Skip to Main Content U.S. Department of Energy
Fundamental and Computational Sciences Directorate

Staff information

Malak Tfaily

Environmental Dynamics & Simulations
Pacific Northwest National Laboratory
PO Box 999
MSIN: K8-98
Richland, WA 99352

PNNL Publications


  • Bailey VL, AP Smith, MM Tfaily, SJ Fansler, and B Bond-Lamberty. 2017. "Differences in Soluble Organic Carbon Chemistry in Pore Waters Sampled from Different Pore Size Domains." Soil Biology and Biochemistry 107:133-143.  doi:10.1016/j.soilbio.2016.11.025
  • Dalcin Martins P, DW Hoyt, S Bansal, C Mills, MM Tfaily, BA Tangen, RG Fincchiaro, MD Johnston, BC Mcadams, MJ Solensky, GJ Smith, YP Chin, and MJ Wilkins. 2017. "Abundant carbon substrates drive extremely high sulfate reduction rates and methane fluxes in Prairie Pothole Wetlands." Global Change Biology 23(8):3107-3120.  doi:10.1111/gcb.13633
  • Dohnalkova A, MM Tfaily, AP Smith, RK Chu, AR Crump, CJ Brislawn, T Varga, Z Shi, L Thomashow, JB Harsh, and CK Keller. 2017. "Molecular and Microscopic Insights into the Formation of Soil Organic Matter in a Red Pine Rhizosphere." Soils 1(1):Article No. 4.  doi:10.3390/soils1010004
  • Graham EB, MM Tfaily, AR Crump, AE Goldman, LM Bramer, EV Arntzen, EB Romero, CT Resch, DW Kennedy, and JC Stegen. 2017. "Carbon Inputs From Riparian Vegetation Limit Oxidation of Physically Bound Organic Carbon Via Biochemical and Thermodynamic Processes." Journal of Geophysical Research. Biogeosciences 122(12):3,188-3,205.  doi:10.1002/2017JG003967
  • Rue G, N Rock, RS Gabor, J Pitlick, MM Tfaily, and DM Mcknight. 2017. "Concentration-discharge relationships during the recession of an extreme flood in the Boulder Creek Watershed: stability of major base cation concentrations contrasts with decreases in concentration and changes in chemical quality of dissolved organic material." Water Resources Research 53(7):5276-5297.  doi:10.1002/2016WR019708
  • Smith AP, B Bond-Lamberty, BW Benscoter, MM Tfaily, R Hinkle, C Liu, and VL Bailey. 2017. "Shifts in pore connectivity from precipitation versus groundwater rewetting increases soil carbon loss after drought." Nature Communications 8:Article No.1335.  doi:10.1038/s41467-017-01320-x
  • Staley C, AP Ferrieri, MM Tfaily, Y Cui, RK Chu, P Wang, JB Shaw, CK Ansong, HM Brewer, AD Norbeck, LM Markillie, FP do Amaral, T Tuleski, T Pellizzaro, BJ Agtuca, RA Ferrieri, S Tringe, L Pasa Tolic, G Stacey, and M Sadowsky. 2017. "Diurnal Cycling of Rhizosphere Bacterial Communities is Associated with Shifts in Carbon Metabolism." Microbiome 5:Article No. 65.  doi:10.1186/s40168-017-0287-1
  • Tfaily MM, RK Chu, JG Toyoda, N Tolic, EW Robinson, L Pasa Tolic, and NJ Hess. 2017. "Sequential extraction protocol for organic matter from soils and sediments using high resolution mass spectrometry." Analytica Chimica Acta 972:54-61.  doi:10.1016/j.aca.2017.03.031
  • Truex MJ, BD Lee, CD Johnson, N Qafoku, JE Szecsody, JE Kyle, MM Tfaily, MMV Snyder, KJ Cantrell, DL Saunders, AR Lawter, ML Oostrom, GD Tartakovsky, II Leavy, EM McElroy, D Appriou, R Sahajpal, MM Carroll, RK Chu, E Cordova, GV Last, H Lee, DI Kaplan, WL Garcia, SN Kerisit, O Qafoku, ME Bowden, FN Smith, JG Toyoda, and AE Plymale. 2017. Conceptual Model of Iodine Behavior in the Subsurface at the Hanford SitePNNL-24709 Rev. 2, Pacific Northwest National Laboratory, Richland, WA. 
  • Walker LR, MM Tfaily, JB Shaw, NJ Hess, L Pasa Tolic, and DW Koppenaal. 2017. "Unambiguous Identification & Discovery of Bacterial Siderophores by Direct Injection 21 Tesla Fourier Transform Ion Cyclotron Resonance Mass Spectrometry." Metallomics 9(1):82-92.  doi:10.1039/c6mt00201c
  • Wilson RM, MM Tfaily, V Rich, JK Keller, SD Bridgham, C Medvedeff Zalman, L Meredith, PJ Hanson, ME Hines, L Pfeifer-Meister, S Saleska, PM Crill, WT Cooper, J Chanton, and JE Kostka. 2017. "Hydrogenation of Organic Matter as a Terminal Electron Sink Sustains High CO2:CH4 Production Ratios During Anaerobic Decomposition." Organic Geochemistry 112:22-32.  doi:10.1016/j.orggeochem.2017.06.011


  • Hodgkins S, MM Tfaily, DC Podgorski, C McCalley, S Saleska, PM Crill, V Rich, J Chanton, and WT Cooper. 2016. "Elemental composition and optical properties reveal changes in dissolved organic matter along a permafrost thaw chronosequence in a subarctic peatland." Geochimica et Cosmochimica Acta 187:123-140.  doi:10.1016/j.gca.2016.05.015
  • Stegen JC, AH Hurlbert, B Bond-Lamberty, X Chen, CG Anderson, RK Chu, F Dini-Andreote, SJ Fansler, NJ Hess, and MM Tfaily. 2016. "Aligning the Measurement of Microbial Diversity with Macroecological Theory." Frontiers in Microbiology 7:Article No. 1487.  doi:10.3389/fmicb.2016.01487
  • Stegen JC, JK Fredrickson, MJ Wilkins, A Konopka, WC Nelson, EV Arntzen, WB Chrisler, RK Chu, RE Danczak, SJ Fansler, DW Kennedy, CT Resch, and MM Tfaily. 2016. "Groundwater-Surface Water Mixing Shifts Ecological Assembly Processes and Stimulates Organic Carbon Turnover." Nature Communications 7:11237.  doi:10.1038/ncomms11237
  • Wilson RM, AM Hopple, MM Tfaily, S Sebestyen, CW Schadt, L Pfeifer-Meister, C Medvedeff, K McFarlane, JE Kostka, M Kolton, R Kolka, LA Kluber, JK Keller, TP Guilderson, N Griffiths, J Chanton, SD Bridgham, and PJ Hanson. 2016. "Stability of a peatland carbon to rising temperatures." Nature Communications 7:Article No. 13723.  doi:10.1038/ncomms13723


  • Tfaily MM, RK Chu, N Tolic, KM Roscioli, CR Anderton, L Pasa-Tolic, EW Robinson, and NJ Hess. 2015. "Advanced solvent based methods for molecular characterization of soil organic matter by high-resolution mass spectrometry." Analytical Chemistry 87(10):5206-5215.  doi:10.1021/acs.analchem.5b00116

Science at PNNL

Core Research Areas

User Facilities

Centers & Institutes

Research Highlights

View All Research Highlights & Staff Accomplishments

RSS Feed