Optimization of Electro-Oxidation Process Assisted by S2O82-, H2O2 and O3 Using Graphite Cathode and Multiple Metal Oxide Coated Ti Anodes

Yıl 2024, , 1453 - 1461, 25.09.2024

Nevim Genç , Elif Durna Pişkin

https://doi.org/10.2339/politeknik.1284751

Öz

The treatment of real textile wastewater was carried out in the oxidant assisted electro-oxidation (EO) process, in which coated and uncoated titanium with multiple metal oxides as the anode and graphite rod as the cathode were used. The performance of EO process assisted with S2O82-, H2O2 and O3 as oxidant was evaluated with Pt-Co, number of colors and COD removal efficiencies. Process conditions were optimized with Taguchi Experimental Design. Parameters with significant effects on performance variables were determined with ANOVA. Optimum conditions of the oxidant assisted EO process were determined as RuO2-IrO2-Ti anode, oxidant type S2O82-, pH 3.0, 25 minutes oxidation time. Pt-Co, color number and COD removal efficiencies at optimum conditions were obtained as 83.37%, 82.6 % and 51.17%, respectively. From the ANOVA results, it was determined that the most important operating parameter among all response parameters was the oxidation time.

Anahtar Kelimeler

Electro-oxidation, oxidant, multiple metal oxide coated Ti, graphite, optimization

Grafit Katot ve Karışık Metal Oksit Kaplı Ti Anotların Kullanıldığı S2O82-, H2O2 ve O3 ile Desteklenen Elektro-Oksidasyon Prosesinin Optimizasyonu

Öz

Anot olarak karışık metal oksitler ile kaplanmış ve kaplanmamış titanyum ve katot olarak ise grafit çubuğunun kullanıldığı, oksidant ile desteklenmiş elektro-oksidasyon (EO) prosesinde gerçek tekstil atık suyunun arıtımı gerçekleştirilmiştir. Oksidant olarak S2O82-, H2O2 ve O3 ile desteklenmiş proseslerin performansı, Pt-Co giderim verimi, renk sayısı giderim verimi ve KOİ giderim verimleri ile değerlendirilmiştir. Proses koşulları Taguchi Deney Tasarımı ile optimize edilmiştir. ANOVA ile performans değişkenleri üzerine önemli etkiye sahip parametreler belirlenmiştir. Oksidant destekli EO prosesinin optimum koşulları; RuO2-IrO2-Ti anot, oksidant tipi S2O82-, pH 3,0, oksidasyon süresi 25 dakika olarak belirlenmiştir. Bu koşullarda, Pt-Co, renk sayısı ve KOİ giderim verimleri (%) sırası ile 83,37, 82,6 ve 51,17 olarak elde edilmiştir. ANOVA sonuçlarından tüm yanıt parametreleri için en önemli işletim parametresinin oksidasyon süresi olduğu ortaya çıkmıştır.

Anahtar Kelimeler

Elektro-oksidasyon, oksidant, karışık metal oksit kaplı Ti, grafit, optimizasyon

Kaynakça

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