DOI: 10.1016/j.atmosenv.2014.09.054
Scopus记录号: 2-s2.0-84907710254
论文题名: Characteristics of total and methyl mercury in wet deposition in a coastal city, Xiamen, China: Concentrations, fluxes and influencing factors on Hg distribution in precipitation
作者: Xu L ; , Chen J ; , Yang L ; , Yin L ; , Yu J ; , Qiu T ; , Hong Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 99 起始页码: 10
结束页码: 16
语种: 英语
英文关键词: Methyl mercury
; Precipitation
; Seasonal variation
; Total mercury
; Wet deposition flux
Scopus关键词: Coastal cities
; Methyl mercury
; Seasonal variation
; Total mercuries
; Wet deposition
; Wet deposition flux
; Precipitation (chemical)
; coal
; methylmercury
; rain
; aerosol
; coal
; coastal zone
; combustion
; concentration (composition)
; correlation
; methylmercury
; precipitation assessment
; scavenging (chemistry)
; sea salt
; seasonal variation
; traffic emission
; wet deposition
; Article
; combustion
; exhaust gas
; precipitation
; seashore
; seasonal variation
; wet deposition
; China
; Fujian
; Xiamen
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: Daily precipitation samples were collected from June 2012 to May 2013at four observation sites in Xiamen, a coastal city of Southeast China. Concentrations of Total mercury (THg) and methyl mercury (MeHg) in precipitation were rigorously treated and determined. The annual volume-weighted mean concentrations of THg and MeHg at four sites were 12.3 and 0.053ngL-1, and wet deposition fluxes of THg and MeHg were 14.04μgm-2yr-1 and 58.2ngm-2yr-1, respectively. MeHg could account for 0.43% of THg, and dissolved Hg contributed 55.4% to THg. There was no significant difference in THg concentration between monsoon and non-monsoon seasons, which was consistent with neither the general seasonal pattern of inland cities of China nor the report from the Gulf coast. Higher wet deposition flux of THg in monsoon season was a function of intense rainfall, whereas higher MeHg flux in non-monsoon season could attribute to increased MeHg concentration. Atmospheric Hg was more efficiently scavenged during the earlier period of the rain event. Positive correlations between precipitation depth and wet deposition fluxes suggested that rainfall played an important role in scavenging atmospheric Hg rather than diluting concentrations. Pearson correlation analysis combined with ions ratios implied that sea salt aerosols had an important impact on rainwater, but coal combustion and traffic emission could be the dominant factors influencing THg in precipitation. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80513
Appears in Collections: 气候变化事实与影响
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作者单位: Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China; Graduate School of Chinese Academy of Sciences, Beijing, China; Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore; Environmental Monitoring Center of Xiamen, Xiamen, China
Recommended Citation:
Xu L,, Chen J,, Yang L,et al. Characteristics of total and methyl mercury in wet deposition in a coastal city, Xiamen, China: Concentrations, fluxes and influencing factors on Hg distribution in precipitation[J]. Atmospheric Environment,2014-01-01,99