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Research Focus

The Earth's surface environment consists of a heterogeneous mixture of mineral oxides and organic macromolecules, which interact with each other and the atmosphere, water, and biota continuously. A major goal in environmental geochemistry is to gain a better understanding of interactions between these components in nature, and to apply that knowledge to predict a variety of biogeochemical processes, such as elemental cycling, biological chemistry of elements, and the fate and transport of contaminants.

Our research group focuses on understanding these interactions, specifically on their fundamental aspects, such as the structure of water, and solvation/complex formation in aqueous solutions and at natural interfaces.

Research Areas
Chemical Biology
Inorganic Chemistry
Selected Recent Publications

Yu, Q.; Szymanowski, J.; Myneni, S. C. B.; Fein, J. B., "Characterization of sulfhydryl sites within bacterial cell envelopes using selective site-blocking and potentiometric titrations." Chemical Geology 2014, 373, 50-58.

Kanno, C. M.; Sanders, R. L.; Flynn, S. M.; Lessard, G.; Myneni, S. C. B., "Novel Apatite-Based Sorbent for Defluoridation: Synthesis and Sorption Characteristics of Nano-micro-crystalline Hydroxyapatite-Coated-Limestone." Environmental Science & Technology 2014, 48 (10), 5798-5807.

Leri, A. C.; Myneni, S. C. B., "Natural organobromine in terrestrial ecosystems." Geochimica Et Cosmochimica Acta 2012, 77, 1-10.

on der Heyden, B. P.; Roychoudhury, A. N.; Mtshali, T. N.; Tyliszczak, T.; Myneni, S. C. B., "Chemically and Geographically Distinct Solid-Phase Iron Pools in the Southern Ocean." Science 2012, 338 (6111), 1199-1201.

Joe-Wong, C.; Shoenfelt, E.; Hauser, E. J.; Crompton, N.; Myneni, S. C. B., "Estimation of Reactive Thiol Concentrations in Dissolved Organic Matter and Bacterial Cell Membranes in Aquatic Systems." Environmental Science & Technology 2012, 46 (18), 9854-9861.

Krzmarzick, M. J.; Crary, B. B.; Harding, J. J.; Oyerinde, O. O.; Leri, A. C.; Myneni, S. C. B.; Novak, P. J., "Natural Niche for Organohalide-Respiring Chloroflexi." Applied and Environmental Microbiology 2012, 78 (2), 393-401.

Majzlan, J.; Alpers, C. N.; Koch, C. B.; McCleskey, R. B.; Myneni, S. C. B.; Neil, J. M., "Vibrational, X-ray absorption, and Mossbauer spectra of sulfate minerals from the weathered massive sulfide deposit at Iron Mountain, California." Chemical Geology 2011, 284 (3-4), 296-305.

ay, M. B.; Myneni, S. C. B., "X-ray Absorption Spectroscopy of Aqueous Aluminum-Organic Complexes." Journal of Physical Chemistry A 2010, 114 (20), 6138-6148.

Leri, A. C.; Myneni, S. C. B., "Organochlorine turnover in forest ecosystems: The missing link in the terrestrial chlorine cycle." Global Biogeochemical Cycles 2010, 24.

Leri, A. C.; Hakala, J. A.; Marcus, M. A.; Lanzirotti, A.; Reddy, C. M.; Myneni, S. C. B., "Natural organobromine in marine sediments: New evidence of biogeochemical Br cycling." Global Biogeochemical Cycles 2010, 24.

Wichard, T.; Mishra, B.; Myneni, S. C. B.; Bellenger, J.-P.; Kraepiel, A. M. L., "Storage and bioavailability of molybdenum in soils increased by organic matter complexation." Nature Geoscience 2009, 2 (9), 625-629.

Hay, M. B.; Myneni, S. C. B., "Geometric and Electronic Structure of the Aqueous Al(H2O)(6)(3+) Complex." Journal of Physical Chemistry A 2008, 112 (42), 10595-10603.

