Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 161, Issue 2-3, Pages 215-220Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S1010-6030(03)00344-7
Keywords
dimethyl phthalate (DMP); photo-degradation; Fenton reagent; Fe(II); H2O2; hydroxyl radical
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The photochemical degradation of dimethyl phthalate (DMP) in water was investigated under a variety of reaction conditions using hydrogen peroxide and Fe2+ (Fenton reagent) as oxidant. All experiments were conducted under artificial UV light (high pressure Hg lamp). Fenton reagent vigorously enhanced the photo-degradation rate of dimethyl phthalate. The experimental results showed that the optimum conditions were obtained at pH 3 for the UV/H2O2/Fe2+ system, with original H2O2 and Fe2+ concentrations of 5.00x10(-4) and 1.67x10(-4) M, respectively. The photo-degradation percentage of dimethyl phthalate within 120 min was as high as 81% under the optimum conditions. Therefore, the process of photo-Fenton was an effective treatment process under acidic condition and produced a higher photo-degradation percentage of dimethyl phthalate during a very short radiation time. (C) 2004 Elsevier B.V. All rights reserved.
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