Title: Degradation of carbofuran-contaminated water by the Fenton process
Authors: Ma, Ying-Shih
Kumar, Mathava
Lin, Jih-Gaw
環境工程研究所
Institute of Environmental Engineering
Keywords: Carbofuran;Fenton process;central composite design (CCD);intermediates;degradation pathway
Issue Date: 15-Jul-2009
Abstract: In this study, the Fenton process was applied for the degradation of carbofuran from aqueous system. Batch experiments were conducted at two different carbofuran concentrations i.e., 10 and 50 mg/L, and at pH 3. Batch experiments at each carbofuran concentration were designed by central composite design (CCD) with two independent variables i.e. Fe(2+) and H(2)O(2). Experimental results indicate that more than 90% of carbofuran removal was observed within 5 mins of Fenton reaction at 5 mg/L of Fe(2+) concentration and 100 mg/L of H(2)O(2) concentration. Increases in Fe(2+) and/or H(2)O(2) concentrations beyond 5 and 100 mg/L, respectively produced 100% carbofuran removal. Based on the experimental observations, the optimal Fe(2+) and H(2)O(2) dosages required for 10 mg/L of aqueous carbofuran removal were estimated as 7.4 and 143 mg/L, respectively. During this study, three carbofuran intermediates such as 7-benzofuranol,2,3,-dihydro-2,2-dimethyl, 7-hydroxy-2,2-dimethyl-benzofuran-3-one and 1,4-Benzene-di- carboxaldehyde were identified using GC/MS analyses.
URI: http://dx.doi.org/10.1080/10934520902958807
http://hdl.handle.net/11536/6952
ISSN: 1093-4529
DOI: 10.1080/10934520902958807
Journal: JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
Volume: 44
Issue: 9
Begin Page: 914
End Page: 920
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