Assessment of diesel particulate matter exposure in the workplace: freight terminals.
J Environ Monit
; 10(3): 305-14, 2008 Mar.
Article
em En
| MEDLINE
| ID: mdl-18392272
A large study has been undertaken to assess the exposure to diesel exhaust within diesel trucking terminals. A critical component of this assessment is an analysis of the variation in carbonaceous particulate matter (PM) across trucking terminal locations; consistency in the primary sources can be effectively tracked by analyzing trends in elemental carbon (EC) and organic molecular marker concentrations. Ambient samples were collected at yard, dock and repair shop work stations in 7 terminals in the USA and 1 in Mexico. Concentrations of EC ranged from 0.2 to 12 microg m(-3) among the terminals, which corresponds to the range seen in the concentration of summed hopanes (0.5 to 20.5 ng m(-3)). However, when chemical mass balance (CMB) source apportionment results were presented as percent contribution to organic carbon (OC) concentrations, the contribution of mobile sources to OC are similar among the terminals in different cities. The average mobile source percent contribution to OC was 75.3 +/- 17.1% for truck repair shops, 65.4 +/- 20.4% for the docks and 38.4 +/- 9.5% for the terminal yard samples. A relatively consistent mobile source impact was present at all the terminals only when considering percentage of total OC concentrations, not in terms of absolute concentrations.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Compostos Orgânicos
/
Emissões de Veículos
/
Carbono
/
Exposição por Inalação
/
Poluentes Ocupacionais do Ar
/
Material Particulado
Tipo de estudo:
Etiology_studies
/
Risk_factors_studies
Limite:
Humans
País/Região como assunto:
Mexico
Idioma:
En
Revista:
J Environ Monit
Assunto da revista:
SAUDE AMBIENTAL
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Estados Unidos
País de publicação:
Reino Unido