![Chemical characterization of outdoor PM"2"."5 and gas-phase compounds in Mira Loma, California [An article from: Atmospheric Environment]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR1GBS.jpg)
Chemical characterization of outdoor PM"2"."5 and gas-phase compounds in Mira Loma, California [An article from: Atmospheric Environment]
Book Details
PublisherElsevier
ISBN / ASINB000RR1GBS
ISBN-13978B000RR1GB9
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Outdoor fine particulate matter (PM"2"."5) and gas-phase compounds were investigated in Mira Loma, a semi-rural community in southern California, between September 2001 and January 2002. Outdoor PM"2"."5 concentrations for the study duration averaged 41.8@mgm^-^3, with nitrate and organic carbon being the major contributors (~26% each). Higher PM"2"."5 concentrations were observed during the first half of the study relative to the second half, corresponding with actinic flux calculations. Gas-phase ammonia concentrations were 6-7 times greater than nitric acid concentrations, while formaldehyde and acetaldehyde concentrations were consistent with Air Resources Board results. Use of a back trajectory model together with PM"2"."5 chemical composition data showed distinct differences in nitrate and trace element concentrations for back trajectories originating from Los Angeles and Orange counties versus those originating from Nevada. Source apportionment using a chemical mass balance model helped demonstrate that the total contribution of secondary aerosol (56%) was greater than the total primary vehicular exhaust contribution to PM"2"."5 by a factor of 5. These results highlight the importance of region-wide secondary sources to the local air quality in this semi-rural area.
Description:
Outdoor fine particulate matter (PM"2"."5) and gas-phase compounds were investigated in Mira Loma, a semi-rural community in southern California, between September 2001 and January 2002. Outdoor PM"2"."5 concentrations for the study duration averaged 41.8@mgm^-^3, with nitrate and organic carbon being the major contributors (~26% each). Higher PM"2"."5 concentrations were observed during the first half of the study relative to the second half, corresponding with actinic flux calculations. Gas-phase ammonia concentrations were 6-7 times greater than nitric acid concentrations, while formaldehyde and acetaldehyde concentrations were consistent with Air Resources Board results. Use of a back trajectory model together with PM"2"."5 chemical composition data showed distinct differences in nitrate and trace element concentrations for back trajectories originating from Los Angeles and Orange counties versus those originating from Nevada. Source apportionment using a chemical mass balance model helped demonstrate that the total contribution of secondary aerosol (56%) was greater than the total primary vehicular exhaust contribution to PM"2"."5 by a factor of 5. These results highlight the importance of region-wide secondary sources to the local air quality in this semi-rural area.
