title: Distribution and Source of Polycyclic Aromatic Hydrocarbons (PAHs) in Water Dissolved Phase, Suspended Particulate Matter and Sediment from Weihe River in Northwest China.
abstract: Weihe River is a typical river located in the arid and semi-arid regions of Northwest China. In this study, the distribution and sources of 16 polycyclic aromatic hydrocarbons (PAHs) in Weihe River were investigated. The concentrations of ∑PAHs ranged from 351 to 4427 ng/L with a mean value of 835.4 ng/L in water dissolved phase (WDP), from 3557 ng/L to 147,907 ng/L with a mean value of 20,780 ng /L in suspended particulate matter (SPM), and from 362 to 15,667 ng/g dry weight (dw) with a mean value of 2000 ng/g dw in sediment, respectively. The concentrations of PAHs in Weihe River were higher compared with other rivers in the world. In both WDP and sediment, the highest concentrations of ∑PAHs were observed in the middle reach, while the lowest concentrations of ∑PAHs were found in the lower reach. For SPM, however, the PAHs concentrations in the lower reach were highest and the PAHs concentrations in the upper reach were lowest. The ratios of anthracene/(anthracene + phenanthrene) and fluoranthene/ (fluoranthene + pyrene) reflected a pattern of both pyrolytic and petrogenic input of PAHs in Weihe River. The potential ecosystem risk assessment indicated that harmful biological impairments occur frequently in Weihe River.
authors.affiliation: Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas (Ministry of Education), Chang'an University, Xi'an 710054, China. chyy18@163.com.|School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China. chyy18@163.com.
authors.forename: Yuyun
authors.initials: Y
authors.lastname: Chen
authors.affiliation: School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China. chdjr0119@163.com.
authors.forename: Rui
authors.initials: R
authors.lastname: Jia
authors.affiliation: School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China. ysk110@126.com.
authors.forename: Shengke
authors.initials: S
authors.lastname: Yang
mesh_terms: D002681:China; D017753:Ecosystem; D019015:Geologic Sediments / Q000032:analysis; D052638:Particulate Matter / Q000032:analysis*; D010616:Phenanthrenes / Q000032:analysis; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D011721:Pyrenes / Q000032:analysis; D018570:Risk Assessment; D045483:Rivers / Q000737:chemistry; D014867:Water / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D052638:Particulate Matter; D010616:Phenanthrenes; D011084:Polycyclic Aromatic Hydrocarbons; D011721:Pyrenes; D014874:Water Pollutants, Chemical; D014867:Water; C031181:phenanthrene; C030984:pyrene
keywords: Weihe River; ecological risk assessment; polycyclic aromatic hydrocarbons (PAHs); sources evaluation