DOI: 10.1016/j.atmosenv.2017.11.059
Scopus记录号: 2-s2.0-85036634314
论文题名: Wet deposition of mercury in Qingdao, a coastal urban city in China: Concentrations, fluxes, and influencing factors
作者: Chen L ; , Li Y ; , Liu C ; , Guo L ; , Wang X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 174 起始页码: 204
结束页码: 213
语种: 英语
英文关键词: Controlling factors
; Mercury
; Qingdao
; Sources
; Speciation
; Wet deposition
Scopus关键词: Alkylation
; Atmospheric movements
; Elementary particle sources
; Mercury (metal)
; Mercury compounds
; Meteorological problems
; Regression analysis
; Atmospheric depositions
; Backward trajectory analysis
; Controlling factors
; Multiple regression analysis
; Qingdao
; Speciation
; Volume-weighted means
; Wet deposition
; Deposition
; methylmercury
; concentration (composition)
; mercury (element)
; methylation
; multiple regression
; particulate flux
; particulate matter
; pollutant source
; speciation (chemistry)
; urban area
; wet deposition
; Article
; China
; city
; controlled study
; dissolution
; methylation
; particulate matter
; precipitation
; priority journal
; seashore
; species differentiation
; urban area
; volume
; wet deposition
; China
; Qingdao
; Shandong
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Mercury (Hg) is a global pollutant of public concern because of its high toxicity and capability for worldwide distribution via long-range atmospheric transportation. Wet atmospheric deposition is an important source of Hg in both terrestrial and aquatic environments. Concentrations of various Hg species in precipitation were monitored from March 2016 to February 2017 in a coastal urban area of Qingdao, and their wet deposition fluxes were estimated. The results showed that the volume-weighted mean (VWM) concentrations of total mercury (THg), reactive mercury (RHg), dissolved THg (DTHg), particulate THg (PTHg), total methylmercury (TMeHg), and dissolved and particulate MeHg (DMeHg and PMeHg) in Qingdao's precipitation were 13.6, 1.5, 5.4, 8.2, 0.38, 0.15, and 0.22 ng L−1, respectively, and their annual deposition fluxes were estimated to be 5703.0 (THg), 666.6 (RHg), 2304.0 (DTHg), 3470.4 (PTHg), 161.6 (TMeHg), 64.0 (DMeHg), and 95.7 (PMeHg) ng m−2 y−1, respectively. A relatively high proportion of MeHg in THg was observed in precipitation (3.0 ± 2.6%) possibly due to higher methylation and contributions from an oceanic source to MeHg in the precipitation. Obvious seasonal variations in Hg concentrations and deposition fluxes were observed in the precipitation in Qingdao. Correlation analyses and multiple regression analyses showed that SO2, pH, and NO3 − were the controlling factors for THg in precipitation, whereas the MeHg concentration was primarily controlled by the SO2, WS, Cl−, and THg concentrations. PM2.5 and Cl− were the major controlling factors for PMeHg/TMeHg, whereas the TMeHg/THg ratio was mainly influenced by Cl−. The THg and MeHg fluxes were primarily controlled by precipitation, whereas Cl− was also an important factor for the MeHg wet deposition flux. The results of a 72-h backward trajectory analysis in the study region with the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model indicated that Hg deposition in Qingdao mainly originated from four major sources, i.e., the local area, northwestern China, southeastern China and an oceanic source. This oceanic source is an important source of Hg (especially MeHg) in the precipitation in Qingdao. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83082
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao, China; Meteorological Bureau of Qingdao, Qingdao, China
Recommended Citation:
Chen L,, Li Y,, Liu C,et al. Wet deposition of mercury in Qingdao, a coastal urban city in China: Concentrations, fluxes, and influencing factors[J]. Atmospheric Environment,2018-01-01,174