摘要
2017年10月在广州南沙对大气中挥发性有机化合物(VOCs)进行了观测,并对其变化特征和臭氧生成潜势进行了分析。结果表明:测得的VOC总平均浓度为37.5 ppb,表现为烷烃>苯系物>烯烃;烷烃日变化幅度较大,白天出现两个峰值与早晚交通高峰对应;烯烃浓度日变化不明显,与季节变化引起天然源排放的异戊二烯浓度大幅下降有关;芳香烃日间变化幅度较小;测得的大气中烷烃、烯烃和芳香烃对总VOCs的OFP贡献分别为21.9%、28.7%和47.9%。
Volatile organic compounds（VOCs） in the atmosphere were observed in the nansha districtof Guangzhou in October 2017,and their change characteristics and ozone formation potential were analyzed. The total average concentration of VOC was 37.5 PPB,which was represented as alkanesbenzene seriesolefin.The daily variation range of alkanes was large, and the two peaks in the day corresponded to the morning and evening traffic peaks. The diurnal variation of olefin concentration was not obvious, which was related to the sharp decrease of isoprene concentration caused by seasonal change. The daily variation range of aromatic hydrocarbons was small. The contributions of alkanes, olefins and aromatic hydrocarbons in the measured atmosphere to OFP of total VOCs was 21.9%,28.7% and 47.9% respectively.
作者
冯志诚
周炎
Feng Zhicheng;Zhou Yan
出处
《广州环境科学》
2018年第1期10-12,共3页
Guangzhou Environmental Science
关键词
VOC
污染特征
臭氧生成潜势
VOC
pollution characteristics
ozone formation potential
