Mark A Engle (Former Employee)
Science and Products
Filter Total Items: 64
Tracking solutes and water from subsurface drip irrigation application of coalbed methane-produced waters, Powder River Basin, Wyoming
One method to beneficially use water produced from coalbed methane (CBM) extraction is subsurface drip irrigation (SDI) of croplands. In SDI systems, treated CBM water (injectate) is supplied to the soil at depth, with the purpose of preventing the buildup of detrimental salts near the surface. The technology is expanding within the Powder River Basin, but little research has been...
Authors
Mark A. Engle, Carleton R. Bern, Richard W. Healy, J.I. Sams, John W. Zupancic, K.T. Schroeder
Quantifying greenhouse gas emissions from coal fires using airborne and ground-based methods
Coal fires occur in all coal-bearing regions of the world and number, conservatively, in the thousands. These fires emit a variety of compounds including greenhouse gases. However, the magnitude of the contribution of combustion gases from coal fires to the environment is highly uncertain, because adequate data and methods for assessing emissions are lacking. This study demonstrates the...
Authors
Mark A. Engle, Lawrence F. Radke, Edward L. Heffern, Jennifer M.K. O'Keefe, Charles Smeltzer, James C. Hower, Judith M. Hower, Anupma Prakash, Allan Kolker, Robert J. Eatwell, Arnout ter Schure, Gerald Queen, Kerry L. Aggen, Glenn B. Stracher, Kevin R. Henke, Ricardo A. Olea, Yomayara Román-Colón
Comparison of atmospheric mercury speciation and deposition at nine sites across central and eastern North America
This study presents >5 cumulative years of tropospheric mercury (Hg) speciation measurements, over the period of 2003–2009, for eight sites in the central and eastern United States and one site in coastal Puerto Rico. The purpose of this research was to identify local and regional processes that impact Hg speciation and deposition (wet + dry) across a large swath of North America. Sites...
Authors
Mark A. Engle, Michael Tate, David Krabbenhoft, James J Schauer, Allan Kolker, James B. Shanley, Michael Bothner
Health effects of energy resources
Energy resources (coal, oil, and natural gas) are among the cornerstones of modern industrial society. The exploitation of these resources, however, is not without costs. Energy materials may contain harmful chemical substances that, if mobilized into air, water, or soil, can adversely impact human health and environmental quality. In order to address the issue of human exposure to toxic...
Authors
William H. Orem, Calin A. Tatu, Nikola Pavlovic, Joseph E. Bunnell, Allan Kolker, Mark A. Engle, Ben Stout
Patterns of mercury dispersion from local and regional emission sources, rural Central Wisconsin, USA
Simultaneous real-time changes in mercury (Hg) speciation-reactive gaseous Hg (RGM), elemental Hg (Hg??), and fine particulate Hg (Hg-PM2.5), were determined from June to November 2007, in ambient air at three locations in rural Central Wisconsin. Known Hg emission sources within the airshed of the monitoring sites include: 1) a 1114 megawatt (MW) coal-fired electric utility generating...
Authors
Allan Kolker, M.L. Olson, David Krabbenhoft, Michael Tate, Mark A. Engle
CO2, CO, and Hg emissions from the Truman Shepherd and Ruth Mullins coal fires, eastern Kentucky, USA
Carbon dioxide (CO2), carbon monoxide (CO), and mercury (Hg) emissions were quantified for two eastern Kentucky coal-seam fires, the Truman Shepherd fire in Floyd County and the Ruth Mullins fire in Perry County. This study is one of the first to estimate gas emissions from coal fires using field measurements at gas vents. The Truman Shepherd fire emissions are nearly 1400 t CO2/yr and...
Authors
Jennifer M.K. O'Keefe, Kevin R. Henke, James C. Hower, Mark A. Engle, Glenn B. Stracher, J.D. Stucker, Jordan W. Drew, Wayne D. Staggs, Tiffany M. Murray, Maxwell L. Hammond, Kenneth D. Adkins, Bailey J. Mullins, Edward W. Lemley
Emissions from coal fires and their impact on the environment
Self-ignited, naturally occurring coal fires and fires resulting from human activities persist for decades in underground coal mines, coal waste piles, and unmined coal beds. These uncontrolled coal fires occur in all coal-bearing parts of the world (Stracher, 2007) and pose multiple threats to the global environment because they emit greenhouse gases - carbon dioxide (CO2), and methane...
Authors
Allan Kolker, Mark A. Engle, Glenn B. Stracher, James C. Hower, Anupma Prakash, Lawrence F. Radke, Arnout ter Schure, Ed Heffern
Measuring CO2 emissions from coal fires in the U.S.
No abstract available.
