华北城市PM2.5、PM10污染水平及两者相关性研究

摘要

Continuous monitoring byβ-ray absorption method is used for urban air quality in North cities, and results show that the pollution is relatively severe in summer, autumn and winter, it is light in autumn. Diur-nal variation of the average concentration of PM2. 5 and PM10 show that larger PM2. 5 and PM10 that harm human body accounted for a larger proportion, an average of 75. 6%, and there is obvious linear relationship between the concentration of PM2. 5 and PM10 . The effect of three meteorological parameters on atmospheric fine particle pollutants shows descending sequence:humidity > wind velocity> temperature for the absence of rain, snow and wind.%采用β射线吸收法对华北城市大气环境质量进行连续监测，监测发现：夏、秋、冬三季污染整体相对严重，秋季污染较轻。 PM2.5和PM10平均浓度的日变化表明：对人体危害较大的PM2.5占PM10的比重较大，平均达到75.6%，且PM2.5浓度和PM10浓度呈极显著线性关系。无降雨降雪大风等特殊天气下，三种气象参数对大气细颗粒污染物的影响由高到低排列为：湿度>风速>温度。