Spatial distribution and sources of polycyclic aromatic hydrocarbons (PAHs) in soils from typical oil-sewage irrigation area, Northeast China
Spatial distribution and sources of polycyclic aromatic hydrocarbons (PAHs) in soils from typical oil-sewage irrigation area, Northeast China
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DOI：
10.1007/s10661-007-9974-x
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发表时间：
2008-08
影响因子：
3
通讯作者：
Xiaojun Li;Peijun Li;Xin Lin;Z. Gong;Shu-xiu Fan;Le Zheng;E. A. Verkhozina
中科院分区：
文献类型：
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作者：
Xiaojun Li;Peijun Li;Xin Lin;Z. Gong;Shu-xiu Fan;Le Zheng;E. A. Verkhozina
研究了中国东北部沈抚灌区土壤中16种优先多环芳烃(16种EPA-PAHs)的空间分布和来源。SIA(1.3 × 104ha)自20世纪60年代以来一直是我国重要的油污灌溉农田。对91个SIA控制点的土壤剖面进行了采样。结果表明，表层(0~20 cm)和亚表层(20~30 cm)土壤中四环和五环PAHs分别占总PAHs的71.2%和73.0%。菲(Phe)、荧菲(Fla)、芘(PYR)、苯并(B)荧菲(BBF)、苯并(A)芘(BaP)是5种主要的多环芳烃。土壤表层和次表层土壤中16种EPA-PAHs的浓度总体上呈下降趋势，表层土壤中16种EPA-PAHs的浓度在0.6~12.36 mg kg−1之间，而地下土壤中的−1浓度在0.04~4.99 mg kg−1之间。表层土壤中16种EPA-PAHs的浓度是地下土壤的3倍。表层土壤中草、木或煤的燃烧和石油燃烧以及地下土壤中的草、木或煤的燃烧和石油来源的组合可能是SIA中16种EPA-PAHs的最重要的贡献者，表明不同的污染时期。
Spatial distribution and sources of 16 priority polycyclic aromatic hydrocarbons (16 EPA-PAHs) in soils were studied in Shenfu Irrigation Area (SIA) located at northeast of China. SIA (1.3 × 104ha) was an important agricultural farmland irrigated with oil-sewage since the 1960s. Soil profiles at 91 sites controlling all SIA were sampled. The results demonstrated that four- and five-ring PAHs accounted for 71.2% and 73.0% of the total PAHs in surface (0–20 cm) and subsurface (20–30 cm) soil, respectively. Phenanthrene (Phe), Fluoranthene (Fla), Pyrene (Pyr), Benzo(b)fluoranthene (BbF), benzo(a)pyrene (BaP) were identified as five dominant individual PAHs. Generally, there was a decreasing trend in concentrations of 16 EPA-PAHs from upper to lower reaches (by distance away from source) within 0.6–12.36 mg kg−1and 0.04–4.99 mg kg−1in surface and subsurface soil, respectively. The concentrations of 16 EPA-PAHs in the surface soil were threefold higher than those in the subsurface soil. A combination of grass, wood or coal combustion and petroleum combustion in surface soil and a combination of grass, wood or coal combustion and petroleum sources in subsurface soil might be the most significant contributors of 16 EPA-PAHs in SIA, indicating different pollution periods.