Chemist; IDREAM Director
Chemist; IDREAM Director


Dr. Carolyn Pearce re-joined PNNL in 2016 as a chemist specializing in geosciences. She 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.

In 2021, she was named Director of the Interfacial Dynamics in Radioactive Environments and Materials (IDREAM) Energy Frontier Research Center, which is led by PNNL for the U.S. Department of Energy Office of Basic Energy Sciences (BES) in the Office of Science. IDREAM researchers conduct fundamental science to support innovations in retrieving and processing high-level radioactive waste.

In January 2022, she accepted an additional role as the Signatures Team leader in PNNL's Earth Systems Science Division's Environmental Subsurface Science group.

Dr. Pearce holds a joint appointment in the Department of Crop and Soil Sciences at Washington State University. In 2022, she was appointed an honorary professor with the Department of Earth and Environmental Sciences and the Dalton Nuclear Institute at the University of Manchester, United Kingdom.

Disciplines and Skills

  • 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


  • 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)



  • Thorpe C., R. Crawford, R.J. Hand, J. Radford, C.L. Corkhill, C.I. Pearce, and J.J. Neeway, et al. 2024. "Microbial interactions with phosphorus containing glasses representative of vitrified radioactive waste." Journal of Hazardous Materials 462. PNNL-SA-189634. doi:10.1016/j.jhazmat.2023.132667


  • Delegard C.H., C.I. Pearce, and H.P. Emerson. 2023. "On Silica's Roles in Controlling Americium Migration in Contaminated Sediments." Applied Geochemistry 154. PNNL-SA-178865. doi:10.1016/j.apgeochem.2023.105690
  • Graham T.R., M. Pouvreau, R.M. Gorniak, H. Wang, E.T. Nienhuis-Marcial, Q. Miller, and J. Liu, et al. 2023. "Disordered interfaces of alkaline aluminate salt hydrates provide glimpses of Al3+ coordination changes." Journal of Colloid and Interface Science 637. PNNL-SA-179769. doi:10.1016/j.jcis.2023.01.003
  • Li Z., Y. Lyu, Z. Ran, Y. Wang, Y. Zhang, N. Lu, and M. Wang, et al. 2023. "Enhanced magnetization in CoFe2O4 through hydrogen doping." Advanced Functional Materials 33. PNNL-SA-181734. doi:10.1002/adfm.202212298
  • Liu L., B.A. Legg, W.T. Smith, L.M. Anovitz, L.M. Anovitz, X. Zhang, and R.J. Harper, et al. 2023. "Predicting outcomes of nanoparticle attachment by connecting atomistic, interfacial, particle, and aggregate scales." ACS Nano 17, no. 16:15556-15567. PNNL-SA-182308. doi:10.1021/acsnano.3c02145
  • Marcial J., J.J. Neeway, C.I. Pearce, L. Nava-Farias, M.J. Schweiger, D.K. Peeler, and C.L. Arendt, et al. 2023. Chemical durability assessment of enhanced low-activity waste glasses through EPA method 1313. PNNL-32663. Richland, WA: Pacific Northwest National Laboratory. Chemical durability assessment of enhanced low-activity waste glasses through EPA method 1313
  • Matthews B.E., J.J. Neeway, L. Nava-Farias, J. Marcial, B.W. Arey, J.A. Soltis, and L. Kovarik, et al. 2023. "Micro- and Nanoscale Surface Analysis of Late Iron Age Glass from Broborg, a Vitrified Swedish Hillfort." Microscopy and Microanalysis 29, no. 1:50-68. PNNL-SA-163973. doi:10.1093/micmic/ozac032
  • Nienhuis-Marcial E.T., T.R. Graham, N.L. DAnnunzio, M.I. Kowalska, J.A. Laverne, T.M. Orlando, and J.G. Reynolds, et al. 2023. "Cations Impact Radical Reaction Dynamics in Concentrated Multicomponent Aqueous Solutions." The Journal of Chemical Physics 158, no. 22:Art. No. : 224503. PNNL-SA-183737. doi:10.1063/5.0153132
  • Pouvreau M., Q. Guo, H. Wang, G.K. Schenter, C.I. Pearce, A.E. Clark, and K.M. Rosso. 2023. "An Efficient Reactive Force Field without Explicit Coordination Dependence for Studying Caustic Aluminum Chemistry." The Journal of Physical Chemistry Letters 14, no. 30:6743-6748. PNNL-SA-184652. doi:10.1021/acs.jpclett.3c01176
  • Saslow S.A., E. Cordova, N.M. Escobedo Avalos, O. Qafoku, M.E. Bowden, C.T. Resch, and N. Lahiri, et al. 2023. "Accumulation mechanisms for contaminants on weak-base hybrid ion exchange resins." Journal of Hazardous Materials 459. PNNL-SA-167020. doi:10.1016/j.jhazmat.2023.132165
  • Saslow S.A., T.G. Levitskaia, E. Cordova, N.M. Avalos, D. Boglaienko, Y. Fang, and X. Song, et al. 2023. "Part I: Predicting Performance of Purolite A532E Resins for Remediation of Comingled Contaminants in Groundwater." Journal of Environmental Chemical Engineering 11, no. 3:Art. No. 109618. PNNL-SA-178092. doi:10.1016/j.jece.2023.109618
  • Saslow S.A., T.G. Levitskaia, E. Cordova, N.M. Avalos, D. Boglaienko, Y. Fang, and X. Song, et al. 2023. "Part II: Predicting Performance of DOWEX 21K Resin for Remediation of Comingled Contaminants in Groundwater." Journal of Environmental Chemical Engineering 11, no. 3:Art. No. 109620. PNNL-SA-178093. doi:10.1016/j.jece.2023.109620
  • Wei Y., E.T. Nienhuis-Marcial, S.T. Mergelsberg, T.R. Graham, Q. Guo, G.K. Schenter, and C.I. Pearce, et al. 2023. "Cation Coordination Polyhedra Lead to Multiple Lengthscale Organization in Aqueous Electrolytes." Chemical Communications 59, no. 69:10400-10403. PNNL-SA-184607. doi:10.1039/D3CC02416D
  • Zhang H., Z. Wang, Y. Zhao, W. Cui, X. Zhang, S. Wang, and E.D. Walter, et al. 2023. "Metal ion (Cr3+, Eu3+, UO22+) adsorption on gibbsite nanoplates." Engineered Science 24. PNNL-SA-184575. doi:10.30919/es896


