Typical polar organic aerosol tracers in PM2.5 over the North China Plain: Spatial distribution, seasonal variations, contribution and sources
| Autor: | Lili Wang, Xingru Li, Yusi Liu, Dong Li, Zirui Liu, Guo'an Wang, Yuesi Wang, Rongrong Shen, Yu Bai |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Pinene
Environmental Engineering 010504 meteorology & atmospheric sciences Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health General Medicine General Chemistry 010501 environmental sciences Seasonality medicine.disease Spatial distribution Mass spectrometry 01 natural sciences Pollution Aerosol chemistry.chemical_compound Phthalic acid chemistry Environmental chemistry medicine Environmental Chemistry Mass concentration (chemistry) Environmental science Isoprene 0105 earth and related environmental sciences |
| Zdroj: | Chemosphere. 209:758-766 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2018.06.133 |
| Popis: | PM2.5 samples were collected simultaneously at three urban sites including Beijing (BJ), Tianjin (TJ), Shijiazhuang (SJZ) and one background site Xinglong (XL) from June 2014 till April 2015. Typical polar organic aerosol tracers including 2-methylglyceric acid, 2-methyltetrols, 3-hydroxyglutaric acid, anhydrous saccharides and phthalic acid were analyzed by gas chromatography-mass spectrometry. Both Isoprene secondary organic aerosol (SOA) tracers and pinene SOA tracers had higher mass concentrations at background site than those at urban sites. But they showed different seasonal variations. The former had the highest mass concentration in summer while the latter had the highest mass concentration in spring. Anhydrous saccharides and phthalic acids at urban sites had higher mass concentrations than those at background site and showed higher mass concentration in autumn and winter, respectively. Corresponding estimated secondary organic carbons (SOCs) showed similar variation trends with tracers. In general, biogenic sources had more influence on background site while urban sites were more affected by anthropogenic sources. |
| Databáze: | OpenAIRE |
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