Abstract：
:The aim of this study was to obtain information about the degradation of t-butyl methyl ether (MTBE; (CH(3))(3)C-O-CH(3)) in atmospheric water droplets (rain, clouds, fog). These water droplets contain hydrogen peroxide and iron ions, which are a source of the powerful oxidising radical OH degrees, particularly under solar irradiation (photo-Fenton reaction). MTBE was chosen for this work because of its current use as an oxygenated additive in gasoline. In this study we found that MTBE is not stable in the atmosphere. More than 15 intermediate products were identified, five of which were quantified (t-butyl formate (TBF), methyl acetate (MA), t-butyl alcohol (TBA), acetone (AC), formaldehyde). The evaluation of the disappearance kinetic of the main intermediate compounds shows the following activity pattern k((TBA))>k((MTBE))>k((TBF)),k>((AC)). Acetone was found to be about 15 times more stable than MTBE in atmospheric conditions. The degradation pathways are discussed on the basis of these identifications and on the degradation of the main intermediate products in similar conditions to MTBE.
journal_name
Chemospherejournal_title
Chemosphereauthors
Guillard C,Charton N,Pichat Pdoi
10.1016/S0045-6535(03)00547-2subject
Has Abstractpub_date
2003-11-01 00:00:00pages
469-77issue
5eissn
0045-6535issn
1879-1298pii
S0045-6535(03)00547-2journal_volume
53pub_type
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