PUBLICATIONS

Huber, C.; Druhan, J.L.; Fantle, M.S.. Perspectives on geochemical proxies: The impact of model and parameter selection on the quantification of carbonate recrystallization rates. In Review.

Blankinship, J.C.; Crow, S.E., Berhe, A.A., Druhan, J.L.; Heckman, K.A.; Keiluweit, M.; Lawrence, C.R.; Spiotta, E.M.; Plante, A.F.; Rasmussen, C.; Schädel, C.; Schimel, J.P.; Sierra, C.A.; Thompson, A.; Wayai, R.; Wieder, W.R. Improving understanding of soil organic matter dynamics by triangulating theories, measurements and models. In Review.

Druhan, J.L.; Maher, K. 2017 The influence of mixing on stable isotope ratios in porous media: A revised Rayleigh model. Water Resources Research, 53, 1101-1124.

Druhan, J.L.; Fernandez, N.; Wang, J.; Dietrich, W.E.; Rempe, D. 2017 Seasonal shifts in the solute ion ratios of vadose zone rock moisture from the Eel River Critical Zone Observatory. Acta Geochimica, in press.

Liu, Y.; Oster, J.L.; Druhan, J.L2017 The hydrologic record of karst systems: Linking soil moisture to the carbon isotope signature of soils above the Blue Spring cave system. Acta Geochimica, in press.

Li, L.; Maher, K.; Navarre-Sitchler, A.; Druhan, J.L.; Meile, C.; Lawrence, C.; Moore, J.; Perdrial, J.; Sullivan, P.; Thompson, A.; Jin, L.; Bolton, E.W.; Brantley, S.L.; Dietrich, W.; Mayer, K.U.; Steefel, C.I.; Valocci, A.; Zachara, J.; Kocar, B.; Mcintoch, J.; Tutolo, B.M.; Kumar, M.; Sonnenthal, E.; Bao, C.; Beisman, J. 2017. Expanding the Role of Reactive Transport Models in Critical Zone Processes. Earth Science Reviews, 165, 280-301.

Pini, R.; Vandehey, N.T.; Druhan, J.L.; O’Neil, J.P.; Benson, S.M. 2016 Quantifying solute spreading and mixing in reservoir rocks using 3-D PET imaging. Journal of Fluid Mechanics, 796, 558 – 587.

Vialle, S.; Druhan, J.L.; Maher, K. 2016 Multi-phase flow simulation of CO2 leakage through a fractured caprock in response to mitigation strategies, International Journal of Greenhouse Gas Control, 44, 11-25.

Druhan, J.L.; Brown, S.T.; Huber, C. 2015 Isotopic gradients across fluid-mineral boundaries. Reviews in Mineralogy and Geochemistry vol. 80: Pore-scale geochemical processes, 355-391.

Wanner, C.; Druhan, J.L.; Amos, R.T.; Alt-Epping, P.; Steefel, C.I. 2015 Benchmarking the simulation of Cr isotopes. Computational Geosciences, 19(3), 497-521.

Druhan, J.L.; Vialle, S.; Maher, K., Benson, S. 2015 Numerical simulation of reactive barrier emplacement to control CO2 migration, In: Carbon Dioxide Capture for Storage in Deep Geologic Formations – Results from the CO2 Capture Project, CPL Press.

Druhan, J.L.; Steefel, C.I.; Conrad, M.E.; DePaolo, D.J. 2014 A large column analog experiment of stable isotope variations during reactive transport: I. A comprehensive model of sulfur cycling and d34S fractionation. Geochimica et Cosmochimica Acta, 124, 366 - 393.

Druhan, J.L.; Conrad, M.E.; Bill, M.; Lim, H.C.; Wu, C.; Williams, K.H.; DePaolo, D.J.; Brodie, E.L. 2014 A large column analog experiment of stable isotope variations during reactive transport: II. Carbon mass balance, microbial community structure and predation. Geochimica et Cosmochimica Acta, 124, 394 - 409.

Druhan, J.L.; Maher, K. 2014 A model linking stable isotope fractionation to water flux and transit times in heterogeneous porous media, Procedia Earth and Planetary Science, 10, 179 – 188.

Steefel, C.I.; Druhan, J.L.; Maher, K. 2014 Modeling coupled chemical and isotopic equilibration rates, Procedia Earth and Planetary Science, 10, 208 – 217.

