Li Wei, Wang Chen, Shen Huizhong, Su Shu, Shen Guofeng, Huang Ye, Zhang Yanyan, Chen Yuanchen, Chen Han, Lin Nan, Zhuo Shaojie, Zhong Qirui, Wang Xilong, Liu Junfeng, Li Bengang, Liu Wenxin, Tao Shu
Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, PR China.
Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, PR China.
Environ Pollut. 2015 Feb;197:156-164. doi: 10.1016/j.envpol.2014.12.019. Epub 2014 Dec 19.
Twelve nitro-PAHs (nPAHs) and four oxy-PAHs (oPAHs) were measured in air samples for 12 months at 18 sites in urban settings, rural villages, or rural fields in northern China. The nPAH concentrations were higher in urban areas (1.3 ± 1.3 ng/m(3)), and nPAH/parent PAH ratios were higher (suggesting important contributions from motor vehicles and secondary formation) in urban sites than in rural villages. oPAHs are primarily emitted from solid fuel combustion and motor vehicles, and similar oPAH concentrations were found in urban areas (23 ± 20 ng/m(3)) and rural villages (29 ± 24 ng/m(3)). The high numbers of motor vehicles in Beijing and intensive industrial activity in Taiyuan and Dezhou caused higher nPAH concentrations. No spatial trend in oPAH concentrations was found in the rural villages, because similar oPAH mixtures are emitted from solild fuel combustion. The nPAH and oPAH concentrations were higher in the winter, and correlated with residential energy consumption and precipitation.
在中国北方城市、乡村或农村地区的18个地点采集了12个月的空气样本，检测了其中的12种硝基多环芳烃（nPAHs）和4种含氧多环芳烃（oPAHs）。城市地区的nPAH浓度较高（1.3±1.3 ng/m³），城市地点的nPAH/母体PAH比值高于农村，这表明机动车排放和二次生成的贡献较大。oPAHs主要来自固体燃料燃烧和机动车排放，城市地区（23±20 ng/m³）和农村地区（29±24 ng/m³）的oPAH浓度相近。北京机动车数量众多，太原和德州工业活动密集，导致nPAH浓度较高。农村地区oPAH浓度没有空间趋势，因为固体燃料燃烧排放的oPAH混合物相似。nPAH和oPAH浓度在冬季较高，且与居民能源消耗和降水量相关。
