Investigation of a basic dye adsorption from aqueous solution onto raw and pre-treated sepiolite surfaces

Eren E., Afsin B.

DYES AND PIGMENTS, vol.73, no.2, pp.162-167, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 73 Issue: 2
  • Publication Date: 2007
  • Doi Number: 10.1016/j.dyepig.2005.11.004
  • Journal Name: DYES AND PIGMENTS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.162-167
  • Keywords: thermodynamics, cationic dye, charge reversal, adsorption isotherm, crystal violet, sepiolite, METHYLENE-BLUE, MODEL-CALCULATIONS, PORE STRUCTURE, MONTMORILLONITE, EXCHANGE, CATIONS, CLAY, SOILS
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

The temperature, pH and ionic strength effects on the adsorption of crystal violet (CV) by raw, base activated and Al-saturated sepiolite samples were studied. Al-saturated sepiolite has relatively weak ability for CV adsorption compared to the raw clay, whereas the highest adsorption observed for the base activated sepiolite may be due to the Na+ ions replaced part of Mg2+ located at the edges of the channels. Different thermodynamic parameters for raw and pre-treated sepiolite samples indicate the adsorption of the dye component on a non-uniform surface. (c) 2005 Elsevier Ltd. All rights reserved.