The adsorption kinetics of Cethyltrimethylammonium Bromide (CTAB) onto powdered active carbon


YALCIN M., Gurses A. , DOGAR C., SOZBILIR M.

ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, vol.10, no.4, pp.339-348, 2004 (Journal Indexed in SCI) identifier

  • Publication Type: Article / Article
  • Volume: 10 Issue: 4
  • Publication Date: 2004
  • Title of Journal : ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
  • Page Numbers: pp.339-348

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 20degreesC. 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, k(1), of intraparticle diffusion, the rate parameter, k(2), of the pseudo-second-order and k(1), 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.