环境化学
污染物
化学
煤燃烧产物
环境科学
转化(遗传学)
煤
特大城市
空间分布
生物质燃烧
生物量(生态学)
有机化学
遥感
地质学
气溶胶
生物化学
经济
经济
基因
海洋学
作者
Yan Lin,Xinghua Qiu,Yiqiu Ma,Jin Ma,Mei Zheng,Min Shao
标识
DOI:10.1016/j.envpol.2014.10.005
摘要
The occurrence of polycyclic aromatic hydrocarbons (PAHs) and nitrated derivatives (NPAHs), as well as their transformation may have significant health impacts on humans. To investigate the level, spatial distribution and the transformation process of PAHs and NPAHs in North China, we performed a gridded field passive air sampling campaign in summer of 2011. The median concentration of 25 PAH congeners and 13 NPAHs was 294 ng m−3 (or 26.7 μg sample−1) and 203 ng sample−1, respectively. Relative higher level of PAHs in Shanxi Province and NPAHs in megacities was observed. In North China, coal/biomass combustion and photochemical formation was the predominant source of PAHs and NPAHs, respectively. To investigate the relationship between these pollutants, a model incorporating NPAHs, PAHs and NO2 was established, and the result indicated that NO2 will promote the transformation processes from PAHs to NPAHs, which may increase the total toxicity of PAH–NPAH mixtures.
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