Nuclear Chemistry & Engineering Group
Nuclear Chemistry & Engineering Group

Dr. Gregg Lumetta is recognized nationally and internationally as an expert on chemical separations, especially as applied to nuclear and radiological materials. His research is focused on the study of solvent-extraction and ion-exchange systems that are being developed for advanced nuclear fuel cycles, the treatment of radioactive waste streams, radiological decontamination, and hydrometallurgy. The breadth of his work spans from the investigation of the fundamental coordination chemistry that underpins solvent extraction systems, to laboratory-scale testing of separation processes. In taking this broad approach, he has pioneered work in the separation of transuranic elements from both legacy nuclear waste and from used nuclear fuel. His research in separating americium and curium from used nuclear fuel has led to the development and testing of new processes that are internationally recognized. Dr. Lumetta is also an expert in actinide chemistry and leads efforts in synthesizing plutonium compounds for use in nuclear forensics. In this area too, his research spans from understanding the fundamental mechanisms by which such species form, to preparation of plutonium materials at the scale of hundreds of grams. His research influences a variety of U.S. Government agencies including the DOE Office of Nuclear Energy, DOE Office of Environmental Management, and the Department of Homeland Security.

Research Interests

  • Radiochemistry
  • Coordination chemistry
  • Separation science
  • The study of solvent extraction and ion-exchange systems
  • Characterization of metal complexes by spectroscopic techniques
  • The study of reaction mechanisms and equilibria by spectroscopic and calorimetric techniques

Education and Credentials

  • Ph.D., Inorganic Chemistry, University of Missouri 1986
  • B.S., Chemistry, University of Missouri 1982

Affiliations and Professional Service

  • Follow of the American Chemical Society

Awards and Recognitions

  • Environmental Technology Division ES&H Award (1997)
  • Environmental Technology Division ES&H Award (1998)
  • Outstanding Team Performance: Proposal Team for BNFL Technical Support (1998)
  • Outstanding Performance Award: Integrated System Management Critical Outcome (1999)
  • Outstanding Team Performance: Integrated Operations System (IOPS) Development and Implementation (1999)
  • Outstanding Performance Award: Technical Support Team for the Hanford Tank Waste Treatment Program (2000)
  • Outstanding Performance Award: Outstanding Technical Contribution to the Field of Chemical Separations Using Amide/Diamide Extractants (2000)
  • Outstanding Performance Award: Outstanding Efforts to Bring NMR Capability to Nuclear Science and Engineering at PNNL (2002)
  • EMSL Outstanding Performance Award: Design and Synthesis of Novel Ligands for Separation Systems (2002)
  • Outstanding Performance Award: In Appreciation For Your Efforts In Making The ISO 14001 Audit A Success (2003)
  • Honored Member of Strathmore's Who'sWho® (2003-2004)
  • Council for Chemical Research Collaboration Research Award: Development and Implementation of High-Level Salt Waste Processing Technology (2011)
  • Secretarial Honor Award, Salt Waste Technologies Team (2013)
  • Glenn T. Seaborg Actinide Separations Award (2015)
  • Editorial Board for Solvent Extraction and Ion Exchange (2002 - present)
  • Actinide Separations Conference Advisory Board (2015 – present)

PNNL Patents

PNNL Publications


  • M.P. Kelley, N. Bessen, J. Su, M. Urban, S.I. Sinkov, G.J. Lumetta, E.R. Batista, P. Yang, J.C. Shafer, “Revisiting Complexation Thermodynamics of Transplutonium Elements Up to Einsteinium,” Chem. Comm., 2018, 54, 10578-10581.
  • K. McCann, S.I. Sinkov, G.J. Lumetta, J.C. Shafer, “Inner versus Outer Sphere Metal-Monoamide Complexation: Ramifications for Tetravalent & Hexavalent Actinide Selectivity,” New J. Chem., 2018,42, 5415-5424.
  • J.A. Soltis, W.C. Isley, III, M. Conroy, S.M. Kathmann, E.C. Buck, G.J. Lumetta, “In situ electron microscopy across scales for the characterization of crystal growth mechanisms: The case of europium oxalate,” CrystEngComm, 2018, 20, 2822-2833.
  • E.L. Campbell, V.E. Holfeltz, G.B. Hall, K.L. Nash, G.J. Lumetta, T.G. Levitskaia, “Extraction Behavior of Ln(III) Ions by T2EHDGA/n-dodecane from Nitric Acid and Sodium Nitrate Solutions,” Solvent Extr. Ion Exch., 2018, 36, 331–346.
  • Lines AM, SR Adami, AJ Casella, SI Sinkov, GJ Lumetta, and SA Bryan. 2018. "Plutonium: Advancing our Understanding to Support Sustainable Nuclear Fuel Cycles." Science Trends (March 7, 2018):,
  • McCann K, SI Sinkov, GJ Lumetta, and JC Shafer. 2018. "Organic and Aqueous Redox Speciation of Cu(III) Periodate Oxidized Transuranium Actinides." Industrial Engineering Chemistry Research 57(4):1277-1283.  doi:10.1021/acs.iecr.7b04158
  • Peterson RA, EC Buck, J Chun, RC Daniel, DL Herting, ES Ilton, GJ Lumetta, and SB Clark. 2018. "Review of the Scientific Understanding of Radioactive Waste at the U.S. DOE Hanford Site." Environmental Science & Technology 52(2):381-396. doi:10.1021/acs.est.7b04077