Authors
Allan Kolker, Mark A. Engle, J.C. Hower, J.M.K. O'Keefe, L.F. Radke, E.L. Heffern, A. ter-Schure, Glenn B. Stracher, A. Prakash, Yomayara Román-Colón, Ricardo A. Olea
The Tiptop coal-mine fire, Kentucky: Preliminary investigation of the measurement of mercury and other hazardous gases from coal-fire gas vents
The Tiptop underground coal-mine fire in the Skyline coalbed of the Middle Pennsylvanian Breathitt Formation was investigated in rural northern Breathitt County, Kentucky, in May 2008 and January 2009, for the purpose of determining the concentrations of carbon dioxide (CO2), carbon monoxide (CO), and mercury (Hg) in the vent and for measuring gas-vent temperatures. At the time of our...
Authors
James C. Hower, Kevin R. Henke, Jennifer M.K. O'Keefe, Mark A. Engle, Donald R. Blake, Glenn B. Stracher
Summary of mercury and trace element results in precipitation from the Culpeper, Virginia, Mercury Deposition Network Site (VA-08), 2002-2006
The VA-08 Mercury Deposition Network (MDN) site, southwest of Culpeper, Virginia, was established in autumn of 2002. This site, along with nearby VA-28 (~31 km west) at Big Meadows in Shenandoah National Park, fills a spatial gap in the Mid-Atlantic region of the MDN network and provides Hg deposition data immediately west of the Washington, D.C., metropolitan area. Results for the...
Authors
Mark A. Engle, Allan Kolker, Douglas G. Mose, Joseph A. East, Jamey D. McCord
Mercury, trace elements and organic constituents in atmospheric fine particulate matter, Shenandoah National Park, Virginia, USA: A combined approach to sampling and analysis
Compliance with U.S. air quality regulatory standards for atmospheric fine particulate matter (PM2.5) is based on meeting average 24 hour (35 μ m−3) and yearly (15 μg m−3) mass‐per‐unit‐volume limits, regardless of PM2.5 composition. Whereas this presents a workable regulatory framework, information on particle composition is needed to assess the fate and transport of PM2.5 and determine...
Authors
Allan Kolker, Mark A. Engle, William H. Orem, J.E. Bunnell, H.E. Lerch, David Krabbenhoft, M.L. Olson, J.D. McCord
Application of environmental groundwater tracers at the Sulphur Bank Mercury Mine, California, USA
Boron, chloride, sulfate, ??D, ??18O, and 3H concentrations in surface water and groundwater samples from the Sulphur Bank Mercury Mine (SBMM), California, USA were used to examine geochemical processes and provide constraints on evaporation and groundwater flow. SBMM is an abandoned sulfur and mercury mine with an underlying hydrothermal system, adjacent to Clear Lake, California...
Authors
Mark A. Engle, F. Goff, D.G. Jewett, G.J. Reller, J.B. Bauman
Science and Products
Filter Total Items: 64
Tracking solutes and water from subsurface drip irrigation application of coalbed methane-produced waters, Powder River Basin, Wyoming
One method to beneficially use water produced from coalbed methane (CBM) extraction is subsurface drip irrigation (SDI) of croplands. In SDI systems, treated CBM water (injectate) is supplied to the soil at depth, with the purpose of preventing the buildup of detrimental salts near the surface. The technology is expanding within the Powder River Basin, but little research has been...
Authors
Mark A. Engle, Carleton R. Bern, Richard W. Healy, J.I. Sams, John W. Zupancic, K.T. Schroeder
Quantifying greenhouse gas emissions from coal fires using airborne and ground-based methods
Coal fires occur in all coal-bearing regions of the world and number, conservatively, in the thousands. These fires emit a variety of compounds including greenhouse gases. However, the magnitude of the contribution of combustion gases from coal fires to the environment is highly uncertain, because adequate data and methods for assessing emissions are lacking. This study demonstrates the...
Authors
Mark A. Engle, Lawrence F. Radke, Edward L. Heffern, Jennifer M.K. O'Keefe, Charles Smeltzer, James C. Hower, Judith M. Hower, Anupma Prakash, Allan Kolker, Robert J. Eatwell, Arnout ter Schure, Gerald Queen, Kerry L. Aggen, Glenn B. Stracher, Kevin R. Henke, Ricardo A. Olea, Yomayara Román-Colón
Comparison of atmospheric mercury speciation and deposition at nine sites across central and eastern North America
This study presents >5 cumulative years of tropospheric mercury (Hg) speciation measurements, over the period of 2003–2009, for eight sites in the central and eastern United States and one site in coastal Puerto Rico. The purpose of this research was to identify local and regional processes that impact Hg speciation and deposition (wet + dry) across a large swath of North America. Sites...
Authors
Mark A. Engle, Michael Tate, David Krabbenhoft, James J Schauer, Allan Kolker, James B. Shanley, Michael Bothner
Health effects of energy resources
Energy resources (coal, oil, and natural gas) are among the cornerstones of modern industrial society. The exploitation of these resources, however, is not without costs. Energy materials may contain harmful chemical substances that, if mobilized into air, water, or soil, can adversely impact human health and environmental quality. In order to address the issue of human exposure to toxic...
