Tekstil Atık Sularındaki Organik Kirleticilerin Arıtılmasında Endüstriyel Demir-Çelik Cürufu Tabanlı Heterojen Fenton Benzeri Katalizörlerin Geliştirilmesi ve Performans Analizi

Öz

Tekstil endüstrisi atık suları, içerdikleri sentetik boyarmaddeler ve yüksek kimyasal oksijen ihtiyacı (KOİ) nedeniyle ciddi çevre sorunlarına yol açmaktadır. Bu çalışmada, bir endüstriyel atık olan demir-çelik cürufu, heterojen Fenton benzeri proseslerde kullanılmak üzere düşük maliyetli ve yüksek verimli bir katalizör olarak değerlendirilmiştir. Cürufun yapısındaki demir oksitler aktif merkez olarak işlev görmüş ve hidrojen peroksit (H₂O₂) varlığında reaktif oksijen türlerinin (.OH) oluşumunu göstermektedir. Reaktiviteyi artırmak amacıyla cüruf örnekleri asit aktivasyonu ve termal modifikasyona tabi tutulmuştur. Modifiye edilen katalizörün Metilen Mavisi (MM) ve Reaktif Siyah 5 (RS5) boyarmaddelerinin giderimindeki performansı; katalizör dozu, (H₂O₂) konsantrasyonu, pH ve sıcaklık parametreleri altında incelenmiştir. Optimize edilen koşullarda pH: 3.5, Katalizör: 2.0 g L^-1, (H₂O₂) maksimum düzeyde KOİ azaltımı elde edilmiştir. Katalizörün ardışık 5 çevrim sonunda kararlılığını koruduğu ve demir sızıntısının (leaching) yasal sınırların altında kaldığı tespit edilmiştir. Bu çalışma, endüstriyel bir atığın çevre teknolojilerinde ileri oksidasyon prosesi (İOP) katalizörü olarak döngüsel ekonomi modeline uygun şekilde geri kazanılabileceğini göstermektedir.

Anahtar Kelimeler

• Demir-çelik cürufu
• heterojen fenton
• tekstil atık suları
• ileri oksidasyon prosesleri
• geri kazanım

Destekleyen Kurum

Gümüşhane Üniversitesi

Teşekkür

Her zaman desteğini esirgemeyen aileme teşekkür ederim.

Development and Performance Analysis of Industrial Iron-Steel Slag-Based Heterogeneous Fenton-Like Catalysts for the Treatment of Organic Pollutants in Textile Wastewaters

Öz

Textile industry wastewater causes serious environmental problems due to the synthetic dyestuffs they contain and the high chemical oxygen demand (COD). In this study, iron-steel blast furnace slag, an industrial waste, was evaluated as a low-cost and high-efficiency catalyst for use in heterogeneous Fenton-like processes. The iron oxides in the slag structure functioned as active centers and, in the presence of hydrogen peroxide (H₂O₂), generated reactive oxygen species (It triggered the formation of OH). To increase reactivity, slag samples were subjected to acid activation and thermal modification. The performance of the modified catalyst in the removal of Methylene Blue (MM) and Reactive Black 5 (RS5) dyestuffs was examined under the parameters of catalyst dose, (H₂O₂) concentration, pH and temperature. Under optimized conditions (pH: 3.5, Catalyst: 2.0 g L^-1, (H₂O₂) maximum COD reduction was achieved. It was found that the catalyst maintained its stability at the end of 5 consecutive cycles and the iron leakage (leaching) remained below the legal limits. This study proves that an industrial waste can be recovered in accordance with the circular economy model as an advanced oxidation process (IOP) catalyst in environmental technologies.

Anahtar Kelimeler

• Iron and steel slag
• heterogeneous fenton
• textile wastewater
• advanced oxidation processes
• recycling

Kaynakça

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