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Applied Geology and Geochemistry

Carolyn Pearce

Carolyn Pearce

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352


Dr. Carolyn Pearce joined the Geosciences Group at PNNL in 2016 and works on the characterization of minerals relevant to radioactive waste storage and processing in order to determine reaction mechanisms and kinetics that affect radionuclide stability in waste forms and subsurface environments. Dr. Pearce is also a visiting academic in the School of Chemistry at the University of Manchester, United Kingdom.

Research Interests

  • Synthesizing and characterizing materials for isolation and containment of risk-driving radioactive contaminants
  • Determining effects of radiation damage on mineral structure and reactivity
  • Using synchrotron-based X-ray absorption spectroscopic techniques (XANES, EXAFS, XMCD, STXM, APPES) to study interfacial reactions
  • Investigating engineered clay barrier performance in a geological disposal facility for heat-generating radioactive waste, including effects of microbial processes
  • Understanding plutonium dioxide surface structure and interaction with sorbed species

Education and Credentials

  • Ph.D., Color and Polymer Chemistry, University of Leeds, United Kingdom, 2004
  • B.Sc., Color and Polymer Chemistry, University of Leeds, United Kingdom, 2000

Affiliations and Professional Service

  • Royal Society of Chemistry
  • American Geophysical Union
  • Mineralogical Society of America
  • Mineralogical Society (UK)

Awards and Recognitions

  • Dalton Nuclear Research Fellowship (2013)
  • American Chemical Society Certificate of Merit (2012)
  • Faculty of Engineering and Physical Sciences New Academics Programme Certificate of Completion, Grade: Excellent, (2010)
  • RCUK Research Fellowship (2006-2009)
  • American Chemical Society Certificate of Merit (2007)
  • Mineralogical Society Senior Bursary (2006)
  • World Universities Network Global Exchange Award (2002-2003)

PNNL Publications


  • Kaur M, JS Mccloy, RK Kukkadapu, CI Pearce, J Tucek, ME Bowden, MH Engelhard, E Arenholz, and Y Qiang. 2017. "TETRAGONAL LIKE PHASE IN CORE-SHELL IRON IRON-OXIDE." Journal of Physical Chemistry C 121(21):11794-11803.  doi:10.1021/acs.jpcc.7b01469
  • Saslow SA, W Um, CI Pearce, MH Engelhard, ME Bowden, WW Lukens, II Leavy, BJ Riley, DS Kim, MJ Schweiger, and AA Kruger. 2017. "Reduction and Simultaneous Removal of 99Tc and Cr by Fe(OH)2(s) Mineral Transformation." Environmental Science & Technology 51(15):8635-8642.  doi:10.1021/acs.est.7b02278


  • Asmussen RM, CI Pearce, AR Lawter, JJ Neeway, BL Miller, BD Lee, NM Washton, JR Stephenson, RE Clayton, ME Bowden, EC Buck, E Cordova, N Qafoku, and BD Williams. 2016. Getter Incorporation into Cast Stone and Solid State CharacterizationsPNNL-25577 Rev. 0;RPT-SLAW-003 Rev A, Pacific Northwest National Laboratory, Richland, WA. 
  • Asmussen RM, CI Pearce, KE Parker, BW Miller, BD Lee, EC Buck, NM Washton, ME Bowden, AR Lawter, EM McElroy, and RJ Serne. 2016. Solid State Characterizations of Long-Term Leached Cast Stone MonolithsPNNL-25578 Rev.0; RPT-SWCS-008 Rev 0, Pacific Northwest National Laboratory, Richland, WA.  doi:10.2172/1328842
  • Liu J, CI Pearce, L Shi, Z Wang, Z Shi, E Arenholz, and KM Rosso. 2016. "Particle size effect and the mechanism of hematite reduction by the outer membrane cytochrome OmcA of Shewanella oneidensis MR-1." Geochimica et Cosmochimica Acta 193:160-175.  doi:10.1016/j.gca.2016.08.022


  • Byrne J, N Klueglein, CI Pearce, KM Rosso, E Appel, and A Kappler. 2015. "Redox cycling of Fe(II) and Fe(III) in magnetite by Fe-metabolizing bacteria." Science 347(6229):1473-1476.  doi:10.1126/science.aaa4834
  • Chatman SME, CI Pearce, and KM Rosso. 2015. "Charge Transport at Ti-Doped Hematite (001)/Aqueous Interfaces." Chemistry of Materials 27(5):1665-1673.  doi:10.1021/cm504451j


