西安市西咸新区秋季大气挥发性有机物组分特征及臭氧生成潜势分析
Characteristics of atmospheric volatile organic compounds and ozone formation potential in autumn in Xixian New Area of Xi'an
窦蓓蕾 1李养养 1葛毅 2王春明 1杏艳 2胡盟 1李丹阳1
作者信息
- 1. 西安市生态环境局西咸新区分局,陕西 西安 712000
- 2. 陕西省环境监测中心站,陕西 西安 712000
- 折叠
摘要
为摸清西安市西咸新区挥发性有机物(VOCs)组分特征,于2022年8月21日至10月9日开展了 116种VOCs物种的在线监测.结果表明:(1)VOCs平均日体积分数为40.44×10-9,以烷烃、含氧挥发性有机物(OVOCs)和卤代烃为主.(2)烷烃、烯烃、芳香烃、卤代烃、炔烃与VOCs均呈现较明显的白天低、夜间高趋势;OVOCs和有机硫则呈现日间波动中逐渐上升、夜间达到峰值的特征.(3)总体积分数为48.39％的OVOCs、烯烃和芳香烃3种组分对臭氧生成潜势的贡献高达86.55％,西咸新区臭氧污染防治可从加强这3种组分的监测及来源入手.
Abstract
In order to find out the characteristics of volatile organic compounds(VOCs)components in Xixian New Area of Xi'an,116 VOCs species were monitored online from August 21 to October 9,2022.The results showed that:(1)the daily average volume fraction of VOCs was 40.44 × 10-9,mainly composed of alkanes,oxygenated volatile organic compounds(OVOCs)and halogenated hydrocarbons.(2)Alkanes,alkenes,aromatic hydrocarbons,halogenated hydrocarbons,alkynes and VOCs all showed an obvious trend of low in the daytime and high at night.OVOCs and organic sulfur showed the characteristics of gradually rising in the daytime oscillation and reaching the peak at night.(3)OVOCs,alkenes and aromatic hydrocarbons accounted for 48.39％by volume,contributed up to 86.55％to the generation of ozone formation potential.The prevention and control of O3 pollution in Xixian New Area of Xi'an could be started with strengthening the monitoring and sources of these three components.
关键词
挥发性有机物/组分特征/臭氧生成潜势/西安市Key words
volatile organic compounds/component characteristics/ozone formation potential/Xi'an引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据