  • Lumetta GJ, JC Bresee, PD Paviet, M Miller, and T Todd. 2017. "The Alliance of Advanced Process Control and Accountability - A Future Safeguards-By-Design Tool." In Proceedings of the 58th Annual Meeting of the Institute of Nuclear Materials Management (INMM 2017), July 16-20, 2017, Indian Wells, California, vol. 3, pp. 1645-1654.  INMM, OAKBROOK TERRACE, IL. 
  • Campbell EL, VE Holfeltz, GB Hall, K Nash, GJ Lumetta, and TG Levitskaia. 2017. "NITRIC ACID AND WATER EXTRACTION BY T2EHDGA in n-DODECANE." Solvent Extraction and Ion Exchange 35(7):586-603.  doi:10.1080/07366299.2017.1400161
  • Heller FD, AJ Casella, GJ Lumetta, KL Nash, SI Sinkov, and SA Bryan. 2017. "Incorporating Spectroscopic On-line Monitoring as a Method of Detection for a Lewis Cell Setup." Analyst 142(13):2426-2433.  doi:10.1039/C7AN00351J
  • Holfeltz VE, EL Campbell, DR Peterman, RF Standaert, A Paulenova, GJ Lumetta, and TG Levitskaia. 2017. "Effect of HEH[EHP] impurities on the ALSEP solvent extraction process." Solvent Extraction and Ion Exchange 36(1):22-40. doi:10.1080/07366299.2017.1412111
  • Lines AM, SR Adami, SI Sinkov, GJ Lumetta, and SA Bryan. 2017. "Multivariate analysis for quantification of Plutonium (IV) in nitric acid based on absorption spectra." Analytical Chemistry 89(17):9354-9359.  doi:10.1021/acs.analchem.7b02161
  • Lines AM, SR Adami, AJ Casella, SI Sinkov, GJ Lumetta, and SA Bryan. 2017. "Electrochemistry and Spectroelectrochemistry of the Pu (III/IV) and (IV/VI) Couples in Nitric Acid Systems." Electroanalysis 29(12):2744-2751. doi:10.1002/elan.201700465
  • Lumetta GJ, TG Levitskaia, A Wilden, AJ Casella, GB Hall, L Lin, SI Sinkov, JD Law, and G Modolo. 2017. "An Advanced TALSPEAK Concept for Separating Minor Actinides. Part 1. Process Optimization and Flowsheet Development." Solvent Extraction and Ion Exchange 35(6):377-395.  doi:10.1080/07366299.2017.1368901
  • Wilden A, GJ Lumetta, F Sadowski, H Schmidt, D Schneider, M Gerdes, J Law, A Geist, D Bosbach, and G Modolo. 2017. "An Advanced TALSPEAK Concept for Separating Minor Actinides. Part 2. Flowsheet Test with Actinide-Spiked Simulant." Solvent Extraction and Ion Exchange 35(6):396-407.  doi:10.1080/07366299.2017.1368945


  • Lumetta GJ, and E Arcia. 2016. "Investigating Dissolution and Precipitation Phenomena with a Smartphone Microscope." Journal of Chemical Education 93(10):1754-1759. doi:10.1021/acs.jchemed.6b00248
  • Brown MA, KE Wardle, GJ Lumetta, and AV Gelis. 2016. "Accomplishing Equilibrium in ALSEP: Demonstrations of Modified Process Chemistry on 3-D Printed Enhanced Annular Centrifugal Contactors." Procedia Chemistry 21:167-173.  doi:10.1016/j.proche.2016.10.024
  • Lumetta GJ, SI Sinkov, JA Krause, and LE Sweet. 2016. "Neodymium(III) Complexes of Dialkylphosphoric and Dialkylphosphonic Acids Relevant to Liquid-Liquid Extraction Systems." Inorganic Chemistry 55(4):1633-1641.  doi:10.1021/acs.inorgchem.5b02524


