Sources of Fine Particles in a Rural Midwestern U.S. Area
详细信息 查看全文
- 作者：Eugene Kim ; Philip K. Hopke ; Donna M. Kenski ; and Michael Koerber
- 刊名：Environmental Science & Technology
- 出版年：2005
- 出版时间：July 1, 2005
- 年：2005
- 卷：39
- 期：13
- 页码：4953 - 4960
- 全文大小：706K
- 年卷期：v.39,no.13(July 1, 2005)
- ISSN：1520-5851
文摘
Ambient PM2.5 (particulate matter 
2.5 
m in aerodynamicdiameter) samples collected at a rural monitoring sitein Bondville, IL on every third day using Interagency Monitoringof Protected Visual Environments (IMPROVE) samplerwere analyzed through the application of the positive matrixfactorization (PMF). The particulate carbon fractionswere obtained from the thermal optical reflectance methodthat divides particulate carbon into four organic carbon,pyrolyzed organic carbon (OP), and three elemental carbonfractions. A total of 257 samples collected betweenMarch 2001 and May 2003 analyzed for 35 species wereused and eight sources were identified: summer-highsecondary sulfate aerosol (40%), secondary nitrate aerosol(32%), gasoline vehicle (9%), OP-high secondary sulfateaerosol (7%), selenium-high secondary sulfate aerosol (4%),airborne soil (4%), aged sea salt (2%), and diesel emissions(2%). The compositional profiles for gasoline vehicleand diesel emissions are similar to those estimated inother U.S. areas. Backward trajectories indicate that thehighly elevated airborne soil impacts were likely caused byAsian and Saharan dust storms. Potential sourcecontribution function analyses show the potential sourceareas and pathways of secondary sulfate aerosols, especiallythe regional influences of the biogenic as well asanthropogenic secondary aerosol.
2.5 m in aerodynamicdiameter) samples collected at a rural monitoring sitein Bondville, IL on every third day using Interagency Monitoringof Protected Visual Environments (IMPROVE) samplerwere analyzed through the application of the positive matrixfactorization (PMF). The particulate carbon fractionswere obtained from the thermal optical reflectance methodthat divides particulate carbon into four organic carbon,pyrolyzed organic carbon (OP), and three elemental carbonfractions. A total of 257 samples collected betweenMarch 2001 and May 2003 analyzed for 35 species wereused and eight sources were identified: summer-highsecondary sulfate aerosol (40%), secondary nitrate aerosol(32%), gasoline vehicle (9%), OP-high secondary sulfateaerosol (7%), selenium-high secondary sulfate aerosol (4%),airborne soil (4%), aged sea salt (2%), and diesel emissions(2%). The compositional profiles for gasoline vehicleand diesel emissions are similar to those estimated inother U.S. areas. Backward trajectories indicate that thehighly elevated airborne soil impacts were likely caused byAsian and Saharan dust storms. Potential sourcecontribution function analyses show the potential sourceareas and pathways of secondary sulfate aerosols, especiallythe regional influences of the biogenic as well asanthropogenic secondary aerosol.