REMOVAL OF COD AND COLOR FROM REACTIVE RED 45 AZO DYE WASTEWATER USING FENTON AND FENTON-LIKE OXIDATION PROCESSES: KINETIC STUDIES

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BAYAR S., Erdogan M.

APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH, cilt.17, sa.2, ss.1517-1529, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 17 Sayı: 2
  • Basım Tarihi: 2019
  • Doi Numarası: 10.15666/aeer/1702_15171529
  • Dergi Adı: APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1517-1529
  • Anahtar Kelimeler: colorant, Fenton reaction, hydroxyl radical, H2O2, kinetic modelling, DECOLORIZATION KINETICS, AQUEOUS-SOLUTION, DEGRADATION, EFFICIENCY, TOXICITY, REAGENT
  • Atatürk Üniversitesi Adresli: Evet

Özet

The present study dealt with the removal of Reactive Red 45 (RR45) azo dye material through Fenton and Fenton-like oxidation processes. The effects of pH, Fe2+ and Fe3+ dosages, hydrogen peroxide (H2O2), concentration of colorant and temperature were evaluated. Removal of the colorant RR45 was monitored by considering color and Chemical Oxygen Demand (COD). Results showed that Fenton process is more efficient than Fenton-like processes in terms of color and COD removal efficiency. A removal efficiency of 91.1% of COD and 99.90% of color was obtained under optimum experimental conditions where initial solution pH was 3, the concentration of RR45 colorant was 200 mg L-1, rates of Fe2+ and H2O2 were 75 mg L-1 and 400 mg L-1, respectively, reaction temperature was 50 degrees C and experiment time was 30 min. In addition, the first order, second order and Behnajady-Modirshahla-Ghanbery (BMG) models were applied and the best results were obtained by BMG model.

The present study dealt with the removal of Reactive Red 45 (RR45) azo dye material through Fenton and Fenton-like oxidation processes. The effects of pH, Fe2+ and Fe3+ dosages, hydrogen peroxide (H2O2), concentration of colorant and temperature were evaluated. Removal of the colorant RR45 was monitored by considering color and Chemical Oxygen Demand (COD). Results showed that Fenton process is more efficient than Fenton-like processes in terms of color and COD removal efficiency. A removal efficiency of 91.1% of COD and 99.90% of color was obtained under optimum experimental conditions where initial solution pH was 3, the concentration of RR45 colorant was 200 mg L-1, rates of Fe2+ and H2O2 were 75 mg L-1 and 400 mg L-1, respectively, reaction temperature was 50ºC and experiment time was 30 min. In addition, the first order, second order and Behnajady-Modirshahla-Ghanbery (BMG) models were applied and the best results were obtained by BMG model.
Keywords: colorant, Fenton reaction, hydroxyl radical, H2O2, kinetic modelling