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Aerosols chemical composition, light extinction, and source apportionment near a desert margin city, Yulin, China

Daily PM(10)and PM(2.5) sampling was conducted during four seasons from December 2013 to October 2014 at three monitoring sites over Yulin, a desert margin city. PM(10) and PM(2.5) levels, water soluble ions, organic carbon (OC), and elemental carbon (EC) were also analyzed to characterize their che...

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Autores principales: Lei, Yali, Shen, Zhenxing, Tang, Zhuoyue, Zhang, Qian, Sun, Jian, Ma, Yongjing, Wu, Xiaoyan, Qin, Yiming, Xu, Hongmei, Zhang, Renjian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7025702/
https://www.ncbi.nlm.nih.gov/pubmed/32095332
http://dx.doi.org/10.7717/peerj.8447
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author Lei, Yali
Shen, Zhenxing
Tang, Zhuoyue
Zhang, Qian
Sun, Jian
Ma, Yongjing
Wu, Xiaoyan
Qin, Yiming
Xu, Hongmei
Zhang, Renjian
author_facet Lei, Yali
Shen, Zhenxing
Tang, Zhuoyue
Zhang, Qian
Sun, Jian
Ma, Yongjing
Wu, Xiaoyan
Qin, Yiming
Xu, Hongmei
Zhang, Renjian
author_sort Lei, Yali
collection PubMed
description Daily PM(10)and PM(2.5) sampling was conducted during four seasons from December 2013 to October 2014 at three monitoring sites over Yulin, a desert margin city. PM(10) and PM(2.5) levels, water soluble ions, organic carbon (OC), and elemental carbon (EC) were also analyzed to characterize their chemical profiles. b(ext) (light extinction coefficient) was calculated, which showed the highest in winter with an average of 232.95 ± 154.88 Mm(−1), followed by autumn, summer, spring. Light extinction source apportionment results investigated (NH(4))(2)SO(4) and NH(4)NO(3) played key roles in the light extinction under high RH conditions during summer and winter. Sulfate, nitrate and Ca(2 +) dominated in PM(10)/PM(2.5) ions. Ion balance results illustrated that PM samples were alkaline, and PM(10) samples were more alkaline than PM(2.5). High SO(4)(2−)/K(+) and Cl(−)/K(+) ratio indicated the important contribution of coal combustion, which was consistent with the OC/EC regression equation intercepts results. Principal component analysis (PCA) analyses results showed that the fugitive dust was the most major source of PM, followed by coal combustion & gasoline vehicle emissions, secondary formation and diesel vehicle emissions. Potential contribution source function (PSCF) results suggested that local emissions, as well as certain regional transport from northwesterly and southerly areas contributed to PM(2.5) loadings during the whole year. Local government should take some measures to reduce the PM levels.
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spelling pubmed-70257022020-02-24 Aerosols chemical composition, light extinction, and source apportionment near a desert margin city, Yulin, China Lei, Yali Shen, Zhenxing Tang, Zhuoyue Zhang, Qian Sun, Jian Ma, Yongjing Wu, Xiaoyan Qin, Yiming Xu, Hongmei Zhang, Renjian PeerJ Atmospheric Chemistry Daily PM(10)and PM(2.5) sampling was conducted during four seasons from December 2013 to October 2014 at three monitoring sites over Yulin, a desert margin city. PM(10) and PM(2.5) levels, water soluble ions, organic carbon (OC), and elemental carbon (EC) were also analyzed to characterize their chemical profiles. b(ext) (light extinction coefficient) was calculated, which showed the highest in winter with an average of 232.95 ± 154.88 Mm(−1), followed by autumn, summer, spring. Light extinction source apportionment results investigated (NH(4))(2)SO(4) and NH(4)NO(3) played key roles in the light extinction under high RH conditions during summer and winter. Sulfate, nitrate and Ca(2 +) dominated in PM(10)/PM(2.5) ions. Ion balance results illustrated that PM samples were alkaline, and PM(10) samples were more alkaline than PM(2.5). High SO(4)(2−)/K(+) and Cl(−)/K(+) ratio indicated the important contribution of coal combustion, which was consistent with the OC/EC regression equation intercepts results. Principal component analysis (PCA) analyses results showed that the fugitive dust was the most major source of PM, followed by coal combustion & gasoline vehicle emissions, secondary formation and diesel vehicle emissions. Potential contribution source function (PSCF) results suggested that local emissions, as well as certain regional transport from northwesterly and southerly areas contributed to PM(2.5) loadings during the whole year. Local government should take some measures to reduce the PM levels. PeerJ Inc. 2020-02-14 /pmc/articles/PMC7025702/ /pubmed/32095332 http://dx.doi.org/10.7717/peerj.8447 Text en ©2020 Lei et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Atmospheric Chemistry
Lei, Yali
Shen, Zhenxing
Tang, Zhuoyue
Zhang, Qian
Sun, Jian
Ma, Yongjing
Wu, Xiaoyan
Qin, Yiming
Xu, Hongmei
Zhang, Renjian
Aerosols chemical composition, light extinction, and source apportionment near a desert margin city, Yulin, China
title Aerosols chemical composition, light extinction, and source apportionment near a desert margin city, Yulin, China
title_full Aerosols chemical composition, light extinction, and source apportionment near a desert margin city, Yulin, China
title_fullStr Aerosols chemical composition, light extinction, and source apportionment near a desert margin city, Yulin, China
title_full_unstemmed Aerosols chemical composition, light extinction, and source apportionment near a desert margin city, Yulin, China
title_short Aerosols chemical composition, light extinction, and source apportionment near a desert margin city, Yulin, China
title_sort aerosols chemical composition, light extinction, and source apportionment near a desert margin city, yulin, china
topic Atmospheric Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7025702/
https://www.ncbi.nlm.nih.gov/pubmed/32095332
http://dx.doi.org/10.7717/peerj.8447
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