韩国某典型工业城市挥发性有机物对PM2.5浓度的敏感性分析

IF 1.1 Q4 METEOROLOGY & ATMOSPHERIC SCIENCES Asian Journal of Atmospheric Environment Pub Date : 2023-04-25 DOI:10.1007/s44273-023-00003-y

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

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引用次数: 0

摘要

本研究旨在分析韩国代表性工业城市蔚山的挥发性有机化合物（VOCs）对环境细颗粒物（PM2.5）浓度的敏感性。为了计算挥发性有机化合物与 PM2.5 之间的敏感系数（SVOCs-PM2.5），我们从空气质量监测站获得了 PM2.5 数据，并在岭南密集空气监测站测量了相应的挥发性有机化合物（烷烃、烯烃、芳烃和总挥发性有机化合物）的 6 小时平均浓度。空气监测期分为暖热季（2020 年 5 月至 10 月）和寒冷季（2020 年 11 月至 2021 年 1 月）。PM2.5 低污染期（5 <；PM2.5 ≤ 15 μg/m3）的灵敏度系数分别高于和远高于中污染期（15 <；PM2.5 ≤ 35 μg/m3）和高污染期（35 <；PM2.5 ≤ 50 μg/m3）的灵敏度系数。这一结果表明，在PM2.5高污染期，挥发性有机物（尤其是烯类）每单位浓度变化所产生的PM2.5浓度与本底（PM2.5≤5 μg/m3）的变化比远远高于低污染期。这也表明，PM2.5 浓度高于 35 μg/m3 时比低于 15 μg/m3 时更容易受到挥发性有机物（尤其是烯）单位浓度变化的影响。与暖热季相比，除烯-PM2.5 的敏感性降低了 7% 外，寒冷季节的平均敏感性系数增加了 23%-125%。这说明在寒冷季节，挥发性有机化合物（烯烃除外）对 PM2.5 浓度的影响相对较低。然而，在寒冷季节，烯类可能对 PM2.5 的形成有更大的贡献，特别是在 PM2.5 > 35 μg/m3 的高污染时段，而不是其他挥发性有机化合物组。这项研究的结果可作为挥发性有机化合物排放量大的工业城市制定 PM2.5 管理计划的依据。

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Sensitivity analysis of volatile organic compounds to PM2.5 concentrations in a representative industrial city of Korea

This study aims to analyze the sensitivity of volatile organic compounds (VOCs) to ambient concentrations of fine particles (PM_2.5) in the representative industrial city of Ulsan, Korea. For the calculation of sensitivity coefficients between VOCs and PM_2.5 (SVOCs-PM_2.5), PM_2.5 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 PM_2.5 (5 < PM_2.5 ≤ 15 μg/m³) were higher and much higher than those in the medium pollution period (15 < PM_2.5 ≤ 35 μg/m³) and high pollution period (35 < PM_2.5 ≤ 50 μg/m³), respectively. This result indicates that the change ratios of PM_2.5 concentrations to the background (PM_2.5 ≤ 5 μg/m³) per unit concentration change of VOCs (particularly alkenes) in the high PM_2.5 pollution period were much higher than those in the low pollution period. This also indicates that PM_2.5 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-PM_2.5 sensitivity with a decrease of 7%. It means that the impact of VOCs (except alkenes) on PM_2.5 concentrations was relatively low in the cold season. However, in the cold season, the alkenes might contribute more to PM_2.5 formation, particularly over the high pollution period, having PM_2.5 > 35 μg/m³, than other VOC groups. The result of this study can be a basis for establishing PM_2.5 management plans in industrial cities with large VOC emissions.