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- Title
Spatial distribution and sources of polycyclic aromatic hydrocarbons (PAHs) in soils from typical oil-sewage irrigation area, Northeast China.
- Authors
Xiaojun Li; Peijun Li; Xin Lin; Zongqiang Gong; Shuxiu Fan; Le Zheng; Verkhozina, E. A.
- Abstract
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 × 104 ha) 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−1 and 0.04–4.99 mg kg−1 in 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.
- Subjects
CHINA; POLYCYCLIC aromatic compounds; SOIL testing; POLYCYCLIC aromatic hydrocarbons; ENVIRONMENTAL protection; SEWAGE disposal
- Publication
Environmental Monitoring & Assessment, 2008, Vol 143, Issue 1-3, p257
- ISSN
0167-6369
- Publication type
Article
- DOI
10.1007/s10661-007-9974-x