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Records 1 to 25 of 1622 records about 'mercury'

In Situ BioTransformation of Mercury-Contaminated Groundwater In Kazakhstan Utilizing Native Bacteria (Presentation)
(PRESENTATION) [Presented : May 21, 2008]
The Northern outskirts of Pavlodar were contaminated with mercury as a result of activity at the former PO "Khimprom" chemical plant. The plant produced chlorine and alkali from the 1970's into the 1990's using the electrolytic amalgam method entailing the use of massive amounts...
Mercury Exposure Affects the Reproductive Success of a Free-living Terrestrial Songbird, the Carolina Wren, (Thryothrus ludovicianus)
(JOURNAL) [Published : Oct 01, 2011]
The impacts of mercury contamination on aquatic-feeding wildlife are well-established, but recent attention has focused on the effects of mercury on species in terrestrial ecosystems. Despite mounting evidence of mercury accumulation in terrestrial ecosystems, there is little dat...
In situ BioTransformation Of Mercury-Contaminated Groundwater In Kazakhstan Utilizing Native Bacteria
(PRESENTATION) [Presented : May 20, 2008]
The Northern outskirts of Pavlodar were contaminated with mercury as a result of activity at the former PO "Khimprom" chemical plant. The plant produced chlorine and alkali from the 1970s into the 1990s using the electrolytic amalgam method entailing the use of massive amounts o...
A CRITICAL ASSESSMENT OF ELEMENTAL MERCURY AIR/WATER EXCHANGE PARTNERS
(JOURNAL) [Published : Nov 15, 2004]
Although evasion of elemental mercury from aquatic systems can significantly deplete net mercury accumulation resulting from atmospheric deposition, the current ability to model elemental mercury air/water exchange is limited by uncertainties in our understanding of all gaseous a...
A MODELLING FRAMEWORK FOR MERCURY CYCLING IN LAKE MICHIGAN
(PRESENTATION) [Presented : May 21, 2000]
A time-dependent mercury model was developed to describe mercury cycling in Lake Michigan. The model addresses dynamic relationships between net mercury loadings and the resulting concentrations of mercury species in the water and sediment. The simplified predictive modeling fram...
A MODELLING FRAMEWORK FOR MERCURY CYCLING IN LAKE MICHIGAN
(PRESENTATION) [Presented : Aug 06, 2000]
A time dependent mercury model was developed to describe mercury cycling in Lake Michigan. The model addresses dynamic relationships between net mercury loadings and the resulting concentrations of mercury species in the water and sediment. The transformations among three mercury...
A Mercury Transport and Fate Model for Mass Budget Assessment of Mercury Cycling in Lake Michigan
(PRESENTATION) [Presented : May 18, 2009]
A mercury mass balance model was developed to describe and evaluate the fate, transport, and biogeochemical transformations of mercury in Lake Michigan. Coupling with total suspendable solids (TSS) and dissolved organic carbon (DOC), the mercury transport and fate model simulates...
A New Approach to Numerical Simulation of the Global Mercury Cycle Based on the Model for Prediction Across Scales
(PRESENTATION) [Presented : Sep 13, 2019]
It is well known that mercury (Hg) cycles through air, water and soil on a global scale. Global-scale modeling of atmospheric Hg has encountered challenges. Relatively coarse spatial discretization is needed to achieve global coverage without incurring excessive computational c...
A mercury transport and fate model (LM2-mercury) for mass budget assessment of mercury cycling in Lake Michigan
(JOURNAL) [Published : Jun 01, 2014]
LM2-Mercury, a mercury mass balance model, was developed to simulate and evaluate the transport, fate, and biogeochemical transformations of mercury in Lake Michigan. The model simulates total suspended solids (TSS), disolved organic carbon (DOC), and total, elemental, divalent, ...
A multi-stable isotope approach to determine mercury sources to St. Louis River fishes
(PRESENTATION) [Presented : Feb 27, 2019]
Mercury (Hg) contamination in the Great Lakes region is a prevalent concern due to elevated Hg concentrations in fish in relation to human health and wildlife guidelines. The lower St. Louis River, the largest tributary to Lake Superior, exhibits fish Hg concentrations twice that...
A multiple stable isotope approach to determine how fish life-history effects mercury bioaccumulation
(PRESENTATION) [Presented : Nov 19, 2020]
In the St. Louis River Area of Concern, an important natural resource management goal is to reduce or eliminate fish consumption advisories by remediating contaminated sediments and restoring aquatic habitat. One of the two contaminants of concern is mercury, derived from histori...
ACTIVITIES TO CONTAIN MERCURY POLLUTION FROM ENTERING THE RIVER IRTYSH IN PAVLODAR, KAZAKHSTAN
(PRESENTATION) [Presented : Aug 08, 2006]
This paper describes a research and implementation program to cost effectively contain mercury pollution from a former chlor-alkali plant at Pavlodar, Kazakhstan. It has been estimated that about 1300 tons of mercury were lost into the environment. The primary source of pollutio...
ADVANCES IN ENCAPSULATION TECHNOLOGIES FOR THE MANAGEMENT OF MERCURY CONTAMINATED HAZARDOUS WASTES
(JOURNAL) [Published : Oct 18, 2004]
Although industrial and commercial uses of mercury have been curtailed in recent times, there is a demonstrated need for the development of reliable hazardous waste management techniques because of historic operations that have led to significant contamination and ongoing hazardo...
