State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
Environ Pollut. 2012 Feb;161:36-42. doi: 10.1016/j.envpol.2011.09.027. Epub 2011 Oct 24.
We investigated how urban land uses influence soil accumulation of polycyclic aromatic hydrocarbons (PAHs) in the urban green spaces composed of different vegetative cover. How did soil properties, urbanization history, and population density affect the outcomes were also considered. Soils examined were obtained at 97 green spaces inside the Beijing metropolis. PAH contents of the soils were influenced most significantly by their proximity to point source of industries such as the coal combustion installations. Beyond the influence circle of industrial emissions, land use classifications had no significant effect on the extent of PAH accumulation in soils. Instead, the nature of vegetative covers affected PAH contents of the soils. Tree-shrub-herb and woodland settings trapped more airborne PAH and soils under these vegetative patterns accumulated more PAHs than those of the grassland. Urbanization history, population density and soil properties had no apparent impact on PAHs accumulations in soils of urban green space.
我们研究了城市土地利用如何影响不同植被覆盖的城市绿地中多环芳烃（PAHs）的土壤积累。还考虑了土壤性质、城市化历史和人口密度如何影响结果。所检查的土壤是在北京大都市内的 97 个绿地中获得的。土壤中的 PAH 含量受其与工业点源（如煤炭燃烧装置）的接近程度的影响最大。在工业排放的影响范围之外，土地利用分类对土壤中 PAH 积累的程度没有显著影响。相反，植被覆盖的性质影响了土壤中的 PAH 含量。树木-灌木-草本和林地模式截留了更多的空气传播 PAH，这些植被模式下的土壤积累的 PAH 比草地多。城市化历史、人口密度和土壤性质对城市绿地土壤中 PAHs 的积累没有明显影响。
