气相多环芳烃的大气化学：大气诱变剂的形成
Atmospheric chemistry of gas-phase polycyclic aromatic hydrocarbons: formation of atmospheric mutagens.
作者信息
Atkinson R, Arey J
机构信息
Statewide Air Pollution Research Center, University of California, Riverside 92521.
出版信息
Environ Health Perspect. 1994 Oct;102 Suppl 4(Suppl 4):117-26. doi: 10.1289/ehp.94102s4117.
Abstract
The atmospheric chemistry of the 2- to 4-ring polycyclic aromatic hydrocarbons (PAH), which exist mainly in the gas phase in the atmosphere, is discussed. The dominant loss process for the gas-phase PAH is by reaction with the hydroxyl radical, resulting in calculated lifetimes in the atmosphere of generally less than one day. The hydroxyl (OH) radical-initiated reactions and nitrate (NO3) radical-initiated reactions often lead to the formation of mutagenic nitro-PAH and other nitropolycyclic aromatic compounds, including nitrodibenzopyranones. These atmospheric reactions have a significant effect on ambient mutagenic activity, indicating that health risk assessments of combustion emissions should include atmospheric transformation products.
摘要
本文讨论了主要以气相形式存在于大气中的2至4环多环芳烃（PAH）的大气化学。气相PAH的主要损失过程是与羟基自由基反应，由此计算得出其在大气中的寿命通常不到一天。羟基（OH）自由基引发的反应和硝酸根（NO3）自由基引发的反应常常导致致突变性硝基PAH和其他硝基多环芳烃化合物的形成，包括硝基二苯并吡喃酮。这些大气反应对环境致突变活性有显著影响，这表明燃烧排放的健康风险评估应包括大气转化产物。
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