Peer-Reviewed Publications

26. Gonzalez-Holguera, G., I.Etui, J. Peña (2018). Contaminant loading and competitive access of Pb, Zn and Mn(III) to vacancy sites in biogenic MnO2. Chemical Geology (in press).

25. Lanson, B., F.F. Marafatto, J. Peña (2018). Reply to the ‘Comment on “Crystal growth and aggregation in suspensions of δ-MnO2 nanoparticles: implications for surface reactivity”’ by A. Manceau, Environ. Sci.: Nano, 2018, 5, 2201-2203.

24. Whitaker, A., J. Peña, M. Amor and O. Duckworth. (2018). Cr(VI) uptake and reduction in biogenic iron oxides assemblages. Env. Sci. Process. Impact. 20 (7), 1056-1068.

23. van Genuchten, C. M., A. Finger, J.R. van der Meer, and J. Peña (2018). Detection of arsenic by bacterial bioreporters in the presence of Fe(III) (oxy)hydroxide minerals. Env. Sci. Process. Impact. 20, 913-922.

22. Wang, Y., S Benkaddour, F.F. Marafatto and J. Peña (2018). Diffusion- and pH-dependent reactivity of layer-type MnO2: Reactions at particle edges versus vacancy sites. Environ. Sci. Technol. 52 (6), 3476-3485.

21. Gueguen, B., J.V. Sorensen, S.V. Lalonde, J. Peña, B.M. Toner and O. Rouxel (2018). Variable Ni isotope fractionation between Fe-oxyhydroxides and implications for the use of Ni isotopes as geochemical tracers. Chem. Geol. 481, 38-52.

20. Marafatto, F.F., B. Lanson and J. Peña (2018). Crystal growth and aggregation in suspensions of δ-MnO2 nanoparticles: Implications for surface reactivity. Environ. Sci.: Nano (10.1039/C7EN00817A).

19. van Genuchten, C. M.* and J. Peña (2017). Mn(II) oxidation in Fenton and Fenton-type systems: Identification of reaction efficiency and reaction products. Environ. Sci. Technol. 51 (5), 2982-2991.

18. van Genuchten, C. M.* and J. Peña (2016). Sorption selectivity of birnessite particle edges: a  (21d-PDF analysis of Cd(II) and Pb(II) sorption by δ-MnO2 and ferrihydrite. accepted Env. Sci. Process. Impact, J. Peña  featured in Emerging Investigator Issue)

17. van Genuchten, C. M.* and J. Peña (2016). Antimonate and arsenate speciation on reactive soil minerals studied by differential pair distribution function analysis. Chem. Geol. 429, 1-9.

16. van Genuchten, C.M*, S.R.S Bandaru, E. Surorova*, S.E. Amrose, Ashok J. Gadgil, and J. Peña (2016). Formation of macroscopic surface layers on Fe(0) electrocoagulation electrodes during a long-term field trial of arsenic treatment. Chemosphere 153, 270-279.

15. Simanova, A.A.* and J. Peña (2015). Time-resolved investigation of cobalt oxidation by Mn(III) rich d-MnO2 using quick X-ray absorption spectroscopy. Env. Sci. Technol., 49 (18), 10867-10876..

14. Simanova, A.A.*, K. K. Kwon, E. Bone, J. R. Bargar, K. Refson, G. Sposito, J. Peña (2015). Trace metal sorption on the edge surfaces of birnessite nanoparticles. Geochim. Cosmochim. Acta, 164(1), 191-204.

13. Marafatto, F.M.*, M.L. Strader, J. Gonzalez-Holguera*, A Schwartzberg, B. Gilbert and J. Peña (2015). Rate and mechanism of the photoreduction of birnessite (MnO2) nanosheets. Proc. Natl. Acad. Sci. U.S.A., 112(15): 4600-4605.

12. Droz, B.*, N. Dumas*, O.W. Duckworth and J. Peña (2015). A comparison of the sorption reactivity of bacteriogenic and mycogenic Mn oxides nanoparticles. Environ. Sci. Technol., 49(7): 4200-4208.

11. Peña, J., J. R. Bargar and G. Sposito (2015). Copper sorption by the edge surfaces of birnessite nanoparticles. Chem Geo., 396:196-207.

10. van Genuchten, C. M.*, A. J. Gadgil, J. Peña (2014). Fe(III) nucleation in the presence of bivalent cations and oxyanions leads to sub-nanoscale 7 Å polymers. Environ. Sci. Technol. 48(20), 11828-11836.

9. van Genuchten, C. M.*, J. Peña, S. E. Addy, A. J. Gadgil (2014). Structure of Fe(III) precipitates generated by the electrolytic dissolution of Fe(0) in the presence of groundwater ions. Geochim. Cosmochim. Acta. 127, 285-304.

8. van Genuchten, C. M., S. E. Addy, J. Peña, A. J. Gadgil (2012). Removing arsenic from synthetic groundwater with iron electrocoagulation: An Fe and As K-edge EXAFS study. Environ. Sci. Technol. 46, 986–994.

7. Peña, J., J. R. Bargar and G. Sposito (2011). Role of Bacterial Biomass in the Sorption of Ni by Biomass-Birnessite Assemblages. Environ. Sci. Technol.45, 7338-7344.

6. Peña, J., K.K. Kwon, K.R. Refson, J.R. Bargar and G. Sposito (2010). Mechanisms of Nickel Sorption by Bacteriogenic Birnessite. Geochim. Cosmochim. Acta. 74, 3076-3089.

5. Kelly, S.D., S.R. Bare, N. Greenlay, G. Azevedo, M. Balasubramanian, D. Barton , S. Chattopadhyay, S. Fakra, B. Johannessen, M. Newville, J. Peña, G. Pokrovski, O. Proux, K. Priolkar, B. Ravel and S. Webb (2009). Comparison of EXAFS Foil Spectra from Around the World. J. Phys.: XAFS14 Conf. Proc. 190, 1-4.

4. Duckworth, O.W., S.M. Holmstrom, J. Peña, and G. Sposito (2009). Biogeochemistry of Iron Oxidation in a Circumneutral Freshwater Habitat. Chem. Geol. 260, 149-158.

3. Peña, J., O.W. Duckworth, J.R. Bargar, and G. Sposito (2007). Dissolution of Hausmannite in the Presence of the Trihydroxamate Siderophore Desferrioxamine B. Geochim. Cosmochim. Acta. 71, 5661-5671.

2. Tokunaga, T.K., J. Wan, J. Peña, E.L. Brodie, M.K. Firestone, T. C. Hazen, S.R. Sutton, A. Lanzirotti, M. Newville (2005). Uranium Reduction in Sediments Under Diffusion-Limited Transport of Organic Carbon. Environ. Sci. Technol. 39, 7077-7083.

1. Tokunaga, T.K., J. Wan, J. Peña, S.R. Sutton, and M. Newville (2004). Hexavalent Uranium Diffusion in Soils from Concentrated Acidic and Alkaline Solutions. Environ. Sci. Technol. 38, 3056-3062.