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近年来,随着我国经济的发展,机动车尾气和工业排放有机物VOCs日益增多,造成大气光化学烟雾污染严重。甲醛是对流层大气中最丰富的羰基化合物,在大气中的活性很高,它可以通过光分解作用生成HO2自由基,HO2自由基与NO快速反应生成OH自由基,故而甲醛成为重要的大气OH自由基来源。在一定的条件下甲醛对对流层自由基的贡献甚至比臭氧的贡献更大。
JIAQUANZAIXIANJIANCEXITONG,JUYOULIANXU、ZIDONG、GAOPIN、DIJIANCEXIANDENGYOUDIAN,KEYISHIXIANKONGQIZHONGHENLIANGJIAQUANDEKUAISUJINGQUECELIANG,CAOZUOJIANDANQIEYUNXINGKEKAO,GAIXITONGKEGUANGFANYONGYUHUANJINGJIANCEZHAN、QIXIANGJUYIJIGAOXIAOKEYANYUANSUODENGHUANJINGKONGQIZHILIANGJIANCECHANGZHONGJIAQUANZAIXIANCELIANG。