The removal of CI acid violet 90 metal-complex dye using synthetic and natural zeolite from aqueous solutions


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OKUR M. , Akti F.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.31, ss.678-687, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 31 Konu: 3
  • Basım Tarihi: 2016
  • Doi Numarası: 10.17341/gummfd.86378
  • Dergi Adı: JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
  • Sayfa Sayıları: ss.678-687

Özet

Manisa-Gordes zeolite (M-GZ) and a synthetic zeolite molecular sieve 10 angstrom (Z-10A) was used as adsorbents for the removal of C. I. Acid Violet 90 (AV 90). The highest dye adsorption was obtained as 93 % with Z-10A, 73% with M-GZ at pH 2. The highest adsorption capacity was obtained as 51.4 mg/g and 1461 mg/g for M-GZ and Z-10A at 150 mg/L initial dye concentration, respectively. Increase of temperature from 303 K to 333 K caused to decrease of dye adsorption on every zeolite. It was observed that equilibrium data was evaluated using Freundlich isotherm model for M-GZ, Temkin isotherm model for Z-10A, pseudo second order kinetic model provided the better fit to the experimental data. While adsorption of AV 90 on zeolites was actualized with only surface adsorption at low dye concentration, it was occured together with both surface and intraparticle diffusion at high dye concentration. Thermodynamic calculations and experimental results indicate that the adsorption was exothermic and spontaneous process.