The effect of current density and pH on COD and color removal from leachate by the photo-electro-Fenton method

Abstract

Leachate contain high levels of organic and inorganic pollutants, and may cause danger to the environment and human health by mixing with groundwater and surface waters by infiltration and/or runoff. In this study, the removals of COD and color, which are important parameters for the treatment and discharge of leachate, by photo-electro-Fenton method, was investigated under various operating conditions. Operational parameters that are important for the treatment and cost processes were determined and optimized. The effects of current density (10-50 A/m2) and pH (2.5-5.0) on COD and color removal from the leachate by photo-electro-Fenton method were investigated. For optimum experimental conditions (pH: 3, current density: 10 A/m2) maximum 79.75% COD (90 minutes) and 80.57% color (45 minutes) removal efficiencies were obtained with 11.02 and 5.50 kWh/m3 electrical energy consumption. These results showed that the photo-electro-Fenton method can be successfully applied on COD and color removal from leachate.

Keywords

• Leachate
• Photo-electro-Fenton
• COD
• Color
• Removal

Sızıntı suyundan foto-elektro-Fenton yöntemi ile KOİ ve Renk giderimi üzerine akım yoğunluğu ve pH etkisi

Öz

Sızıntı suları yüksek düzeylerde organik ve inorganik kirleticiler içermekte, sızma ve/veya yüzeysel akış ile yeraltı sularına ve yüzeysel sulara karışarak çevre ve insan sağlığı açısından tehlike oluşturabilmektedir. Bu çalışmada, sızıntı sularının arıtımı ve deşarjında önemli parametrelerden olan KOİ ve rengin foto-elektro-Fenton yöntemi ile giderimi çeşitli işletme koşulları altında araştırılmıştır. Arıtma ve maliyet sürecinde önemli olan işletme parametreleri belirlenerek optimize edilmiştir. Sızıntı suyundan foto-elektro-Fenton yöntemi ile KOİ ve renk giderimi üzerine akım yoğunluğu (10-50 A/m2) ve pH (2.5-5.0) etkileri incelenmiştir. Optimum deneysel koşullar için (pH: 3, akım yoğunluğu: 10 A/m2) maksimum %79.75 KOİ (90 dakika) ve %80.57 renk (45 dakika) giderim verimleri 11.02 ve 5.50 kWh/m3 elektrik enerjisi tüketimleri ile elde edilmiştir. Bu sonuçlar, sızıntı suyundan KOİ ve renk giderimi üzerine foto-elektro-Fenton yönteminin başarı ile uygulanabileceğini göstermiştir.

Anahtar Kelimeler

• Sızıntı suyu
• foto-elektro-Fenton
• KOİ
• Renk
• Giderim

Kaynakça

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