Adsorption of Acid Yellow 99 onto DEDMA-sepiolite from aqueous solutions

Ozcan A. S., Ozcan A.

INTERNATIONAL JOURNAL OF ENVIRONMENT AND POLLUTION, vol.34, no.1-4, pp.308-324, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 1-4
  • Publication Date: 2008
  • Doi Number: 10.1504/ijep.2008.020800
  • Journal Name: INTERNATIONAL JOURNAL OF ENVIRONMENT AND POLLUTION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.308-324
  • Keywords: sepiolite, adsorption, acid dye, surfactant, kinetics, isotherms, WATER-SOLUBLE DYE, ORGANIC CATIONS, SORPTION, REMOVAL, KINETICS, MODEL, DIFFUSION
  • Anadolu University Affiliated: Yes

Abstract

The adsorption of Acid Yellow 99 (AY99) onto dodecylethyldimethylammonium (DEDMA)-sepiolite was investigated in aqueous solution in a batch system with respect to pH, contact time and temperature. The surface modification of DEDMA-sepiolite was examined by the FTIR technique. The experimental data fitted very well with the pseudo-second-order kinetic model with the correlation coefficients above 0.985. The Langmuir, Freundlich and Dubinin-Radushkevich (D-R) adsorption isotherm models agree well with experimental data. The Langmuir-isotherm constant (K-L) was used to evaluate the thermodynamic parameters for the adsorption of AY99 onto DEDMA-sepiolite.