Journals / Politeknik Dergisi / 2017 / Cilt: 20 - Sayı: 1

Bisfenol-A'nın GörünürBölge Işığındave Fe/TiO2Katalizörü üzerindeHeterojenFoto-Fenton-Tipi Oksidasyonu üzerine Parametrik Çalışma

A Parametric Study on the Heterogeneous Photo- Fenton-Like Oxidation of Bisphenol-A over an Fe/TiO2 Catalyst under Visible Light

Pages
25–36
DOI
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⚡ TL;DR(Too Long; Didn't Read)

The degradation of BPA was described by the first order kinetics with an activation energy of 22.5 kJ/Mol

📌 3 Key Takeaways

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Objective & Hypothesis:In this study the oxidation of Bisphenol-A (BPA) was investigated using heterogeneous photo-Fenton-like oxidation under visible light irradiation over iron containing TiO2 catalysts.
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Key Findings & Data:The catalysts were prepared by the incipient wetness impregnation method with different iron contents (1 and 5 wt%) and characterized by XRD, SEM, FT-IR, nitrogen adsorption, UV-Vis DRS, and ICPAES measurements.
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Conclusion & Impact:The degradation of BPA was described by the first order kinetics with an activation energy of 22.5 kJ/Mol
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study the oxidation of Bisphenol-A (BPA) was investigated using heterogeneous photo-Fenton-like oxidation under visible light irradiation over iron containing TiO2 catalysts. The catalysts were prepared by the incipient wetness impregnation method with different iron contents (1 and 5 wt%) and characterized by XRD, SEM, FT-IR, nitrogen adsorption, UV-Vis DRS, and ICPAES measurements. Among the prepared catalysts the 1 wt% iron containing the TiO2 catalyst showed better catalytic activity (with a chemical oxygen demand (COD) reduction of 65.4% at the end of 6h of oxidation) than the other catalysts. The effects of the parameters such as the initial BPA concentration, H2O2 amount, catalyst amount, the pH of the initial BPA solution, and reaction temperature were studied with that catalyst on the heterogeneous photo-Fenton-like oxidation of an aqueous BPA solution. The small amount of iron that leached to the solution and the reusability of the catalyst illustrates that the process is mainly the heterogeneous photo-Fenton-like process, instead of the homogeneous photo-Fenton-like process. The degradation of BPA was described by the first order kinetics with an activation energy of 22.5 kJ/Mol

Özet

Bu çalışmada Bisfenol-A'nın (BPA) demir içeren TiO2 katalizörleri ve görünür bölge ışığı varlığında heterojen foto-Fenton-tipi oksidasyonu incelenmiştir. Bu bağlamda, öncelikle farklı demir miktarlarında (ağırlıkça %1 ve %5) ıslatarak emdirme yöntemiyle TiO2 katalizörler hazırlanmış ve XRD, SEM, FTIR, Azot Adsorpsiyon, UV-Vis DRS ve ICP-AES teknikleri ile karakterize edilmiştir. En iyi aktivite gösteren ağırlıkça %1 demir içeren TiO2 katalizörü ile BPA'nın heterojen foto-Fenton tipi oksidasyonunda 6 saat sonunda %65,4'lük COD (Kimyasal Oksijen İhtiyacı) giderimi elde edilmiştir. BPA'nın heterojen fotoFenton-tipi oksidasyonuna, BPA başlangıç derişimi, H2O2 ve katalizör miktarları, BPA çözeltisinin başlangıç pH değeri ve reaksiyon sıcaklığının etkileri incelenmiştir. Çözeltiye özütlenen demir miktarının düşük olması ve katalizörün yeniden kullanılabilirliğinin yüksek olması, reaksiyonun homojen foto-Fenton-tipi oksidasyonundan ziyade heterojen foto-Fenton-tipi oksidasyonu olduğunu göstermektedir. Çalışmada BPA bozunma kinetiği de incelenmiş, bozunmanın birinci mertebeye uyduğu gözlenmiş ve aktivasyon enerjisi 22,5 kJ/Mol olarak hesaplanmıştır

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Cite This Article

DÜKKANCI, M. (2017). Bisfenol-A'nın GörünürBölge Işığındave Fe/TiO2Katalizörü üzerindeHeterojenFoto-Fenton-Tipi Oksidasyonu üzerine Parametrik Çalışma. Politeknik Dergisi, Cilt: 20 - Sayı: 1, 25–36. https://ajindex.com/articles/306509

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