The Removal of Acid Violet 90 from Aqueous Solutions Using PANI and PANI/Clinoptilolite Composites: Isotherm and Kinetics


Akti F., OKUR M.

JOURNAL OF POLYMERS AND THE ENVIRONMENT, vol.26, no.11, pp.4233-4242, 2018 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 26 Issue: 11
  • Publication Date: 2018
  • Doi Number: 10.1007/s10924-018-1297-1
  • Title of Journal : JOURNAL OF POLYMERS AND THE ENVIRONMENT
  • Page Numbers: pp.4233-4242

Abstract

Polyaniline (PANI) and polyaniline/Gordes-clinoptilolite (PANI/GC) composite materials were synthesized by the chemical oxidative polymerization technique and used in the adsorption of Acid Violet 90 metal-complex dye (AV 90). The samples were characterized by X-ray diffractions, nitrogen adsorption-desorption isotherms, scanning electron microscopes and Fourier transform infrared. The effect of initial pH (2-8), sorbent dosage (0.5-4.0g/L) and initial dye concentrations (50-400mg/L) on adsorption onto PANI and PANI/GC were examined in a batch system. Langmuir, Freundlich and Temkin isotherm models were used to investigate the adsorption mechanism of AV 90 on PANI and PANI/GC. Langmuir isotherm model for PANI/GC and Freundlich isotherm model for PANI were fitted well with the experimental data. The highest dye uptake capacities were obtained with Langmuir isotherm model as 153.85mg/g and 72.46mg/g for PANI and PANI/GC, respectively. In order to determine the adsorption kinetics, pseudo first-order and second-order kinetic models were studied. As a result, the adsorption of AV 90 dye on PANI and PANI/GC was better identified with Pseudo second-order kinetic model than the first one.