Maher, K.; Druhan, J.L. 2014 Relationships between the transit time of water and the fluxes of weathered elements through the critical zone, Procedia Earth and Planetary Science, 10, 16 – 22.

Druhan, J.L.; Vialle, S.; Maher, K.; Benson, S. 2014 A reactive transport model for geochemical mitigation of CO2 leaking into a confined aquifer, GHGT-12 Conference Proceedings, Energy Procedia, 63, 4620 – 4629.

Hubbard C.G.; Cheng, Y.; Engelbrekston, A.; Druhan, J.L.; Li, L.; Ajo-Franklin, J.; Coates, J.D.; Conrad, M.E. 2014 Isotopic insights into microbial sulfur cycling in oil reservoirs, Frontiers in Microbiology, 5, 1 – 12.

Druhan, J.L.; Steefel, C.I.; Williams, K.H.; DePaolo, D.J. 2013 Calcium isotope fractionation in groundwater: Molecular scale processes influencing field scale variability. Geochimica et Cosmochimica Acta, 119, 93 - 116

Vandehey, N.T.; O’Neil, J.P.; Boutchko, R.; Druhan, J.L.; Moses, W.W.; Nico, P.S. 2012 Monitoring Tc dynamics in a bioreduced sediment: An investigation with gamma camera imaging of (99m)Tc-pertechnitate and (99m)Tc-DTPA. Environmental Science & Technology, 46(22), pp. 12583 – 12590.

Druhan, J.L.; Steefel, C.I.; Molins, S.; Williams, K.H.; Conrad, M.E.; DePaolo, D.J. 2012 Timing the onset of sulfate reduction over multiple subsurface acetate amendments by measurement and modeling of sulfur isotope fractionation. Environmental Science & Technology 46(16) pp. 8895 - 8902.

Boutchko, R.; Rayz, V.L.; Vandehey, N.T.; O’Neil, J.P., Budinger, T.F.; Nico, P.S.; Druhan, J.L.; Saloner, D.A.; Gullberg, G.T.; Moses, W.W. 2011 Imaging and modeling of flow in porous media using clinical nuclear emission tomography and computational fluid dynamics.  Journal of Applied Geophysics 76, pp. 74 – 81.

Nielsen, L.C., Druhan, J.L., Brown, S.T., Yang, W., DePaolo, D.J. 2011 Chapter 9: Calcium isotopes as tracers of biogeochemical processes. In: Handbook of Environmental Isotope Geochemistry, Baskaran, M. (ed.) first edition, Springer.

Williams, K.H., N’Guessan, A.L., Druhan, J.L., Long, P.E., Hubbard, S.S., Lovely, D.R., Banfield, J.F., 2010 Electrodic voltages accompanying stimulated bioremediation of a uranium-contaminated aquifer. Journal of Geophysical Research – Biogeosciences v. 115, pp. G00G05.

Williams, K.H., Kemna, A., Wilkins, M.J., Druhan, J.L., Arntzen, E., N’Guessan, A.L., Long, P.E., Hubbard, S.S., Banfield, J.F. 2009 Geophysical monitoring of coupled microbial and geochemical processes during stimulated subsurface bioremediation. Environmental Science & Technology, v. 43(17) pp. 6717-6723.

Druhan, J.L., Conrad, M.E., Williams, K.H., N’Guessan, L., Long, P.E., Hubbard, S.S., 2008 Sulfur isotopes as indicators of amended bacterial sulfate reduction processes influencing field scale uranium bioremediation. Environmental Science & Technology, v. 42(21), pp. 7842-7849.

Druhan, J.L., Hogan, J.F., Eastoe, C.J., Hibbs, B.J., Hutchison, W.R., 2008 Hydrogeologic controls on groundwater recharge and salinization: A geochemical analysis of the northern Hueco Bolson aquifer, Texas, USA. Hydrogeology Journal, v. 16(2), pp. 281-296.

Maas, R.P., Patch S.C., Pandolfo, T.J., Druhan, J.L., Gandy N.F., 2005 Lead content and exposure from children’s and adult’s jewelry products. Bulletin of Environmental Contamination and Toxicology, v. 74(3) pp. 437-444.

NON-PEER-REVIEWED PUBLICATIONS

2013 Assessment of Leakage Detection and Intervention Scenarios for CO2 Sequestration.  Stanford Center for Carbon Storage, CO2 Capture Project Phase 3 white paper, 78 p.

