Equilibrium and kinetics for the sorption of promethazine hydrochloride onto K10 montmorillonite

Gereli G., SEKİ Y., Kusoglu I. M., YURDAKOÇ M. K.

JOURNAL OF COLLOID AND INTERFACE SCIENCE, vol.299, no.1, pp.155-162, 2006 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 299 Issue: 1
  • Publication Date: 2006
  • Doi Number: 10.1016/j.jcis.2006.02.012
  • Journal Name: JOURNAL OF COLLOID AND INTERFACE SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.155-162
  • Keywords: K10, adsorption, kinetic, thermodynamic parameters, SEM, AQUEOUS-SOLUTIONS, WASTE-WATER, ADSORPTION, REMOVAL, CLAY, BENTONITE, MECHANISM, RELEASE, BLUE, DYE
  • Dokuz Eylül University Affiliated: Yes

Abstract

This study presents the adsorption of cationic drug, promethazine hydrochloride from aqueous solution onto K 10 montmorillonite. The effects of pH and temperature on adsorption process were investigated. Maximum adsorption pH was obtained to be about 7.5. Thermodynamic parameters found in this study depict the exothermic nature of adsorption. The process was favorable and spontaneous. From kinetic studies, it was found that adsorption process obeyed the pseudo-second-order kinetic model. The Langmuir, Freundlich, Dubinin-Radushkevich (DR) models were applied to describe the equilibrium isotherms and the isotherm constants were determined. The fit of the Langmuir and DR models appeared to be good. Physisorption mainly controls the whole adsorption process but chemisorption also shows a particular contribution. (c) 2006 Elsevier Inc. All rights reserved.