  • Baumer T., S. Hellebrandt, E. Maulden, C.I. Pearce, H.P. Emerson, M. Zavarin, and A. Kersting. 2022. "Pu distribution among mixed waste components at the Hanford legacy site, USA and implications to long-term migration." Applied Geochemistry 141. PNNL-SA-168490. doi:10.1016/j.apgeochem.2022.105304
  • Driscoll D.M., R.C. Shiery, N.L. DAnnunzio, D. Boglaienko, M. Balasubramanian, T.G. Levitskaia, and C.I. Pearce, et al. 2022. "Water defect stabilizes Bi3+ lone-pair electronic state leading to an unusual aqueous hydration structure." Inorganic Chemistry 61, no. 38:14987-14996. PNNL-SA-170091. doi:10.1021/acs.inorgchem.2c01693
  • Graham T.R., E.T. Nienhuis-Marcial, J.G. Reynolds, J. Marcial, J.S. Loring, K.M. Rosso, and C.I. Pearce. 2022. "Sodium Site Occupancy and Phosphate Speciation in Natrophosphate are Invariant to Changes to NaF and Na3PO4 Concentration." Inorganic Chemistry Frontiers 9, no. 19:4864-4875. PNNL-SA-172524. doi:10.1039/d2qi00868h
  • Graham T.R., J.Z. Hu, N.R. Jaegers, X. Zhang, C.I. Pearce, and K.M. Rosso. 2022. "An amorphous sodium aluminate hydrate phase mediates aluminum coordination changes in highly alkaline sodium hydroxide solutions." Inorganic Chemistry Frontiers 9, no. 24:6344-6357. PNNL-SA-169590. doi:10.1039/D2QI01642G
  • Nienhuis-Marcial E.T., M. Pouvreau, T.R. Graham, M.P. Prange, K. Page, J.S. Loring, and A.G. Stack, et al. 2022. "Structure and reactivity of sodium aluminate complexes in alkaline solutions." Journal of Molecular Liquids 367, no. Part A:Art. No. 120379. PNNL-SA-175319. doi:10.1016/j.molliq.2022.120379
  • Sjoblom R., E. Hj�rthner-Holder, C.I. Pearce, J.L. Weaver, E. Ogenhall, J.S. McCloy, and J. Marcial, et al. 2022. "Assessment of the reason for the vitrification of a wall at a hillfort. The example of Broborg in Sweden." Journal of Archaeological Science: Reports 43. PNNL-SA-161025. doi:10.1016/j.jasrep.2022.103459
  • Vicenzi E.P., T. Lam, J.L. Weaver, A. Herzing, J.S. McCloy, R. Sjoblom, and C.I. Pearce. 2022. "Major to Trace Element Imaging and Analysis of Iron Age Glasses Using Stage Scanning in The Analytical Dual Beam Microscope (tandem)." Heritage Science 10, no. 1:Art. No. 90. PNNL-SA-169302. doi:10.1186/s40494-022-00707-4
  • Wall N., E. Maulden, E.J. Gager, A. Ta, S. Ullberg, G. Zeng, and L. Nava-Farias, et al. 2022. "Functionalized clays for radionuclide sequestration: a review." ACS Earth and Space Chemistry 6, no. 11:2552-2574. PNNL-SA-178776. doi:10.1021/acsearthspacechem.2c00098


  • Dembowski M., J.S. Loring, M.E. Bowden, J.G. Reynolds, T.R. Graham, K.M. Rosso, and C.I. Pearce. 2021. "The controlling role of atmosphere in dawsonite versus gibbsite precipitation from tetrahedral aluminate species." Dalton Transactions 50, no. 38:13438-13446. PNNL-SA-163459. doi:10.1039/D1DT02081A
  • Emerson H.P., C.I. Pearce, C.H. Delegard, K.J. Cantrell, M. Snyder, M. Thomas, and B.N. Gartman, et al. 2021. "Influences on Subsurface Plutonium and Americium Migration." ACS Earth and Space Chemistry 5, no. 2:279-294. PNNL-SA-147891. doi:10.1021/acsearthspacechem.0c00277
  • Gartman B.N., E.S. Arnold, J.E. Szecsody, C.E. Bagwell, C.F. Brown, S.A. Saslow, and C.I. Pearce, et al. 2021. Combined Technologies for In Situ Remediation of Tc-99 and U in Subsurface Sediments. PNNL-31959. Richland, WA: Pacific Northwest National Laboratory. Combined Technologies for In Situ Remediation of Tc-99 and U in Subsurface Sediments
  • Graham T.R., M. Dembowski, H. Wang, S.T. Mergelsberg, E.T. Nienhuis-Marcial, J.G. Reynolds, and C.H. Delegard, et al. 2021. "Hydroxide promotes ion pairing in the NaNO2-NaOH-H2O system." Physical Chemistry Chemical Physics 23, no. 1:112-122. PNNL-SA-156222. doi:10.1039/D0CP04799F

