Dr. David M. Borrok

Professor and Director
e-mail: dborrok@louisiana.edu;
phone: (337)482-2888;
Office: Hamilton Hall 316

Education:
B.S. Missouri Science and Technology (1995)
M.S. University of Michigan (1997)
Ph.D. University of Notre Dame (2005)

Research Interests:
low-temperature geochemistry, geomicrobiology, water quality and sustainability, and stable isotope geochemistry.

Publications:

Borrok, D.M., Engle, M.A. (in review) The role of climate in increasing salt loads in dryland rivers. Journal of Arid Environments.
Gray, J.E., Pribil, M.J., VanMetre, P.C., Borrok, D.M., Thapalia, A. (in review) Identification of anthropogenic contamination in a lake sediment core using Hg and Pb isotopic compositions, Lake Ballinger, Washington, USA. Applied Geochemistry.
Navarette, J., Cappelle, I., Schnittker, K., Borrok, D.M. (in revision) Bioleaching of ilmenite and basalt by iron-oxidizing and iron-scavenging bacteria. Geomicrobiology Journal.
Szynkiewicz, A., Modelska, M., Buczynski, S., Borrok, D.M., Merrison, J. (in review) The polar sulfur cycle in the Werenskioldbreen, Spitsbergen: Possible implications for understanding the deposition of sulfate minerals in the North Polar Region of Mars. Geochimica Cosmochimica Acta.
Borrok, D.M., Wanty, R.B. (2012) Isotopic compositions, International Innovation, Research Media, UK; p 74-76.
Szynkiewicz, A., Timmons, S., Newton, T., Borrok, D.M. (2012) The impact of sulfuric acid weathering of fractured carbonate aquifers in the southern Sacramento Mountains, New Mexico, USA. Applied Geochemistry, 27, 1451-1462.
Aranda, S., Borrok, D.M., Wanty, R.B., Balistrieri, L.S. (2012) Zn isotopes in surface and pore waters in a mountain watershed impacted by acid rock drainage. Science of the Total Environment, 420, 202-213.
Thapalia, A., Borrok, D.M., Nazarian, S., Garibay, J. (2011) Assessment of corrosion potential of coarse backfill aggregates for mechanically stabilized earth walls. Journal of the Transportation Research Board 2253, 63-72.
Navarrete, J., Borrok, D.M., Viveros, M., Ellzey, J. (2011) Fractionation of Cu isotopes during surface adsorption and intracellular incorporation by bacteria. Geochimica Cosmochimica Acta 75, 784-799.
Szynkiewicz, A., Witcher, J.C., Modelska, M., Borrok, D.M., Pratt, L.M. (2011) Anthropogenic sulphate loads in the Rio Grande, New Mexico (USA). Chemical Geology 283, 194-209.
Borrok, D.M., Gier�, R., Ren, M., Landa, E.R. (2010) Zinc isotopic composition of particulate matter generated during the combustion of coal and coal + tire-derived fuels. Environmental Science and Technology 44, 9219-9224.
Pribil, M.J., Wanty, R.B., Ridley, W.I., Borrok, D.M. (2010) Influence of sulphur-bearing polyatomic species on high-precision measurements of Cu isotopic composition. Chemical Geology 272, 49-54.
Del Toro, I., Floyd, K., Gardea-Torresdey, J., Borrok, D.M., (2010) Heavy metal distribution and bioaccumulation in Chihuahuan Desert Rough Harvester Ant (Pogonomyrmex rugosus) populations. Environmental Pollution 158, 1281-1287.
Thapalia, A., Borrok, D.M., Van Metre, P., Musgrove, M., Landa, E.R (2010) Zn and Cu isotopes as tracers of anthropogenic contamination in a sediment core from an urban lake. Environmental Science and Technology 44, 1544-1550.
Fernandez, A., Borrok, D.M. (2009) Fractionation of Cu, Fe, and Zn isotopes during the oxidative weathering of sulfide-rich rocks. Chemical Geology 264, 1-12.
