Atmospheric Mercury Speciation In Urban Air
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Atmospheric Mercury Speciation In Urban Air
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Author : Bian Liu
language : en
Publisher:
Release Date : 2006
Atmospheric Mercury Speciation In Urban Air written by Bian Liu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Atmospheric Mercury
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Author : Robert W. Talbot
language : en
Publisher: MDPI
Release Date : 2018-09-27
Atmospheric Mercury written by Robert W. Talbot and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-27 with Electronic book categories.
This book is a printed edition of the Special Issue "Atmospheric Mercury" that was published in Atmosphere
The Chemical Speciation And Phase Distribution Of Atmospheric Oxidized Mercury
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Author : Avik Ghoshdastidar
language : en
Publisher:
Release Date : 2019
The Chemical Speciation And Phase Distribution Of Atmospheric Oxidized Mercury written by Avik Ghoshdastidar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
"Mercury is a potent global neurotoxin that causes cognitive and neuromuscular damage. it is released through natural and anthropogenic processes, such as fossil fuel combustion, and travels far from its source of origin. A global concern, 130 countries have signed the 2013 UN Convention on Mercury, committing to reducing emissions. Atmospheric mercury primarily exists as three bulk species of which gaseous elemental mercury (GEM) predominates. GEM travels far from its source of origin due to its long atmospheric residence time and deposits in marine and terrestrial environments following chemical transformation to the more water-soluble, bioavailable gaseous oxidized mercury (GOM) and after binding to particulates. In marine environments, oxidized forms of mercury may convert to the highly neurotoxic methylmercury organic species. Conventional mercury analysis techniques cannot determine the chemical forms of mercury present in the atmosphere only whether mercury is present as GEM, GOM or particulate forms. It is also not clear that what is measured as gaseous mercury is entirely gaseous but may be comprised of nano-particulate mercury. Nano-particulate mercury would have significantly different chemical, biologic and human health implications, and would fundamentally change how we model the fate of mercury in the atmosphere, its transformations and risks to ecosystems.In this work, we develop a technique to determine and measure the chemical speciation of atmospheric oxidized mercury using soft-ionization mass spectrometry, generate and characterize reproducible sources of oxidized mercury nanoparticles and assess the determine the gaseous and particulate contributions of mercury(II) bromide and mercury(II) chloride at pg/m3 concentrations in Montreal urban air. " --
Air Mercury Speciation Foliar Uptake And Wash Off Along An Urban Rural Gradient
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Author : Geoffrey W. Stupple
language : en
Publisher:
Release Date : 2009
Air Mercury Speciation Foliar Uptake And Wash Off Along An Urban Rural Gradient written by Geoffrey W. Stupple and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Mercury (Hg) is a contaminant of global concern due to its long-range atmospheric transport and high toxicity. The focus of this research is on the role of the forest canopy in the accumulation, and delivery of Hg to the soil Hg pool. Particular focus is on the role of atmospheric speciation of Hg on deposition. An urban-rural gradient was examined from Mississauga to Dorset, Ontario, to determine the role of locally emitted Hg: RGM, and PM on deposition. [GEM] was measured to be similar at both sites, and [PM] and [RGM] were greater in the urban location. Seasonal accumulation of Hg on foliar surfaces was dominated by GEM, and similar at the urban (8.74 ng cm -2) and rural (9.80 ng cm-2) locations. Increased [PM] and [RGM] at the urban location resulted in a transient upper canopy Hg pool, and throughfall enrichment at the urban site.
Mercury Fate And Transport In The Global Atmosphere
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Author : Nicola Pirrone
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-06-15
Mercury Fate And Transport In The Global Atmosphere written by Nicola Pirrone and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-06-15 with Science categories.
Mercury, primarily because of its existence and bioaccumulation as methylmercury in aquatic organisms, is a concern for the health of higher trophic level organisms, or to their consumers. This is the major factor driving current research in mercury globally and in environmental regulation, and is the driver for the current UNEP Global Partnership for Mercury Transport and Fate Research (UNEP F&T) initiative. The overall focus of the UNEP F&T report is to assess the relative importance of different processes/mechanisms affecting the transfer of mercury (Hg) from emission sources to aquatic and terrestrial receptors and provide possible source-receptor relationships. This transfer occurs through atmospheric transport, chemical transformations and subsequent deposition, and involves the intermittent recycling between reservoirs that occurs prior to ultimate removal of Hg from the atmosphere. Understanding the sources, the global Hg transport and fate, and the impact of human activity on the biosphere, requires improved knowledge of Hg movement and transformation in the atmosphere. An improved understanding of Hg emission sources, fate and transport is important if there is to be a focused and concerted effort to set priorities and goals for Hg emission management and reduction at the national, regional and global levels; and to develop and implement such policies and strategies. To achieve this, a series of coordinated scientific endeavors focused on the estimation of sources, measurement and validation of concentrations and processes, and modeling, coupled with interpretation of the results within a policy framework, is likely to be required.
Air Mercury Speciation Foliar Uptake And Wash Off Along An Urban Rural Gradient
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Author : Geoffrey Stupple
language : en
Publisher:
Release Date : 2009
Air Mercury Speciation Foliar Uptake And Wash Off Along An Urban Rural Gradient written by Geoffrey Stupple and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Pattern Of Atmospheric Mercury Speciation During Episodes Of Elevated Pm2 5 Levels In A Coastal City In The Yangtze River Delta China
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Author :
language : en
Publisher:
Release Date : 2016
Pattern Of Atmospheric Mercury Speciation During Episodes Of Elevated Pm2 5 Levels In A Coastal City In The Yangtze River Delta China written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Urban Airshed Watershed Impacts On The Terrestrial Flux And Atmospheric Speciation Of Mercury
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Author : Mark Christopher Gabriel
language : en
Publisher:
Release Date : 2005
Urban Airshed Watershed Impacts On The Terrestrial Flux And Atmospheric Speciation Of Mercury written by Mark Christopher Gabriel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Atmospheric Mercury Monitoring Analysis And Chemistry
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Author : James Cizdziel
language : en
Publisher: MDPI
Release Date : 2021-04-28
Atmospheric Mercury Monitoring Analysis And Chemistry written by James Cizdziel and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-04-28 with Science categories.
Mercury is a toxic global contaminant that is transported through the atmosphere, is deposited in terrestrial and aquatic ecosystems, and concentrates up the food chain, reaching levels that can harm both humans and wildlife. This book reports the latest findings describing the distribution, deposition, and measurement of this airborne pollutant as well as the human and environmental impacts of artisanal mining of mercury and gold. The research originates from around the world and highlights the importance of atmospheric mercury research and the Minamata Convention on Mercury, a global treaty to protect human health and the environment from anthropogenic emissions of mercury.
Hemispheric Transport Of Air Pollution 2010
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Author :
language : en
Publisher:
Release Date : 2010
Hemispheric Transport Of Air Pollution 2010 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Air categories.
The Task Force on Hemispheric Transport of Air Pollution (TF HTAP) was created by the Convention on Long-range Transboundary Air Pollution (LRTAP Convention) in December 2004 to improve the understanding of the intercontinental transport of air pollutants across the Northern Hemisphere. This multivolume assessment produced by the TF HTAP reviews the state-of-the-science with respect to the intercontinental transport of ozone (O3), particulate matter (PM), mercury (Hg), and persistent organic pollutants (POPs).