Journal ArticleDOI
A Synthesis of Progress and Uncertainties in Attributing the Sources of Mercury in Deposition
Steve E. Lindberg,Russell Bullock,Ralf Ebinghaus,Daniel R. Engstrom,Xinbin Feng,William F. Fitzgerald,Nicola Pirrone,Eric M. Prestbo,Christian Seigneur +8 more
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TLDR
It is agreed that the uncertainty is strongly dependent upon scale and that the question as stated is answerable with greater confidence both very near and very far from major point sources, assuming that the “global pool” is a recognizable “source.”Abstract:
A panel of international experts was convened in Madison, Wisconsin, in 2005, as part of the 8th International Conference on Mercury as a Global Pollutant. Our charge was to address the state of science pertinent to source attribution, specifically our key question was: "For a given location, can we ascertain with confidence the relative contributions of local, regional, and global sources, and of natural versus anthropogenic emissions to mercury deposition?" The panel synthesized new research pertinent to this question published over the past decade, with emphasis on four major research topics: long-term anthropogenic change, current emission and deposition trends, chemical transformations and cycling, and modeling and uncertainty. Within each topic, the panel drew a series of conclusions, which are presented in this paper. These conclusions led us to concur that the answer to our question is a "qualified yes," with the qualification being dependent upon the level of uncertainty one is willing to accept. We agreed that the uncertainty is strongly dependent upon scale and that our question as stated is answerable with greater confidence both very near and very far from major point sources, assuming that the "global pool" is a recognizable "source." Many regions of interest from an ecosystem-exposure standpoint lie in between, where source attribution carries the greatest degree of uncertainty.read more
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Book ChapterDOI
Tracking Long-range Atmospheric Transport of Contaminants in Arctic Regions Using Lake Sediments
Jane L. Kirk,Amber Gleason +1 more
TL;DR: In this article, the use of dated lake sediment cores to examine post-industrial (post-~ 1850) changes to atmospheric mercury and persistent organic pollutants (POPs) deposition, including atmospheric contaminant transport and deposition processes, the impacts of climate-induced changes on these processes, and the application of novel lake sediment core analyses to untangle trends in contaminant deposition due to multiple sources and environmental stressors.
Journal ArticleDOI
Evidence for microbially mediated production of elemental mercury (Hg0) in subarctic lake sediments
TL;DR: In this paper, the authors assessed the effect of nutrients, pH, ionic strength, and the role of microbes on Hg0 production from pristine lake sediments of the Hudson Bay Lowlands in Ontario, Canada.
Journal ArticleDOI
Analysis of solid sorbents for control and removal processes for elemental mercury from gas streams: a review
TL;DR: A review of the available solid sorbents available for elemental mercury control and removal processes, tested on a laboratory scale, can be found in this article, where the authors present an overview of the wide range of solid sorbent solutions and their modifications intended to increase affinity for Hg0.
Journal ArticleDOI
Monitoring And Quantification Of The Complex Bioaccumulation Process Of Mercury Ion In Algae By A Novel Aggregation-Induced Emission Fluorogen
Yusheng Jiang,Yusheng Jiang,Yuncong Chen,Maha Alrashdi,Wen Luo,Wen Luo,Ben Zhong Tang,Jihong Zhang,Jianguang Qin,Youhong Tang +9 more
TL;DR: In this paper, a specified aggregation-induced emission fluorogen (AIEgen) was used to monitor and quantify the complex bioaccumulation process in a microcosm aquatic ecosystem, and a relationship was built among photoluminescence (PL) intensity, AIEgen concentration, and Hg2+ concentration.
References
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Journal ArticleDOI
The biogeochemical cycling of elemental mercury: Anthropogenic influences☆
TL;DR: A review of the available information on global Hg cycling shows that the atmosphere and surface ocean are in rapid equilibrium; the evasion of Hg0 from the oceans is balanced by the total oceanic deposition of hg(II) from the atmosphere as mentioned in this paper.
Journal ArticleDOI
The Case for Atmospheric Mercury Contamination in Remote Areas
TL;DR: A review of the weaknesses in interpretation and the choice of information that has been used to argue against atmospheric Hg contamination can be found in this paper, where the authors examine the weaknesses of the information used to support the prevailing scientific view that natural geologic sources are the principal contributors of Hg.
Journal ArticleDOI
Global anthropogenic mercury emission inventory for 2000
TL;DR: Wilson et al. as mentioned in this paper presented a new inventory of global emissions of mercury to the atmosphere from anthropogenic sources for the year 2000, showing that the largest emissions of Hg to the global atmosphere occur from combustion of fossil fuels, mainly coal in utility, industrial, and residential boilers.
Journal ArticleDOI
Arctic springtime depletion of mercury
W.H. Schroeder,Kurt G. Anlauf,Leonard A. Barrie,J. Y. Lu,Alexandra Steffen,D. Schneeberger,Torunn Berg +6 more
TL;DR: In this paper, the authors show that during the spring (April to early June) of 1995, there were frequent episodic depletions in mercury vapour concentrations in Arctic surface air.