AAAR 31st Annual Conference
October 8-12, 2012
Hyatt Regency Minneapolis
Minneapolis, Minnesota, USA
Abstract View
Characterization of Metal and Ion Concentrations in Rural and Urban PM2.5 and PM10-2.5 in Colorado
Nicholas Clements, JENNY EAV, Allison Moore, Kelly Albano, Jana Milford, Shelly Miller, Michael Hannigan, University of Colorado at Boulder
Abstract Number: 366 Working Group: Urban Aerosols
Abstract The Colorado Coarse Rural-Urban Sources and Health (CCRUSH) study is investigating the health impacts of PM$_(10-2.5) in arid rural and urban environments. To compliment the health study, one year of sixth-day 24-hour samples were collected with a dichotomous medium-flow filter sampler at four locations in Colorado. Two sites are located in urban Denver, CO and are characterized as industrial-residential and urban-residential. One site, Alsup Elementary, is near the intersection of 4 major roadways and adjacent to a gravel pit operations. The other two sites are located 50 km northeast of Denver in Greeley, CO, a rural city near major agricultural operations, including multiple animal feeding operations. These sites are classified as rural-residential. Monthly composite groups of PM$_(2.5) and PM$_(10-2.5) samples collected on Teflon filters were analyzed by ICP-MS for metals, water-soluble metals, and ions. Species concentrations are analyzed spatially for correlations and heterogeneity. Crustal enrichment factors are calculated to assess influence of anthropogenic emissions on the crustal signature of the air. PCA is also used as a tool to identify particulate sources.