  • McCloy J.S., J. Marcial, J.S. Clarke, M. Ahmadzadeh, J.A. Wolff, E.P. Vicenzi, and D.L. Bollinger, et al. 2021. "Reproduction of Melting Behavior for Vitrified Hillforts based on Amphibolite, Granite, and Basalt Lithologies." Scientific Reports 11, no. 1:Article No. 1272. PNNL-SA-152607. doi:10.1038/s41598-020-80485-w
  • Nava-Farias L., J.J. Neeway, M.J. Schweiger, J. Marcial, N.L. Canfield, C.I. Pearce, and D.K. Peeler, et al. 2021. "Applying laboratory methods for durability assessment of vitrified material to archaeological samples." npj Materials Degradation 5. PNNL-SA-161396. doi:10.1038/s41529-021-00204-2
  • Plymale A.E., J.R. Wells, C.I. Pearce, C.J. Brislawn, E.B. Graham, T. Cheeke, and J.L. Allen, et al. 2021. "Niche partitioning of microbial communities at an ancient vitrified hillfort: implications for vitrified radioactive waste disposal." Geomicrobiology Journal 38, no. 1:36-56. PNNL-SA-150253. doi:10.1080/01490451.2020.1807658
  • Reynolds J.G., M. Dembowski, T.R. Graham, and C.I. Pearce. 2021. "Nitrate and Nitrite Incompatibility with Hydroxide Ions in Concentrated NaOH Solutions: Implications for Hydroxide and Gibbsite Reactivity in Alkaline Nuclear Waste." Fluid Phase Equilibria 532. PNNL-SA-154145. doi:10.1016/j.fluid.2020.112922
  • Riechers S.L., N.G. Petrik, J.S. Loring, M.E. Bowden, J.B. Cliff, M.K. Murphy, and C.I. Pearce, et al. 2021. "Direct Visualization of Radiation-Induced Transformations at Alkali Halide-Air Interfaces." Communications Chemistry 4, no. 1:Article No. 49. PNNL-SA-155542. doi:10.1038/s42004-021-00486-2

  • Riechers S.L., N.G. Petrik, J.S. Loring, M.K. Murphy, C.I. Pearce, G.A. Kimmel, and K.M. Rosso. 2021. "Integrated Atomic Force Microscopy and X-ray Irradiation for In-situ Characterization of Radiation-Induced Processes." Review of Scientific Instruments 92, no. 11:Article 113701. PNNL-SA-161333. doi:10.1063/5.0054646
  • Thorpe C.L., J.J. Neeway, C.I. Pearce, R.J. Hand, A.J. Fisher, S.A. Walling, and N. Hyatt, et al. 2021. "Forty years of durability assessment of nuclear waste glass by standard methods." npj Materials Degradation 5. PNNL-SA-162351. doi:10.1038/s41529-021-00210-4
  • Townsend L., K. Morris, R. Harrison, B. Schacherl, T. Vitova, L. Kovarik, and C.I. Pearce, et al. 2021. "Sulfidation of magnetite with incorporated uranium." Chemosphere 276. PNNL-SA-160714. doi:10.1016/j.chemosphere.2021.130117
  • Zhang H., X. Zhang, T.R. Graham, C.I. Pearce, H. Hlushko, J.A. Laverne, and L. Liu, et al. 2021. "Crystallization and Phase Transformations of Aluminum (Oxy)hydroxide Polymorphs in Caustic Aqueous Solution." Inorganic Chemistry 60, no. 13:9820-9832. PNNL-SA-162038. doi:10.1021/acs.inorgchem.1c01111


