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首页> 外文期刊>International Journal of Environmental Research and Public Health >Distribution and Source Apportionment of Polycyclic Aromatic Hydrocarbons (PAHs) in Forest Soils from Urban to Rural Areas in the Pearl River Delta of Southern China
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Distribution and Source Apportionment of Polycyclic Aromatic Hydrocarbons (PAHs) in Forest Soils from Urban to Rural Areas in the Pearl River Delta of Southern China

机译：南方珠江三角洲城市到农村森林土壤中多环芳烃的分布及源分配

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摘要

The upper layer of forest soils (0–20 cm depth) were collected from urban, suburban, and rural areas in the Pearl River Delta of Southern China to estimate the distribution and the possible sources of polycyclic aromatic hydrocarbons (PAHs). Total concentrations of PAHs in the forest soils decreased significantly along the urban–suburban–rural gradient, indicating the influence of anthropogenic emissions on the PAH distribution in forest soils. High and low molecular weight PAHs dominated in the urban and rural forest soils, respectively, implying the difference in emission sources between the areas. The values of PAH isomeric diagnostic ratios indicated that forest soil PAHs were mainly originated from traffic emissions, mixed sources and coal/wood combustion in the urban, suburban and rural areas, respectively. Principal component analysis revealed that traffic emissions, coal burning and residential biomass combustion were the three primary contributors to forest soil PAHs in the Pearl River Delta. Long range transportation of PAHs via atmosphere from urban area might also impact the PAHs distribution in the forest soils of rural area.
机译：从中国南方的珠江三角洲的城市，郊区和农村地区收集了上层森林土壤（深度为0–20 cm），以估计多环芳烃（PAHs）的分布和可能的来源。森林土壤中PAHs的总浓度沿城市-郊区-农村的梯度显着下降，表明人为排放对森林土壤中PAHs分布的影响。高分子量和低分子量多环芳烃分别在城市和农村的森林土壤中占主导地位，这暗示着这些地区之间排放源的差异。多环芳烃异构体诊断率的值表明，森林土壤多环芳烃分别主要来自城市，郊区和农村地区的交通排放，混合源和煤/木材燃烧。主成分分析表明，交通排放，燃煤和住宅生物质燃烧是造成珠江三角洲森林土壤多环芳烃的三个主要因素。从城市地区通过大气进行多环芳烃的远距离运输也可能会影响多环芳烃在农村地区森林土壤中的分布。

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