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| DOI | 10.5194/acp-17-2573-2017 |
| Chemical characterization of fine particulate matter in Changzhou, China, and source apportionment with offline aerosol mass spectrometry | |
| Ye Z.; Liu J.; Gu A.; Feng F.; Liu Y.; Bi C.; Xu J.; Li L.; Chen H.; Chen Y.; Dai L.; Zhou Q.; Ge X. | |
| 发表日期 | 2017 |
| ISSN | 16807316 |
| 卷号 | 17期号:4 |
| 英文摘要 | Knowledge of aerosol chemistry in densely populated regions is critical for effective reduction of air pollution, while such studies have not been conducted in Changzhou, an important manufacturing base and populated city in the Yangtze River Delta (YRD), China. This work, for the first time, performed a thorough chemical characterization on the fine particulate matter (PM2.5) samples, collected during July 2015 to April 2016 across four seasons in this city. A suite of analytical techniques was employed to measure the organic carbon (OC), elemental carbon (EC), water-soluble organic carbon (WSOC), water-soluble inorganic ions (WSIIs), trace elements, and polycyclic aromatic hydrocarbons (PAHs) in PM2.5; in particular, an Aerodyne soot particle aerosol mass spectrometer (SP-AMS) was deployed to probe the chemical properties of water-soluble organic aerosol (WSOA). The average PM2.5 concentration was found to be 108.3ĝ€μgĝ€mĝ'3, and all identified species were able to reconstruct ĝ1/4ĝ€80ĝ€% of the PM2.5 mass. The WSIIs occupied about half of the PM2.5 mass (ĝ1/4ĝ€52.1ĝ€%), with SO42ĝ', NO3ĝ', and NH4+ as the major ions. On average, nitrate concentrations dominated over sulfate (mass ratio of 1.21), indicating that traffic emissions were more important than stationary sources. OC and EC correlated well with each other and the highest OCĝ€ĝ•ĝ€EC ratio (5.16) occurred in winter, suggesting complex OC sources likely including both secondary and primary ones. Concentrations of eight trace elements (Mn, Zn, Al, B, Cr, Cu, Fe, Pb) can contribute up to ĝ1/4ĝ€5.0ĝ€% of PM2.5 during winter. PAH concentrations were also high in winter (140.25ĝ€ngĝ€mĝ'3), which were predominated by median/high molecular weight PAHs with five and six rings. The organic matter including both water-soluble and water-insoluble species occupied ĝ1/4ĝ€21.5ĝ€% of the PM2.5 mass. SP-AMS determined that the WSOA had average atomic oxygen-to-carbon (Oĝ€ĝ•ĝ€C), hydrogen-to-carbon (Hĝ€ĝ•ĝ€C), nitrogen-to-carbon (Nĝ€ĝ•ĝ€C), and organic matter-to-organic carbon (OMĝ€ĝ•ĝ€OC) ratios of 0.54, 1.69, 0.11, and 1.99, respectively. Source apportionment of WSOA further identified two secondary OA (SOA) factors (a less oxidized and a more oxidized oxygenated OA) and two primary OA (POA) factors (a nitrogen-enriched hydrocarbon-like traffic OA and a local primary OA likely including species from cooking, coal combustion, etc.). On average, the POA contribution outweighed SOA (55ĝ€% vs. 45ĝ€%), indicating the important role of local anthropogenic emissions in the aerosol pollution in Changzhou. Our measurement also shows the abundance of organic nitrogen species in WSOA, and the source analyses suggest these species are likely associated with traffic emissions, which warrants more investigations on PM samples from other locations. © Author(s) 2017. |
| URL | https://www2.scopus.com/inward/record.uri?eid=2-s2.0-85013399167&doi=10.5194%2facp-17-2573-2017&partnerID=40&md5=2b31d5bb95d01ed676904af3d7b6134c |
| 语种 | 英语 |
| scopus关键词 | aerosol; chemical composition; mass spectrometry; organic carbon; PAH; particulate matter; source apportionment; trace element; Changzhou; China; Jiangsu |
| 来源期刊 | Atmospheric Chemistry and Physics
 |
| 来源机构 | 中国科学院西北生态环境资源研究院 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/77315 |
| 推荐引用方式 GB/T 7714 | Ye Z.； Liu J.； Gu A.； Feng F.； Liu Y.； Bi C.； Xu J.； Li L.； Chen H.； Chen Y.； Dai L.； Zhou Q.； Ge X.. Chemical characterization of fine particulate matter in Changzhou, China, and source apportionment with offline aerosol mass spectrometry[J]. 中国科学院西北生态环境资源研究院,2017,17(4). |
| APA | Ye Z.； Liu J.； Gu A.； Feng F.； Liu Y.； Bi C.； Xu J.； Li L.； Chen H.； Chen Y.； Dai L.； Zhou Q.； Ge X..(2017).Chemical characterization of fine particulate matter in Changzhou, China, and source apportionment with offline aerosol mass spectrometry.Atmospheric Chemistry and Physics,17(4). |
| MLA | Ye Z.； Liu J.； Gu A.； Feng F.； Liu Y.； Bi C.； Xu J.； Li L.； Chen H.； Chen Y.； Dai L.； Zhou Q.； Ge X.."Chemical characterization of fine particulate matter in Changzhou, China, and source apportionment with offline aerosol mass spectrometry".Atmospheric Chemistry and Physics 17.4(2017). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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