| 沈阳工业区夏季VOCs组成特征及其对二次污染形成的贡献 |
| 摘要点击 1565 全文点击 452 投稿时间：2022-06-16 修订日期：2022-09-16 |
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| 中文关键词 沈阳 挥发性有机物 (VOCs) 工业区 臭氧生成潜势 (OFP) 二次有机气溶胶生成潜势 (AFP) |
| 英文关键词 Shenyang volatile organic compounds (VOCs) industrial area ozone formation potential (OFP) aerosol formation potential (AFP) |
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| 中文摘要 |
| 利用2019年和2020年夏季沈阳市工业区大气挥发性有机物（VOCs）的观测数据，研究沈阳市夏季工业区大气VOCs的组成特征并初步判断其来源，并利用最大增量反应活性（MIR）和气溶胶生成系数（FAC）法分别估算该地大气VOCs的臭氧生成潜势（OFP）及二次有机气溶胶生成潜势（AFP）.结果表明，观测期间沈阳市工业区ρ（总VOCs）平均值为41.66 μg ·m-3，烷烃、烯烃、芳香烃和乙炔分别占总VOCs浓度的48.50%、14.08%、15.37%和22.05%.浓度排名前10的物种累计占总VOCs浓度的69.25%，其中大部分为C2~C5的烷烃，还包括乙炔、乙烯和部分芳香烃.总VOCs整体上呈现出早晚浓度高、中午浓度低的日变化特征，峰值分别出现在06：00和22：00，11：00~16：00处于较低水平.由甲苯/苯（T/B）和异戊烷/正戊烷的比值判断工业区主要受机动车尾气排放、溶剂使用、燃烧源和LPG/NG的影响.工业区大气VOCs的总AFP为41.43×10-2 μg ·m-3，其中芳香烃的贡献最大；总OFP贡献值为117.59 μg ·m-3，其中烯烃对OFP的贡献最大. |
| 英文摘要 |
| Based on the observation data of volatile organic compounds (VOCs) in the industrial area of Shenyang during the summer of 2019 and 2020, the composition characteristics and sources of VOCs were preliminarily studied. The ozone formation potential (OFP) and aerosol formation potential (AFP) of VOCs were also estimated using the max incremental reactivity (MIR) and aerosol formation coefficient (FAC) methods, respectively. The results showed that the average concentration of VOCs was 41.66 μg·m-3, and the proportions of alkanes, olefins, aromatics, and acetylene were 48.50%, 14.08%, 15.37%, and 22.05%, respectively. The top ten species of VOCs were primarily C2-C5 alkanes, also including acetylene, ethylene, and some aromatics, accounting for 69.25% of the total VOCs. VOCs showed obvious diurnal variation characteristics with a high concentration in the morning and evening (at 06:00 and 22:00) and a low concentration in the afternoon (11:00-16:00). According to the value of toluene/benzene (T/B) and isopentane/n-pentane, the atmosphere of the industrial area was mainly affected by vehicle exhaust emissions, solvent use, combustion sources, and LPG/NG. The total AFP of VOCs was up to 41.43×10-2 μg·m-3, and aromatics were the largest contributor. The total OFP of VOCs reached 117.59 μg·m-3, in which the alkenes contributed the most. |
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