U.S. Department of Energy

Pacific Northwest National Laboratory

Gregg Lumetta

NPSI Project Manager, Engineer
Gregg Lumetta
(509) 375-5696

Dr. Lumetta received the 2015 Glenn T. Seaborg Actinide Separations Award recognizing significant and lasting contributions to separating actinide elements, such as plutonium and uranium. He was honored for his contributions which are being used to treat high-level radioactive waste in Hanford waste tanks and for the design and application of new ligands (molecules that bond to metal ions) to bind specific elements for waste cleanup applications. Additionally, he was recognized for his accomplishments in applying the transuranium extraction (TRUEX) process to the pre-treatment of high-level radioactive sludges inside Hanford underground waste tanks. In particular, he successfully demonstrated this concept for separating the transuranic elements plutonium and americium into smaller volumes for immobilization in borosilicate glass, leaving the remaining material to be managed as low-level waste. Dr. Lumetta has investigated leaching of aluminum from the sludge with sodium hydroxide as a front-end process to TRUEX. This leaching method was subsequently incorporated into the flowsheet currently planned for the Pretreatment Facility at the Hanford Tank Waste Treatment and Immobilization Plant. Other accomplishments include the development of new ligands for cleanup, application of existing ligands for plutonium separation, and development of new methods for separating minor actinides such as americium and curium from dissolved irradiated fuel.

Dr. Lumetta earned a doctorate degree in inorganic chemistry and a bachelor's degree in chemistry from University of Missouri — St. Louis. He is a Fellow of the American Chemical Society, and has published 70 papers in peer-reviewed journals.

Education and Credentials

  • Bachelor's Degree, Chemistry, University of Missouri.
  • Doctorate, Inorganic Chemistry, University of Missouri.
  • Postdocorate, Inorganic Chemistry/Coordination Chemistry, University of M.D. Anderson Cancer Research Center.
  • Postdocorate, Inorganic Chemistry/Radiochemistry/Solvent Extraction, Oak Ridge National Laboratory.

Affiliations and Professional Service

  • Lead Scientist, Actinide Science Team, Pacific Northwest National Laboratory (2013-Present)
  • Staff Scientist, Level V, Pacific Northwest National Laboratory (2000-Present)
  • Lead Scientist, Separations and Radiochemistry Team, Pacific Northwest National Laboratory (1999-2003)
  • Senior Research Scientist, Level IV, Pacific Northwest National Laboratory (1998-1999)
  • Senior Research Scientist, Level III, Pacific Northwest National Laboratory (1993-1997)
  • Research Scientist, Level II, Pacific Northwest National Laboratory (1990-1992)

Awards and Recognitions

  • Glenn T. Seaborg Actinide Separations Award (2015)
  • Fellow of the American Chemical Society
  • Secretarial Honor Award, Salt Waste Disposal Technologies Team (2013)
  • Council for Chemical Research 2011 Collaboration Research Award: Development and Implementation of High-Level Salt Waste Processing Technology (2011)
  • RPL Staff Award for Excellence (2002)
  • EMSL Outstanding Performance Award: Design and Synthesis of Novel Ligands for Separation Systems (2002)

Selected Publications

2016

  • 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

2015

  • 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. 

2014

  • 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. 

2013

  • 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

2012

  • 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

2011

  • 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

2010

  • 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. 
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