Allan Kolker (Former Employee)
Science and Products
Filter Total Items: 51
Potentially hazardous elements in coal: Modes of occurrence and summary of concentration data for coal components
Mode-of-occurrence data are summarized for 13 potentially hazardous elements (Be, Cr, Mn, Co, Ni, As, Se, Cd, Sb, Hg, Pb, Th, U) in coal. Recent work has refined mode-of-occurrence data for Ni, Cr, and As, as compared to previous summaries. For Cr, dominant modes of occurrence include the clay mineral iliite, an amorphous CrO(OH) phase, and Cr-bearing spinels. Nickel is present in Fe-sulfides (pyr
Authors
Allan Kolker, Robert B. Finkelman
Modes of occurrence of trace elements in samples from a coal cleaning plant
No abstract available.
Authors
Curtis A. Palmer, Allan Kolker, Robert B. Finkelman, K.C. Kolb, Stanley J. Mroczkowski, S.S. Crowley, H. E. Belkin, J. H. Bullock, J.M. Motooka
Mineralogy and geochemistry of Fe-Ti oxide and apatite (nelsonite) deposits and evaluation of the liquid immiscibility hypothesis.
Modal mineralogy determined for 32 Fe-Ti oxide and apatite rocks from localities in Virginia, New York, Quebec, Norway, and Sweden largely supports the 2:1 oxide:apatite ratio suggested as a eutectic mixture by Philpotts (1967). A fairly consistent suite of accessory minerals, including biotite, clinoamphibole, spinel, zircon, and sulfides, is present. Some silicate accessory minerals tend to form
Authors
A. Kolker
Non-USGS Publications**
Huggins, F. E., Huffman, G. P., Kolker, Allan, Mroczkowski, S. J., Palmer, C. A., and Finkelman, R. B., 2002, Combined application of XAFS spectroscopy and sequential leaching for determination of arsenic speciation in coal: Energy and Fuels, v. 16, no. 5, p. 1167-1172.
Bunnell, J. E., Garcia, L. V., Furst, J. M., Lerch, Harry, Olea, R.A., Suitt, S.E., and Kolker, Allan, 2010, Navajo coal combustion and respiratory health near Shiprock, New Mexico: Journal of Environmental and Public Health, v. 2010, #260525, 14 p.
Engle, Mark A., Radke, Lawrence F., Heffern, Edward L., O’Keefe, Jennifer M.K., Hower, James C., Smeltzer, Charles D., Hower, Judith M, Olea, Ricardo A., Eatwell, Robert J., Blake, Donald R., Emsbo-Mattingly, Stephen D., Stout, Scott A., Queen, Gerald, Aggen, Kerry L., Kolker, Allan, Prakash, Anupma, Henke, Kevin R., Stracher, Glenn B., Schroeder, Paul A., Román-Colón, Yomayra, and ter Schure, Arnout, 2012, Gas emissions, minerals, and tars associated with three coal fires, Powder River Basin, USA: Science of the Total Environment, v. 420, p. 146-159.
Kolker, Allan, Engle, Mark A., Peuker-Ehrenbrink, Bernhard, Geboy, N. J., Krabbenhoft, D.P., Bothner, M.H., and Tate, M.T., Atmospheric mercury and fine particulate matter at Woods Hole, Cape Cod, MA: Implications for mercury and trace element sources in the northeastern U.S.: Atmospheric Environment, v. 79, p. 760-768.
Kolker, Allan, and Quick, Jeffrey C., 2015, Mercury and halogens in coal, in, Granite, E., Senior, C., and Pennline, H., eds., Mercury control for coal-derived gas steams, Wiley-VCH, p. 13-44.
Kolker, Allan, 2016, Mercury in U.S. Coal- Priorities for New USGS Studies: U.S. Geological Survey Open File Report, in press.
Deonarine, A., Kolker, A., Doughten, M., Bailoo, J.D., and Holland, J.T., Arsenic speciation in bituminous coal fly ash and transformations in response to redox conditions: Submitted to Environmental Science and Technology.