  • Sinkov SI, and GJ Lumetta. 2015. "Americium(III) Oxidation by Copper(III) Periodate in Nitric Acid Solution as Compared with the Action of Bi(V) Compounds of Sodium, Lithium, and Potassium." Radiochimica Acta 103(8):541-552.  doi:10.1515/ract-2014-2315
  • Lumetta GJ, AJ Casella, BM Rapko, TG Levitskaia, NK Pence, JC Carter, CM Niver, and MR Smoot. 2015. "An Advanced TALSPEAK Concept Using 2-Ethylhexylphosphonic Acid Mono-2-Ethylhexyl Ester as the Extractant." Solvent Extraction and Ion Exchange 33(3):211-223. doi:10.1080/07366299.2014.985920
  • Lumetta GJ, DE Meier, JM Tingey, AJ Casella, CH Delegard, MK Edwards, RD Orton, BM Rapko, and JE Smart. 2015. Design of the Laboratory-Scale Plutonium Oxide Processing Unit in the Radiochemical Processing Laboratory. PNNL-24205, Pacific Northwest National Laboratory, Richland, WA. 


  • Gelis AV, and GJ Lumetta. 2014. "Actinide Lanthanide Separation Process - ALSEP." Industrial and Engineering Chemistry Research 53(4):1624-1631.  doi:10.1021/ie403569e
  • Lumetta GJ, AV Gelis, JC Carter, CM Niver, and MR Smoot. 2014. "The Actinide-Lanthanide Separation Process." Solvent Extraction and Ion Exchange 32(4):333-347. doi:10.1080/07366299.2014.895638
  • Lumetta GJ, DE Meier, JM Tingey, AJ Casella, CH Delegard, MK Edwards, SA Jones, and BM Rapko. 2014. Conceptual Design for the Pilot-Scale Plutonium Oxide Processing Unit in the Radiochemical Processing Laboratory. PNNL-23534, Pacific Northwest National Laboratory, Richland, WA. 
  • Lumetta GJ, JC Carter, CM Niver, and AV Gelis. 2014. "Development of the Actinide-Lanthanide Separation (ALSEP) Process." In Proceedings of the 20th International Solvent Extraction Conference (ISEC 2014), September 7-11, 2014, Wurzburg, Germany.  DECHEMA, Frankfurt, Germany. 
  • Restivo ML, ME Stone, DT Herman, DP Lambert, MR Duignan, GL Smith, BE Wells, GJ Lumetta, CW Enderlin, and HE Adkins, Jr. 2014. Technology Evaluation for Conditioning of Hanford Tank Waste Using Solids Segregation and Size Reduction. PNNL-23030, Pacific Northwest National Laboratory, Richland, WA. 


  • Braley JC, GJ Lumetta, and JC Carter. 2013. "Combining CMPO and HEH[EHP] for Separating Trivalent Lanthanides from the Transuranic Elements." Solvent Extraction and Ion Exchange 31(6):567-577.  doi:10.1080/07366299.2013.785912
  • Lumetta GJ, AV Gelis, JC Braley, JC Carter, JW Pittman, MG Warner, and GF Vandegrift, III. 2013. "The TRUSPEAK Concept: Combining CMPO and HDEHP for Separating Trivalent Lanthanides from the Transuranic Elements." Solvent Extraction and Ion Exchange 31(3):223-236.  doi:10.1080/07366299.2012.670595
  • Lumetta GJ, JC Carter, CM Niver, and AV Gelis. 2013. "ZIRCONIUM AND FISSION PRODUCT MANAGEMENT IN THE ALSEP PROCESS." In Global 2013: International Nuclear Fuel Cycle Conference - Nuclear Energy at a Crossroads, September 29- October 3, 2013 Salt Lake City, Utah.  American Nuclear Society, La Grange Park, IL. 
  • Mincher B, D Peterman, R Mcdowell, L Olson, and GJ Lumetta. 2013. Radiation Chemistry of Advanced TALSPEAK Flowsheet. PNNL-22712, Pacific Northwest National Laboratory, Richland, WA. 
  • Nash KL, GJ Lumetta, and JD Vienna. 2013. "Irradiated Nuclear Fuel Management: Resource Versus Waste." Chapter 5 in Radioactive Waste Management and Contaminated Site Clean-Up: Processes, Technologies and International Experience. Woodhead Publishing Series in Energy, vol. 48, ed. WE Lee, MI Ojovan and CM Jantzen, pp. 145-170.  Woodhead Publishing, Philadelphia, PA. 
  • Ogden MD, SI Sinkov, M Nilsson, GJ Lumetta, RD Hancock, and KL Nash. 2013. "Complexation of Am(III) and Nd(III) by 1,10-Phenanthroline-2,9-Dicarboxylic Acid." Journal of Solution Chemistry 42(1):211-225.  doi:10.1007/s10953-012-9940-2


