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, cilt.26, sa.11, ss.4233-4242, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 26 Sayı: 11
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1007/s10924-018-1297-1
  • Dergi Adı: JOURNAL OF POLYMERS AND THE ENVIRONMENT
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.4233-4242
  • Anahtar Kelimeler: Polyaniline, Clinoptilolite, Adsorption, Acid Violet 90 metal-complex dye, POLYANILINE/ZEOLITE COMPOSITES, WASTE-WATER, ADSORPTION, ZEOLITE, IONS, DYES, NANOCOMPOSITES, EQUILIBRIUM, ADSORBENT, FABRICATION
  • Gazi Üniversitesi Adresli: Evet

Özet

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.