Composition and sources of organic matter in atmospheric PM10 over a two year period in Beijing, China |
| |
| Authors: | Jiabin Zhou Tieguan Wang Yanping Zhang Ningning Zhong Patricia M Medeiros Bernd RT Simoneit |
| |
| Institution: | aCollege of Natural Resources and Information Technology, China University of Petroleum, Beijing 102249, PR China;bSchool of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China;cEnvironmental Science Graduate Program, Oregon State University, Corvallis, Oregon 97331, USA;dDepartment of Chemistry, Oregon State University, Corvallis, Oregon 97331, USA |
| |
| Abstract: | The solvent-extractable organic compounds of atmospheric PM10 samples, collected over two years beginning in 2003 at urban and suburban sites of Beijing, were characterized using gas chromatography–mass spectrometry (GC–MS). The elemental carbon (EC) contents were determined and ranged from 4.3 to 42 μg m− 3. Organic compounds in total extracts were identified and included unresolved complex mixture (UCM) and series of n-alkanes, n-alkanols, n-alkanoic acids, polycyclic aromatic hydrocarbons (PAHs); saccharides, alkanedioic acids, steroids, and other biomarkers and source tracers. The seasonal variations of their relative abundances are discussed. The abundance order for the major molecular classes in the particulate organic matter (POM) was the following: UCM > saccharides > n-alkanoic acids >n-alkanes > n-alkanols > PAHs > hydroxy-PAHs > other biomarker tracers. Based on the genetic significance of the molecular tracers, the dominant sources of POM are proposed for the two sampling sites. The emissions from fossil fuel use (both coal and petroleum products), biomass combustion, other pyrolysis sources, higher plant wax, and secondary products contribute > 98.0% of the POM mass. The fossil fuel use (average = 65% of POM) is the largest contributor and derives mainly from vehicular traffic. |
| |
| Keywords: | Total extracts Particulate organic matter (POM) Molecular tracers Source apportionment Seasonal trends |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
