Document Detail

Aerosols emitted in underground mine air by diesel engine fueled with biodiesel.
MedLine Citation:
PMID:  20222537     Owner:  NLM     Status:  MEDLINE    
Using biodiesel in place of petroleum diesel is considered by several underground metal and nonmetal mine operators to be a viable strategy for reducing the exposure of miners to diesel particulate matter. This study was conducted in an underground experimental mine to evaluate the effects of soy methyl ester biodiesel on the concentrations and size distributions of diesel aerosols and nitric oxides in mine air. The objective was to compare the effects of neat and blended biodiesel fuels with those of ultralow sulfur petroleum diesel. The evaluation was performed using a mechanically controlled, naturally aspirated diesel engine equipped with a muffler and a diesel oxidation catalyst. The effects of biodiesel fuels on size distributions and number and total aerosol mass concentrations were found to be strongly dependent on engine operating conditions. When fueled with biodiesel fuels, the engine contributed less to elemental carbon concentrations for all engine operating modes and exhaust configurations. The substantial increases in number concentrations and fraction of organic carbon (OC) in total carbon over the baseline were observed when the engine was fueled with biodiesel fuels and operated at light-load operating conditions. Size distributions for all test conditions were found to be single modal and strongly affected by engine operating conditions, fuel type, and exhaust configuration. The peak and total number concentrations as well as median diameter decreased with an increase in the fraction of biodiesel in the fuels, particularly for high-load operating conditions. The effects of the diesel oxidation catalyst, commonly deployed to counteract the potential increase in OC emissions due to use of biodiesel, were found to vary depending upon fuel formulation and engine operating conditions. The catalyst was relatively effective in reducing aerosol number and mass concentrations, particularly at light-load conditions, but also showed the potential for an increase in nitrogen dioxide concentrations at high-load modes.
Aleksandar D Bugarski; Emanuele G Cauda; Samuel J Janisko; Jon A Hummer; Larry D Patts
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the Air & Waste Management Association (1995)     Volume:  60     ISSN:  1096-2247     ISO Abbreviation:  J Air Waste Manag Assoc     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-03-12     Completed Date:  2010-04-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9503111     Medline TA:  J Air Waste Manag Assoc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  237-44     Citation Subset:  IM    
U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, Pittsburgh, PA USA.
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MeSH Terms
Aerosols / analysis*
Air / analysis*
Air Pollutants, Occupational / analysis*
Air Pollution, Indoor / analysis
Biofuels* / analysis,  standards
Carbon / analysis
Nitrogen Oxides / analysis
Occupational Exposure / prevention & control
Particle Size
Particulate Matter
Sulfur / analysis
Vehicle Emissions / analysis*
Reg. No./Substance:
0/Aerosols; 0/Air Pollutants, Occupational; 0/Biofuels; 0/Nitrogen Oxides; 0/Particulate Matter; 0/Vehicle Emissions; 7440-44-0/Carbon; 7704-34-9/Sulfur

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