Komlos, J.; Mishra, B.; Lanzirotti, A.; Myneni, S. C. B.; Jaffe, P. R., "Real-time speciation of uranium during active bioremediation and U(IV) reoxidation." Journal of Environmental Engineering-Asce 2008, 134 (2), 78-86.

Deshmukh, A. P.; Pacheco, C.; Hay, M. B.; Myneni, S. C. B., "Structural environments of carboxyl groups in natural organic molecules from terrestrial systems. Part 2: 2D NMR spectroscopy." Geochimica Et Cosmochimica Acta 2007, 71 (14), 3533-3544.

Leri, A. C.; Marcus, M. A.; Myneni, S. C. B., "X-ray spectromicroscopic investigation of natural organochlorine distribution in weathering plant material." Geochimica Et Cosmochimica Acta 2007, 71 (23), 5834-5846.

Edwards, D. C.; Myneni, S. C. B., "Near edge x-ray absorption fine structure spectroscopy of bacterial hydroxamate siderophores in aqueous solutions." Journal of Physical Chemistry A 2006, 110 (42), 11809-11818.

Hay, M. B.; Myneni, S. C. B., "Structural environments of carboxyl groups in natural organic molecules from terrestrial systems. Part 1: Infrared spectroscopy." Geochimica Et Cosmochimica Acta 2007, 71 (14), 3518-3532.

Bellenger, J.-P.; Arnaud-Neu, F.; Asfari, Z.; Myneni, S. C. B.; Stiefel, E. I.; Kraepiel, A. M. L., "Complexation of oxoanions and cationic metals by the biscatecholate siderophore azotochelin." Journal of Biological Inorganic Chemistry 2007, 12 (3), 367-376.

Leri, A. C.; Hay, M. B.; Lanzirotti, A.; Rao, W.; Myneni, S. C. B., "Quantitative determination of absolute organohalogen concentrations in environmental samples by X-ray absorption spectroscopy."Analytical Chemistry 2006, 78 (16), 5711-5718.

Poussart, P. M.; Myneni, S. C. B.; Lanzirotti, A., "Tropical dendrochemistry: A novel approach to estimate age and growth from ringless trees." Geophysical Research Letters 2006, 33 (17).

Bluhm, H.; Andersson, K.; Araki, T.; Benzerara, K.; Brown, G. E.; Dynes, J. J.; Ghosal, S.; Gilles, M. K.; Hansen, H. C.; Hemminger, J. C.; Hitchcock, A. P.; Ketteler, G.; Kilcoyne, A. L. D.; Kneedler, E.; Lawrence, J. R.; Leppard, G. G.; Majzlan, J.; Mun, B. S.; Myneni, S. C. B.; Nilsson, A.; Ogasawara, H.; Ogletree, D. F.; Pecher, K.; Salmeron, M.; Shuh, D. K.; Tonner, B.; Tyliszczak, T.; Warwick, T.; Yoon, T. H., "Soft X-ray microscopy and spectroscopy at the molecular environmental science beamline at the Advanced Light Source." Journal of Electron Spectroscopy and Related Phenomena 2006, 150 (2-3), 86-104.

Strathmann, T. J.; Myneni, S. C. B., "Effect of soil fulvic acid on nickel(II) sorption and bonding at the aqueous-boehmite (gamma-AIOOH) interface." Environmental Science & Technology 2005, 39 (11), 4027-4034.

Majzlan, J.; Myneni, S. C. B., "Speciation of iron and sulfate in acid waters: Aqueous clusters to mineral precipitates." Environmental Science & Technology 2005, 39 (1), 188-194.

dwards, D. C.; Myneni, S. C. B., "Hard and soft X-ray absorption spectroscopic investigation of aqueous Fe(III)-hydroxamate siderophore complexes." Journal of Physical Chemistry A 2005, 109 (45), 10249-10256.

Edwards, D. C.; Nielsen, S. B.; Jarzecki, A. A.; Spiro, T. G.; Myneni, S. C. B., "Experimental and theoretical vibrational spectroscopy studies of acetohydroxamic acid and desferrioxamine B in aqueous solution: Effects of pH and iron complexation." Geochimica Et Cosmochimica Acta 2005, 69 (13), 3237-3248.