【摘要】 对2015年3月—2016年2月邯郸市大气中的PM₁₀、PM_2.5和PM_1.0进行了在线监测,探讨了其质量浓度的变化特征,并分析了其质量浓度与风速、风向的关系。结果表明:邯郸市颗粒物质量浓度水平较高,β射线吸收法所监测的PM_10WET、PM_2.5WET和PM_1.0WET年均浓度值分别为202.5,114.8,81.1μg/m³,PM_2.5DRY/PM_10WET和PM_2.5WET/PM_10WET分别为0.58、0.70,PM_1DRY/PM_2.5WET和PM_1WET/PM_2.5WET分别为0.58、0.71,PM_2.5为PM₁₀中的主要组成,PM_1.0为PM_2.5中的主要组成。邯郸市PM₁₀、PM_2.5和PM_1.0质量浓度冬季最高;PM₁₀、PM_2.5和PM_1.0日变化峰值为上午09:00左右,谷值为下午16:00左右,扬沙、降雨,霾和春节不同条件下PM₁₀、PM_2.5和PM_1.0差异明显。邯郸市PM₁₀、PM_2.5和PM_1.0的浓度高值主要分布在风向0°¹00°和175°²25°、风速小于1 m/s的情况下。更多还原

【Abstract】 This study monitored the online concentrations of PM₁₀,PM_{2. 5}and PM_1.0in Handan during March 2015 to February 2016,discussed the varied characteristics of mass concentration,and analyzed the relationship of mass concentration with wind speed and wind direction. The result showed that the concentration of particles had a higher level,the annual concentration of PM_10WET,PM_{2. 5WET}and PM_1.0WETmonitored by β-ray-absorption method were 202. 5,114. 8,81. 1μg/m³,PM_{2. 5DRY}/PM_10WETand PM_{2. 5WET}/PM_10WETwere 0. 58 and 0. 70,PM_1DRY/PM_{2. 5WET}and PM_1WET/PM_{2. 5WET}were 0. 58 and 0. 71. PM_{2. 5}was the major composition of PM₁₀,and PM_1.0was the major composition of PM_{2. 5}. The mass concentration of PM₁₀,PM_{2. 5}and PM_1.0in Handan was highest in winter. The peaks and the valleys of PM₁₀,PM_{2. 5}and PM_1.0were about 9: 00 a. m. and16: 00 p. m.,respectively. PM₁₀,PM_{2. 5}and PM_1.0were obviously different under several conditions: blowing sand,rain,haze and the Spring Festival. The high concentration of PM₁₀,PM_{2. 5}and PM_1.0mainly accumulated when the wind direction was 0° 100°and 175° 225°,and the wind speed was less than 1 m/s.更多还原