased. The thermodynamic parameters ∆G°, ∆H, and ∆S are determined at two initial concentrations. Their values and signs indicated that, the adsorption process could occur spontaneously at room temperature. The increase of temperature activates the departure of adsorbed molecules towards the solution. The adsorption system is exothermic in nature. The adsorption process increases the order of the studied system. | ||
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