| 摘要: |
| 于2021年夏、秋季利用单光子电离飞行时间质谱仪（SPI-MS）在珠海市金湾环境空气自动站（以下简称“金湾站”）周边开展挥发性有机物（VOCs）走航观测。结果表明，金湾站周边大气中总VOCs（以TVOC表示）质量浓度为11.7～203μg/m3（5%～95%分位值浓度），平均值为104μg/m3。烷烃在VOCs组成中占比最高（39.7%），其次为芳香烃（30%）和含氧含氮烃（13.9%）。2021年秋季（9—11月）为ρ（TVOC）的主要高值时段，且在10—11月，芳香烃和含氧含氮烃对TVOC的贡献显著升高。臭氧（O3）生成贡献分析结果表明，烷烃和芳香烃对O3生成的贡献最高，二甲苯、乙苯、三甲苯、甲苯、戊烷/异戊烷是珠海市O3污染防治的优控VOCs物种，其对O3生成的贡献高达56.0%。其中，戊烷/异戊烷主要来自金湾站周边的电子专用材料制造企业，二甲苯/乙苯主要来自周边的电线、电缆制造，橡胶、塑料制品生产企业。 |
| 关键词: 挥发性有机物 单光子电离飞行时间质谱仪 走航监测 污染特征 珠海市 |
| DOI：10.3969/j.issn.1674-6732.2023.05.021 |
| 分类号:X511 |
| 基金项目:广东省重点领域研发计划项目（2020B111136001） |
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| Characteristics of VOCs Using Cruise Monitoring in Jinwan District of Zhuhai in Summer and Autumn |
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ZHAO Yan，WANG Qing，MAI Zhiyuan，ZENG Xiancong，LIN Zhihua*
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Ecological and Environmental Monitoring Center of Western Zhuhai， Zhuhai， Guangdong 519040， China
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| Abstract: |
| The single photon ionization time of flight mass spectrometry（SPI-MS） was used to monitor VOCs around the Jinwan air quality monitoring station of Zhuhai in summer and autumn of 2021. The mass concentration of TVOC ranged from 11.7μg/m3（5% percentile） to 203μg/m3（95% percentile） with an average of 104μg/m3. The proportion of alkanes was the highest（39.7%）， followed by aromatic hydrocarbons（30%） and oxygen， nitrogenous hydrocarbons（13.9%）. The relative higher level of TVOC were mainly observed in autumn of 2021. The contribution of aromatic hydrocarbons and oxygen， nitrogenous hydrocarbons to TVOC significantly increased during October to November. The analysis of ozone formation potential indicated that alkanes and aromatic hydrocarbons had the highest contribution. Xylene/ethylbenzene， trimethylbenzene， toluene， and pentane/iso-pentane were the dominant VOCs species for ozone pollution control in Zhuhai， and their contribution to ozone formation was up to 56.0%. Pentane/iso pentane were mainly emitted from electronic specialized material manufacturing enterprises around the Jinwan air quality monitoring station， while xylene/ethylbenzene mainly came from wire and cable manufacturing, rubber and plastic product production enterprises nearby. |
| Key words: VOCs Time of flight mass spectrometry Cruise monitoring Pollution characteristics Zhuhai |