  • Cordova E., V.A. Garayburu-Caruso, C.I. Pearce, K.J. Cantrell, J.W. Morad, E.C. Gillispie, and B.J. Riley, et al. 2020. "Hybrid Sorbents for 129I Capture from Contaminated Groundwater." ACS Applied Materials & Interfaces 12, no. 23:26113-26126. PNNL-SA-147889. doi:10.1021/acsami.0c01527
  • Delegard C.H., H.P. Emerson, K.J. Cantrell, and C.I. Pearce. 2020. Generation and Characteristics of Plutonium and Americium Contaminated Soils Underlying Waste Sites at Hanford. PNNL-29203. Richland, WA: Pacific Northwest National Laboratory. Generation and Characteristics of Plutonium and Americium Contaminated Soils Underlying Waste Sites at Hanford
  • Dembowski M., M. Snyder, C.H. Delegard, J.G. Reynolds, T.R. Graham, H. Wang, and I.I. Leavy, et al. 2020. "Ion-ion interactions enhance aluminum solubility in alkaline suspensions of nano-gibbsite (a-Al(OH)3) with sodium nitrite/nitrate." Physical Chemistry Chemical Physics. PCCP 22, no. 8:4368-4378. PNNL-SA-142835. doi:10.1039/C9CP05856G
  • Dembowski M., M.P. Prange, M. Pouvreau, T.R. Graham, M.E. Bowden, A.T. N'Diaye, and G.K. Schenter, et al. 2020. "Inference of Principal Species in Caustic Aluminate Solutions Through Solid-State Spectroscopic Characterization." Dalton Transactions 49, no. 18:5869-5880. PNNL-SA-150681. doi:10.1039/d0dt00229a
  • Dembowski M., T.R. Graham, J.G. Reynolds, S.B. Clark, K.M. Rosso, and C.I. Pearce. 2020. "Influence of soluble oligomeric aluminum on precipitation in the Al-KOH-H2O system." Physical Chemistry Chemical Physics. PCCP 22, no. 42:24677-24685. PNNL-SA-152561. doi:10.1039/d0cp04820h
  • Graham T.R., M. Dembowski, J.Z. Hu, N.R. Jaegers, X. Zhang, S.B. Clark, and C.I. Pearce, et al. 2020. "Intermediate Species in the Crystallization of Sodium Aluminate Hydroxy Hydrates." Journal of Physical Chemistry C 124, no. 23:12337-12345. PNNL-SA-150266. doi:10.1021/acs.jpcc.0c00205
  • Graham T.R., R.M. Gorniak, M. Dembowski, X. Zhang, S.B. Clark, C.I. Pearce, and A.E. Clark, et al. 2020. "Solid-State Recrystallization Pathways of Sodium Aluminate Hydroxy Hydrates." Inorganic Chemistry 59, no. 10:6857-6865. PNNL-SA-150728. doi:10.1021/acs.inorgchem.0c00258
  • Martinez Baez E., R. Feng, C.I. Pearce, G.K. Schenter, and A.E. Clark. 2020. "AI-27 NMR chemical shift of Al(OH)4- calculated from first principles: Assessment of error cancellation in chemically distinct reference and target systems." Journal of Chemical Physics 152, no. 13:Article No. 134303. PNNL-SA-150302. doi:10.1063/1.5144294
  • Moore R.C., C.I. Pearce, J.W. Morad, S. Chatterjee, T.G. Levitskaia, R.M. Asmussen, and A.R. Lawter, et al. 2020. "Iodine Immobilization by Materials through Sorption and Redox-Driven Processes: A Literature Review." Science of the Total Environment 716. PNNL-SA-138461. doi:10.1016/j.scitotenv.2019.06.166
  • Pearce C.I., E. Cordova, W.L. Garcia, S.A. Saslow, K.J. Cantrell, J.W. Morad, and O. Qafoku, et al. 2020. "Evaluation of materials for iodine and technetium immobilization through sorption and redox-driven processes." Science of the Total Environment 716. PNNL-SA-138462. doi:10.1016/j.scitotenv.2019.136167
  • Pearce C.I., R.C. Moore, J.W. Morad, R.M. Asmussen, S. Chatterjee, A.R. Lawter, and T.G. Levitskaia, et al. 2020. "Technetium Immobilization by Materials through Sorption and Redox-Driven Processes: A Literature Review." Science of the Total Environment 716. PNNL-SA-138464. doi:10.1016/j.scitotenv.2019.06.195
  • Qafoku O., L. Kovarik, M.E. Bowden, E. Nakouzi, A. Sheng, J. Liu, and C.I. Pearce, et al. 2020. "Nanoscale Observations of Fe(II)-Induced Ferrihydrite Transformation." Environmental Science Nano 7, no. 10:2953-2967. PNNL-SA-155340. doi:10.1039/D0EN00730G
  • Szecsody J.E., H.P. Emerson, C.I. Pearce, B.N. Gartman, C.T. Resch, and S. Di Pietro. 2020. "In situ reductive dissolution to remove Iodine-129 from aquifer sediments." Journal of Environmental Radioactivity 216. PNNL-SA-142245. doi:10.1016/j.jenvrad.2020.106182
  • Szecsody J.E., H.P. Emerson, R.D. Mackley, C.T. Resch, B.N. Gartman, C.I. Pearce, and S.A. Saslow, et al. 2020. Evaluation of the Change in Uranium Mobility in Sediments from the Hanford 300-FF-5 Stage B Polyphosphate Field Injection. PNNL-29650. Richland, WA: Pacific Northwest National Laboratory. Evaluation of the Change in Uranium Mobility in Sediments from the Hanford 300-FF-5 Stage B Polyphosphate Field Injection
  • Taylor S.E., C.I. Pearce, I. Chowdhury, L. Kovarik, I.I. Leavy, S.R. Baum, and A.I. Bary, et al. 2020. "Long-term Accumulation, Depth Distribution, and Speciation of Silver Nanoparticles in Biosolids-Amended Soils." Journal of Environmental Quality 49, no. 6:1679-1689. PNNL-SA-153952. doi:10.1002/jeq2.20156
  • Taylor S.E., C.I. Pearce, K.A. Sanguinet, D. Hu, W.B. Chrisler, Y. Kim, and Z. Wang, et al. 2020. "Polystyrene Nano- and Microplastic Accumulation at Arabidopsis and Wheat Root Cap Cells, but No Evidence for Uptake into Roots." Environmental Science: Nano 7, no. 7:1942-1953. PNNL-SA-147042. doi:10.1039/d0en00309c
  • Wang S., X. Zhang, T.R. Graham, H. Zhang, C.I. Pearce, Z. Wang, and S.B. Clark, et al. 2020. "Two-Step Route to Size and Shape Controlled Gibbsite Nanoplates and the Crystal Growth Mechanism." CrystEngComm 22, no. 15:2555-2565. PNNL-SA-150680. doi:10.1039/D0CE00114G
  • Wang Z., E.D. Walter, M. Sassi, X. Zhang, H. Zhang, S. Li, and Y. Chen, et al. 2020. "The role of surface hydroxyls on the radiolysis of gibbsite and boehmite nanoplatelets." Journal of Hazardous Materials 398. PNNL-SA-150311. doi:10.1016/j.jhazmat.2020.122853


