Staff Physicist in the Biosciences Division of
My current area of research is aqueous metal speciation near charged mineral and bacterial surfaces. I am interested in the molecular mechanisms that govern contaminant uptake by environmental adsorbents, both from a fundamental and a remediation perspective. I am also studying metal transformations caused by the respiration of bacteria, including direct enzymatic redox processes and indirect processes occuring through reduced iron minerals. The experimental techniques that I employ include synchrotron X-ray fluorescence microscopy, synchrotron X-ray absorption fine structure spectroscopy (XAFS), synchrotron X-ray tomography (CT), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), acid/base titration, atomic emission spectroscopy (ICP-AES).
The projects I am involved with can be described as Condensed Matter Physics and Physical-Chemistry problems related to Molecular Environmental Science.
The publications in the Résumé are available upon request.
I also actively collaborate with the XAFS Group led by Prof. Bruce Bunker at the Department of Physics, and the Environmental Molecular Science Institute at the University of Notre Dame, which is where I got my Ph.D. degree from.
Factors influencing the speciation of U(IV) during biotic and abiotic reduction of aqueous U(VI) and U(VI) minerals (poster 1Mb)
Reduction of aqueous U(VI) by carbonate, sulphate, and chloride green rusts (mixed valence Fe-hydroxides)
Adsorption and surface precipitation of Fe(II) on carboxyl-modified microspheres. Reduction of U(VI) by adsorbed Fe(II).
Formation of Cr3+ polymers in chromium acetate solutions (poster 1Mb)
Adsorption of Cadmium to B. subtilis Bacterial Cell Walls — a pH-Dependent XAFS Spectroscopy Study (poster 1Mb)
Mechanism of aqueous Pb adsorption to fatty acid Langmuir monolayers (poster 1Mb)
Complexation of metals (Cu, Mn, Pb, Cd, Cr) in aqueous solutions
Our wedding (21 September, 2002)
Various pictures at Daniela’s website
Last revised: 09-Dec-2009