Dust-Dominated Coarse Particles as a Medium for Rapid Secondary Organic and Inorganic Aerosol Formation in Highly Polluted Air
Secondary aerosol (SA) frequently drives severe haze formation on the North China Plain. However, previous studies mostly focused on submicron SA formation, thus our understanding of SA formation on supermicron particles remains poor. In this study, PM2.5 chemical composition and PM10 number size di...
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| Veröffentlicht in: | Environmental science & technology 2020-12, Vol.54 (24), p.15710-15721 |
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| creator | Xu, Wanyun Kuang, Ye Liang, Linlin He, Yao Cheng, Hongbing Bian, Yuxuan Tao, Jiangchuan Zhang, Gen Zhao, Pusheng Ma, Nan Zhao, Huarong Zhou, Guangsheng Su, Hang Cheng, Yafang Xu, Xiaobin Shao, Min Sun, Yele |
| description | Secondary aerosol (SA) frequently drives severe haze formation on the North China Plain. However, previous studies mostly focused on submicron SA formation, thus our understanding of SA formation on supermicron particles remains poor. In this study, PM2.5 chemical composition and PM10 number size distribution measurements revealed that the SA formation occurred in very distinct size ranges. In particular, SA formation on dust-dominated supermicron particles was surprisingly high and increased with relative humidity (RH). SA formed on supermicron aerosols reached comparable levels with that on submicron particles during evolutionary stages of haze episodes. These results suggested that dust particles served as a medium for rapid secondary organic and inorganic aerosol formation under favorable photochemical and RH conditions in a highly polluted environment. Further analysis indicated that SA formation pathways differed among distinct size ranges. Overall, our study highlights the importance of dust in SA formation during non-dust storm periods and the urgent need to perform size-resolved aerosol chemical and physical property measurements in future SA formation investigations that are extended to the coarse mode because the large amount of SA formed thereon might have significant impacts on ice nucleation, radiative forcing, and human health. |
| doi_str_mv | 10.1021/acs.est.0c07243 |
| format | Article |
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However, previous studies mostly focused on submicron SA formation, thus our understanding of SA formation on supermicron particles remains poor. In this study, PM2.5 chemical composition and PM10 number size distribution measurements revealed that the SA formation occurred in very distinct size ranges. In particular, SA formation on dust-dominated supermicron particles was surprisingly high and increased with relative humidity (RH). SA formed on supermicron aerosols reached comparable levels with that on submicron particles during evolutionary stages of haze episodes. These results suggested that dust particles served as a medium for rapid secondary organic and inorganic aerosol formation under favorable photochemical and RH conditions in a highly polluted environment. Further analysis indicated that SA formation pathways differed among distinct size ranges. Overall, our study highlights the importance of dust in SA formation during non-dust storm periods and the urgent need to perform size-resolved aerosol chemical and physical property measurements in future SA formation investigations that are extended to the coarse mode because the large amount of SA formed thereon might have significant impacts on ice nucleation, radiative forcing, and human health.</description><identifier>ISSN: 0013-936X</identifier><identifier>EISSN: 1520-5851</identifier><identifier>DOI: 10.1021/acs.est.0c07243</identifier><identifier>PMID: 33237756</identifier><language>eng</language><publisher>United States: American Chemical Society</publisher><subject>Aerosols ; Aerosols - analysis ; Air Pollutants - analysis ; Air pollution ; Anthropogenic Impacts on the Atmosphere ; Chemical composition ; China ; Dust ; Dust - analysis ; Dust storms ; Environmental Monitoring ; Haze ; Humans ; Ice nucleation ; Nucleation ; Particle Size ; Particle size distribution ; Particulate matter ; Particulate Matter - analysis ; Photochemicals ; Radiative forcing ; Relative humidity ; Seasons ; Size distribution</subject><ispartof>Environmental science & technology, 2020-12, Vol.54 (24), p.15710-15721</ispartof><rights>2020 American Chemical Society</rights><rights>Copyright American Chemical Society Dec 15, 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a361t-ca33cb1a31ed76c53f5d59c18cb31eb2921e18fd4d4e507ef5ca5a8ad1c3354d3</citedby><cites>FETCH-LOGICAL-a361t-ca33cb1a31ed76c53f5d59c18cb31eb2921e18fd4d4e507ef5ca5a8ad1c3354d3</cites><orcidid>0000-0003-4787-1754 ; 0000-0003-4912-9879 ; 0000-0002-0782-8877 ; 0000-0003-2354-0221 ; 0000-0003-4889-1669 ; 