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| Study on the temporal and spatial variation of VOCs in environmental air of Shijiazhuang City |
| Wang Mengxuan, Tian Jianli, Song Lan, Cui Jiansheng, Liu Daxi, Duan Lili |
| Insititute of Environmental Science and Engineeringm, Hebei University of Science and Technology, Shijiazhuang 050081, China |
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Abstract At present, the environmental air situation in our country is very severe, and the kinds of pollutants in the atmosphere are various and complex. The main pollutant that leads to the deterioration of the atmospheric environment quality is volatile organic pollutant (VOCs) that exists widely in the air, which composition is complex and is easy to react with other components in ambient air to form secondary organic aerosol which is harmful to the environment and human health. Avolume of 3 L Suma cans (SUMMA) was used for sample collection. The QP 2010 Plus gas chromatography/mass spectrometer was used for qualitative and quantitative analysis of VOCs in Shijiazhuang urban area. It is found that the total mass concentration of VOCs in the ambient air of Shijiazhuang is 15.33 ~ 145.07 μg/m3, the average concentration is 40.36 μg/m3; the concentration of dichloromethane accounts for the largest total concentration of VOCs, up to 13.70%, follows by toluene accounted for 12.63%; the characteristic pollutants are difluoromethylene chloride, methyl chloride, dichloromethane, 1,2-dichloroethane, benzene, toluene; New and High-tech Zones VOCs concentration is generally high; VOCs and PM2.5 show the best correlation, 0.82.
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