EFFECT OF COMPOSITION AND STATE OF ORGANIC-COMPONENTS ON POLYCYCLIC AROMATIC HYDROCARBON DECAY IN ATMOSPHERIC AEROSOLS
EFFECT OF COMPOSITION AND STATE OF ORGANIC-COMPONENTS ON POLYCYCLIC AROMATIC HYDROCARBON DECAY IN ATMOSPHERIC AEROSOLS
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DOI：
10.1021/es00061a024
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发表时间：
1994-11-01
影响因子：
11.4
通讯作者：
KAMENS, RM
中科院分区：
文献类型：
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作者：
MCDOW, SR;SUN, QR;KAMENS, RM
利用光化学转盘反应器研究了六种多环芳烃（PAHs）在实际有机气溶胶组分组成的液体中的光降解。所有六种多环芳烃表现出更快的衰减在液体混合物的甲氧基酚，丰富的一类化合物存在于木材烟雾，比十六烷，这是代表丰富的脂肪烃柴油机烟尘和汽车尾气。在十六烷和甲氧基苯酚中，观察到苯并[a]蒽和苯并[a]芘的衰减最快。甲氧基苯酚混合物中苯并[a]芘的衰变速度大约是十六烷中的七倍。结果表明，大气颗粒物中的有机成分会影响多环芳烃的衰减。
Photodegradation of six polycyclic aromatic hydrocarbons (PAHs) was studied in liquids composed of actual organic aerosol constituents using a photochemical turntable reactor. All six PAHs exhibited more rapid decay in a liquid mixture of methoxyphenols, an abundant class of compounds present in wood smoke, than in hexadecane, which is representative of aliphatic hydrocarbons abundant in diesel soot and automobile exhaust. The most rapid decay was observed for benz[a]anthracene and benzo[a]pyrene in both hexadecane and the methoxyphenols. Benzo[a]pyrene decay was approximately seven times faster in the methoxyphenol mixture than in hexadecane. The results indicate that the organic composition of atmospheric particulate matter can influence PAH decay.