Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2020.105374 |
Insights into the characteristics of aerosols using an integrated single particle–bulk chemical approach | |
Junke Zhang, Xiaojuan Huang, Yangchun Yu, Qin Liu, ... Yuesi Wang | |
2020-11-22 | |
发表期刊 | Atmospheric Research |
出版年 | 2020 |
英文摘要 | Single particle analysis and bulk chemical analysis are two complementary approaches used to study aerosols from different perspectives. Most previously published studies have been based on only one of these two approaches, which has limited our understanding of particle pollution. We therefore integrated the single particle (single particle aerosol mass spectrometer) and bulk chemical (filter sampling) approaches to sample and analyze PM2.5 pollution in Chengdu, a megacity in Southwest China, during the autumn season. Our results showed that there was a strong correlation between the results obtained by the two approaches. Seven major particle types (vehicular emissions, biomass burning, coal combustion, K with sulfate, K with nitrate, K with secondary inorganic species and dust particles) were resolved, corresponding to the different chemical components measured by filter sampling. Two different pollution episodes were identified. Pollution episode 1 was caused by combustion sources (coal and biomass), whereas pollution episode 2 was caused by a combination of local vehicular emissions and regional transport from regions to the east and south of Chengdu. Integrated single particle and bulk chemical analysis can determine the sources and formation mechanisms of pollution more efficiently than either one of these methods used alone. Bivariate polar plots showed that in addition to SO2, local emissions were the dominant source of all species. Regional transport was usually from areas located to the southwest or northeast of Chengdu. Six sources of PM2.5 were apportioned based on positive matrix factorization: Combustion (16.1%), vehicular emissions (26.2%), soil dust (4.5%), industrial processes (12.2%), secondary nitrate (18.9%) and secondary sulfate (22.1%) |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/304237 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Junke Zhang, Xiaojuan Huang, Yangchun Yu, Qin Liu, ... Yuesi Wang. Insights into the characteristics of aerosols using an integrated single particle–bulk chemical approach[J]. Atmospheric Research,2020. |
APA | Junke Zhang, Xiaojuan Huang, Yangchun Yu, Qin Liu, ... Yuesi Wang.(2020).Insights into the characteristics of aerosols using an integrated single particle–bulk chemical approach.Atmospheric Research. |
MLA | Junke Zhang, Xiaojuan Huang, Yangchun Yu, Qin Liu, ... Yuesi Wang."Insights into the characteristics of aerosols using an integrated single particle–bulk chemical approach".Atmospheric Research (2020). |
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