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题名: Spatial Analysis of PAHs in Soils along an Urban-Suburban-Rural Gradient: scale effect, distribution patterns, diffusion and influencing factors
作者: Peng, Chi; Wang, Meie; Chen, Weiping
刊名: SCIENTIFIC REPORTS
出版日期: 2016-11-17
卷号: 6, 期号:0, 页码:1-10
DOI: 10.1038/srep37185
部门归属: 城市与区域生态国家重点实验室
英文摘要: Spatial statistical methods including Cokriging interpolation, Morans I analysis, and geographically weighted regression (GWR) were used for studying the spatial characteristics of polycyclic aromatic hydrocarbon (PAH) accumulation in urban, suburban, and rural soils of Beijing. The concentrations of PAHs decreased spatially as the level of urbanization decreased. Generally, PAHs in soil showed two spatial patterns on the regional scale: (1) regional baseline depositions with a radius of 16.5 km related to the level of urbanization and (2) isolated pockets of soil contaminated with PAHs were found up to around 3.5 km from industrial point sources. In the urban areas, soil PAHs showed high spatial heterogeneity on the block scale, which was probably related to vegetation cover, land use, and physical soil disturbance. The distribution of total PAHs in urban blocks was unrelated to the indicators of the intensity of anthropogenic activity, namely population density, light intensity at night, and road density, but was significantly related to the same indicators in the suburban and rural areas. The moving averages of molecular ratios suggested that PAHs in the suburban and rural soils were a mix of local emissions and diffusion from urban areas.
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35665
Appears in Collections:城市与区域生态国家重点实验室_期刊论文

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Recommended Citation:
Peng, Chi,Wang, Meie,Chen, Weiping. Spatial Analysis of PAHs in Soils along an Urban-Suburban-Rural Gradient: scale effect, distribution patterns, diffusion and influencing factors[J]. SCIENTIFIC REPORTS,2016,6(0):1-10.
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