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北京市大气挥发性有机物的关键活性组分及其来源 被引量:93

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摘要 大气中挥发性有机物(VOCs)是城市大气化学过程中的关键前体物.北京市大气中挥发性有机物(VOCs)总体上化学活性非常强.以大气中VOCs与OH自由基的反应速率为基础,比较分析北京市各类VOCs组分的化学活性.结果显示,在大气VOCs的混合比中大约仅占15%的烯烃化合物提供了大约75%的大气化学活性,其中尤以C4和C5的烯烃组分最为重要.大气VOCs各类排放源的成分谱研究表明,北京市大气中的烯烃主要来源于机动车尾气的排放和汽油挥发.对这两类源中的烯烃组分进行削减,将是控制北京市大气光化学烟雾污染的有效措施.
出处 《中国科学(D辑)》 CSCD 北大核心 2005年第A01期123-130,共8页 Science in China(Series D)
基金 国家重点基础研究发展规划项目(编号:TG1999045700) 国家自然科学基金项目(批准号:40275037) 国家科学技术部国际科技合作重点项目(编号:2004DFA06100)共同资助
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