INFLUENCE OF MODIFICATION OF THE ACTIVATED CARBON ON THE ADSORPTION OF ATRAZINE: EQUILIBRIUM STUDY AND KINETICS
Journal Title: International Journal of Engineering Sciences & Research Technology - Year 30, Vol 5, Issue 9
Abstract
The atrazine removal from aqueous solution on three adsorbents denoted PAC (powder activated carbon), AC-HNO3 (activated carbon modified with HNO3) and AC-Ag (activated carbon modified with silver) was done. The experimental results obtained showed that, the atrazine removal better fitted the Freundlich model for PAC and the Langmuir model for AC-HNO3 and both Langmuir and Freundlich models for AC-Ag. Additionally, we saw that, the physicochemical properties of AC-Ag influenced the removal performances of atrazine. The maximum adsorption capacities were, 476,19 mg/g, 434,78mg/g and 357,14mg/g for PAC, AC-HNO3 and AC-Ag respectively. The Kinetic study performed using the pseudo-first-order, pseudo –second- order and the intraparticle diffusion models. The regression results showed that the pseudo-second-order model fitted better the experimental data for all the three adsorbents. This study revealed that the adsorption of atrazine was influenced by the surface functionalities and was also controlled by a film diffusion mechanism.
Authors and Affiliations
Nkwaju Yanou Rachel*
Keywords
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