title: The sources of trace element pollution of dry depositions nearby a drinking water source.
abstract: Miyun Reservoir is one of the most important drinking water sources for Beijing. Thirteen atmospheric PM sampling sites were established around this reservoir to analyze the mineral composition, morphological characteristics, element concentration, and sources of atmospheric PM pollution, using transmission electron microscope, X-ray diffraction, and inductively coupled plasma mass spectrometry analyses. The average monthly dry deposition flux of aerosols was 15.18 g/m2, with a range of 5.78-47.56 g/m2. The maximum flux season was winter, followed by summer, autumn, and spring. Zn and Pb pollution in this area was serious, and some of the sample sites had Cr, Co, Ni, and Cu pollution. Deposition fluxes of Zn/Pb in winter and summer reached 99.77/143.63 and 17.04/33.23 g/(hm2month), respectively. Principal component analysis showed two main components in the dry deposition; the first was Cr, Co, Ni, Cu, and Zn, and the other was Pb and Cd. Principal sources of the trace elements were iron mining and other anthropogenic activities in the surrounding areas and mountainous area north of the reservoir. Mineralogy analysis and microscopic conformation results showed many iron minerals and some unweathered minerals in dry deposition and atmospheric particulate matter, which came from an iron ore yard in the northern mountainous area of Miyun County. There was possible iron-rich dry deposition into Miyun Reservoir, affecting its water quality and harming the health of people living in areas around the reservoir and Beijing.
authors.affiliation: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Xinyue
authors.initials: X
authors.lastname: Guo
authors.affiliation: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China. ji.hongbing@hotmail.com.
authors.forename: Hongbing
authors.initials: H
authors.lastname: Ji
authors.affiliation: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Cai
authors.initials: C
authors.lastname: Li
authors.affiliation: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Gao
authors.affiliation: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Huaijian
authors.initials: H
authors.lastname: Ding
authors.affiliation: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.|The Geological Engineering Design and Research Institute of Beijing, Beijing, 101500, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Tang
authors.affiliation: The Geological Engineering Design and Research Institute of Beijing, Beijing, 101500, China.
authors.forename: Jinguo
authors.initials: J
authors.lastname: Feng
mesh_terms: D060766:Drinking Water / Q000737:chemistry; D004787:Environmental Pollution / Q000032:analysis*; D052638:Particulate Matter / Q000032:analysis; D014131:Trace Elements / Q000032:analysis*; D014961:X-Ray Diffraction
chemical_list: D060766:Drinking Water; D052638:Particulate Matter; D014131:Trace Elements
keywords: Atmospheric pollution; Dry deposition flux; Miyun Reservoir; Particulate matter; Sources; Trace metal