【摘要】 为弄清石家庄市冬季大气中VOCs的污染特征,采用美国环保局TO-15方法对石家庄市冬季大气中VOCs组成进行了定性和定量分析。在此基础上,进行了VOCs的月度变化分析、春节期间的变化分析,并进行了VOCs与空气质量指数AQI、PM2.5等之间的相关性分析;根据VOCs组成及变化情况和相关性,分析了其可能的来源。结果表明,石家庄市冬季大气中VOCs的质量浓度为145.7~1 410.7μg/m3,VOCs组分主要有丙酮、二氯甲烷、苯、乙酸乙酯、甲苯、1,2-二氯丙烷、三氯甲烷。春节期间,大气中VOCs的浓度有大幅的下降,比日常均值下降了40.9%。AQI较高时,大气中VOCs浓度有所升高。石家庄市冬季大气中丙酮、二氯甲烷、乙酸乙酯等主要来源于医药化工生产活动,苯、甲苯主要来源于煤燃烧。更多还原

【Abstract】 In order to find out the pollution characteristics of VOCs in the atmosphere in winter of Shijiazhuang,qualitatively and quantitatively analyzed the components of VOCs according to US EPA TO-15 method. Analyzed the monthly change and the change during the Spring Festival of VOCs,moreover,analyzed the correlation between VOCs and air quality index,such as AQI index,PM2. 5and so on; according to the VOCs components,the changes and the correlation,analyzed the possible sources of VOCs. It showed that the concentration of VOCs in the winter of Shijiazhuang was from 145. 7 μg / m3 to 1 410. 7 μg / m3. The main components of VOCs were acetone,dichloromethane,ethyl acetate,benzene,toluene,chloroform,1,2-dichloropropane and chloroform. During the Spring Festival,the concentration of VOCs in the atmosphere had a sharp decline which was 40. 9%lower than the average concentration. When the AQI index was high, VOCs concentration increased. The acetones,dichloromethane,ethyl acetate in the atmosphere of Shijiazhuang were mainly from the pharmaceutical and chemical production activities; benzene and toluene were mainly from coal combustion.更多还原