南京城區(qū)夏季大氣VOCs的來源及對SOA的生成研究——以亞青和青奧期間為例
發(fā)布時間:2018-10-31 18:49
【摘要】:運用大氣揮發(fā)性有機物快速在線連續(xù)自動監(jiān)測系統(tǒng),于2013年和2014年的8月對南京市區(qū)大氣中VOCs進行觀測,結果表明,VOCs的濃度分別為51.73×10~(-9)和77.47×10~(-9).利用OH消耗速率(L~(OH))有效評估VOCs的大氣化學反應活性.烯烴和芳香烴是這2年夏季南京市大氣VOCs中對L~(OH)貢獻最大的關鍵活性組分.用FAC法估算南京SOA生成潛勢,得到2013和2014年夏季SOA濃度分別為1.95μg/m~3和1.01μg/m~3;烷烴和芳香烴對SOA的生成潛勢分別占4.01%、94.8%和4.46%、94.57%.用PMF模型對南京VOCs進行來源解析,結果表明,2013年夏季南京大氣VOCs的最大來源為燃料揮發(fā)(22.7%)、其次為天然氣和液化石油氣泄漏(19.5%)、石油化工業(yè)(13.5%)、汽車尾氣排放(17.7%)、天然源排放(13.4%)和涂料/溶劑的使用(13.2%),而2014年夏季南京大氣VOCs的最大來源為天然氣和液化石油氣泄漏(35.2%)、其次為石油化工業(yè)(20.6%)、不完全燃燒(20.5%)、燃料揮發(fā)(15.7%)和汽車尾氣排放(8.1%).
[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】: 南京信息工程大學江蘇省大氣環(huán)境與裝備技術協(xié)同創(chuàng)新中心;江蘇省大氣環(huán)境監(jiān)測與污染控制高技術研究重點實驗室;江蘇省環(huán)境監(jiān)測中心;
【基金】:國家自然科學基金重大研究計劃(D0512/91544231) 江蘇省環(huán)?蒲姓n題(2015017)
【分類號】:X51
[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】: 南京信息工程大學江蘇省大氣環(huán)境與裝備技術協(xié)同創(chuàng)新中心;江蘇省大氣環(huán)境監(jiān)測與污染控制高技術研究重點實驗室;江蘇省環(huán)境監(jiān)測中心;
【基金】:國家自然科學基金重大研究計劃(D0512/91544231) 江蘇省環(huán)?蒲姓n題(2015017)
【分類號】:X51
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