Deonarine, A., Kolker, A., Doughten, M., Bailoo, J.D., and Holland, J.T., Arsenic speciation in bituminous coal fly ash and transformations in response to redox conditions: Submitted to Environmental Science and Technology.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 51
Potentially hazardous elements in coal: Modes of occurrence and summary of concentration data for coal components
Mode-of-occurrence data are summarized for 13 potentially hazardous elements (Be, Cr, Mn, Co, Ni, As, Se, Cd, Sb, Hg, Pb, Th, U) in coal. Recent work has refined mode-of-occurrence data for Ni, Cr, and As, as compared to previous summaries. For Cr, dominant modes of occurrence include the clay mineral iliite, an amorphous CrO(OH) phase, and Cr-bearing spinels. Nickel is present in Fe-sulfides (pyr
Authors
Allan Kolker, Robert B. Finkelman
Modes of occurrence of trace elements in samples from a coal cleaning plant
No abstract available.
Authors
Curtis A. Palmer, Allan Kolker, Robert B. Finkelman, K.C. Kolb, Stanley J. Mroczkowski, S.S. Crowley, H. E. Belkin, J. H. Bullock, J.M. Motooka
Mineralogy and geochemistry of Fe-Ti oxide and apatite (nelsonite) deposits and evaluation of the liquid immiscibility hypothesis.
Modal mineralogy determined for 32 Fe-Ti oxide and apatite rocks from localities in Virginia, New York, Quebec, Norway, and Sweden largely supports the 2:1 oxide:apatite ratio suggested as a eutectic mixture by Philpotts (1967). A fairly consistent suite of accessory minerals, including biotite, clinoamphibole, spinel, zircon, and sulfides, is present. Some silicate accessory minerals tend to form
Authors
A. Kolker
Non-USGS Publications**
Huggins, F. E., Huffman, G. P., Kolker, Allan, Mroczkowski, S. J., Palmer, C. A., and Finkelman, R. B., 2002, Combined application of XAFS spectroscopy and sequential leaching for determination of arsenic speciation in coal: Energy and Fuels, v. 16, no. 5, p. 1167-1172.
Bunnell, J. E., Garcia, L. V., Furst, J. M., Lerch, Harry, Olea, R.A., Suitt, S.E., and Kolker, Allan, 2010, Navajo coal combustion and respiratory health near Shiprock, New Mexico: Journal of Environmental and Public Health, v. 2010, #260525, 14 p.
Engle, Mark A., Radke, Lawrence F., Heffern, Edward L., O’Keefe, Jennifer M.K., Hower, James C., Smeltzer, Charles D., Hower, Judith M, Olea, Ricardo A., Eatwell, Robert J., Blake, Donald R., Emsbo-Mattingly, Stephen D., Stout, Scott A., Queen, Gerald, Aggen, Kerry L., Kolker, Allan, Prakash, Anupma, Henke, Kevin R., Stracher, Glenn B., Schroeder, Paul A., Román-Colón, Yomayra, and ter Schure, Arnout, 2012, Gas emissions, minerals, and tars associated with three coal fires, Powder River Basin, USA: Science of the Total Environment, v. 420, p. 146-159.
Kolker, Allan, Engle, Mark A., Peuker-Ehrenbrink, Bernhard, Geboy, N. J., Krabbenhoft, D.P., Bothner, M.H., and Tate, M.T., Atmospheric mercury and fine particulate matter at Woods Hole, Cape Cod, MA: Implications for mercury and trace element sources in the northeastern U.S.: Atmospheric Environment, v. 79, p. 760-768.
Kolker, Allan, and Quick, Jeffrey C., 2015, Mercury and halogens in coal, in, Granite, E., Senior, C., and Pennline, H., eds., Mercury control for coal-derived gas steams, Wiley-VCH, p. 13-44.
Kolker, Allan, 2016, Mercury in U.S. Coal- Priorities for New USGS Studies: U.S. Geological Survey Open File Report, in press.
Deonarine, A., Kolker, A., Doughten, M., Bailoo, J.D., and Holland, J.T., Arsenic speciation in bituminous coal fly ash and transformations in response to redox conditions: Submitted to Environmental Science and Technology.
Deonarine, A., Kolker, A., Doughten, M., Bailoo, J.D., and Holland, J.T., Arsenic speciation in bituminous coal fly ash and transformations in response to redox conditions: Submitted to Environmental Science and Technology.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.