  • Sinkov SI, GJ Lumetta, MG Warner, and JW Pittman. 2012. "Binding of stereognostically designed ligands to trivalent, pentavalent, and hexavalent f-block elements." Radiochimica Acta 100(6):349-357.  doi:10.1524/ract.2012.1931
  • Braley JC, JC Carter, SI Sinkov, KL Nash, and GJ Lumetta. 2012. "The role of carboxylic acids in TALSQueak separations." Journal of Coordination Chemistry 65(16):2862-2876. 
  • Lumetta GJ, JC Braley, JM Peterson, SA Bryan, and TG Levitskaia. 2012. "Separating and Stabilizing Phosphate from High-Level Radioactive Waste: Process Development and Spectroscopic Monitoring." Environmental Science & Technology 46(11):6190-6197. doi:10.1021/es300443a
  • Lumetta GJ, JC Braley, SI Sinkov, and JC Carter. 2012. Separating the Minor Actinides Through Advances in Selective Coordination Chemistry. PNNL-21642, Pacific Northwest National Laboratory, Richland, WA. 
  • Lumetta GJ, TG Levitskaia, S Latesky, RV Henderson, EA Edwards, JC Braley, and SI Sinkov. 2012. "Lipophilic ternary complexes in liquid-liquid extraction of trivalent lanthanides." Journal of Coordination Chemistry 65(5):741-753. doi:10.1080/00958972.2012.660626
  • Ogden M, SI Sinkov, GJ Lumetta, and KL Nash. 2012. "Affinity of An(VI) for N4-Tetradentate Donor Ligands: Complexation of the Actinyl(VI) Ions with N4-Tetradentate Ligands." Journal of Solution Chemistry 41(4):616-629.  doi:10.1007/s10953-012-9827-2
  • Ogden MD, SI Sinkov, GP Meier, GJ Lumetta, and KL Nash. 2012. "Complexation of N4-Tetradentate Ligands with Nd(III) and Am(III)." Journal of Solution Chemistry 41(12):2138-2153.  doi:10.1007/s10953-012-9928-y
  • Tkac P, GF Vandegrift, III, GJ Lumetta, and AV Gelis. 2012. "Study of the Interaction between HDEHP and CMPO and Its Effect on the Extraction of Selected Lanthanides." Industrial and Engineering Chemistry Research 51(31):10433-10444.  doi:10.1021/ie300326d


  • Lumetta GJ, and KL Nash. 2011. "Preface." In Advanced Separation Techniques for Nuclear Fuel Reprocessing and Radioactive Waste Treatment" Woodhead Publishing Series in Energy No. 2, ed. KL Nash and GJ Lumetta, p. xviii.  Woodhead Publishing, Cambridge, MA. 
  • Lumetta GJ, D Neiner, SI Sinkov, JC Carter, JC Braley, S Latesky, AV Gelis, P Tkac, and GF Vandegrift, III. 2011. "COMBINING NEUTRAL AND ACIDIC EXTRACTANTS FOR RECOVERING TRANSURANIC ELEMENTS FROM NUCLEAR FUEL." Chapter 3 in Proceedings of the 19th International Solvent Extraction Conference (ISEC 2011), October 3-7, 2011, Santiago, Chile, ed. F Valenzuela and BA Moyer, p. 68.  GECAMIN, Santiago, Chile. 
  • Lumetta GJ, JC Braley, SI Sinkov, TG Levitskaia, JC Carter, MG Warner, and JW Pittman. 2011. Sigma Team for Minor Actinide Separation: PNNL FY 2011 Status Report. PNNL-20629, Pacific Northwest National Laboratory, Richland, WA. 
  • Ogden M, CL Hoch, SI Sinkov, P Meier, GJ Lumetta, and KL Nash. 2011. "Complexation Studies of Bidentate Heterocyclic N-Donor Ligands with Nd(III) and Am(III)." Journal of Solution Chemistry 40(11):1874-1888.  doi:10.1007/s10953-011-9762-7
  • Wilmarth WR, GJ Lumetta, ME Johnson, MR Poirier, MC Thompson, PC Suggs, and N Machara. 2011. "Review: Waste-Pretreatment Technologies for Remediation of Legacy Defense Nuclear Wastes." Solvent Extraction and Ion Exchange 29(1):1-48. doi:10.1080/07366299.2011.539134


