Pollution Characteristics of Ambient Air VOCs of Seven Coastal Cities in Shandong Province
Air pollutants were collected in Qingdao,Yantai,Rizhao,Weihai,Weifang,Dongying and Binzhou of Shandong Province during November 2018 to January 2019,and the pollution levels,ozone(O3)formation potential,secondary organic aerosol(SOA)formation potential of 117 kinds of VOCs were analyzed by preconcentration-gas chromatography/mass spectrometry and high performance liquid chromatography.The results showed that concentrations of air VOCs varied significantly with the seven coastal cities,with Dongying(422 μg/m3)＞Binzhou(366 μg/m3)＞Yantai(324 μg/m3)＞Qingdao(261 μg/m3)＞Weihai(226 μg/m3)＞Weifang(192 μg/m3)＞Rizhao(146 μg/m3).Among them,the main VOCs pollutants in Qingdao,Yantai,Rizhao and Dongying were halogenated hydrocarbons,and alkane were the main VOCs pollutants in Weihai,Weifang and Binzhou.The O3 formation potential and SOA formation potential of Binzhou were the highest,which were 872 μg/m3 and 0.70 μg/m3,respectively.The O3 formation potential was the smallest in Rizhao,which was 220 μg/m3.And Dongying had the lowest SOA formation potential,which was 0.22 μg/m3.Aromatic hydrocarbons were important precursors of SOA in seven cities.
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