研究报告
李昌鑫,王昊,叶坚锴,肖小芹,王舒文,何云峰.燃煤电厂区域颗粒物及颗粒物汞分布特征研究[J].环境科学学报,2020,40(8):2944-2951
燃煤电厂区域颗粒物及颗粒物汞分布特征研究
- Pollution characteristics of particulate matter and particulate mercury near a coal-fired power plant
- 基金项目：国家自然科学基金（No.31370518）
- 作者
- 单位
- 李昌鑫
- 浙江大学环境与资源学院, 杭州 310058
- 王昊
- 浙江大学环境与资源学院, 杭州 310058
- 叶坚锴
- 浙江大学环境与资源学院, 杭州 310058
- 肖小芹
- 浙江大学环境与资源学院, 杭州 310058
- 王舒文
- 浙江大学环境与资源学院, 杭州 310058
- 何云峰
- 浙江大学环境与资源学院, 杭州 310058
- 摘要：对东南沿海平原地区某燃煤电厂不同方位距离的9个采样点进行为期9个月的大气颗粒物采集，以PM2.5、PM10为对象，研究了颗粒物与颗粒物汞的时空分布，探讨了燃煤电厂排放对周边大气颗粒物与颗粒物汞分布的影响.结果表明：①本研究区PM2.5平均浓度为78.10 μg·m-3，其中颗粒物汞平均浓度为294.88 pg·m-3；PM10平均浓度为114.48 μg·m-3，其中颗粒物汞平均浓度为363.41 pg·m-3，均高于海内外众多城市.②冬季颗粒物、碳组分及颗粒物汞的浓度远高于春、夏、秋三季，冬季燃煤量大、逆温等气象因素及远距离污染物传输均造成当地冬季颗粒物累积.③大气颗粒物汞浓度随距电厂距离的增加先增加后降低，最大浓度范围为电厂W-NW方向1.3~2.5 km处.④各采样点均受到多种污染源共同影响，以燃煤尘为主，餐饮油烟、机动车尾气、生物质燃烧和扬尘次之，燃煤电厂对周边区域环境大气可吸入颗粒物主要影响区域为W-NW方向1.3~2.5 km.
- Abstract：During 9 months, PM2.5 and PM10 samples were collected at 9 sampling sites in different directions and distances of a coal-fired power plant on the southeast coast of China. This study had investigated the seasonal and spatial distribution of particulate matter and particulate mercury(Hgp), and discussed the impact of power plant emissions on the surrounding atmosphere. The main results are as follows: ① The average concentration of PM2.5 and PM10 were 78.10 μg·m-3 and 114.48 μg·m-3, and the average concentration of Hgp among them were 294.88 pg·m-3 and 363.41 pg·m-3, respectively. These were much higher than those in many cities in the world.② The highest concentration of particulate matter, carbon components and Hgp were observed in winter, much higher than that in other seasons, probably because of the highest coal consumption, the meteorological factors such as inversion temperature and the transmission of long-distance pollutants. ③ The concentration of Hgp increased first and then decreased with the increase of the distance from the power plant, and the maximum concentration appeared on 1.3~2.5 km in the W-NW direction of the power plant. ④ Each sampling site was affected by a variety of pollution sources, burning coal dust was ranking the first, with lampblack, motor vehicle exhaust, biomass burning dust followed, and the main affected area of coal-fired power plant was 1.3~2.5 km in the W-NW direction.
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