0000-0003-1323-2460</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/acs.est.0c07243$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/acs.est.0c07243$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,780,784,2764,27075,27923,27924,56737,56787</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33237756$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Xu, Wanyun</creatorcontrib><creatorcontrib>Kuang, Ye</creatorcontrib><creatorcontrib>Liang, Linlin</creatorcontrib><creatorcontrib>He, Yao</creatorcontrib><creatorcontrib>Cheng, Hongbing</creatorcontrib><creatorcontrib>Bian, Yuxuan</creatorcontrib><creatorcontrib>Tao, Jiangchuan</creatorcontrib><creatorcontrib>Zhang, Gen</creatorcontrib><creatorcontrib>Zhao, Pusheng</creatorcontrib><creatorcontrib>Ma, Nan</creatorcontrib><creatorcontrib>Zhao, Huarong</creatorcontrib><creatorcontrib>Zhou, Guangsheng</creatorcontrib><creatorcontrib>Su, Hang</creatorcontrib><creatorcontrib>Cheng, Yafang</creatorcontrib><creatorcontrib>Xu, Xiaobin</creatorcontrib><creatorcontrib>Shao, Min</creatorcontrib><creatorcontrib>Sun, Yele</creatorcontrib><title>Dust-Dominated Coarse Particles as a Medium for Rapid Secondary Organic and Inorganic Aerosol Formation in Highly Polluted Air</title><title>Environmental science & technology</title><addtitle>Environ. Sci. Technol</addtitle><description>Secondary aerosol (SA) frequently drives severe haze formation on the North China Plain. However, previous studies mostly focused on submicron SA formation, thus our understanding of SA formation on supermicron particles remains poor. In this study, PM2.5 chemical composition and PM10 number size distribution measurements revealed that the SA formation occurred in very distinct size ranges. In particular, SA formation on dust-dominated supermicron particles was surprisingly high and increased with relative humidity (RH). SA formed on supermicron aerosols reached comparable levels with that on submicron particles during evolutionary stages of haze episodes. These results suggested that dust particles served as a medium for rapid secondary organic and inorganic aerosol formation under favorable photochemical and RH conditions in a highly polluted environment. Further analysis indicated that SA formation pathways differed among distinct size ranges. 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Sci. Technol</addtitle><date>2020-12-15</date><risdate>2020</risdate><volume>54</volume><issue>24</issue><spage>15710</spage><epage>15721</epage><pages>15710-15721</pages><issn>0013-936X</issn><eissn>1520-5851</eissn><abstract>Secondary aerosol (SA) frequently drives severe haze formation on the North China Plain. However, previous studies mostly focused on submicron SA formation, thus our understanding of SA formation on supermicron particles remains poor. In this study, PM2.5 chemical composition and PM10 number size distribution measurements revealed that the SA formation occurred in very distinct size ranges. In particular, SA formation on dust-dominated supermicron particles was surprisingly high and increased with relative humidity (RH). SA formed on supermicron aerosols reached comparable levels with that on submicron particles during evolutionary stages of haze episodes. These results suggested that dust particles served as a medium for rapid secondary organic and inorganic aerosol formation under favorable photochemical and RH conditions in a highly polluted environment. Further analysis indicated that SA formation pathways differed among distinct size ranges. Overall, our study highlights the importance of dust in SA formation during non-dust storm periods and the urgent need to perform size-resolved aerosol chemical and physical property measurements in future SA formation investigations that are extended to the coarse mode because the large amount of SA formed thereon might have significant impacts on ice nucleation, radiative forcing, and human health.</abstract><cop>United States</cop><pub>American Chemical Society</pub><pmid>33237756</pmid><doi>10.1021/acs.est.0c07243</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0003-4787-1754</orcidid><orcidid>https://orcid.org/0000-0003-4912-9879</orcidid><orcidid>https://orcid.org/0000-0002-0782-8877</orcidid><orcidid>https://orcid.org/0000-0003-2354-0221</orcidid><orcidid>https://orcid.org/0000-0003-4889-1669</orcidid><orcidid>https://orcid.org/0000-0003-1323-2460</orcidid></addata></record> |
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| subjects | Aerosols Aerosols - analysis Air Pollutants - analysis Air pollution Anthropogenic Impacts on the Atmosphere Chemical composition China Dust Dust - analysis Dust storms Environmental Monitoring Haze Humans Ice nucleation Nucleation Particle Size Particle size distribution Particulate matter Particulate Matter - analysis Photochemicals Radiative forcing Relative humidity Seasons Size distribution |
| title | Dust-Dominated Coarse Particles as a Medium for Rapid Secondary Organic and Inorganic Aerosol Formation in Highly Polluted Air |
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