Changlin Zhan , Chong Wei , Ziguo Liu , Hongxia Liu , Xuefen Yang , Jingru Zheng , Shan Liu , Jihong Quan , Yong Zhang , Qiyuan Wang , Nan Li , Junji Cao
{"title":"2021 至 2022 年中国中部典型工业城市 PM2.5 化学成分的季节变化趋势和光消散效应","authors":"Changlin Zhan , Chong Wei , Ziguo Liu , Hongxia Liu , Xuefen Yang , Jingru Zheng , Shan Liu , Jihong Quan , Yong Zhang , Qiyuan Wang , Nan Li , Junji Cao","doi":"10.1016/j.atmosenv.2024.120922","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates the concentrations, chemical compositions, and sources of PM<sub>2.5</sub> in Huangshi, China. Daily average PM<sub>2.5</sub> levels ranged from 8.43 to 193.08 μg m<sup>−3</sup>, with an annual mean of 54.13 μg m<sup>−3</sup>, exceeding China's annual secondary standard of 35 μg m<sup>−3</sup>. Seasonal mean concentrations peaked in winter and were lowest in summer. Organic carbon (OC) and elemental carbon (EC) had annual means of 4.89 μg m<sup>−3</sup> and 0.94 μg m<sup>−3</sup>, respectively. Water-soluble inorganic ions (WSIIs) accounted for 52.17% of PM<sub>2.5</sub>, with NO<sub>3</sub><sup>−</sup>, SO<sub>4</sub><sup>2−</sup>, and NH<sub>4</sub><sup>+</sup> being the major components. The NO<sub>3</sub><sup>−</sup>/SO<sub>4</sub><sup>2−</sup> ratio averaged 1.65, indicating a transition from coal combustion to vehicle emissions as the primary pollution source. Chemical mass reconstruction revealed that NH<sub>4</sub>NO<sub>3</sub>, (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>, and organic matter (OM) accounted for 65.3% of PM<sub>2.5</sub> mass. Seasonal variations in light extinction (<em>b</em><sub>ext</sub>) highlighted the impact of secondary inorganic salts on visibility, with an annual average <em>b</em><sub>ext</sub> of 346.30 ± 246.98 Mm<sup>−1</sup>. Airmass clusters and potential source region analysis suggested PM<sub>2.5</sub> and its components were primarily originated from local and nearby regions. These findings underscore the effectiveness of local pollution control measures, changing pollution sources, and the necessity for targeted emission controls to improve air quality and visibility in urban areas.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"341 ","pages":"Article 120922"},"PeriodicalIF":4.2000,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Seasonal trends and light extinction effects of PM2.5 chemical composition from 2021 to 2022 in a typical industrial city of central China\",\"authors\":\"Changlin Zhan , Chong Wei , Ziguo Liu , Hongxia Liu , Xuefen Yang , Jingru Zheng , Shan Liu , Jihong Quan , Yong Zhang , Qiyuan Wang , Nan Li , Junji Cao\",\"doi\":\"10.1016/j.atmosenv.2024.120922\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study investigates the concentrations, chemical compositions, and sources of PM<sub>2.5</sub> in Huangshi, China. Daily average PM<sub>2.5</sub> levels ranged from 8.43 to 193.08 μg m<sup>−3</sup>, with an annual mean of 54.13 μg m<sup>−3</sup>, exceeding China's annual secondary standard of 35 μg m<sup>−3</sup>. Seasonal mean concentrations peaked in winter and were lowest in summer. Organic carbon (OC) and elemental carbon (EC) had annual means of 4.89 μg m<sup>−3</sup> and 0.94 μg m<sup>−3</sup>, respectively. Water-soluble inorganic ions (WSIIs) accounted for 52.17% of PM<sub>2.5</sub>, with NO<sub>3</sub><sup>−</sup>, SO<sub>4</sub><sup>2−</sup>, and NH<sub>4</sub><sup>+</sup> being the major components. The NO<sub>3</sub><sup>−</sup>/SO<sub>4</sub><sup>2−</sup> ratio averaged 1.65, indicating a transition from coal combustion to vehicle emissions as the primary pollution source. Chemical mass reconstruction revealed that NH<sub>4</sub>NO<sub>3</sub>, (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>, and organic matter (OM) accounted for 65.3% of PM<sub>2.5</sub> mass. Seasonal variations in light extinction (<em>b</em><sub>ext</sub>) highlighted the impact of secondary inorganic salts on visibility, with an annual average <em>b</em><sub>ext</sub> of 346.30 ± 246.98 Mm<sup>−1</sup>. Airmass clusters and potential source region analysis suggested PM<sub>2.5</sub> and its components were primarily originated from local and nearby regions. These findings underscore the effectiveness of local pollution control measures, changing pollution sources, and the necessity for targeted emission controls to improve air quality and visibility in urban areas.</div></div>\",\"PeriodicalId\":250,\"journal\":{\"name\":\"Atmospheric Environment\",\"volume\":\"341 \",\"pages\":\"Article 120922\"},\"PeriodicalIF\":4.2000,\"publicationDate\":\"2024-11-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Atmospheric Environment\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1352231024005971\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Atmospheric Environment","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1352231024005971","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Seasonal trends and light extinction effects of PM2.5 chemical composition from 2021 to 2022 in a typical industrial city of central China
This study investigates the concentrations, chemical compositions, and sources of PM2.5 in Huangshi, China. Daily average PM2.5 levels ranged from 8.43 to 193.08 μg m−3, with an annual mean of 54.13 μg m−3, exceeding China's annual secondary standard of 35 μg m−3. Seasonal mean concentrations peaked in winter and were lowest in summer. Organic carbon (OC) and elemental carbon (EC) had annual means of 4.89 μg m−3 and 0.94 μg m−3, respectively. Water-soluble inorganic ions (WSIIs) accounted for 52.17% of PM2.5, with NO3−, SO42−, and NH4+ being the major components. The NO3−/SO42− ratio averaged 1.65, indicating a transition from coal combustion to vehicle emissions as the primary pollution source. Chemical mass reconstruction revealed that NH4NO3, (NH4)2SO4, and organic matter (OM) accounted for 65.3% of PM2.5 mass. Seasonal variations in light extinction (bext) highlighted the impact of secondary inorganic salts on visibility, with an annual average bext of 346.30 ± 246.98 Mm−1. Airmass clusters and potential source region analysis suggested PM2.5 and its components were primarily originated from local and nearby regions. These findings underscore the effectiveness of local pollution control measures, changing pollution sources, and the necessity for targeted emission controls to improve air quality and visibility in urban areas.
期刊介绍：
Atmospheric Environment has an open access mirror journal Atmospheric Environment: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review.
Atmospheric Environment is the international journal for scientists in different disciplines related to atmospheric composition and its impacts. The journal publishes scientific articles with atmospheric relevance of emissions and depositions of gaseous and particulate compounds, chemical processes and physical effects in the atmosphere, as well as impacts of the changing atmospheric composition on human health, air quality, climate change, and ecosystems.
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