title: [Distribution characteristics of polycyclic aromatic hydrocarbons in runoff from the middle line source area of south-to-north water diversion project].
abstract: The distribution characteristics of polycyclic aromatic hydrocarbons in runoff from the middle line source area of south-to-north water diversion project were studied. Five groups of artificial runoff fields were established to collect runoff based on the different types of land-use, the contents of 16 USEPA priority PAHs in the runoff were determined using GC/MS method. The results showed that the average concentrations of PAHs of the aqueous phase in the collected runoff samples of different land-use types decreased in the order:cultivated land (26.53 ng x L(-1)) > oak forest (20.91 ng x L(-1)) > orchard (17.59 ng x L(-1)), and the average concentrations of PAHs of the particle phase were cultivated land (1 073.72 ng x g(-1)) > orchard (652.29 ng x g(-1)) > oak forest (385.46 ng x g(-1)). The high carcinogenic components Bap were detected in both run off of cultivated land and orchard with a detected rate of 30%. According to National Recommended Water Quality Standards of priority toxic pollutants (2006 USEPA), it was found that Chr exceed standard 40%, with a detected rate of 100%. It was also found that the runoff volume and the total PAHs content in runoff increase with the slope, and PAHs loss and slope were closely related in same land-use types. Based on the Molecular Markers Indicative Law, it can be concluded that the dominant source of PAHs in runoff of study area was combustion of coal, and a small amount came from vehicle exhaust emissions. There is a certain degree of ecological risk about runoff PAHs pollution in the study area, which is worth further attention.
authors.affiliation: Department of Resources and Environment, Henan Polytechnic University, Jiaozuo 454000, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Tai
authors.forename: Kun-Feng
authors.initials: KF
authors.lastname: Zhang
authors.forename: Tian-Jian
authors.initials: TJ
authors.lastname: Zhou
authors.forename: Tong-Qian
authors.initials: TQ
authors.lastname: Zhao
authors.forename: Qing-Qing
authors.initials: QQ
authors.lastname: Wang
authors.forename: Xiao-Qi
authors.initials: XQ
authors.lastname: He
mesh_terms: D002681:China; D010316:Particle Size; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D011891:Rain / Q000737:chemistry*; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical