邯郸市曲周县大气污染特征分析

Analysis of Air Pollution Characteristics in Quzhou County, Handan City

为准确分析曲周县大气污染物浓度变化特征,选取了2019年1月1日-12月31日曲周县2个环境空气自动监测省控点的小时平均值,进行质控后的变化规律分析。结果表明:2019年曲周县PM_(2.5)和PM_(10)的年均浓度分别为63μg/m^(3)、114μg/m^(3),分别是国家二级标准的1.8倍和1.6倍。PM_(2.5)、PM_(10)日均浓度超过标准的天数分别为97天,82天,占全年的1/4;冬季PM_(2.5)与PM_(10)、CO、NO_(2)、SO_(2)均呈正相关,PM_(2.5)与PM_(10)、CO小时浓度之间有显著相关性,夏季PM_(2.5)同样与PM_(10)、CO、NO_(2)、SO_(2)呈正相关,但是相关系数与冬季相比均较差;PM_(2.5)和PM_(10)在污染物来源上有一定的同源性,且PM_(2.5)和PM_(10)整体呈现5-8月下降,9-12月上升的趋势。PM_(2.5)和PM_(10)在采暖期时浓度高于非采暖期;武装部和汉光重工两站点PM_(10)与PM_(2.5)的小时浓度值与风速、风向无明显相关性,与温度呈负相关性(p<0.01),与相对湿度正相关(p<0.01)。研究结果有利于从不同时空尺度辨析曲周县大气颗粒物污染的多变特征,为京津冀颗粒物污染联防联控提供参考。

In order to accurately analyze the variation characteristics of air pollutant concentration in Quzhou county,the hourly average values of two provincial control points for automatic monitoring of ambient air in Quzhou county from January 1 to December 31,2019 were selected,and the variation law after quality control was analyzed.The results show that the average annual concentrations of PM_(2.5)and PM_(10)in Quzhou county in 2019 are 63μg/m^(3) and 114μg/m^(3) respectively,which are 1.8 times and 1.6 times of the national secondary standard respectively.The daily average concentrations of PM_(2.5)and PM_(10)exceeded the standard for 97 days and 82 days respectively,accounting for 1/4 of the whole year.In winter,PM_(2.5)is positively CO rrelated with PM_(10),CO,NO_(2)and SO_(2),while in summer,PM_(2.5)is positively correlated with PM_(10),CO,NO_(2)and SO_(2),but the correlation coefficient is poorer than that in winter.PM_(2.5)and PM_(10)have certain homology in pollutant sources,and the overall trend of PM_(2.5)and PM_(10)is decreasing from May to August and increasing from September to December.The concentrations of PM_(2.5)and PM_(10)in heating period are higher than those in non-heating period.The hourly concentrations of PM_(10)and PM_(2.5)at the Armed Forces Department and Hanguang Heavy Industry Station have no obvious correlation with wind speed and direction,but are negatively correlated with temperature(p<0.01)and positively correlated with relative humidity(p<0.01).The results are beneficial to analyze the changeable characteristics of atmospheric particulate pollution in Quzhou county from different time and space scales,and provide reference for joint prevention and control of particulate pollution in Beijing,Tianjin and Hebei.