Publications

Marafatto, F.F., B. Lanson and J. Peña. Crystal growth and aggregation in suspensions of δ-MnO2 nanoparticles: Implications for surface reactivity. (In review)

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.

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)

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.

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.

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..

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.

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.

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.

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

van Genuchten, C. M.*, A. J. Gadgil, 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.

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.

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.

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.

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.

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.

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.

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.

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.

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.