  • Lumetta GJ, AV Gelis, and GF Vandegrift, III. 2010. "Solvent Systems Combining Neutral and Acidic Extractants for Separating Trivalent Lanthanides from the Transuranic Elements." Solvent Extraction and Ion Exchange 28(3):287-312. 
  • Lumetta GJ, SI Sinkov, D Neiner, TG Levitskaia, JC Braley, JC Carter, MG Warner, JW Pittman, and BM Rapko. 2010. Sigma Team for Minor Actinide Separation: PNNL FY 2010 Status Report. PNNL-19655, Pacific Northwest National Laboratory, Richland, WA. 
  • Lumetta GJ, JC Braley, MK Edwards, O Qafoku, AR Felmy, JC Carter, and PJ MacFarlan. 2010. Removing Phosphate from Hanford High-Phosphate Tank Wastes: FY 2010 Results. PNNL-19778, Pacific Northwest National Laboratory, Richland, WA. 
  • Rapko BM, SA Jones, GJ Lumetta, and RA Peterson. 2010. Effect of Antifoam Agent on Oxidative Leaching of Hanford Tank Sludge Simulants. PNNL-19015; WTP-RPT-206 Rev 0, Pacific Northwest National Laboratory, Richland, WA. 
  • Wagner GW, LR Procell, DC Sorrick, GE Lawson, CM Wells, CM Reynolds, DB Ringelberg, KL Foley, GJ Lumetta, and DL Blanchard, Jr. 2010. "All-Weather Hydrogen Peroxide-Based Decontamination of CBRN Contaminants ." Industrial and Engineering Chemistry Research 49(7):3099-3105. 


  • Lumetta GJ, JC Carter, AV Gelis, and GF Vandegrift, III. 2009. "Combining octyl(phenyl)-N,N-diisobutyl-carbamoylmethylphosphine oxide and bis-(2-ethylhexyl)phosphoric acid extractants for recovering transuranic elements from irradiated nuclear fuel." Chapter 9 in Nuclear Energy and the Environment: ACS Symposium Series, vol. 1046, ed. CM Wai and BJ Mincher, pp. 107-118.  American Chemical Society, Washington DC.  doi:10.1021/bk-2010-1046.ch009
  • Lumetta GJ, BK McNamara, EC Buck, SK Fiskum, and LA Snow. 2009. "CHARACTERIZATION OF HIGH PHOSPHATE RADIOACTIVE TANK WASTE AND SIMULANT DEVELOPMENT." Environmental Science & Technology 43(20):7843-7848. 
  • Lumetta GJ, EC Buck, RC Daniel, K Draper, MK Edwards, SK Fiskum, RT Hallen, LK Jagoda, ED Jenson, AE Kozelisky, PJ MacFarlan, RA Peterson, RW Shimskey, SI Sinkov, and LA Snow. 2009. Characterization, Leaching, and Filtration Testing for Bismuth Phosphate Sludge (Group 1) and Bismuth Phosphate Saltcake (Group 2) Actual Waste Sample Composites. PNNL-17992, Pacific Northwest National Laboratory, Richland, WA. 


