Seasonal Variations of Carbonyls and Their Contributions to the Ozone Formation in Urban Atmosphere of Taiyuan, China
Ambient carbonyls are critical precursors of ozone (O<sub>3</sub>) and secondary organic aerosols (SOA). To better understand the pollution characteristics of carbonyls in Taiyuan, field samplings were conducted, and 13 carbonyls were detected in an urban site of Taiyuan for the four sea...
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MDPI AG
2021-04-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/12/4/510 |
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| author | Zeqian Liu Yang Cui Qiusheng He Lili Guo Xueying Gao Yanli Feng Yuhang Wang Xinming Wang |
| author_facet | Zeqian Liu Yang Cui Qiusheng He Lili Guo Xueying Gao Yanli Feng Yuhang Wang Xinming Wang |
| author_sort | Zeqian Liu |
| collection | DOAJ |
| description | Ambient carbonyls are critical precursors of ozone (O<sub>3</sub>) and secondary organic aerosols (SOA). To better understand the pollution characteristics of carbonyls in Taiyuan, field samplings were conducted, and 13 carbonyls were detected in an urban site of Taiyuan for the four seasons. The total concentration of carbonyls in the atmosphere was 19.67 ± 8.56 μg/m<sup>3</sup>. Formaldehyde (7.70 ± 4.78 μg/m<sup>3</sup>), acetaldehyde (2.95 ± 1.20 μg/m<sup>3</sup>) and acetone (5.57 ± 2.41 μg/m<sup>3</sup>) were the dominant carbonyl compounds, accounting for more than 85% of the total carbonyls. The highest values for formaldehyde and acetone occurred in summer and autumn, respectively, and the lowest occurred in winter. The variations for acetaldehyde were not distinct in the four seasons. Formaldehyde and acetone levels increased obviously in the daytime and decreased at night, while acetaldehyde did not show significant diurnal variations. Higher temperature and stronger sunlight intensity could facilitate the photochemical reaction of volatile organic compounds (VOCs) and enhance the O<sub>3</sub> levels in summer. Formaldehyde and acetaldehyde contributed 70–95% of carbonyls’ ozone formation potential (OFP) caused by carbonyls with the highest totals of 268.62 μg/m<sup>3</sup> and 38.14 μg/m<sup>3</sup>, respectively. The highest concentrations of carbonyls from south and southwest winds in summer suggest that the coke industries in the southern Taiyuan Basin should be, firstly, controlled for the alleviation of ozone pollution. |
| first_indexed | 2024-03-10T12:14:16Z |
| format | Article |
| id | doaj.art-3a448d24467c41408641d8441b39d6bd |
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| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T12:14:16Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
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| series | Atmosphere |
| spelling | doaj.art-3a448d24467c41408641d8441b39d6bd2023-11-21T15:59:16ZengMDPI AGAtmosphere2073-44332021-04-0112451010.3390/atmos12040510Seasonal Variations of Carbonyls and Their Contributions to the Ozone Formation in Urban Atmosphere of Taiyuan, ChinaZeqian Liu0Yang Cui1Qiusheng He2Lili Guo3Xueying Gao4Yanli Feng5Yuhang Wang6Xinming Wang7School of Environment and Safety, Taiyuan University of Science and Technology, No. 66 Waliu Road Wanbailin District, Taiyuan 030024, ChinaSchool of Environment and Safety, Taiyuan University of Science and Technology, No. 66 Waliu Road Wanbailin District, Taiyuan 030024, ChinaSchool of Environment and Safety, Taiyuan University of Science and Technology, No. 66 Waliu Road Wanbailin District, Taiyuan 030024, ChinaSchool of Environment and Safety, Taiyuan University of Science and Technology, No. 66 Waliu Road Wanbailin District, Taiyuan 030024, ChinaSchool of Environment and Safety, Taiyuan University of Science and Technology, No. 66 Waliu Road Wanbailin District, Taiyuan 030024, ChinaSchool of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, ChinaSchool of Earth and Atmospheric Science, Georgia Institute of Technology, Atlanta, GA 30332, USAState Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, ChinaAmbient carbonyls are critical precursors of ozone (O<sub>3</sub>) and secondary organic aerosols (SOA). To better understand the pollution characteristics of carbonyls in Taiyuan, field samplings were conducted, and 13 carbonyls were detected in an urban site of Taiyuan for the four seasons. The total concentration of carbonyls in the atmosphere was 19.67 ± 8.56 μg/m<sup>3</sup>. Formaldehyde (7.70 ± 4.78 μg/m<sup>3</sup>), acetaldehyde (2.95 ± 1.20 μg/m<sup>3</sup>) and acetone (5.57 ± 2.41 μg/m<sup>3</sup>) were the dominant carbonyl compounds, accounting for more than 85% of the total carbonyls. The highest values for formaldehyde and acetone occurred in summer and autumn, respectively, and the lowest occurred in winter. The variations for acetaldehyde were not distinct in the four seasons. Formaldehyde and acetone levels increased obviously in the daytime and decreased at night, while acetaldehyde did not show significant diurnal variations. Higher temperature and stronger sunlight intensity could facilitate the photochemical reaction of volatile organic compounds (VOCs) and enhance the O<sub>3</sub> levels in summer. Formaldehyde and acetaldehyde contributed 70–95% of carbonyls’ ozone formation potential (OFP) caused by carbonyls with the highest totals of 268.62 μg/m<sup>3</sup> and 38.14 μg/m<sup>3</sup>, respectively. The highest concentrations of carbonyls from south and southwest winds in summer suggest that the coke industries in the southern Taiyuan Basin should be, firstly, controlled for the alleviation of ozone pollution.https://www.mdpi.com/2073-4433/12/4/510carbonylsseasonal variationdiurnal variationphotochemical reactioncoking emission |
| spellingShingle | Zeqian Liu Yang Cui Qiusheng He Lili Guo Xueying Gao Yanli Feng Yuhang Wang Xinming Wang Seasonal Variations of Carbonyls and Their Contributions to the Ozone Formation in Urban Atmosphere of Taiyuan, China Atmosphere carbonyls seasonal variation diurnal variation photochemical reaction coking emission |
| title | Seasonal Variations of Carbonyls and Their Contributions to the Ozone Formation in Urban Atmosphere of Taiyuan, China |
| title_full | Seasonal Variations of Carbonyls and Their Contributions to the Ozone Formation in Urban Atmosphere of Taiyuan, China |
| title_fullStr | Seasonal Variations of Carbonyls and Their Contributions to the Ozone Formation in Urban Atmosphere of Taiyuan, China |
| title_full_unstemmed | Seasonal Variations of Carbonyls and Their Contributions to the Ozone Formation in Urban Atmosphere of Taiyuan, China |
| title_short | Seasonal Variations of Carbonyls and Their Contributions to the Ozone Formation in Urban Atmosphere of Taiyuan, China |
| title_sort | seasonal variations of carbonyls and their contributions to the ozone formation in urban atmosphere of taiyuan china |
| topic | carbonyls seasonal variation diurnal variation photochemical reaction coking emission |
| url | https://www.mdpi.com/2073-4433/12/4/510 |
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