南京城區(qū)夏季大氣VOCs的來(lái)源及對(duì)SOA的生成研究——以亞青和青奧期間為例
[Abstract]:The VOCs in Nanjing urban atmosphere was observed in August of 2013 and 2014 by using a rapid on-line automatic monitoring system for atmospheric volatile organic compounds. The results show that the concentrations of VOCs are 51.73 脳 10 ~ (-9) and 77.47 脳 10 ~ (-9), respectively. OH consumption rate (L ~ (OH) was used to evaluate the atmospheric chemical reaction activity of VOCs. Olefin and aromatic hydrocarbons are the most important active components of atmospheric VOCs in Nanjing in the past two years. FAC method was used to estimate the formation potential of SOA in Nanjing, and the SOA concentrations in summer of 2013 and 2014 were 1.95 渭 g/m~3 and 1.01 渭 g / mm3, respectively, and the formation potential of alkanes and aromatic hydrocarbons on SOA were 4.01% and 94.57%, respectively. The source analysis of Nanjing VOCs using PMF model shows that the largest source of Nanjing atmospheric VOCs in summer 2013 is fuel volatilization (22. 7%), followed by natural gas and liquefied petroleum gas leakage (19. 5%). Petrochemical industry (13.5%), automobile exhaust emissions (17.7%), natural source emissions (13.4%) and paint / solvent use (13.2%), The largest source of atmospheric VOCs in Nanjing in summer 2014 was natural gas and liquefied petroleum gas (35. 2%), followed by petrochemical industry (20. 6%), incomplete combustion (20. 5%). Fuel volatilization (15.7%) and vehicle exhaust emissions (8.1%).
【作者單位】: 南京信息工程大學(xué)江蘇省大氣環(huán)境與裝備技術(shù)協(xié)同創(chuàng)新中心;江蘇省大氣環(huán)境監(jiān)測(cè)與污染控制高技術(shù)研究重點(diǎn)實(shí)驗(yàn)室;江蘇省環(huán)境監(jiān)測(cè)中心;
【基金】:國(guó)家自然科學(xué)基金重大研究計(jì)劃(D0512/91544231) 江蘇省環(huán)?蒲姓n題(2015017)
【分類號(hào)】:X51
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