  • Lumetta GJ. 2008. Mechanism of Phosphorus Removal from Hanford Tank Sludge by Caustic Leaching. PNNL-17257, Pacific Northwest National Laboratory, Richland, WA. 
  • Fiskum SK, EC Buck, RC Daniel, KE Draper, MK Edwards, TL Hubler, LK Jagoda, ED Jenson, AE Kozelisky, GJ Lumetta, PJ MacFarlan, BK McNamara, RA Peterson, SI Sinkov, LA Snow, and RG Swoboda. 2008. Characterization and Leach Testing for REDOX Sludge and S-Saltcake Actual Waste Sample Composites. PNNL-17368, Pacific Northwest National Laboratory, Richland, WA. 
  • Levitskaia TG, SI Sinkov, and GJ Lumetta. 2008. "Actinide Binding by Kl�ui Ligands: REDOX Speciation and Sorption on an Extraction Chromatography Resin." Radiochimica Acta 96(12):805-815. 
  • Rai D, M Yui, DA Moore, GJ Lumetta, KM Rosso, Y Xia, AR Felmy, and FN Skomurski. 2008. "Thermodynamic Model for ThO2(am) Solubility in Alkaline Silica Solutions ." Journal of Solution Chemistry 37(12):1725-1746.  doi:10.1007/s10953-008-9344-5
  • Rapko BM, GJ Lumetta, JR Deschane, and RA Peterson. 2008. "Process Development for Permanganate Addition During Oxidative Leaching of Hanford Tank Sludge Simulants." Separation Science and Technology 43(9-10):2840-2858. doi:10.1080/01496390802121834
  • Snow LA, GJ Lumetta, SK Fiskum, and RA Peterson. 2008. "Boehmite Actual Waste Dissolutions Studies." In Separation Science and Technology: Fifteenth Symposium on Separation Science and Technology for Energy Applications, vol. 43, no. 9-10, pp. 2900-2916.  Taylor & Francis Inc., Philadelphia, PA.  doi:10.1080/01496390802152540


  • Peterson RA, GJ Lumetta, BM Rapko, and AP Poloski. 2007. "Modeling of Boehmite Leaching from Actual Hanford High-Level Waste Samples." Separation Science and Technology 42(8):1719-1730. 
  • Arm ST, GJ Lumetta, and TG Levitskaia. 2007. "Flowsheet Modeling and Testing of Pseudohydroxide Extraction from Aqueous Sodium Hydroxide Solutions with 3,5-di-tert-Butylphenol in Isopar� L Modified with Exxal� 8." Solvent Extraction and Ion Exchange 25(5):577-591.  doi:10.1080/07366290701512691
  • Rapko BM, GJ Lumetta, JR Deschane, RA Peterson, and DL Blanchard, Jr. 2007. Process Development for Permanganate Addition During Oxidative Leaching of Hanford Tanks Sludges. PNNL-16794, Pacific Northwest National Laboratory, Richland, WA. 


  • Lumetta GJ, MC Thompson, RA Penneman, and PG Eller. 2006. "Curium." Chapter 9 in The Chemistry of the Actinide and Transactinide Elements, ed. L.R. Morss, N.M. Edelstein, J. Fuger, J.J. Katz, pp. 1397-1443.  Springer, Dordrecht, Netherlands. 
  • Sinkov SI, and GJ Lumetta. 2006. Sonochemical Digestion of High-Fired Plutonium Dioxide Samples . PNNL-16035, Pacific Northwest National Laboratory, Richland, WA. 
  • Sinkov SI, and GJ Lumetta. 2006. Sonochemical Digestion of Soil and Sediment Samples . PNNL-16036, Pacific Northwest National Laboratory, Richland, WA. 
  • Lumetta GJ, BK McNamara, TL Hubler, DW Wester, J Li, and SL Latesky. 2006. "Potential Application of Kl�ui Ligands in Actinide Separations." Chapter 13 in Separations for the Nuclear Fuel Cycle in the 21st Century, ACS Symposium Series, vol. 933, ed. Gregg J Lumetta, et al. , pp. 201-218.  American Chemical Society, Washington, DC. 
  • Lumetta GJ, and TG Levitskaia. 2006. "Pseudohydroxide Extraction from Aqueous Sodium Hydroxide Solutions with 3,5-di-tert-Butylphenol in Isopar� L Modified with 1-Octanol." Solvent Extraction and Ion Exchange 24(3):359-386. 
  • Lumetta GJ, RS Addleman, BP Hay, TL Hubler, TG Levitskaia, SI Sinkov, LA Snow, MG Warner, and SL Latesky. 2006. Selective Media for Actinide Collection and Pre-Concentration: Results of FY 2006 Studies. PNNL-16213, Pacific Northwest National Laboratory, Richland, WA. 
  • Nash KL, GJ Lumetta, SB Clark, and JI Friese. 2006. "Preface to Separations for the Nuclear Fuel Cycle in the 21st Century." In Separations for the Nuclear Fuel Cycle in the 21st Century, ACS Symposium Series, vol. 933, ed. Gregg J Lumetta, et al. , pp. xi-xii.  American Chemical Society, Washington, DC. 
  • Nash KL, GJ Lumetta, SB Clark, and JI Friese. 2006. "Significance of the Nuclear Fuel Cycle in the 21st Century." Chapter 1 in Separations for the Nuclear Fuel Cycle in the 21st Century, ACS Symposium Series, vol. 933, ed. Gregg J Lumetta, et al. , pp. 3-20.  American Chemical Society, Washington, DC. 