  • Pearce CI, J Liu, DR Baer, O Qafoku, SM Heald, E Arenholz, AE Grosz, JP McKinley, CT Resch, ME Bowden, MH Engelhard, and KM Rosso. 2014. "Characterization of natural titanomagnetites (Fe3-xTixO4) for studying heterogeneous electron transfer to Tc(VII) in the Hanford subsurface." Geochimica et Cosmochimica Acta 128:114-127.  doi:10.1016/j.gca.2013.12.010


  • Fellowes JW, R Pattrick, J Lloyd, JM Charnock, VS Coker, JFW Mosselmans, TC Weng, and CI Pearce. 2013. "Ex Situ Formation of Metal Selenide Quantum Dots Using Bacterially Derived Selenide Precursors." Nanotechnology 24(14):145603.  doi:10.1088/0957-4484/24/14/145603
  • Latta D, CI Pearce, KM Rosso, KM Kemner, and MI Boyanov. 2013. "Reaction of U-VI with titanium-substituted magnetite: Influence of Ti on U-IV speciation." Environmental Science & Technology 47(9):4121-4130.  doi:10.1021/es303383n
  • Liu J, CI Pearce, C Liu, Z Wang, L Shi, E Arenholz, and KM Rosso. 2013. "Fe3-xTixO4 Nanoparticles as Tunable Probes of Microbial Metal Oxidation." Journal of the American Chemical Society 135(24):8896-8907.  doi:10.1021/ja4015343


  • Pearce CI, MJ Wilkins, C Zhang, SM Heald, JK Fredrickson, and JM Zachara. 2012. "Pore-Scale Characterization of Biogeochemical Controls on Iron and Uranium Speciation under Flow Conditions." Environmental Science & Technology 46(15):7992-8000.  doi:10.1021/es301050h
  • Pearce CI, O Qafoku, J Liu, E Arenholz, SM Heald, RK Kukkadapu, CA Gorski, CMB Henderson, and KM Rosso. 2012. "Synthesis and properties of titanomagnetite (Fe3-xTixO4) nanoparticles: A tunable solid-state Fe(II/III) redox system." Journal of Colloid and Interface Science 387(1):24-38.  doi:10.1016/j.jcis.2012.06.092
  • Pearce CI, SM Baesman, J Switzer Blum, JW Fellowes, and RS Oremland. 2012. "Nanoparticles Formed from Bacterial Oxyanion Reduction of Toxic Group 15 and Group 16 Metalloids." In Microbial Metal and Metalloid Metabolism: Advances and Applications, ed. J.F. Stolz and R.S. Oremland, pp. 297-319.  ASM Press, Washington, D. C.. 
  • Felmy AR, DA Moore, CI Pearce, SD Conradson, O Qafoku, EC Buck, KM Rosso, and ES Ilton. 2012. "Controls on Soluble Pu Concentrations in PuO2/Magnetite Suspensions." Environmental Science & Technology 46(21):11610-11617.  doi:10.1021/es3028956
  • Felmy AR, O Qafoku, BW Arey, JZ Hu, MY Hu, HT Schaef, ES Ilton, NJ Hess, CI Pearce, J Feng, and KM Rosso. 2012. "Reaction of Water-Saturated Supercritical CO2 with Forsterite: Evidence for Magnesite Formation at Low Temperatures." Geochimica et Cosmochimica Acta 91:271-282.  doi:10.1016/j.gca.2012.05.026
  • Lilova KI, CI Pearce, CA Gorski, KM Rosso, and A Navrotsky. 2012. "Thermodynamics of the Magnetite-Ulvöspinel (Fe3O4-Fe2TiO4) Solid Solution." American Mineralogist 97(0809):1330-1338. 
  • Lilova KI, F Xu, KM Rosso, CI Pearce, S Kamali, and A Navrotsky. 2012. "Oxide Melt Solution Calorimetry of Fe2+ -bearing Oxides and Application to the Magnetite - Maghemite (Fe3O4-Fe8/3O4) system." American Mineralogist 97(1):164-175. 
  • Liu J, CI Pearce, O Qafoku, E Arenholz, SM Heald, and KM Rosso. 2012. "Tc(VII) Reduction Kinetics by Titanomagnetite (Fe3-xTixO4) Nanoparticles." Geochimica et Cosmochimica Acta 92:67-81.  doi:10.1016/j.gca.2012.06.004


  • Droubay TC, CI Pearce, ES Ilton, MH Engelhard, W Jiang, SM Heald, E Arenholz, V Shutthanandan, and KM Rosso. 2011. "Epitaxial Fe3-xTixO4 films from magnetite to ulvöspinel by pulsed laser deposition." Physical Review. B, Condensed Matter 84(12):Article No. 125443.  doi:10.1103/PhysRevB.84.125443


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