Search Results - "Kirk Nordstrom, D."

Hydrogeochemical processes governing the origin, transport and fate of major and trace elements from mine wastes and mineralized rock to surface waters by Nordstrom, D. Kirk

“…► Hydrogeochemistry of mines and mineralized areas is complex. ► Mass balances and saturation indices add insight and organization to acid rock drainage data…”
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Worldwide Occurrences of Arsenic in Ground Water by Nordstrom, D. Kirk

“…As the world population increases beyond 6 billion, one of the most fundamental resources for human survival, clean water, is decreasing. Numerous occurrences…”
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Flying Blind: Geochemical Modeling and Thermodynamic Data Files by Zhu, Chen, Nordstrom, D. Kirk

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Rising arsenic concentrations from dewatering a geothermally influenced aquifer in central Mexico by Knappett, Peter S.K., Li, Yanmei, Loza, Isidro, Hernandez, Horacio, Avilés, Manuel, Haaf, David, Majumder, Santanu, Huang, Yibin, Lynch, Brian, Piña, Viridiana, Wang, Jianjun, Winkel, Lenny, Mahlknecht, Jürgen, Datta, Saugata, Thurston, William, Terrell, Dylan, Kirk Nordstrom, D.

“…•As concentrations compared across inter-montane aquifer system over 17 years.•30% of 137 wells exceeded baseline, neighborhood concentrations by >10 µg/L.•In…”
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Models, validation, and applied geochemistry: Issues in science, communication, and philosophy by Kirk Nordstrom, D.

“…Models have become so fashionable that many scientists and engineers cannot imagine working without them. The predominant use of computer codes to execute…”
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Thioarsenates in Geothermal Waters of Yellowstone National Park:  Determination, Preservation, and Geochemical Importance by Planer-Friedrich, Britta, London, Jacqueline, McCleskey, R. Blaine, Nordstrom, D. Kirk, Wallschläger, Dirk

“…Mono-, di-, tri-, and tetrathioarsenate, as well as methylated arsenic oxy- and thioanions, were determined besides arsenite and arsenate in geothermal waters…”
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Sulfur geochemistry of hydrothermal waters in Yellowstone National Park: IV Acid–sulfate waters by Kirk Nordstrom, D., Blaine McCleskey, R., Ball, James W.

“…Many waters sampled in Yellowstone National Park, both high-temperature (30–94 °C) and low-temperature (0–30 °C), are acid–sulfate type with pH values of 1–5…”
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Towards understanding the puzzling lack of acid geothermal springs in Tibet (China): Insight from a comparison with Yellowstone (USA) and some active volcanic hydrothermal systems by Guo, Qinghai, Kirk Nordstrom, D., Blaine McCleskey, R.

“…Explanations for the lack of acid geothermal springs in Tibet are inferred from a comprehensive hydrochemical comparison of Tibetan geothermal waters with…”
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Fluoride in thermal and non-thermal groundwater: Insights from geochemical modeling by Nordstrom, D. Kirk

“…High fluoride (F) groundwaters (>1 mg/L) have been recognized as a water quality problem for nearly a century and occur in many countries worldwide. The…”
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Geochemical modelling for mine site characterization and remediation by Nordstrom, D. Kirk

“…Although substantial advances in geochemical modelling have improved our ability to understand and improve mine site characterization and remediation, the…”
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Simultaneous oxidation of arsenic and antimony at low and circumneutral pH, with and without microbial catalysis by Asta, Maria P., Kirk Nordstrom, D., Blaine McCleskey, R.

“…► At circumneutral pH As and Sb oxidation was catalyzed by microbes. ► At acid pH As and Sb are oxidized abiotically by Fe(III). ► At acid pH Fe(III) was…”
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Aqueous Stability of Gadolinium in Surface Waters Receiving Sewage Treatment Plant Effluent, Boulder Creek, Colorado by Verplanck, Philip L, Taylor, Howard E, Nordstrom, D. Kirk, Barber, Larry B

“…In many surface waters, sewage treatment plant (STP) effluent is a substantial source of both regulated and unregulated contaminants, including a suite of…”
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Microbial oxidation of arsenite in a subarctic environment: diversity of arsenite oxidase genes and identification of a psychrotolerant arsenite oxidiser by Osborne, Thomas H, Jamieson, Heather E, Hudson-Edwards, Karen A, Nordstrom, D Kirk, Walker, Stephen R, Ward, Seamus A, Santini, Joanne M

“…Arsenic is toxic to most living cells. The two soluble inorganic forms of arsenic are arsenite (+3) and arsenate (+5), with arsenite the more toxic…”
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Electrical conductivity method for natural waters by McCleskey, R. Blaine, Kirk Nordstrom, D., Ryan, Joe N.

“…► A new method for calculating the electrical conductivity of natural waters is presented. ► The method can be used to determine the transport number of major…”
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Thermal water chemistry of Yellowstone National Park after 24 years of research by Nordstrom, D. Kirk, McCleskey, R. Blaine, Ball, James W.

“…The collection, analysis, and interpretation of 24 years of thermal water chemistry data from Yellowstone National Park have led to substantial insights into…”
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Ecological distribution and population physiology defined by proteomics in a natural microbial community by Banfield, Jillian F, Mueller, Ryan S, Denef, Vincent J, Kalnejais, Linda H, Suttle, K Blake, Thomas, Brian C, Wilmes, Paul, Smith, Richard L, Nordstrom, D Kirk, McCleskey, R Blaine, Shah, Manesh B, VerBerkmoes, Nathan C, Hettich, Robert L

“…An important challenge in microbial ecology is developing methods that simultaneously examine the physiology of organisms at the molecular level and their…”
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Acid rock drainage and climate change by Nordstrom, D. Kirk

“…Rainfall events cause both increases and decreases in acid and metals concentrations and their loadings from mine wastes, and unmined mineralized areas, into…”
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Seasonal fluctuations and geochemical modeling of acid mine drainage in the semi-arid Puna region: The Pan de Azúcar Pb–Ag–Zn mine, Argentina by Murray, Jesica, Nordstrom, D. Kirk, Dold, Bernhard, Kirschbaum, Alicia

“…Pan de Azúcar is an inactive Pb–Ag–Zn mine in the semi-arid Puna region of NW Argentina at 3600 m above sea-level. The mine is situated in Los Pozuelos basin,…”
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Origin and geochemistry of arsenic in surface and groundwaters of Los Pozuelos basin, Puna region, Central Andes, Argentina by Murray, Jesica, Nordstrom, D. Kirk, Dold, Bernhard, Romero Orué, Maria, Kirschbaum, Alicia

“…Los Pozuelos is a closed basin in the Puna region of NW Argentina, Central Andes. This is a semi-arid region where closed basins are the most important feature…”
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Mercury in water and biomass of microbial communities in hot springs of Yellowstone National Park, USA by King, Susan A., Behnke, Sabrina, Slack, Kim, Krabbenhoft, David P., Nordstrom, D. Kirk, Burr, Mark D., Striegl, Robert G.

“…Ultra-clean sampling methods and approaches typically used in pristine environments were applied to quantify concentrations of Hg species in water and…”
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