Mark A Engle (Former Employee)
Science and Products
Filter Total Items: 64
Shallow groundwater and soil chemistry response to 3 years of subsurface drip irrigation using coalbed-methane-produced water Shallow groundwater and soil chemistry response to 3 years of subsurface drip irrigation using coalbed-methane-produced water
Disposal of produced waters, pumped to the surface as part of coalbed methane (CBM) development, is a significant environmental issue in the Wyoming portion of the Powder River Basin, USA. High sodium adsorption ratios (SAR) of the waters could degrade agricultural land, especially if directly applied to the soil surface. One method of disposing of CBM water, while deriving beneficial...
Authors
Carleton R. Bern, Adam R. Boehlke, Mark A. Engle, Nicholas J. Geboy, K.T. Schroeder, J.W. Zupancic
Low salinity hydrocarbon water disposal through deep subsurface drip irrigation: leaching of native selenium Low salinity hydrocarbon water disposal through deep subsurface drip irrigation: leaching of native selenium
A subsurface drip irrigation system is being used in Wyoming’s Powder River Basin that treats high sodium, low salinity, coal bed methane (CBM) produced water with sulfuric acid and injects it into cropped fields at a depth of 0.92 m. Dissolution of native gypsum releases calcium that combats soil degradation that would otherwise result from high sodium water. Native selenium is leached...
Authors
Carleton R. Bern, Mark A. Engle, Adam R. Boehlke, John W. Zupancic
Discharges of produced waters from oil and gas extraction via wastewater treatment plants are sources of disinfection by-products to receiving streams Discharges of produced waters from oil and gas extraction via wastewater treatment plants are sources of disinfection by-products to receiving streams
Fluids co-produced with oil and gas production (produced waters) are often brines that contain elevated concentrations of bromide. Bromide is an important precursor of several toxic disinfection by-products (DBPs) and the treatment of produced water may lead to more brominated DBPs. To determine if wastewater treatment plants that accept produced waters discharge greater amounts of...
Authors
Michelle Hladik, Michael J. Focazio, Mark Engle
Atmospheric mercury and fine particulate matter in coastal New England: implications for mercury and trace element sources in the northeastern United States Atmospheric mercury and fine particulate matter in coastal New England: implications for mercury and trace element sources in the northeastern United States
Intensive sampling of ambient atmospheric fine particulate matter was conducted at Woods Hole, Massachusetts over a four-month period from 3 April to 29 July, 2008, in conjunction with year-long deployment of the USGS Mobile Mercury Lab. Results were obtained for trace elements in fine particulate matter concurrently with determination of ambient atmospheric mercury speciation and...
Authors
Allan Kolker, Mark A. Engle, Bernhard Peucker-Ehrenbrink, Nicholas J. Geboy, David P. Krabbenhotft, Michael H. Bothner, Michael T. Tate
Partitioning of selected trace elements in coal combustion products from two coal-burning power plants in the United States Partitioning of selected trace elements in coal combustion products from two coal-burning power plants in the United States
Samples of feed coal (FC), bottom ash (BA), economizer fly ash (EFA), and fly ash (FA) were collected from power plants in the Central Appalachian basin and Colorado Plateau to determine the partitioning of As, Cr, Hg, Pb, and Se in coal combustion products (CCPs). The Appalachian plant burns a high-sulfur (about 3.9 wt.%) bituminous coal from the Upper Pennsylvanian Pittsburgh coal bed...
Authors
Sharon M. Swanson, Mark A. Engle, Leslie F. Ruppert, Ronald H. Affolter, Kevin B. Jones
Direct estimation of diffuse gaseous emissions from coal fires: current methods and future directions Direct estimation of diffuse gaseous emissions from coal fires: current methods and future directions
Coal fires occur in nature spontaneously, contribute to increases in greenhouse gases, and emit atmospheric toxicants. Increasing interest in quantifying coal fire emissions has resulted in the adaptation and development of specialized approaches and adoption of numerical modeling techniques. Overview of these methods for direct estimation of diffuse gas emissions from coal fires is...
