Crustal Geophysics and Geochemistry Science Center

Integrated Methods Development Project

Mineralogical Examination of Iron-Rich Precipitates and Metal-Mobility and Toxicity Studies

Subtask Objectives

The chemical speciation of metals influences their partitioning between dissolved and particulate phases and their biological effects. It is important to understand the processes that control metal speciation, partitioning, and bioavailability. USGS Water mission area personnel collected some iron-rich precipitates during an in-stream pH adjustment experiment in the headwaters of Mineral Creek, near Silverton, Colorado. This pH-modification experiment is part of the Toxic Substances Hydrology Program Upper Arkansas Toxics Project. Chemical, mineralogical, and microscopic characterization of this material will help calibrate and validate reactive transport models used at this study site.

The overall objective of this work is to understand processes controlling the distribution of metals between stream and streambed sediment under changing pH conditions. The specific objective is to conduct mineralogical and microscopic characterization of the iron-rich precipitates.

Products

Abstracts, Posters, Presentations

  • Smith, K.S., 2007, Geochemical and geological factors that influence metal speciation, transport, and aquatic toxicity: ERAC Workshop, Kuopio, Finland, Feb. 7, 2007.
  • Smith, K.S., Ranville, J.F., and Adams, M.K., 2008, Influence of underlying geology on aquatic metal toxicity – simulations using the Biotic Ligand Model: Invited oral presentation, ITRC Mining Waste Team Meeting, Denver, Colorado, May 28,2008.
  • Smith, K.S., Ranville, J.F., Diedrich, D.J., McKnight, D.M., and Sofield, R.M., 2010, Influence of organic-matter fractionation by natural iron nanoparticles on copper speciation and aquatic copper toxicity: American Chemical Society Spring 2010 National Meeting and Exposition, San Francisco, California, March 21-25, 2010.
  • Smith, K.S., Ranville, J.F., Diedrich, D.J., McKnight, D.M., and Sofield, R.M., 2009, Consideration of iron-organic matter interactions when predicting aquatic toxicity of copper in mineralized areas: 22nd Annual Meeting of the Rocky Mountain Chapter of the Society of Environmental Toxicology and Chemistry, Denver, Colorado, April 23-24, 2009.
  • Smith, K.S., Ranville, J.F., Diedrich, D.J., McKnight, D.M., and Sofield, R.M., 2009, Consideration of iron-organic matter interactions when predicting aquatic toxicity of copper in mineralized areas: Securing the Future 2009 and the 8th International Conference on Acid Rock Drainage (ICARD 8), Skellefteâ, Sweden, June 23- 26, 2009.
  • Smith, K.S., Ranville, J.F., Diedrich, D.J., and McKnight, D.M., 2008, Influence of organic matter fractionation on aquatic copper toxicity in mineralized environments: Geological Society of America 2008 Joint Annual Meeting, Houston, Texas, October 5-9, 2008. View Smith GSA 2008 abstract.
  • Smith, K.S., Ranville, J.F., Santore, R.C., and Adams, M.K., 2007, Anticipating potential environmental effects of aqueous metals in mineralized areas using the biotic ligand model: Geological Society of America Abstracts with Programs, v. 39, no. 6, p. 102. View Smith GSA 2007 abstract.
  • Todd, A.S., Brinkman, S., Wolf, R., Lamothe, P., Smith, K., and Ranville, J., 2007, A stable isotope technique to determine zinc pathways and aquatic toxicity in the aquatic environment: Geological Society of America Abstracts with Programs, v. 39, no. 9, p. 178. View Todd GSA 2007 abstract.
  • Todd, A.S., Smith, K.S., and Ranville, J.F., 2008, An introduction to the Biotic Ligand Model: Invited oral presentation, ITRC Mining Waste Team Meeting, Denver, Colorado, May 28, 2008.
  • Todd, A., Wolf, R., Lamothe, P., Smith, K., Brinkman, S., and Ranville, J., 2007, Development of a zinc stable isotope technique to determine metal pathways and bioavailability to aquatic organisms: Abstract and poster presentation, Society for Environmental Toxicology and Chemistry North America 28th Annual Meeting, Milwaukee, Wisconsin, November 11-15, 2007.

Articles

  • Caruso, B.S., Cox, T.J., Runkel, R.L., Velleux, M.L., Bencala, K.E., Nordstrom, D.K., Julien, P.Y., Butler, B.A., Alpers, C.N., Marion, A., and Smith, K.S., 2008, Metals fate and transport modelling in streams and watersheds: State of the science and USEPA workshop review: Hydrological Processes, v. 22, pp. 4011-4021.
  • Smith, K.S., Ranville, J.F., Diedrich, D.J., McKnight, D.M., and Sofield, R.M., 2009, Consideration of iron-organic matter interactions when predicting aquatic toxicity of copper in mineralized areas, in Proceedings of Securing the Future 2009 and the 8th International Conference on Acid Rock Drainage (ICARD 8), Skellefteå, Sweden, June 23-26, 2009, 9 p.
  • Todd, A.S., Brinkman, S., Wolf, R.E., Lamothe, P.J., Smith, K.S., and Ranville, J.F., 2009, An enriched stable-isotope approach to determine the gill-zinc binding properties of juvenile rainbow trout (Oncorhynchus mykiss) during acute zinc exposures in hard and soft waters: Environmental Toxicology and Chemistry, 28, (6), pp. 1233-1243.
  • Wildeman, T.R., Smith, K.S., and Ranville, J.F., 2007, A simple scheme to determine potential aquatic metal toxicity from mining wastes: Environmental Forensics Journal, 8 (1-2), pp. 119-128.
  • Wolf, R.E., Todd, A.S., Brinkman, S., Lamothe, P.J., Smith, K.S., and Ranville, J.F., 2009, Measurement of total Zn and Zn isotope ratios by quadrupole ICP-MS for evaluation of Zn uptake in gills of brown trout (Salmo trutta) and rainbow trout (Oncorhynchus mykiss): Talanta, 80 (2), pp. 676-684.

Contact Information

Kathleen Smith
Box 25046 MS 964D Denver Federal Center
Denver, CO 80225-0046
Phone: 303-236-5788
Email: Kathleen Smith

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