Mineralization of sulfamethizole in photo-Fenton and photo-Fenton-like systems

descriptionPublicationkeyboard_double_arrow_right Article 27 Oct 2015 English Publisher:IWA PublishingJournal:Water Science and Technology, volume 73, pages 746-750 (issn: 0273-1223, eissn: 1996-9732,

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Authors: C H, Wu; J T, Wu; Y H, Lin;

doi: 10.2166/wst.2015.554

pmid: 26901716

Mineralization of sulfamethizole in photo-Fenton and photo-Fenton-like systems

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Abstract

In this investigation, UV/H2O2, UV/H2O2/Fe2+ (photo-Fenton) and UV/H2O2/Fe3+ (photo-Fenton-like) systems were used to mineralize sulfamethizole (SFZ). The optimal doses of H2O2 (1–20 mM) in UV/H2O2 and iron (0.1–1 mM) in photo-Fenton and photo-Fenton-like systems were determined. Direct photolysis by UV irradiation and direct oxidation by added H2O2, Fe2+ and Fe3+ did not mineralize SFZ. The optimal dose of H2O2 was 10 mM in UV/H2O2 and that of iron (Fe2+ or Fe3+) was 0.2 mM in both UV/H2O2/Fe2+ and UV/H2O2/Fe3+ systems. Under the best experimental conditions and after 60 min of reaction, the SFZ mineralization percentages in UV/H2O2, UV/H2O2/Fe2+ and UV/H2O2/Fe3+ systems were 16, 90 and 88%, respectively. The UV/H2O2/Fe2+ and UV/H2O2/Fe3+ systems effectively mineralized SFZ.

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Keywords

Photolysis, Ultraviolet Rays, Iron, Sulfamethizole, Hydrogen Peroxide, Oxidation-Reduction, Environmental Restoration and Remediation, Water Pollutants, Chemical

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