title: [Pollution characteristics and distribution of polycyclic aromatic hydrocarbons and organochlorine pesticides in groundwater at Xiaodian Sewage Irrigation Area, Taiyuan City].
abstract: Sewage irrigation has been widely used in areas of water shortage in northern China, and it may introduce organic contaminants into groundwater. To characterize the organic contaminants in groundwater in sewage irrigation area, the Xiaodian sewage irrigation area in Shanxi Province was chosen as the case study area. A total of 16 groundwater samples (13 from shallow aquifer, 3 from deep aquifer) were collected. Polycyclic aromatic hydrocarbons (PAHs) were determined by gas chromatography-mass spectrometry (GC-MS) and organochlorine pesticides (OCPs) were ainalyzed by gas chromatography-electron capture detection (GC-ECD). The results showed that the concentrations of PAHs ranged from 13.98 to 505.89 ng x L(-1) with an average concentration of 115.67 ng x (L)(-1). The 2 and 3 ring-PAHs were the main components, while naphthalene and phenanthrene were most frequently detected. The concentrations of OCPs were in the range of 13.91-103.23 ng x L(-1) with an average concentration of 40.99 ng x L(-1), while alpha-HCH, delta-HCH, o,p'-DDD, Aldrin, Endosulfan-sulfate and HCB were most frequently detected. Overall, shallow aquifers appeared more contaminated with these pollutants than deep aquifers. In the area, the order of the organic contaminants concentration in groundwater was: East Main Channel < Beizhang Drainage < Taiyu Drainage, which indicated the quality of groundwater was influenced by the sewage irrigation.
authors.forename: Jia-le
authors.initials: JL
authors.lastname: Li
authors.forename: Cai-xiang
authors.initials: CX
authors.lastname: Zhang
authors.forename: Yan-xin
authors.initials: YX
authors.lastname: Wang
authors.forename: Xiao-ping
authors.initials: XP
authors.lastname: Liao
authors.forename: Lin-lin
authors.initials: LL
authors.lastname: Yao
authors.forename: Min
authors.initials: M
authors.lastname: Liu
authors.forename: Liang
authors.initials: L
authors.lastname: Xu
mesh_terms: D057914:Agricultural Irrigation; D002681:China; D002849:Chromatography, Gas; D002947:Cities; D004726:Endosulfan / Q000031:analogs & derivatives; D004784:Environmental Monitoring; D008401:Gas Chromatography-Mass Spectrometry; D060587:Groundwater / Q000737:chemistry*; D001556:Hexachlorocyclohexane; D006843:Hydrocarbons, Chlorinated / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D012722:Sewage
chemical_list: D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues; D011084:Polycyclic Aromatic Hydrocarbons; D012722:Sewage; C040534:alpha-hexachlorocyclohexane; C086916:delta-hexachlorocyclohexane; D001556:Hexachlorocyclohexane; C544689:endosulfan sulfate; D004726:Endosulfan