  • Andrade de Notini L., D. Latta, A. Neumann, C.I. Pearce, M. Sassi, A.T. N'Diaye, and K.M. Rosso, et al. 2019. "A Closer Look at Fe(II) Passivation of Goethite." ACS Earth and Space Chemistry 3, no. 12:2717-2725. PNNL-SA-144188. doi:10.1021/acsearthspacechem.9b00224
  • Bagwell C.E., D.L. Saunders, J.W. Morad, J.R. Wells, K.C. Johnson, C.I. Pearce, and E. Cordova. 2019. Chemical and Biological Characterization of the 200 West Pump-and-Treat for Performance Assessment and Operational Improvement. PNNL-28021 Rev 1.0. Richland, WA: Pacific Northwest National Laboratory. Chemical and Biological Characterization of the 200 West Pump-and-Treat for Performance Assessment and Operational Improvement
  • Bower W.R., C.I. Pearce, A. Smith, S. Pimblott, J. Mosselmans, and R. Pattrick. 2019. "Radiation damage effects in chlorite investigated using microfocus synchrotron techniques." ACS Earth and Space Chemistry 3, no. 4:652-662. PNNL-SA-141757. doi:10.1021/acsearthspacechem.8b00205
  • Cui W., X. Zhang, C.I. Pearce, Y. Chen, S. Zhang, W. Liu, and M.H. Engelhard, et al. 2019. "Cr(III) adsorption by cluster formation on boehmite nanoplates in highly alkaline solution." Environmental Science & Technology 53, no. 18:11043-11055. PNNL-SA-143650. doi:10.1021/acs.est.9b02693
  • Graham T.R., J.Z. Hu, X. Zhang, M. Dembowski, N.R. Jaegers, C. Wan, and M.E. Bowden, et al. 2019. "Unraveling Gibbsite Transformation Pathways into LiAl-LDH in Concentrated Lithium Hydroxide." Inorganic Chemistry 58, no. 18:12385-12394. PNNL-SA-138626. doi:10.1021/acs.inorgchem.9b02000
  • Notini L., D. Latta, A. Neumann, C.I. Pearce, M. Sassi, A.T. N'Diaye, and K.M. Rosso, et al. 2019. "A Closer Look at Fe(II) Passivation of Goethite." ACS Earth and Space Chemistry 3, no. 12:2717-2725. PNNL-SA-150749. doi:10.1021/acsearthspacechem.9b00224
  • Peng H., C.I. Pearce, A.T. N'Diaye, Z. Zhu, J. Ni, K.M. Rosso, and J. Liu. 2019. "Redistribution of Electron Equivalents between Magnetite and Aqueous Fe2+ Induced by a Model Quinone Compound AQDS." Environmental Science & Technology 53, no. 4:1863-1873. PNNL-SA-142677. doi:10.1021/acs.est.8b05098
  • Stoerzinger K.A., C.I. Pearce, T.C. Droubay, V. Shutthanandan, Z. Liu, E. Arenholz, and K.M. Rosso. 2019. "Structure, Magnetism, and the Interaction of Water with Ti-Doped Fe3O4 Surfaces." Langmuir 35, no. 43:13872-13879. PNNL-SA-145960. doi:10.1021/acs.langmuir.9b02468
  • Sutherland-Harper S., F.R. Livens, C.I. Pearce, J. Hobbs, R. Orr, R. Taylor, and K.J. Webb, et al. 2019. "Interactions of HCl and H2O with the surface of PuO2." Journal of Nuclear Materials 518. PNNL-SA-142115. doi:10.1016/j.jnucmat.2019.02.036
  • Szecsody J.E., G. Wang, C.I. Pearce, A.R. Lawter, K.J. Cantrell, E. Cordova, and V.L. Freedman, et al. 2019. Evaluation of In Situ and Ex Situ Remediation Technologies for Iodine-129: Final Bench Scale Results. PNNL-28064 Rev 1.0. Richland, WA: Pacific Northwest National Laboratory. Evaluation of In Situ and Ex Situ Remediation Technologies for Iodine-129: Final Bench Scale Results
  • Truex M.J., V.L. Freedman, C.I. Pearce, and J.E. Szecsody. 2019. Assessment of Technologies for I-129 Remediation in the 200-UP-1 Operable Unit. PNNL-29148. Richland, WA: Pacific Northwest National Laboratory. Assessment of Technologies for I-129 Remediation in the 200-UP-1 Operable Unit
  • Wang H., T.R. Graham, E. Mamontov, K. Page, A.G. Stack, and C.I. Pearce. 2019. "Countercations Control Local Specific Bonding Interactions and Nucleation Mechanisms in Concentrated Water-in-Salt Solutions." The Journal of Physical Chemistry Letters 10, no. 12:3318-3325. PNNL-SA-142833. doi:10.1021/acs.jpclett.9b01416
  • Zhang X., W. Cui, J.Z. Hu, H. Wang, M.P. Prange, C. Wan, and N.R. Jaegers, et al. 2019. "Transformation of Gibbsite to Boehmite in Caustic Aqueous Solution at Hydrothermal Conditions." Crystal Growth & Design 19, no. 10:5557-5567. PNNL-SA-146423. doi:10.1021/acs.cgd.9b00468


