Document Detail


Manganese concentrations in the air of the Montreal (Canada) subway in relation to surface automobile traffic density.
MedLine Citation:
PMID:  16297437     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Methylcyclopentadienyl manganese tricarbonyl (MMT) is an organic derivative of manganese (Mn), used since 1976 in Canadian gasoline as an octane enhancer. Its combustion leads to the emission of Mn particles. Several studies carried out by our research group have established a correlation between atmospheric Mn concentrations and automobile traffic density, suggesting that MMT in gasoline could play a significant role. This study aims to measure Mn concentrations in the air of the underground subway in Montreal (Canada) and to examine the relation with nearby surface automobile traffic density and, by extension, with the use of MMT in gasoline. Three subway stations were chosen for their location in different microenvironments with different traffic densities. Respirable (MnR<5 microm) and total Mn (MnT) were sampled over two weeks, 5 days/week, 12 h/day. For the station located in the lower traffic density area, relatively low levels of MnR and MnT were found, with averages of 0.018 and 0.032 microg/m(3), respectively. These concentrations are within the range of the background levels in Montreal. For the other two stations, the average concentrations of MnR were twice as high and exceeded the US EPA reference concentration of 0.05 microg/m(3). Although there may be several sources of Mn from different components of the subway structure and vehicles, no correlation was found between subway traffic and atmospheric Mn in the subway. Since the air in the underground subway is pumped directly from outside without filtration, our findings strongly suggest that the combustion of MMT in automobiles is an important factor.
Authors:
Nacéra Boudia; Renée Halley; Greg Kennedy; Jean Lambert; Lise Gareau; Joseph Zayed
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Publication Detail:
Type:  Journal Article     Date:  2005-11-16
Journal Detail:
Title:  The Science of the total environment     Volume:  366     ISSN:  0048-9697     ISO Abbreviation:  Sci. Total Environ.     Publication Date:  2006 Jul 
Date Detail:
Created Date:  2006-07-17     Completed Date:  2006-09-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  143-7     Citation Subset:  IM    
Affiliation:
GRIS (Interdisciplinary Health Research Group), University of Montreal, Canada.
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MeSH Terms
Descriptor/Qualifier:
Air Pollutants / analysis*
Canada
Cities
Environmental Exposure / analysis*
Environmental Monitoring
Gasoline
Manganese / analysis*
Organometallic Compounds / analysis
Particle Size
Railroads*
Risk Assessment
Time Factors
Vehicle Emissions / analysis*
Chemical
Reg. No./Substance:
0/Air Pollutants; 0/Gasoline; 0/Organometallic Compounds; 0/Vehicle Emissions; 12108-13-3/2-methylcyclopentadienyl manganese tricarbonyl; 7439-96-5/Manganese

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


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