Borrok, D.M., Wanty, R.B., Ridley, W.I., Lamothe, P.J., Kimball, B.A., Verplanck, P.L., Runkel, R. (2009) Investigating metal fluxes in a mountain watershed using iron and zinc isotopes. Applied Geochemistry 24, 1270-1277.
Borrok, D.M., Nimick, D.A., Wanty, R.B., Ridley, W.I. (2008) Isotopic variations of dissolved copper and zinc in stream waters affected by historical mining. Geochimica Cosmochimica Acta 72, 329-344.
Balistrieri, L., Borrok, D.M., Wanty, R.B., Ridley, W.I (2008) Fractionation of Cu and Zn isotopes during adsorption onto amorphous Fe(III)-oxides: Experimental mixing of acid rock drainage and pristine river waters. Geochimica et Cosmochimica Acta 72, 311-328.
Borrok D.M., Wanty, R.B., Ridley, W.I., Wolf, R., Lamothe, P.J., Adams, M (2007) Separation of copper, iron, and zinc from complex aqueous solutions for isotopic measurement. Chemical Geology 242, 400-414. (this was a top 50 most-cited article for the last 5 years)
Borrok, D.M., Aumend, K., Fein, J.B. (2007) Significance of ternary bacteria-metal-NOM complexes determined through experimentation and chemical equilibrium modeling. Chemical Geology 238, 44-62.
Johnson, K.J., Szymanowski, J.E.S., Borrok, D., Huynh, T.Q., Fein, J.B. (2007) Proton and metal adsorption onto bacterial consortia: Stability constants for metal-bacterial surface complexes. Chemical Geology, 238, 44-62.
Harper, D., Borrok, D.M. (2007) Dolomite fronts and associated zinc-lead mineralization, USA. Economic Geology 102, 1345-1352.
Borrok, D.M., Turner B.F., Fein, J.B. (2006) A universal surface complexation framework for modeling proton binding onto bacterial surfaces in geologic settings. American Journal of Science 305, 826-853.
Borrok, D., Borrok M.J., Fein J.B., and Kiessling L.L. (2005) Environmental control and prediction of bacterial chemotactic responses. Environmental Science and Technology, 39, 5227-5233.
Borrok, D.M., Fein, J.B. (2005) The impact of ionic strength on the adsorption of protons, Pb, Cd, and Sr onto the surfaces of Gram negative bacteria: Testing non-electrostatic, diffuse, and triple layer models. Journal of Colloid and Interface Science 286, 110-126.
Borrok, D.M., Fein, J.B. (2004) The distribution of protons and Cd between bacterial surfaces and dissolved humic substances determined through chemical equilibrium modeling. Geochimica et Cosmochimica Acta 68, 3043-3052.
Borrok, D., Fein, J.B., and Kulpa, C.F. (2004) Cd and proton adsorption onto bacterial consortia grown from industrial wastes and contaminated geologic settings. Environmental Science and Technology, 38, 5656-5664.
Borrok, D., Fein, J.B., Tischler, M., O’Loughlin, E., Meyer, H., Liss, M., and Kemner, K. (2004) The effect of acidic solutions and growth conditions on the adsorptive properties of bacterial surfaces. Chemical Geology, 207, 107-119.
Borrok, D., Fein, J.B., and Kulpa, C.F. (2004) Proton and Cd adsorption onto natural bacterial consortia: Testing universal adsorption behavior. Geochimica et Cosmochimica Acta, 68, 3231-3238.
Borrok, D., Kesler, S.E, and Vogel, T.A. (1999) Sulfide minerals in intrusive and volcanic rocks of the Bingham-Park City Belt, Utah. Economic Geology, 94, 1213-1231.
Borrok, D., and Kesler, S.E. (1998) The Vergenoeg magnetite-fluorite deposit, South Africa: Support for a hydrothermal model for massive iron oxide deposits. Economic Geology, 93, 564-587.