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Water Science & Technology Vol 66 No 10 pp 2209–2216 © IWA Publishing 2012 doi:10.2166/wst.2012.439 Quantum efficiencies of the photo-Fenton degradation of atrazine in waterT. B. Benzaquén, M. A. Isla and O. M. AlfanoINTEC (UNL- CONICET), Ruta Nacional N° 168, 3000 Santa Fe, Argentina E-mail: alfano@santafe-conicet.gov.arFICH, UNL, 3000 Santa Fe, Argentina ABSTRACT An experimental work in a well-stirred batch recycling reactor for the photo-Fenton degradation of atrazine in water is presented. A study of the quantum efficiency is performed to assess the effectiveness of the photo-Fenton process on the atrazine degradation and total organic carbon (TOC) mineralization. Apparent and absolute quantum efficiencies of degradation and mineralization of an atrazine-based commercial herbicide are determined under different experimental conditions. Higher apparent efficiencies were found for both atrazine degradation and TOC mineralization when the ferric ion and hydrogen peroxide concentrations are increased. Because of the well known stability of the triazine ring, atrazine was not completely mineralized by the photo-Fenton process. However, a TOC reduction of 40% was achieved, being 62.5% of the maximum value that can be reached. Keywords: atrazine; photo-Fenton; quantum efficiencies eProduct: Buy this article for £24.00 (IWA MEMBER PRICE: £18.00) All prices include VAT. For customers where VAT should not be applied, the VAT amount will be removed upon payment |
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