title: Proton electron double resonance imaging of free radical distribution in environmental science applications--first results and perspectives.
abstract: In this contribution, we explore the potential of proton electron double resonance imaging (PEDRI) in environmental science (hydrogeological) applications. After a discussion of the hydrogeological motivation for studies of free radical transport in environmental matrices, we present results from first experiments that show the principal applicability of the PEDRI technique to sediment samples. Field-cycled (FC) relaxation time contrast is identified as a possible source of artifacts in samples in which strong concentration gradients of the free radical phase are present. Furthermore, an outlook is given on how PEDRI can help in observations of the local interplay among contaminants, water and nonaqueous liquid phases.
authors.affiliation: Institut für Festkörperphysik, TU Darmstadt, D-64289 Darmstadt, Germany. nikolaus.nestle@physik.tu-darmstadt.de
authors.forename: Nikolaus
authors.initials: N
authors.lastname: Nestle
authors.forename: Keerthi
authors.initials: K
authors.lastname: Shet
authors.forename: David J
authors.initials: DJ
authors.lastname: Lurie
mesh_terms: D004578:Electron Spin Resonance Spectroscopy; D004777:Environment; D005609:Free Radicals; D019015:Geologic Sediments; D008279:Magnetic Resonance Imaging; D011522:Protons; D012822:Silicon Dioxide; D014867:Water / Q000737:chemistry
chemical_list: D005609:Free Radicals; D011522:Protons; D014867:Water; D012822:Silicon Dioxide