Authors
William H. Orem, Calin A. Tatu, Nikola Pavlovic, Joseph E. Bunnell, Allan Kolker, Mark A. Engle, Ben Stout
Patterns of mercury dispersion from local and regional emission sources, rural Central Wisconsin, USA
Simultaneous real-time changes in mercury (Hg) speciation-reactive gaseous Hg (RGM), elemental Hg (Hg??), and fine particulate Hg (Hg-PM2.5), were determined from June to November 2007, in ambient air at three locations in rural Central Wisconsin. Known Hg emission sources within the airshed of the monitoring sites include: 1) a 1114 megawatt (MW) coal-fired electric utility generating...
Authors
Allan Kolker, M.L. Olson, David Krabbenhoft, Michael Tate, Mark A. Engle
CO2, CO, and Hg emissions from the Truman Shepherd and Ruth Mullins coal fires, eastern Kentucky, USA
Carbon dioxide (CO2), carbon monoxide (CO), and mercury (Hg) emissions were quantified for two eastern Kentucky coal-seam fires, the Truman Shepherd fire in Floyd County and the Ruth Mullins fire in Perry County. This study is one of the first to estimate gas emissions from coal fires using field measurements at gas vents. The Truman Shepherd fire emissions are nearly 1400 t CO2/yr and...
Authors
Jennifer M.K. O'Keefe, Kevin R. Henke, James C. Hower, Mark A. Engle, Glenn B. Stracher, J.D. Stucker, Jordan W. Drew, Wayne D. Staggs, Tiffany M. Murray, Maxwell L. Hammond, Kenneth D. Adkins, Bailey J. Mullins, Edward W. Lemley
Emissions from coal fires and their impact on the environment
Self-ignited, naturally occurring coal fires and fires resulting from human activities persist for decades in underground coal mines, coal waste piles, and unmined coal beds. These uncontrolled coal fires occur in all coal-bearing parts of the world (Stracher, 2007) and pose multiple threats to the global environment because they emit greenhouse gases - carbon dioxide (CO2), and methane...
Authors
Allan Kolker, Mark A. Engle, Glenn B. Stracher, James C. Hower, Anupma Prakash, Lawrence F. Radke, Arnout ter Schure, Ed Heffern
Measuring CO2 emissions from coal fires in the U.S.
No abstract available.
Authors
Allan Kolker, Mark A. Engle, J.C. Hower, J.M.K. O'Keefe, L.F. Radke, E.L. Heffern, A. ter-Schure, Glenn B. Stracher, A. Prakash, Yomayara Román-Colón, Ricardo A. Olea
The Tiptop coal-mine fire, Kentucky: Preliminary investigation of the measurement of mercury and other hazardous gases from coal-fire gas vents
The Tiptop underground coal-mine fire in the Skyline coalbed of the Middle Pennsylvanian Breathitt Formation was investigated in rural northern Breathitt County, Kentucky, in May 2008 and January 2009, for the purpose of determining the concentrations of carbon dioxide (CO2), carbon monoxide (CO), and mercury (Hg) in the vent and for measuring gas-vent temperatures. At the time of our...
Authors
James C. Hower, Kevin R. Henke, Jennifer M.K. O'Keefe, Mark A. Engle, Donald R. Blake, Glenn B. Stracher
Summary of mercury and trace element results in precipitation from the Culpeper, Virginia, Mercury Deposition Network Site (VA-08), 2002-2006
The VA-08 Mercury Deposition Network (MDN) site, southwest of Culpeper, Virginia, was established in autumn of 2002. This site, along with nearby VA-28 (~31 km west) at Big Meadows in Shenandoah National Park, fills a spatial gap in the Mid-Atlantic region of the MDN network and provides Hg deposition data immediately west of the Washington, D.C., metropolitan area. Results for the...
Authors
Mark A. Engle, Allan Kolker, Douglas G. Mose, Joseph A. East, Jamey D. McCord
Mercury, trace elements and organic constituents in atmospheric fine particulate matter, Shenandoah National Park, Virginia, USA: A combined approach to sampling and analysis
Compliance with U.S. air quality regulatory standards for atmospheric fine particulate matter (PM2.5) is based on meeting average 24 hour (35 μ m−3) and yearly (15 μg m−3) mass‐per‐unit‐volume limits, regardless of PM2.5 composition. Whereas this presents a workable regulatory framework, information on particle composition is needed to assess the fate and transport of PM2.5 and determine...
Authors
Allan Kolker, Mark A. Engle, William H. Orem, J.E. Bunnell, H.E. Lerch, David Krabbenhoft, M.L. Olson, J.D. McCord
Application of environmental groundwater tracers at the Sulphur Bank Mercury Mine, California, USA
Boron, chloride, sulfate, ??D, ??18O, and 3H concentrations in surface water and groundwater samples from the Sulphur Bank Mercury Mine (SBMM), California, USA were used to examine geochemical processes and provide constraints on evaporation and groundwater flow. SBMM is an abandoned sulfur and mercury mine with an underlying hydrothermal system, adjacent to Clear Lake, California...
Authors
Mark A. Engle, F. Goff, D.G. Jewett, G.J. Reller, J.B. Bauman