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| 贵阳市大气PM10质量浓度和硫同位素组成特征 |
| Mass Concentrations and Sulfur Isotope Compositions of Atmospheric PM10 in Guiyang, China |
| 投稿时间：2020-06-04 修订日期：2022-05-23 |
| DOI： |
| 中文关键词: 贵阳市;PM10;质量浓度;硫同位素;特征 |
| 英文关键词: Guiyang; PM10; Mass concentration; Sulfur isotopes; Characteristics |
| 基金项目:贵州省科学技术基金项目(黔科合J字[2011]2089)；贵州省优秀科技教育人才省长专项资金项目（[2011]15号）；高层次人才科研条件特助经费项目（TZJF-2010年-078号） |
| 作者 | 单位 | 邮编 | | 肖德安 | 贵州理工学院 资源与环境工程学院 | 550003 | | 傅成诚 | 贵州省环境监测中心站 | | | 高兰兰 | 贵州省环境监测中心站 | | | 龚伟 | 贵州省环境监测中心站 | | | 张志敏 | 贵州省环境监测中心站 | |
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| 中文摘要: |
| 城市大气颗粒物是影响空气质量和人类健康的重要因素，但其污染水平和关键组分来源及其变异并不十分清楚。本研究分别对贵阳市两个代表性城区监测点冬季（2014年2月14日~20日）和夏季（2014年7月1日~7日）大气PM10进行了采集，分析其24小时平均质量浓度和硫酸根的硫同位素（δ34S值）组成特征，探讨大气PM10中硫的来源和变化。结果表明，贵阳市冬季和夏季采样期间大气PM10浓度分别为30~125μg/m3（平均70μg/m3）和21~104μg/m3（56μg/m3），均略高于我国现行空气质量的PM10 24小时平均浓度一级标准限值（50μg/m3）。贵阳市大气PM10中硫酸根的δ34S值范围为-3.98‰~-4.99‰（平均0.28±2.32‰），且冬季显著高于夏季，表明SO2排放主要来自化石燃料（除煤外）燃烧，燃煤的贡献量小，揭示了‘控煤减硫’措施推行的效果较好。 |
| 英文摘要: |
| Atmospheric particulate in cities is an important factor influencing air quality and human health. However, its pollution levels and sources of key components remain unclear in most city environments. This study collected atmospheric PM10 samples at two representative urban sites of Guiyang city across a winter time (14 to 20 February, 2014) and a summer time (1 to 7 July, 2014), respectively. Daily-based mass concentrations and sulfur isotope compositions of sulfate in PM10 samples were analyzed to explore sulfur sources of atmospheric PM10. The mass concentrations of atmospheric PM10 in winter and summer of Guiyang were 30~125μg/m3 (mean 70μg/m3) and 21~104μg/m3 (mean 56μg/m3), respectively, which were higher than the national level I standard (50μg/m3). The δ34S values of sulfate in atmospheric PM10 in Guiyang were -3.98~4.99‰ (mean 0.28±2.32‰), and was generally higher in winter than in summer. The main source of sulfur in atmospheric PM10 of Guiyang was fossil fuel (except coal) combustion, but the contributions of coal combustion was decreased, indicating that the coal-controlling measures have been effective in reducing SO2 emissions. |
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