AAAR 35th Annual Conference October 17 - October 21, 2016 Oregon Convention Center Portland, Oregon, USA
Abstract View
Source Apportionment of PM2.5 in Baton Rouge, Louisiana
FENGLIN HAN, Hongliang Zhang, Louisiana State University
Abstract Number: 210 Working Group: Source Apportionment
Abstract Fine particulate matter (PM2.5) composition data collected at a monitoring site in central Baton Rouge, Louisiana were analyzed using positive matrix factorization (PMF) version 5. These 24-h averaged mass concentrations and compositions were obtained from samples taken every third or sixth day from 2009 to 2014. Uncertainties were calculated based on reference and missing values were replaced with geometric mean and determined with method detection limit (MDL). Major contributors to PM2.5 including secondary sulfate, secondary nitrate, diesel vehicle, sea salt, road dust and soil were identified. The seasonal variations and annual trends of contribution of each source were also analyzed. Being located in the urban area and adjacent to highways and Mississippi River, the PM2.5 level at this site was a result of both local urban activities and regional transport. This study provides important information for PM2.5 control in Baton Rouge and the results can be used for assessing health risks of exposure to PM2.5.