  • Levitskaia TG, and GJ Lumetta. 2005. "Solvent Modification in Ion-Pair Extraction: Effect on Sodium Nitrate Transport in Nitrobenzene Using a Crown Ether." Journal of Solution Chemistry 34(10):1145-1166. 


  • Lumetta GJ. 2004. "THE PROBLEM WITH ANIONS IN THE DOE COMPLEX." In Fundamentals and Applications of Anion Separations : Proceedings of a symposium held during the American Chemical Society National Meeting, August 25-30, 2001, Chicago, Illinois., ed. Singh, R.P, and Moyer, B.A., pp. 107-114  Kluwer Academic/Plenum Publishers, New York, NY. 
  • Sinkov SI, BM Rapko, GJ Lumetta, BP Hay, JE Hutchison, and BW Parks. 2004. "Bicyclic and Acyclic Diamides: Comparison of Their Aqueous Phase Binding Constants with Nd(III), Am(III), Pu(IV), Np(V), Pu(VI) and U(VI)." Inorganic Chemistry 43(26):8404-8413. 
  • Hay BP, DA Dixon, GJ Lumetta, R Vargas, and J Garza. 2004. "Structural Aspects of Hydrogen Bonding with Nitrate and Sulfate: Design Criteria for Polyalcohol Hosts." Chapter 3 in Fundamentals and Applications of Anion Separations, ed. Bruce A. Moyer, Raj P. Singh , pp. 43-56.  Kluwer Academic/Plenum, New York, NY. 
  • Hay BP, TK Firman, GJ Lumetta, BM Rapko, PA Garza, SI Sinkov, JE Hutchison, BW Parks, RD Gilbertson, and TJ Weakley. 2004. "Toward the computer-aided design of metal ion sequestering agents ." Journal of Alloys and Compounds 374(1-2):416-419. 
  • Lumetta GJ, DW Wester, BK McNamara, TL Hubler, SL Latesky, CC Martyr, and KN Richards. 2004. "A NEW EXTRACTION CHROMATOGRAPHY RESIN CONTAINING KL�UI LIGANDS FOR APPLICATION IN ACTINIDE SEPARATIONS." Solvent Extraction and Ion Exchange 22(6):947-960.  doi:10.1081/SEI-200037442


  • Lumetta GJ, BM Rapko, and HM Cho. 2003. "Studies of the Fundamental Chemistry of Hanford Tank sludges ." In ICEM'03 : 9th International Conference on Environmental Remediation and Radioactive Waste Management : held in Oxford, England, September 21-25, 2003 /.  American Society of Mechanical Engineers, New York. 
  • Lumetta GJ, BM Rapko, BP Hay, PA Garza, JE Hutchison, and RD Gilbertson. 2003. "A NOVEL BICYCLIC DIAMIDE WITH HIGH BINDING AFFINITY FOR TRIVALENT f-BLOCK ELEMENTS." Solvent Extraction and Ion Exchange 21 (1):29-39. 
  • Bonnesen PV, LH Delmau, BA Moyer, and GJ Lumetta. 2003. "Development of Effective Solvent Modifiers for the Solvent Extraction of Cesium from Alkaline High-Level Tank Waste." Solvent Extraction and Ion Exchange 21(2):141-170. 
  • Josephson GB, LM Bagaasen, JGH Geeting, PA Gauglitz, GJ Lumetta, and JS Tixier, Jr. 2003. Hanford Mission Acceleration Initiative--Preliminary Testing Recommendations for Supplemental Treatment. PNNL-14005 Rev. 1, Pacific Northwest National Laboratory, Richland, WA. 
  • Josephson GB, SR Rassat, GJ Lumetta, and PA Gauglitz. 2003. Hanford Supplemental Waste Processing Technologies - Fiscal Year 2003 Recommendations for Selective Dissolution Studies and Radioactive Waste Preparation. PNNL-14035, Pacific Northwest National Laboratory, Richland, WA. 


