National Research Program


This project is addressing the role of metal geochemistry, including metal speciation, in the transformation and transport of metals, phosphorus and organic compounds in hydrologic systems. The forms (species) of metals in sedimentary environments are dependent on oxidizing/reducing conditions that are controlled by abiotic and biotic oxidation (mineralization) of organic matter in sediments. The physiochemical properties of a metallo-organic complex are related to the species (form) of the metal in the complex. Metallo-organic complexes, in particular as they affect nutrient cycling, are a focus of this project's research. Currently, the affect that complexes of tetracyclines (TCs) have on phosphorus cycling, and the transport and bioavailability of these antibiotics in hydrologic systems, are being studied. TCs are model polar pharmaceuticals and what is learned about these compounds is potentially useful in understanding the environmental fate and transport of other polar pharmaceuticals.


Simon, N.S. and Ingle, S.N., 2011, Physical and Chemical Characteristics Including Total and Geochemical Forms of Phosphorus in Sediment from the Top 30 Centimeters of Cores Collected in October 2006 at 26 Sites in Upper Klamath Lake, Oregon, U.S. Geological Survey Open-File Report 2011-1168, 49 p.

Simon, N.S. , Lynch, D. , and Gallaher, T.N., 2009, Phosphorus fractionation in sediment cores collected in 2005 before and after onset of an Aphanizomenon flos-aquae bloom in Upper Klamath Lake, OR, USA: Water, Air, and Soil Pollution, v. 204, p. 139-153, DOI 10.1007/s11270-009-0033-9.. (on-line abstract of journal article)

Kuwabara, J.S., Lynch, D.D., Topping, B.R., Murphy, F., Carter, J.L., Simon, N.S., Parchaso, F., Wood, T.M., Lindenberg, M.K., Wiese, K., and Avanzino, R., 2007, Quantifying the benthic source of nutrients to the water column of Upper Klamath Lake, Oregon: U.S. Geological Survey Open-File Report 2007-1276, 39 p. (on-line summary or on-line report in pdf format, 1.2 MB)

Speiran, G.K., Simon, N.S. and Mood-Brown, M.L., 2007, Processes affecting phosphorus and copper concentrations and their relation to algal growth in two supply reservoirs in the lower Coastal Plain of Virginia, 2002-2003, and implications for alternative management strategies: U.S. Geological Survey Scientific Investigations Report 2006-5277, 76 p. (on-line abstract or on-line report in pdf format, 2.4 MB; on-line only appendices in pdf format, 2.7MB)

American Chemical Society Committee on Analytical Reagents, eds., 2005, Reagent Chemicals, Specifications and Procedures, 10th Edition: Oxford University Press, New York, NY, 806 p. (on-line information about book)

Harthill, M.K., and Simon, N.S., 2005, Sorbant Sequestration and Removal of Toxic Metal Ions: U.S. Patent Number 6,896,813. (on-line patent)

Simon, N.S., 2005, Loosely bound oxytetracycline in riverine sediments from two tributaries of the Chesapeake Bay: Environmental Science and Technology, v. 39, no. 10, p. 3480 -3487. (on-line abstract or on-line pdf file - published by the American Chemical Society; not subject to U.S. copyright.)

Simon, N.S., Bricker, O.P., Newell, W., McCoy, J., and Morawe, R., 2005, The distribution of phosphorus in Popes Creek, VA, and in the Pocomoke River, MD: Two Watersheds with Different Land Management Practices in the Chesapeake Bay Basin: Water, Air and Soil Pollution, v. 164, no. 1-4, p. 189-204. (on-line abstract of journal article)

Bricker, O.P., Newell, W.L., and Simon, N.S., 2004, Bog iron formation in the Nassawango Creek watershed, Maryland, USA, in Martin-Duque, J.F., Brebbia, C.A., Godfrey, A.E., and Diaz De Teran, J.R., eds., Geo-Environment 2004 - Proceedings of the First International Conference on Monitoring, Simulation and Remediation of the Geological Environment, 5-7 July 2004, Los Arcos Hotel, Segovia, Spain: Southampton, U.K., WIT press, p. 13-33.

Bricker, O.P; Newell, W.L, Simon, N.S, 2003, Bog iron formation in the Nassawango Watershed, Maryland: U.S. Geological Survey Open-File Report 03-0346. (on-line report)

Harthill, M., and Simon, N., 2003, Sorbant sequestaration and removal of toxic metal ions: Patent Application NC84402, 25 p.

Simon, Nancy. 2003. Sources and bioavailability of oxytetracycline in bottom sediment from the Pocomoke River, MD, USA. 226th American Chemical Society National Meeting,: New York, NY. Division of Environmental Chemistry Preprints of Papers, v. 43, no. 2, p. 1293-1297.

Nancy S. Simon (professional profile)
U.S. Geological Survey, 432 National Center, 12201 Sunrise Valley Drive, Reston, VA 20192
Telephone: 703-648-5863

For information on additional projects in the National Research Program, see Indexes to NRP projects and bibliographies.

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