文献类型：期刊文献

英文题名：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

作者：Xiao, Yihua[1] Tong, Fuchun[2] Kuang, Yuanwen[3] Chen, Bufeng[1]

第一作者：肖以华

通信作者：Xiao, YH[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[2]South China Agr Univ, Coll Forestry, Guangzhou 510642, Guangdong, Peoples R China;[3]Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, South China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China

年份：2014

卷号：11

期号：3

起止页码：2642-2656

外文期刊名：INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH

收录：;Scopus(收录号：2-s2.0-84897871949);WOS:【SCI-EXPANDED(收录号:WOS:000334438200018)】；

基金：This work was supported by the Special Research Program of the Research Institute for Tropical Forestry, CAF (No. RITFYW2X201104), and the Program of Forest Ecological Benefits Monitoring Network in Guang Zhou (2013-2014). The study was also supported by the CFERN and GENE Award Funds for ecological papers.

语种：英文

外文关键词：forest soils; Pearl River Delta; polycyclic aromatic hydrocarbons; source apportionment; urban-rural gradient

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.