The Adsorption Kinetics of Cethyltrimethylammonium Bromide (CTAB) onto Powdered Active Carbon |
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| Authors: | YalÇin Mehmet GÜrses Ahmet Doğar Çetin SÖZBİLİr Mustafa |
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| Affiliation: | (1) Department of Chemistry, KK Education Faculty, Atatürk University, Erzurum, 25240, Turkey;(2) Department of Science Education, Erzincan Education Faculty, Atatürk University, Erzincan, 24030, Turkey;(3) Department of Chemistry, KK Education Faculty, Atatürk University, Erzurum, 25240, Turkey |
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| Abstract: | This study investigates the adsorption kinetics of CTAB (cethyltrimethylammonium bromide), a cationic surfactant, onto PAC from aqueous solution with respect to the initial CTAB concentration at 20 C. The pseudo-first-order, second-order kinetic models and intraparticle diffusion model were used to describe the kinetic data and the rate constants were calculated. The rate parameter, ki, of intraparticle diffusion, the rate parameter, k2, of the pseudo-second-order and k1, the rate parameter for the pseudo-first-order mechanism were compared. It was found that the pseudo-second-order adsorption mechanism is predominant and the overall rate of the CTAB adsorption process appears to be controlled by more than one step, namely both the external mass transfer and intraparticle diffusion mechanisms. |
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| Keywords: | adsorption kinetics CTAB powdered active carbon pseudo-first order kinetics pseudo-second order kinetics intraparticle diffusion |
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