  • Lumetta GJ, BM Rapko, PA Garza, BP Hay, RD Gilbertson, TJ Weakley, and JE Hutchison. 2002. "Deliberate Design of Ligand Architecture Yields Dramatic Enhancement of Metal Ion Affinity." Journal of the American Chemical Society 124(20):5644-5645. 
  • Lumetta GJ. 2002. The SX Solver: A Computer Program for Analyzing Solvent-Extraction Equilibria: Version 3.0 . PNNL-13760, Pacific Northwest National Laboratory, Richland, WA. 
  • Lumetta GJ, RL Sell, and BK Mcnamara. 2002. "Thermal Decomposition of Neodymium Amide Complexes." Journal of Coordination Chemistry 55(6):651-658. 
  • Lumetta GJ, LP Darnell, PA Garza, LR Greenwood, BM Oliver, DE Rinehart, DR Sanders, CZ Soderquist, TLT Trang-Le, MW Urie, and JJ Wagner. 2002. Caustic Leaching of Hanford Tank T-110 Sludge. PNNL-13956, Pacific Northwest National Laboratory, Richland, WA. 
  • Lumetta GJ, PA Garza, TG Levitskaia, and GM Brown. 2002. Sodium Hydroxide Extraction From Caustic Leaching Solutions. PNNL-14026, Pacific Northwest National Laboratory, Richland, WA. 
  • Rai D, NJ Hess, L Rao, Z Zhang, AR Felmy, DA Moore, SB Clark, and GJ Lumetta. 2002. "Thermodynamic Model for the Solubility of Cr(OH)(3)(am) in Concentrated NaOH and NaOH-NaNO3 Solutions." Journal of Solution Chemistry 31(5):343-367. 


  • Cho HM, and GJ Lumetta. 2001. Preliminary Feasibility Study of Using Solid-State Nuclear Magnetic Resonance Spectroscopy to Characterize Hanford Tank Waste Solids. PNNL-13701, Pacific Northwest National Laboratory, Richland, WA. 
  • Fiskum SK, BM Rapko, and GJ Lumetta. 2001. "Partitioning of Mercury from Actinides in the TRUEX Process." Solvent Extraction and Ion Exchange 19(4):643-657. 
  • Lumetta GJ, KJ Carson, LP Darnell, LR Greenwood, FV Hoopes, RL Sell, SI Sinkov, CZ Soderquist, MW Urie, and JJ Wagner. 2001. Caustic Leaching of Hanford Tank S-110 Sludge . PNNL-13702, Pacific Northwest National Laboratory, Richland, WA. 
  • Moyer BA, PV Bonnesen, LH Delmau, TJ Haverlock, RA Sachleben, RA Leonard, C Conner, and GJ Lumetta. 2001. "Solvent Extraction of Tc and Cs from Alkaline Nitrate Wastes." In Solvent Extraction for the 21st Century, Proceedings of ISEC'99, Barcelona, Spain, July 11-16, 1999, vol. 2, ed. M. Cox, M. Hidalgo, and M. Valiente, pp. 1365-1370.  Society of Chemical Industry, London, , UNITED STATES. 
  • Sylvester P, A Rutherford, A Gonzalez-Martin, J Kim, BM Rapko, and GJ Lumetta. 2001. "FERRATE TREATMENT FOR REMOVING CHROMIUM FROM HIGH-LEVEL RADIOACTIVE TANK WASTE." Environmental Science and Technology 35(1):216-221. 



  • Lumetta GJ, and BM Rapko. 1999. "Removal of Chromium From Hanford Tank Sludges." Separation Science and Technology 34(6-7):1495-1506. 
  • McNamara BK, GJ Lumetta, and BM Rapko. 1999. "Extraction of Europium(III) Ion with Tetrahexylmalomamides." Solvent Extraction and Ion Exchange 17(6):1403-1421. 
  • Leonard RA, C Conner, MW Liberatore, PV Bonnesen, DJ Presley, BA Moyer, and GJ Lumetta. 1999. "Developing and Testing an Alkaline-Side Solvent Extraction Process for Technetium Separation from Tank Waste." Separation Science and Technology 34(6-7):1043-1068. 
  • Lumetta GJ, BK McNamara, and BM Rapko. 1999. The SX Solver: A New Computer Program for Analyzing Solvent- Extraction Equilibria. PNNL-12085, Pacific Northwest National Laboratory, Richland, WA. 
  • Lumetta GJ, BK McNamara, BM Rapko, and JE Hutchison. 1999. "Complexation of Uranyl Ion By Tetrahexylmalonamides: An Equilibrium Modeling and Infrared Spectroscopic Study." Inorganica Chimica Acta 293(2):195-205. 
  • Rapko BM, BK McNamara, RD Rogers, GJ Lumetta, and BP Hay. 1999. "Ordination of Lanthanide Nitrates with N,N,N',N'- Tetramethylsuccinamide." Inorganic Chemistry 38(20):4585-4592.