The effect of cathode material, current density and anode-cathode gap on the COD and color removal from leachate by the electro-Fenton method

Atmaca K., BEYAZIT N.

DESALINATION AND WATER TREATMENT, cilt.201, ss.431-437, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 201
  • Basım Tarihi: 2020
  • Doi Numarası: 10.5004/dwt.2020.25917
  • Dergi Adı: DESALINATION AND WATER TREATMENT
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Agricultural & Environmental Science Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, CAB Abstracts, Environment Index, Geobase, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.431-437
  • Anahtar Kelimeler: Chemical oxygen demand (COD), Color, Electro-Fenton, Leachate, Removal, LANDFILL LEACHATE, WASTE-WATER, OXIDATION, ELECTROCOAGULATION
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

In this study, the effects of different cathode electrodes (stainless-steel, graphite, carbon cloth), current density (25-125 A/m(2)), the distance between electrodes (0.5-1.5 cm) on chemical oxygen demand (COD) and color removal from leachate by the electro-Fenton process were investigated. Under the optimum experimental conditions (pH: 3, current density: 100 A/m(2), H2O2 concentration: 2,000 mg/L, stirring rate: 250 rpm, the distance between electrodes: 1.5 cm) a maximum COD removal of 82.5% was achieved with an electrical energy consumption of 0.75 kWh/m(3). The optimum conditions for color removal were pH: 3, current density: 75A/m(2), H2O2 concentration: 2,000 mg/L, stirring rate: 250 rpm, the distance between electrodes 1.5 cm. Under these conditions, a maximum color removal of 69% from leachate was achieved with an electrical energy consumption of 0.108 kWh/m(3). According to the Water Pollution and Control Regulation in force in our country, it is understood that 700 mg/L and 290 Pt-Co values cannot be provided for COD and color parameters, respectively. This result concluded that this advanced oxidation process alone was not sufficient for the landfill leachate used in this study.