  • Gartman B.N., J.E. Szecsody, C.E. Bagwell, E.S. Arnold, C.F. Brown, S.A. Saslow, and C.I. Pearce, et al. 2018. "Combining reductive and sequestering technologies as a potential remediation strategy for a perched water zone at Hanford, WA." Science of the Total Environment. PNNL-SA-147885.
  • Graham T.R., D. Semrouni, E. Mamontov, A.J. Ramirez-Cuesta, K. Page, A.E. Clark, and G.K. Schenter, et al. 2018. "Coupled Multimodal Dynamics of Hydrogen-Containing Ion Networks in Water-Deficient, Sodium-Hydroxide-Aluminate Solutions." Journal of Physical Chemistry B 122, no. 50:12097-12106. PNNL-SA-138723. doi:10.1021/acs.jpcb.8b09375
  • Graham T.R., K. Han, M. Dembowski, A. Krzysko, X. Zhang, J.Z. Hu, and S.B. Clark, et al. 2018. "27Al Pulsed Field Gradient, Diffusion-NMR Spectroscopy of Solvation Dynamics and Ion Pairing in Alkaline Aluminate Solutions." Journal of Physical Chemistry B 122, no. 48:10907-10912. PNNL-SA-138291. doi:10.1021/acs.jpcb.8b10145
  • Graham T.R., M. Dembowski, E. Martinez Baez, X. Zhang, N.R. Jaegers, J.Z. Hu, and M.S. Gruszkiewicz, et al. 2018. "In-Situ 27Al NMR Spectroscopy of Aluminate in Sodium Hydroxide Solutions Above and Below Saturation with Respect to Gibbsite." Inorganic Chemistry 57, no. 19:11864-11873. PNNL-SA-132754. doi:10.1021/acs.inorgchem.8b00617
  • Haynes H., C.I. Pearce, C. Boothman, and J. Lloyd. 2018. "Response of bentonite microbial communities to stresses relevant to geodisposal of radioactive waste." Chemical Geology 501. PNNL-SA-139606. doi:10.1016/j.chemgeo.2018.10.004
  • Huestis P.I., C.I. Pearce, X. Zhang, A.T. N'Diaye, K.M. Rosso, and J. Laverne. 2018. "Radiolytic Stability of Gibbsite and Boehmite with Adsorbed Water." Journal of Nuclear Materials 501. PNNL-SA-131809. doi:10.1016/j.jnucmat.2018.01.043
  • Neill T., K. Morris, C.I. Pearce, N. Sherriff, M. Burke, P.A. Chater, and A. Janssen, et al. 2018. "Stability, Composition, and Core-Shell Particle Structure of Uranium(IV)-Silicate Colloids." Environmental Science & Technology 52, no. 16:9118-9127. PNNL-SA-137628. doi:10.1021/acs.est.8b01756
  • Notini L., D. Latta, A. Neumann, C.I. Pearce, M. Sassi, A.T. N'Diaye, and K.M. Rosso, et al. 2018. "The role of defects in Fe(II) - goethite electron transfer." Environmental Science & Technology 52, no. 5:2751-2759. PNNL-SA-131667. doi:10.1021/acs.est.7b05772
  • Pearce C.I., J.P. Icenhower, R.M. Asmussen, P.G. Tratnyek, K.M. Rosso, W.W. Lukens, and N. Qafoku. 2018. "Technetium stabilization in low solubility sulfide phases: A review." ACS Earth and Space Chemistry 2, no. 6:532-547. PNNL-SA-132805. doi:10.1021/acsearthspacechem.8b00015
  • Pearce C.I., R.J. Serne, S.A. Saslow, W. Um, R.M. Asmussen, M.D. Miller, and O. Qafoku, et al. 2018. "Characterizing Technetium in Subsurface Sediments for Contaminant Remediation." ACS Earth and Space Chemistry 2, no. 11:1145-1160. PNNL-SA-130781. doi:10.1021/acsearthspacechem.8b00077
  • Pearce C.I., S.A. Saslow, R.M. Asmussen, W. Um, J.N. Serne, M.D. Miller, and O. Qafoku, et al. 2018. "Exploiting Knowledge of Technetium in the Subsurface to Develop Remediation Strategies - 18223." In Proceedings of the 44th Annual Waste Management Conference (WM2018), Nuclear and Industrial Robotics, Remote Systems and Other Emerging Technology, March 18-22, 2018, Phoenix, AZ, 8, 5082-5090. Tempe, Arizona:Waste Management Symposia, Inc. PNNL-SA-130601.
  • Pouvreau M., M. Dembowski, S.B. Clark, J.G. Reynolds, K.M. Rosso, G.K. Schenter, and C.I. Pearce, et al. 2018. "Ab Initio Molecular Dynamics Reveal Spectroscopic Siblings and Ion Pairing as New Challenges for Elucidating Prenucleation Aluminum Speciation." Journal of Physical Chemistry B 122, no. 29:7394-7402. PNNL-SA-132755. doi:10.1021/acs.jpcb.8b04377
  • Saslow S.A., W. Um, C.I. Pearce, M.E. Bowden, W.W. Lukens, M.H. Engelhard, and D. Kim, et al. 2018. "Cr(VI) Effect on Tc-99 Removal from Hanford Low-Activity Waste Simulant by Ferrous Hydroxide." Environmental Science & Technology 52, no. 20:11752-11759. PNNL-SA-135971. doi:10.1021/acs.est.8b03314
  • Sutherland-Harper S., C.I. Pearce, C. Campbell, M. Carrott, H. Colledge, C. Gregson, and J. Hobbs, et al. 2018. "Characterisation and heat treatment of chloride-contaminated and humidified PuO2 samples." Journal of Nuclear Materials 509. PNNL-SA-137690. doi:10.1016/j.jnucmat.2018.07.031
  • Sutherland-Harper S., R. Taylor, J. Hobbs, S. Pimblott, R. Pattrick, M. Sarsfield, and M.A. Denecke, et al. 2018. "Surface speciation and interactions between adsorbed chloride and water on cerium dioxide." Journal of Solid State Chemistry 262. PNNL-SA-128945. doi:10.1016/j.jssc.2018.02.018
  • Szecsody J.E., C.I. Pearce, K.J. Cantrell, N. Qafoku, G. Wang, E.C. Gillispie, and A.R. Lawter, et al. 2018. Evaluation of Remediation Technologies for Iodine-129: FY18 Bench Scale Results. PNNL-28064. Richland, WA: Pacific Northwest National Laboratory. Evaluation of Remediation Technologies for Iodine-129: FY18 Bench Scale Results
  • Weaver J.L., C.I. Pearce, R. Sjoblom, J.S. McCloy, M.D. Miller, T. Varga, and B.W. Arey, et al. 2018. "Pre-Viking Swedish Hillfort Glass: A Prospective Long-Term Alteration Analogue for Vitrified Nuclear Waste." International Journal of Applied Glass Science 9, no. 4:540-544. PNNL-26864. doi:10.1111/ijag.12351
  • Wildman A., E. Martinez Baez, J.L. Fulton, G.K. Schenter, C.I. Pearce, A.E. Clark, and X. Li. 2018. "Anticorrelated contributions to pre-edge features of aluminate near-edge X-ray absorption spectroscopy in concentrated electrolytes." Journal of Physical Chemistry Letters 9, no. 10:2444-2449. PNNL-SA-132753. doi:10.1021/acs.jpclett.8b00642
  • Zhang X., P.I. Huestis, C.I. Pearce, J.Z. Hu, K. Page, L.M. Anovitz, and A. Aleksandrov, et al. 2018. "Boehmite and Gibbsite Nanoplates for the Synthesis of Advanced Alumina Products." ACS Applied Nano Materials 1, no. 12:7115-7128. PNNL-SA-139693. doi:10.1021/acsanm.8b01969
  • Zhang X., W. Cui, K. Page, C.I. Pearce, M.E. Bowden, T.R. Graham, and Z. Shen, et al. 2018. "Size and Morphology Controlled Synthesis of Boehmite Nanoplates and Crystal Growth Mechanisms." Crystal Growth & Design 18, no. 6:3596-3606. PNNL-SA-132799. doi:10.1021/acs.cgd.8b00394


