Abstract：
:The electro-Fenton process was used to assess the degradation of methyl parathion (MP) in aqueous solutions. This oxidation process allows the production of hydroxyls radicals which react on the organic compounds, leading to their mineralization. Degradation experiments were performed either in perchloric, sulphuric, hydrochloric and nitric acid media under current controlled electrolysis conditions at different pH. The pH effect as well as the nature of the medium (i.e., the nature of the ions present in medium) on the degradation and mineralization efficiency were studied. The mineralization of the initial pollutant was investigated by total organic carbon measurements which show a complete mineralization at pH 3 in perchloric medium. The absolute rate constant of MP hydroxylation reaction was determined as (4.20+/-0.11)x10(9)M(-1)s(-1). Complete degradation of MP and its metabolites occur in less than 45min. Degradation reaction intermediates such as aromatic compounds, carboxylic acids and inorganic ions were identified and a mineralization pathway is proposed.
journal_name
Chemospherejournal_title
Chemosphereauthors
Diagne M,Oturan N,Oturan MAdoi
10.1016/j.chemosphere.2006.06.033subject
Has Abstractpub_date
2007-01-01 00:00:00pages
841-8issue
5eissn
0045-6535issn
1879-1298pii
S0045-6535(06)00767-3journal_volume
66pub_type
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