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Photo-Fenton degradation of alachlor in the presence of citrate solution

Paper ID Volume ID Publish Year Pages File Format Full-Text
28609 44082 2006 8 PDF Available
Title
Photo-Fenton degradation of alachlor in the presence of citrate solution
Abstract

The photodegradation of alachlor, which is one of acetanilide herbicides, was carried out in the presence of the Fenton reagent (Fe(II) and H2O2) and citrate. The degradation rate was strongly influenced by the pH, and initial concentrations of H2O2, Fe(II) and citrate. An initial alachlor concentration of 10 mg L−1 was completely degraded after 10 min at pH 5 under the optimum conditions. Therefore, it was possible to extend available pH range of the photo-Fenton reaction by the existence of the citrate. The decrease of total organic carbon (TOC) as a result of mineralization of alachlor was observed during the photo-Fenton process with citrate. The degree of alachlor mineralization was about 100% under UV irradiation after 26 h. The formations of chloride, nitrate and ammonium ions as end-products were observed during the photocatalytic system. The decomposition of alachlor gave seven kinds of intermediate products. The degradation mechanism of alachlor was proposed on the base of the evidence of the identified intermediates. Based on these results, UV/Fe(II)–citrate/H2O2 system could be useful technology for the treatment of wastewater containing alachlor.

Keywords
Alachlor degradation; Photo-Fenton reaction; Citrate; Mineralization; Wastewater treatment
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 180, Issues 1–2, 15 May 2006, Pages 38–45
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us