CONFERENCE PRESENTATIONS

Geochemistry of the Earth Surface 11 (2017): Invited Talk: Druhan, J.L., Fernandez, N.; Wang, J.; Dietrich, W.E.; Rempe, D. Seasonal shifts in the solute ion ratios of vadose zone rock moisture from the Eel River Critical Zone Observatory. Guiyang, China, 11 – 16 June.

EGU General Assembly (2017): Invited Talk: Druhan, J.L., Lawrence, C.; Oster, J.; Rempe, D.; Dietrich, W.E.  From the surface to the deep critical zone: Linking soil carbon, fluid saturation and weathering rate. Abstract 13803 presented at the 2017 EGU General Assembly, Vienna, Austria, 23-28 April.

GSCO2 Annual Review Meeting (2017): Invited Talk: Druhan, J.L. Direct imaging of transport property evolution in Mt. Simon sandstone via positron emission tomography. University of Illinois Urbana Champaign, March 29.

AGU Fall Meeting (2016): Invited Talk: Druhan, J.L., Liu, Y.; Fernandez, N.; Rempe, D.; Lawrence, C; Winnick, M.J.; Maher, K.; Dietrich, W.E..  The hydrologic interface between soil carbon and subsurface weathering: Insights from the East River Scientific Focus Area and Eel River Critical Zone Observatory, Abstract H51N-01 presented at the 2016 Fall Meeting, AGU, San Francisco, California, 12-16 Dec.

Goldschmidt (2016): Druhan, J.L., Maher, K. A new Rayleigh model for fractionation in subsurface flow. June 26 – July 1, Yokohama, Japan.

AGU Fall Meeting (2015): Invited Talk: Druhan, J.L., Lawrence, C.  A reactive transport model for the distribution and age of carbon in soils and sediments through direct simulation of the stable and radioactive isotopologues, Abstract B23I-06 presented at the 2015 Fall Meeting, AGU, San Francisco, California, 14-18 Dec.

Goldschmidt Conference (2015): Invited Talk: Druhan, J.L.; Maher, K.; Steefel, C.I.  A model for the isotope partitioning of weathering reactions in catchments. August 16 - 21, Prague, Czech Republic.

AGU Fall Meeting (2014): Invited Talk: Druhan, J.L., Bill, M., Lim, H.C., Wu, C., Conrad, M.E., Williams, K.H., DePaolo, D.J., Brodie, E.  Evidence of a dynamic microbial community structure and predation through combined microbiological and stable isotope characterization, Abstract B42B-02 presented at the 2014 Fall Meeting, AGU, San Francisco, California, 15-19 Dec.

AGU Fall Meeting (2014): Druhan, J.L., Huber, C., Parmigiani, A.  A pore scale description of calcium isotope exchange and equilibrium with calcite. Abstract H53A-0831 presented at the 2014 Fall Meeting, AGU, San Francisco, California, 15-19 Dec.

AGU Fall Meeting (2014): Druhan, J.L., Maher, K.  Fractionation, concentration and flow: A model coupling stable isotope ratios to fluid travel time and chemical reactivity. Abstract EP14A-07 presented at the 2014 Fall Meeting, AGU, San Francisco, California, 15-19 Dec.

Geochemistry of the Earth’s Surface (GES-10) (2014): Invited Talk: Druhan, J.L.; Maher, K.  A model linking stable isotope fractionation to water flux and transit times in heterogeneous porous media. August 18 - 22, Paris, France.

Goldschmidt Conference (2014): Druhan, J.L.; Steefel, C.I.; Maher, K.  Choosing a model for isotope fractionation in complex systems. June 8 - 13, Sacramento, California, USA.

AGU Fall Meeting (2013): Druhan, J.L., Maher, K. Stable isotope fractionation in response to variable fluid residence time distributions, Abstract H53F-1489 presented at the 2013 Fall Meeting, AGU, San Francisco, California, 9-13 Dec.

AGU Fall Meeting (2013): Druhan, J.L., Huber, C., Parmigiani, A., Shafei, B., Maher, K. A pore scale modeling approach to isotopic fractionation during reactive transport through porous media, Abstract H42D-02 presented at the 2013 Fall Meeting, AGU, San Francisco, California, 9-13 Dec.

