نتایج جستجو برای: source apportionment
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Air pollution associated with atmospheric fine particulate matter (PM2.5, i.e., particles with an aerodynamic diameter of 2.5mm or less) is a serious problem in Beijing, China. To provide a better understanding of the sources contributing to PM2.5, 24-h samples were collected at 6-day intervals in January, April, July, and October in 2000 at five locations in the Beijing metropolitan area. Both...
Introduction Conclusions References
Source apportionment of fine organic aerosol in Mexico City during the MILAGRO Experiment 2006 E. A. Stone, D. C. Snyder, R. J. Sheesley, A. P. Sullivan, R. J. Weber, and J. J. Schauer Environmental Chemistry and Technology, University of Wisconsin-Madison, Madison, WI, USA, 53706, USA School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA, 30332, USA Receiv...
Fine particles (PM2.5, i.e., particles with an aerodynamic diameter of ≤2.5μm) were collected from the air in August 2005, August–September 2006, and January– February 2007, in Beijing, China. The chemical compositions of particulate organic matter in the ambient samples were quantified by gas chromatography/mass spectrometry. The dominant compounds identified in summertime were n-alkanoic acid...
Organic aerosols (OA) are universally regarded as an important component of the atmosphere that have far-ranging impacts on climate forcing and human health. Many of these impacts are related to OA molecular characteristics. Despite the acknowledged importance, current uncertainties related to the source apportionment of molecular properties and environmental impacts make it difficult to confid...
BACKGROUND Environmental agencies have to take measures to either reduce discharges and emissions of nitrate or to remediate nitrate-polluted water bodies where the nitrate concentrations exceed threshold values. Isotope data can support the identification of nitrate pollution sources and natural attenuation processes of nitrate. REVIEW This review article gives an overview of the information...
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