ADVANCES IN ENCAPSULATION TECHNOLOGIES FOR THE MANAGEMENT OF MERCURY-CONTAMINATED HAZARDOUS WASTES
(PUBLISHED REPORT) [Published : Jan 01, 2003]
Although industrial and commercial uses of mercury have been curtailed in recent times, there is a demonstrated need for the development of reliable hazardous waste management techniques because of ongoing hazardous waste generation and historic operations that have led to signif...
AIRBORNE MERCURY DEPOSITION AND WATERSHED CHARACTERISTICS IN RELATION TO MERCURY CONCENTRATIONS IN WATER, SEDIMENTS, PLANKTON, AND FISH OF EIGHTY NORTHERN MINNESOTA LAKES
[Published : May 24, 2002]
In light of increasing fish consumption advisories in several states, a comprehensive multimedia database was created to answer a variety of questions. Mercury concentrations in precipitation, lake water and sediment, zooplankton, and fish were measured and analyzed together with...
AN ELECTROCHEMICAL SYSTEM FOR REMOVING AND RECOVERING ELEMENTAL MERCURY FROM FLUE-STACK GASES
(JOURNAL) [Published : Oct 15, 2002]
the impending EPA regulations on the control of mercury emissions from the flue stacks of coal-burning electric utilities has resulted in heightened interest in the development of advanced mercury control technologies such as sorbent injection and in-situ mercury oxidation. Altho...
AN ENVIRONMENTAL TECHNOLOGY VERIFICATION (ETV) TESTING OF FOUR MERCURY EMISSION SAMPLING SYSTEMS
(ETV DOCUMENT) [Published : May 07, 2007]
CEMs - Tekran Instrument Corp. Series 3300 and Thermo Electron's Mercury Freedom System Continuous Emission Monitors (CEMs) for mercury are designed to determine total and/or chemically speciated vapor-phase mercury in combustion emissions. Performance for mercury CEMs are cont...
AN INTEGRATED ANALYSIS OF THE POTENTIAL EFFECTIVENESS OF MERCURY EMISSION REDUCTION STRATEGIES IN THE GREAT LAKES
(PRESENTATION) [Presented : Sep 23, 2003]
Using atmospheric transport and fate models, it has been possible to link the changes in emissions to to the change in atmospheric deposition for the last thirty years for the criteria air pollutants, but it has only been in the last decade that advances have been made to allow t...
AN OVERVIEW: DECISION-MAKING FRAMEWORK FOR THE ANALYSIS OF ALTERNATIVES FOR THE LONG TERM MANAGEMENT OF MERCURY
(PRESENTATION) [Presented : Jun 19, 2002]
Over the past decade, the Environmental Protection Agency (EPA) has promoted the use of alternatives to mercury because it is a persistent, bio-accumulative, and toxic (PBT) chemical. The Agency's long-term goal for mercury is the elimination of mercury released to the air, wate...
ANALYSIS OF ALTERNATIVES FOR THE LONG TERM MANAGEMENT OF EXCESS MERCURY
(PRESENTATION) [Presented : Jun 29, 2004]
This paper describes a systematic method for comparing options for the long-term management of surplus elemental mercury in the U.S., using the Analytic Hierarchy Process (AHP) as embodied in commercially available Expert Choice software. A limited scope multi-criteria decisionan...
ANALYSIS OF MERCURY IN VERMONT AND NEW HAMPSHIRE LAKES: EVALUATION OF THE REGIONAL MERCURY CYCLING MODEL
(PUBLISHED REPORT) [Published : Sep 30, 2004]
An evaluation of the Regional Mercury Cycling Model (R-MCM, a steady-state fate and transport model used to simulate mercury concentrations in lakes) is presented based on its application to a series of 91 lakes in Vermont and New Hampshire. Visual and statistical analyses are pr...
APPROACHES TO ECOSYSTEM AND HUMAN EXPOSURE TO MERCURY FOR SENSITIVE POPULATIONS
(PRESENTATION) [Presented : Sep 02, 2006]
Both human and ecosystem exposure studies evaluate exposure of sensitive and vulnerable populations. We will discuss how ecosystem exposure modeling studies completed for input into the US Clean Air Mercury Rule (CAMR) to evaluate the response of aquatic ecosystems to changes in ...
ASSESSING AND MANAGING MERCURY FROM HISTORIC AND CURRENT MINING ACTIVITIES
(PUBLISHED REPORT) [Published : Mar 25, 2005]
In order for ORD to address uncertainties resulting from past or historical mining practices a technology transfer workshop was conducted in November, 2000 in San Francisco, CA. Two primary objectives for this workshop were: 1) identify state-of-the-science practices and techniqu...
ASSESSMENT OF MERCURY POLLUTION TO THE IRTYSH RIVER IN PAVLODAR, KAZAKHSTAN
(PRESENTATION) [Presented : Nov 02, 2005]
The threat of polluting the river Irtysh by mercury was caused by high losses of Hg during 1975-1993 during chlor-alkali production at the former PO "Khimprom", Pavlodar, North-East Kazakhstan (at present JSC "Pavlodar Chemical Plant"). These losses were the highest among simila...
ATMOSPHERIC MERCURY BEHAVIOR AT DIFFERENT ALTITUDES AT NY-ALESUND DURING SPRING 2003
(JOURNAL) [Published : Dec 01, 2005]
Intensive field measurements of atmospheric mercury and related species were carried out in Ny Alesund, Spitsbergen during the spring of 2003 at two altitudes. Measurements were made at the Italian research station Dirigibile Italia (12m a.s.l.) and on the top of Zeppelin Mountai...