AGU Fall Meeting (2013): Druhan, J.L., Maher, K., Vialle, S., Benson, S., Agarwal, A. A reactive transport model for the geochemical response, detection and potential mitigation of CO2 leakage into a confined aquifer, Abstract V34A-05 presented at the 2013 Fall Meeting, AGU, San Francisco, California, 9-13 Dec.

Goldschmidt Conference (2013): Invited Talk: Druhan, J.L.; Maher, K.; Weaver, K.; McClain, C. The influence of flow field heterogeneity on the observed δ53Cr fractionation factor during abiotic chromate reduction. August 25 – 30, Florence, Italy.

EnvironMetal Isotopes (EMI) Conference (2013): Druhan, J.L., Steefel, C.I., DePaolo, D.J.  Calcium isotope fractionation in groundwater. August 18 – 23, Ascona, Switzerland.

AGU Fall Meeting (2012): Druhan, J.L., Finsterle, S.; Vandehey, N.T.. Bouchko, R.; O’Neil, J.P.; Moses, W.W.; Nico, P.S. Direct observations of flow path evolution during reactive transport in porous media using clinical nuclear imaging tomography, Abstract H24E-05 presented at the 2012 Fall Meeting, AGU, San Francisco, California, 3-7 Dec.

Goldschmidt Conference (2012): Druhan, J.L.; Steefel, C.I.; Williams, K.H.; Nielsen, L.C.; DePaolo, D.J. Calcium isotope fractionation as a function of solution stoichiometry in groundwater. June 24-29, Montreal, Canada.

AGU Fall Meeting (2011): Druhan, J.L.; Vandehey, N.T.; Buchko, R.; O’Neil, J.P.; Moses, W.W.; Finsterle, S.; Steefel, C.; Nico, P.S.  Observing the coupled behavior of geochemistry and flow path evolution during bioreduction using clinical nuclear imaging tomography. Abstract H24A-07 presented at the 2011 Fall Meeting, AGU, San Francisco, California, 5-9 Dec.

Goldschmidt Conference (2011): Druhan, J.L.; Steefel, C.I.; Conrad, M.E.; DePaolo, D.J., A meso-scale laboratory study of stable isotope variations during uranium bioremediation. Mineralogical Magazine, August 14-19, Prague, Czech Republic.

DOE Subsurface Biogeochemical Research Contractor-Grantee Workshop (2011) Invited talk: Mechanisms for stable isotope variation during bioremediation. Washington D.C., 26-28 April.

Rifle Integrated Field Research Challenge (IFRC) Planning Meeting (2011): Isotopic systematics for biostimulated subsurface systems. Carmel-by-the-Sea, CA. 8-11 March.

AGU Fall Meeting (2010): Druhan, J.L., Conrad, M.E., Williams, K.H., Steefel, C.I., DePaolo, D.J. Sulfur isotope fractionation as an early indicator of microbial sulfate reduction under conditions of stimulated subsurface bioremediation. Abstract B54A-04 presented at the 2010 Fall Meeting, AGU, San Francisco, CA., 12-17 Dec.

Goldschmidt Conference (2010): Druhan, J.L., Conrad, M.E. Williams, K.H., DePaolo, D.J., 2010 Permeability reduction, calcium and sulfur isotope fractionation during uranium bioremediation. Geochimica et Cosmochimica Acta, v. 74(12) pp. A247.

Goldschmidt Conference (2009): Druhan, J.L., Conrad, M.E., Williams, K.H., Sonnenthal, E.L., DePaolo, D.J., 2009 Isotopic signatures for key mineralogical reactions accompanying biostimulated uranium reduction. Geochimica et Cosmochimica Acta v. 73(13) pp. A305..

AGU Fall Meeting (2008): Druhan, J.L., Dietrich, W.E., Conrad, M.E., Dawson, T.E., Fung, I., DePaolo, D.J. Geochemical characterization of moisture sources supplying a forested ecosystem in an unchanneled hillslope in the Northern California coast range. Eos Trans. AGU, 89(53), Fall Meet. Suppl. Abstract H21F-0901.

AGU Fall Meeting (2007): Druhan, J.L., Conrad, M.E., Williams, K.H., N’Guessan, L., Long, P.E., Hubbard, S.S.  Sulfur isotopes as indicators of bacterial sulfate reduction processes influencing field scale uranium bioremediaiton, Eos Trans. AGU, 88(52), Fall Meet. Suppl. Abstract H13G-1668.