Document Detail


OH-initiated oxidation of DMS/DMSO: reaction products at high NOx levels.
MedLine Citation:
PMID:  14638301     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Dimethylsulphide (DMS) gas phase oxidation with OH radicals was investigated by long path FT-IR spectroscopy and by ion chromatography (IC) and HPLC-MS2 to quantify the reaction products and evaluate heterogeneous processes. The experiments were performed considering two different NOx (NO2+NO) levels. The initial concentration of NO2 was varied from 24 ppbV (NOx=1 ppmV) to 953 ppbV (NOx=10 ppmV). Photolysis of H2O2 was used as the OH-radical source. SO2, dimethylsulphoxide (DMSO), dimethylsulphone (DMSO2), methanesulphonic acid (MSA), methanesulphinic acid (MSIA) and methane sulphonyl peroxynitrate (MSPN) were identified as the main sulphur-containing products. The results indicate that higher NOx levels play a significant role in the chemistry of CH3S(O)x radical, influencing both the SO2/MSPN ratio and the amount of the sulphur species in the condensed phase, and that the NO2/NO ratio could influence the trends in the molar yields of the different products. For this reason the NOx content results a limiting parameter when on measure DMS in atmospheric environment.
Authors:
Vito Librando; Giuseppe Tringali; Jens Hjorth; Salvatore Coluccia
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  127     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2004  
Date Detail:
Created Date:  2003-11-25     Completed Date:  2004-05-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  403-10     Citation Subset:  IM    
Affiliation:
Chemistry Department of the University of Catania, Viale Andrea Doria, 6, I-95127, Catania, Italy. vlibrando@unict.it
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Aerosols
Air Pollutants / chemistry*
Chromatography, Ion Exchange
Climate
Dimethyl Sulfoxide / chemistry
Environmental Monitoring / methods*
Hydroxyl Radical / chemistry*
Nitric Oxide / chemistry
Nitrogen Dioxide / chemistry
Photochemistry
Spectroscopy, Near-Infrared
Sulfides / chemistry*
Chemical
Reg. No./Substance:
0/Aerosols; 0/Air Pollutants; 0/Sulfides; 10102-43-9/Nitric Oxide; 10102-44-0/Nitrogen Dioxide; 3352-57-6/Hydroxyl Radical; 67-68-5/Dimethyl Sulfoxide; 75-18-3/dimethyl sulfide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Biomineralisation of 1,2,4-trichlorobenzene in soils by an adapted microbial population.
Next Document:  Organochlorine concentrations in diseased vs. healthy gull chicks from the northern Baltic.