  • Hu J.Z., X. Zhang, N.R. Jaegers, C. Wan, T.R. Graham, M.Y. Hu, and C.I. Pearce, et al. 2017. "Transitions in Al Coordination During Gibbsite Crystallization Using High-Field 27Al and 23Na MAS NMR Spectroscopy." Journal of Physical Chemistry C 121, no. 49:27555-27565. PNNL-SA-130259. doi:10.1021/acs.jpcc.7b10424
  • Kaur M., J.S. Mccloy, R.K. Kukkadapu, C.I. Pearce, J. Tucek, M.E. Bowden, and M.H. Engelhard, et al. 2017. "TETRAGONAL LIKE PHASE IN CORE-SHELL IRON IRON-OXIDE." Journal of Physical Chemistry C 121, no. 21:11794-11803. PNNL-SA-124063. doi:10.1021/acs.jpcc.7b01469
  • Qafoku O., C.I. Pearce, A. Neumann, L. Kovarik, M. Zhu, E.S. Ilton, and M.E. Bowden, et al. 2017. "Tc(VII) and Cr(VI) Interaction with a Naturally Reduced Ferruginous Smectite from the Redox Transition Zone." Environmental Science & Technology 51, no. 16:9042-9052. PNNL-SA-127378. doi:10.1021/acs.est.7b02191
  • Saslow S.A., W. Um, C.I. Pearce, M.H. Engelhard, M.E. Bowden, W.W. Lukens, and I.I. Leavy, et al. 2017. "Reduction and Simultaneous Removal of 99Tc and Cr by Fe(OH)2(s) Mineral Transformation." Environmental Science & Technology 51, no. 15:8635-8642. PNNL-SA-125836. doi:10.1021/acs.est.7b02278
  • Sassi M., C.I. Pearce, P.S. Bagus, E. Arenholz, and K.M. Rosso. 2017. "First-Principles Fe L2,3-Edge and O K-Edge XANES and XMCD Spectra for Iron Oxides." Journal of Physical Chemistry A 121, no. 40:7613-7618. PNNL-SA-131673. doi:10.1021/acs.jpca.7b08392
  • Stoerzinger K.A., C.I. Pearce, T.C. Droubay, V. Shutthanandan, A. Shavorskiy, H. Bluhm, and K.M. Rosso. 2017. "Impact of Ti Incorporation on Hydroxylation and Wetting of Fe3O4." Journal of Physical Chemistry C 121, no. 35:19288-19295. PNNL-SA-128589. doi:10.1021/acs.jpcc.7b06258
  • Zhang X., X. Zhang, T.R. Graham, C.I. Pearce, B.L. Mehdi, A.T. N'Diaye, and S.N. Kerisit, et al. 2017. "Fast Synthesis of Gibbsite Nanoplates and Process Optimization using Box-Behnken Experimental Design." Crystal Growth & Design 17, no. 12:6801-6808. PNNL-SA-129361. doi:10.1021/acs.cgd.7b01400


  • Byrne J., G. van der Laan, A. Figueroa, O. Qafoku, C. Wang, C.I. Pearce, and M.J. Jackson, et al. 2016. "Size dependent microbial oxidation and reduction of magnetite nano-and micro-particles." Scientific Reports 6. PNNL-SA-119852. doi:10.1038/srep30969
  • Henderson C.B., C.I. Pearce, J.M. Charnock, J.M. Charnock, R.J. Harrison, and K.M. Rosso. 2016. "An X-ray magnetic circular dichroism (XMCD) study of Fe ordering in a synthetic MgAl2O4 - Fe3O4 (spinel - magnetite) solid solution series; implications for magnetic properties and cation site ordering." The American Mineralogist 101, no. 6:1373-1388. PNNL-SA-118383. doi:10.2138/am-2016-5612
  • Liu J., C.I. Pearce, L. Shi, Z. Wang, Z. Shi, E. Arenholz, and K.M. 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. PNNL-SA-121314. doi:10.1016/j.gca.2016.08.022
  • Lukens W.W., N. Magnani, T. Tyliszczak, C.I. Pearce, and D.K. Shuh. 2016. "Incorporation of Technetium into Spinel Ferrites." Environmental Science & Technology 50, no. 23:13160-13168. PNNL-SA-127418. doi:10.1021/acs.est.6b04209
  • Pearce C.I., K.M. Rosso, R. Pattrick, and A.R. Felmy. 2016. "Impact of iron redox chemistry on nuclear waste disposal." In Redox-reactive Minerals: Properties. Reactions and Applications in Clean Technologies, edited by IAM Ahmed and KA Hudson-Edwards. 223-266. London:European Mineralogical Union and Mineralogical Society of Great Britain & Ireland. PNNL-SA-123145. doi:10.1180/EMU-notes.17.7