Authors
Mark A. Engle, Ricardo A. Olea, Jennifer M. K. O’Keefe, James C. Hower, Nicholas J. Geboy
Science and Products
Filter Total Items: 64
Shallow groundwater and soil chemistry response to 3 years of subsurface drip irrigation using coalbed-methane-produced water Shallow groundwater and soil chemistry response to 3 years of subsurface drip irrigation using coalbed-methane-produced water
Disposal of produced waters, pumped to the surface as part of coalbed methane (CBM) development, is a significant environmental issue in the Wyoming portion of the Powder River Basin, USA. High sodium adsorption ratios (SAR) of the waters could degrade agricultural land, especially if directly applied to the soil surface. One method of disposing of CBM water, while deriving beneficial...
Authors
Carleton R. Bern, Adam R. Boehlke, Mark A. Engle, Nicholas J. Geboy, K.T. Schroeder, J.W. Zupancic
Low salinity hydrocarbon water disposal through deep subsurface drip irrigation: leaching of native selenium Low salinity hydrocarbon water disposal through deep subsurface drip irrigation: leaching of native selenium
A subsurface drip irrigation system is being used in Wyoming’s Powder River Basin that treats high sodium, low salinity, coal bed methane (CBM) produced water with sulfuric acid and injects it into cropped fields at a depth of 0.92 m. Dissolution of native gypsum releases calcium that combats soil degradation that would otherwise result from high sodium water. Native selenium is leached...
Authors
Carleton R. Bern, Mark A. Engle, Adam R. Boehlke, John W. Zupancic
Discharges of produced waters from oil and gas extraction via wastewater treatment plants are sources of disinfection by-products to receiving streams Discharges of produced waters from oil and gas extraction via wastewater treatment plants are sources of disinfection by-products to receiving streams
Fluids co-produced with oil and gas production (produced waters) are often brines that contain elevated concentrations of bromide. Bromide is an important precursor of several toxic disinfection by-products (DBPs) and the treatment of produced water may lead to more brominated DBPs. To determine if wastewater treatment plants that accept produced waters discharge greater amounts of...
Authors
Michelle Hladik, Michael J. Focazio, Mark Engle
Atmospheric mercury and fine particulate matter in coastal New England: implications for mercury and trace element sources in the northeastern United States Atmospheric mercury and fine particulate matter in coastal New England: implications for mercury and trace element sources in the northeastern United States
Intensive sampling of ambient atmospheric fine particulate matter was conducted at Woods Hole, Massachusetts over a four-month period from 3 April to 29 July, 2008, in conjunction with year-long deployment of the USGS Mobile Mercury Lab. Results were obtained for trace elements in fine particulate matter concurrently with determination of ambient atmospheric mercury speciation and...
Authors
Allan Kolker, Mark A. Engle, Bernhard Peucker-Ehrenbrink, Nicholas J. Geboy, David P. Krabbenhotft, Michael H. Bothner, Michael T. Tate
Partitioning of selected trace elements in coal combustion products from two coal-burning power plants in the United States Partitioning of selected trace elements in coal combustion products from two coal-burning power plants in the United States
Samples of feed coal (FC), bottom ash (BA), economizer fly ash (EFA), and fly ash (FA) were collected from power plants in the Central Appalachian basin and Colorado Plateau to determine the partitioning of As, Cr, Hg, Pb, and Se in coal combustion products (CCPs). The Appalachian plant burns a high-sulfur (about 3.9 wt.%) bituminous coal from the Upper Pennsylvanian Pittsburgh coal bed...
Authors
Sharon M. Swanson, Mark A. Engle, Leslie F. Ruppert, Ronald H. Affolter, Kevin B. Jones
Direct estimation of diffuse gaseous emissions from coal fires: current methods and future directions Direct estimation of diffuse gaseous emissions from coal fires: current methods and future directions
Coal fires occur in nature spontaneously, contribute to increases in greenhouse gases, and emit atmospheric toxicants. Increasing interest in quantifying coal fire emissions has resulted in the adaptation and development of specialized approaches and adoption of numerical modeling techniques. Overview of these methods for direct estimation of diffuse gas emissions from coal fires is...
Authors
Mark A. Engle, Ricardo A. Olea, Jennifer M. K. O’Keefe, James C. Hower, Nicholas J. Geboy