DOI: 10.1016/j.atmosenv.2013.12.011
Scopus记录号: 2-s2.0-84893150263
论文题名: Mercury speciation in wet deposition samples collected from a coastal area of Minamata Bay
作者: Marumoto K ; , Matsuyama A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 86 起始页码: 220
结束页码: 227
语种: 英语
英文关键词: Dissolved mercury
; East Asia
; Monomethylmercury
; Reactive mercury
; Wet deposition
Scopus关键词: East Asia
; Long range transport
; Mercury speciations
; Monomethylmercury
; Seasonal variation
; Volume-weighted means
; Wet deposition
; Wet deposition flux
; Alkylation
; Dissolution
; Mercury (metal)
; Photochemical reactions
; Deposition
; mercury
; monomethyl mercury
; unclassified drug
; air sampling
; atmospheric chemistry
; coastal zone
; concentration (composition)
; dissolved load
; mercury (element)
; photochemistry
; seasonal variation
; speciation (chemistry)
; ultraviolet radiation
; wet deposition
; article
; bay
; concentration (parameters)
; controlled study
; demethylation
; methylation
; priority journal
; seashore
; seasonal variation
; species differentiation
; spring
; summer
; ultraviolet radiation
; wet deposition
; winter
; Far East
; Japan
; Kumamoto
; Kyushu
; Minamata Bay
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: To better understand the methylation and demethylation of mercury (Hg) in the atmosphere, monomethyl mercury (MMHg) concentrations in wet deposition samples collected in the Minamata Bay area from September, 2009 to August, 2010 were determined. The concentrations of total Hg (dissolved Hg+particulate Hg) and dissolved reactive Hg were also measured. The volume-weighted mean concentrations of dissolved MMHg and total Hg were 0.061 and 5.9ngL-1, respectively. Almost 90% of total Hg was in the dissolved phase and dissolved reactive Hg was the dominant Hg species in the wet deposition. The wet deposition fluxes of total Hg and reactive Hg increased in the rainy season (summer and fall), while the concentrations and wet deposition fluxes of MMHg were higher in winter and spring than in summer. Factors affecting this seasonal variation of MMHg were also considered. The MMHg in wet depositions may be decomposed by the increased levels of UV radiation in summer months, although MMHg can also be emitted from anthropogenic and biogenic sources and/or produced by photochemical reactions. Long-range transport from the Asian continent may also contribute to the seasonal variation of the wet MMHg deposition flux. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80793
Appears in Collections: 气候变化事实与影响
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作者单位: Environmental Chemistry Section, National Institute for Minamata Disease, 4058-18 Hama, Minamata-shi, Kumamoto 867-0008, Japan
Recommended Citation:
Marumoto K,, Matsuyama A. Mercury speciation in wet deposition samples collected from a coastal area of Minamata Bay[J]. Atmospheric Environment,2014-01-01,86