DOI: 10.1016/j.atmosenv.2014.03.059
Scopus记录号: 2-s2.0-84898904853
论文题名: Wet deposition fluxes of total mercury and methylmercury in core urban areas, Chongqing, China
作者: Wang Y ; , Peng Y ; , Wang D ; , Zhang C
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 92 起始页码: 87
结束页码: 96
语种: 英语
英文关键词: HYSPLIT
; Mercury
; Methylmercury
; Wet deposition fluxes
Scopus关键词: Mercury (metal)
; Rain
; Reservoirs (water)
; Backward trajectory analysis
; Chongqing , China
; HYSPLIT
; Methyl mercury
; Rainfall event
; Seasonal variation
; Total mercuries
; Wet deposition flux
; Deposition
; mercury
; methylmercury
; rain
; air mass
; flux measurement
; mercury (element)
; methylmercury
; pollutant source
; reservoir
; seasonal variation
; urban area
; wet deposition
; analytic method
; aquatic environment
; article
; atmospheric deposition
; biogeochemistry
; China
; dry deposition
; photodegradation
; priority journal
; reservoir
; seasonal variation
; summer
; urban area
; wet deposition
; winter
; China
; Chongqing
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: Wet deposition fluxes of mercury (Hg) species were estimated during the period from June 2010 to July 2011 at 3 sites in core urban areas in Chongqing, China. Rain water was collected by automatic deposition sampler for total Hg (THg) and methylmercury (MeHg) analyses. Our results showed that annual wet deposition fluxes of THg and MeHg were 28.7±5.1 and 0.28±0.09μgm-2yr-1, respectively. We estimate that MeHg wet deposition contributes 9.2-19.6% of the total MeHg flux to a local reservoir. Cumulative THg fluxes collected from nine principal rainfall events (>1.5μgm-2yr-1) at three sampling sites accounted for 20% of annual overall THg wet deposition. Statistical analyses yielded significant relationship between rainfall amounts and Hg wet deposition fluxes (r2=0.76, p<0.01 for THg; r2=0.65, p<0.01 for MeHg), suggesting that rainfall is one of the most important factors controlling the Hg fluxes. Obvious seasonal variations of THg fluxes were observed, with the maximum value occurring in summer (accounting for 40% of total annual THg deposition) while minimum values occurred in winter in all the three sampling sites. 72-h backward trajectory analysis on nine large deposition events at the three sites, using HYSPLIT model indicated that most of air masses which contain a relatively high precipitation amount and pass through major Hg sources would have an elevated Hg load. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80817
Appears in Collections: 气候变化事实与影响
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作者单位: College of Resources and Environment, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Soil Multi-scale Interfacial Process, Chongqing 400715, China; Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing 400715, China
Recommended Citation:
Wang Y,, Peng Y,, Wang D,et al. Wet deposition fluxes of total mercury and methylmercury in core urban areas, Chongqing, China[J]. Atmospheric Environment,2014-01-01,92