Byeong-Kyu Lee, Sung-Deuk Choi, Byeorie Shin, Seong-Joon Kim, Sang-Jin Lee, Dai-Gon Kim, Greem Lee, Hyun-Jung Kang, Hyo-Seon Kim, Dae-Young Park
{"title":"Sensitivity analysis of volatile organic compounds to PM2.5 concentrations in a representative industrial city of Korea","authors":"Byeong-Kyu Lee, Sung-Deuk Choi, Byeorie Shin, Seong-Joon Kim, Sang-Jin Lee, Dai-Gon Kim, Greem Lee, Hyun-Jung Kang, Hyo-Seon Kim, Dae-Young Park","doi":"10.1007/s44273-023-00003-y","DOIUrl":null,"url":null,"abstract":"<div><p>This study aims to analyze the sensitivity of volatile organic compounds (VOCs) to ambient concentrations of fine particles (PM<sub>2.5</sub>) in the representative industrial city of Ulsan, Korea. For the calculation of sensitivity coefficients between VOCs and PM<sub>2.5</sub> (SVOCs-PM<sub>2.5</sub>), PM<sub>2.5</sub> data were obtained from an air quality monitoring station, and their corresponding 6-h average concentrations of VOCs (alkanes, alkenes, aromatics, and total VOCs) were measured at the Yeongnam intensive air monitoring station. The air monitoring period was divided into the warm-hot season (May–October 2020) and the cold season (November 2020–January 2021). The sensitivity coefficients in the low pollution period of PM<sub>2.5</sub> (5 < PM<sub>2.5</sub> ≤ 15 μg/m<sup>3</sup>) were higher and much higher than those in the medium pollution period (15 < PM<sub>2.5</sub> ≤ 35 μg/m<sup>3</sup>) and high pollution period (35 < PM<sub>2.5</sub> ≤ 50 μg/m<sup>3</sup>), respectively. This result indicates that the change ratios of PM<sub>2.5</sub> concentrations to the background (PM<sub>2.5</sub> ≤ 5 μg/m<sup>3</sup>) per unit concentration change of VOCs (particularly alkenes) in the high PM<sub>2.5</sub> pollution period were much higher than those in the low pollution period. This also indicates that PM<sub>2.5</sub> concentrations above 35 μg/m<sup>3</sup> were more easily affected by the unit concentration change of VOCs (particularly alkenes) than those below 15 μg/m<sup>3</sup>. The average sensitivity coefficients during the cold season increased in a range of 23–125% as compared to those during the warm-hot season, except the alkenes-PM<sub>2.5</sub> sensitivity with a decrease of 7%. It means that the impact of VOCs (except alkenes) on PM<sub>2.5</sub> concentrations was relatively low in the cold season. However, in the cold season, the alkenes might contribute more to PM<sub>2.5</sub> formation, particularly over the high pollution period, having PM<sub>2.5</sub> > 35 μg/m<sup>3</sup>, than other VOC groups. The result of this study can be a basis for establishing PM<sub>2.5</sub> management plans in industrial cities with large VOC emissions.</p></div>","PeriodicalId":45358,"journal":{"name":"Asian Journal of Atmospheric Environment","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44273-023-00003-y.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Asian Journal of Atmospheric Environment","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1007/s44273-023-00003-y","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"METEOROLOGY & ATMOSPHERIC SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
This study aims to analyze the sensitivity of volatile organic compounds (VOCs) to ambient concentrations of fine particles (PM2.5) in the representative industrial city of Ulsan, Korea. For the calculation of sensitivity coefficients between VOCs and PM2.5 (SVOCs-PM2.5), PM2.5 data were obtained from an air quality monitoring station, and their corresponding 6-h average concentrations of VOCs (alkanes, alkenes, aromatics, and total VOCs) were measured at the Yeongnam intensive air monitoring station. The air monitoring period was divided into the warm-hot season (May–October 2020) and the cold season (November 2020–January 2021). The sensitivity coefficients in the low pollution period of PM2.5 (5 < PM2.5 ≤ 15 μg/m3) were higher and much higher than those in the medium pollution period (15 < PM2.5 ≤ 35 μg/m3) and high pollution period (35 < PM2.5 ≤ 50 μg/m3), respectively. This result indicates that the change ratios of PM2.5 concentrations to the background (PM2.5 ≤ 5 μg/m3) per unit concentration change of VOCs (particularly alkenes) in the high PM2.5 pollution period were much higher than those in the low pollution period. This also indicates that PM2.5 concentrations above 35 μg/m3 were more easily affected by the unit concentration change of VOCs (particularly alkenes) than those below 15 μg/m3. The average sensitivity coefficients during the cold season increased in a range of 23–125% as compared to those during the warm-hot season, except the alkenes-PM2.5 sensitivity with a decrease of 7%. It means that the impact of VOCs (except alkenes) on PM2.5 concentrations was relatively low in the cold season. However, in the cold season, the alkenes might contribute more to PM2.5 formation, particularly over the high pollution period, having PM2.5 > 35 μg/m3, than other VOC groups. The result of this study can be a basis for establishing PM2.5 management plans in industrial cities with large VOC emissions.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