  • Byrne J., N. Klueglein, C.I. Pearce, K.M. Rosso, E. Appel, and A. Kappler. 2015. "Redox cycling of Fe(II) and Fe(III) in magnetite by Fe-metabolizing bacteria." Science 347, no. 6229:1473-1476. PNNL-SA-108203. doi:10.1126/science.aaa4834
  • Chatman S.M., C.I. Pearce, and K.M. Rosso. 2015. "Charge Transport at Ti-Doped Hematite (001)/Aqueous Interfaces." Chemistry of Materials 27, no. 5:1665-1673. PNNL-SA-107093. doi:10.1021/cm504451j


  • Pearce C.I., J. Liu, D.R. Baer, O. Qafoku, S.M. Heald, E. Arenholz, and A.E. Grosz, et al. 2014. "Characterization of natural titanomagnetites (Fe3-xTixO4) for studying heterogeneous electron transfer to Tc(VII) in the Hanford subsurface." Geochimica et Cosmochimica Acta 128. PNNL-SA-100342. doi:10.1016/j.gca.2013.12.010


  • Fellowes J.W., R. Pattrick, C. Boothman, W. Al Lawati, B. van Dongen, J.M. Charnock, and J.M. Charnock, et al. 2013. "Microbial Selenium Transformations in Seleniferous Soils." European Journal of Soil Science 64, no. 5:629-638. PNNL-SA-90173. doi:10.1111/ejss.12051
  • Fellowes J.W., R. Pattrick, J. Lloyd, J.M. Charnock, J.M. Charnock, V.S. Coker, and J. Mosselmans, et al. 2013. "Ex Situ Formation of Metal Selenide Quantum Dots Using Bacterially Derived Selenide Precursors." Nanotechnology 24, no. 14:145603. PNNL-SA-95730. doi:10.1088/0957-4484/24/14/145603
  • Latta D., C.I. Pearce, K.M. Rosso, K.M. Kemner, and M.I. Boyanov. 2013. "Reaction of U-VI with titanium-substituted magnetite: Influence of Ti on U-IV speciation." Environmental Science & Technology 47, no. 9:4121-4130. PNNL-SA-93479. doi:10.1021/es303383n
  • Liu J., C.I. Pearce, C. Liu, Z. Wang, L. Shi, E. Arenholz, and K.M. Rosso. 2013. "Fe3-xTixO4 Nanoparticles as Tunable Probes of Microbial Metal Oxidation." Journal of the American Chemical Society 135, no. 24:8896-8907. PNNL-SA-94727. doi:10.1021/ja4015343


  • Felmy A.R., D.A. Moore, C.I. Pearce, S.D. Conradson, O. Qafoku, E.C. Buck, and K.M. Rosso, et al. 2012. "Controls on Soluble Pu Concentrations in PuO2/Magnetite Suspensions." Environmental Science & Technology 46, no. 21:11610-11617. PNNL-SA-83931. doi:10.1021/es3028956
  • Felmy A.R., O. Qafoku, B.W. Arey, J.Z. Hu, M.Y. Hu, H.T. Schaef, and E.S. Ilton, et al. 2012. "Reaction of Water-Saturated Supercritical CO2 with Forsterite: Evidence for Magnesite Formation at Low Temperatures." Geochimica et Cosmochimica Acta 91. PNNL-SA-82433. doi:10.1016/j.gca.2012.05.026
  • Lilova K.I., C.I. Pearce, C.A. Gorski, K.M. Rosso, and A. Navrotsky. 2012. "Thermodynamics of the Magnetite-Ulvöspinel (Fe3O4-Fe2TiO4) Solid Solution." The American Mineralogist 97, no. 0809:1330-1338. PNNL-SA-84687.
  • Lilova K.I., F. Xu, K.M. Rosso, C.I. 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." The American Mineralogist 97, no. 1:164-175. PNNL-SA-80024.
  • Liu J., C.I. Pearce, O. Qafoku, E. Arenholz, S.M. Heald, and K.M. Rosso. 2012. "Tc(VII) Reduction Kinetics by Titanomagnetite (Fe3-xTixO4) Nanoparticles." Geochimica et Cosmochimica Acta 92. PNNL-SA-86376. doi:10.1016/j.gca.2012.06.004
  • Pearce C.I., M.J. Wilkins, C. Zhang, S.M. Heald, J.K. Fredrickson, and J.M. Zachara. 2012. "Pore-Scale Characterization of Biogeochemical Controls on Iron and Uranium Speciation under Flow Conditions." Environmental Science & Technology 46, no. 15:7992-8000. PNNL-SA-86518. doi:10.1021/es301050h
  • Pearce C.I., O. Qafoku, J. Liu, E. Arenholz, S.M. Heald, R.K. Kukkadapu, and C.A. Gorski, et al. 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, no. 1:24-38. PNNL-SA-86362. doi:10.1016/j.jcis.2012.06.092
  • Pearce C.I., S.M. Baesman, J. Switzer Blum, J.W. Fellowes, and R.S. 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, edited by J.F. Stolz and R.S. Oremland. 297-319. Washington, D. C.:ASM Press. PNNL-SA-79357.


  • Droubay T.C., C.I. Pearce, E.S. Ilton, M.H. Engelhard, W. Jiang, S.M. Heald, and E. Arenholz, et al. 2011. "Epitaxial Fe3-xTixO4 films from magnetite to ulvöspinel by pulsed laser deposition." Physical Review. B, Condensed Matter 84, no. 12:Article No. 125443. PNNL-SA-78052. doi:10.1103/PhysRevB.84.125443