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Title: Interaction of Aqueous Chromium Ions with Iron Oxide Surfaces

Abstract

To gain a more fundamental understanding of abiotic processes controlling reduction reactions of aqueous chromate and dichromate ions (Cr(VI)aq) in subsurface environments, we carried out molecular-level experimental and modeling studies of the interaction of water and Cr(VI)aq with well-characterized single crystal samples of synthetic and natural hematite and magnetite. A reductionist approach was adopted in which simplified model systems of increasing complexity were studied. Photoemission spectroscopy (PES), photo-electron diffraction, and vacuum STM were used to characterize the composition, atomic structure, and morpho-logy of clean surfaces of ?-Fe?O?(0001) and Fe?O?(100) grown by molecular beam epitaxy on single crystal substrates of ?-Al?O?(0001) and MgO(100), respectively.

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
897395
Report Number(s):
PNNL-SA-43343
KC0201050; TRN: US200704%%800
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Book
Resource Relation:
Related Information: Nuclear Site Remediation: First Accomplishments of the Environmental Management Science Program. ACS Symposium Series, 778:212-246
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CHROMATES; CHROMIUM IONS; DICHROMATES; DIFFRACTION; HEMATITE; IRON OXIDES; MAGNETITE; MOLECULAR BEAM EPITAXY; MONOCRYSTALS; PHOTOEMISSION; SIMULATION; SPECTROSCOPY; SUBSTRATES; WATER

Citation Formats

Brown, G E, Chambers, Scott A, Amonette, James E, Rustad, James R, Kendelewicz, Thomas, Liu, Ping, Doyle, C S, Grolimund, D, Foster, Nancy S, Joyce, Stephen A, and Thevuthasan, Suntharampillai. Interaction of Aqueous Chromium Ions with Iron Oxide Surfaces. United States: N. p., 2000. Web.
Brown, G E, Chambers, Scott A, Amonette, James E, Rustad, James R, Kendelewicz, Thomas, Liu, Ping, Doyle, C S, Grolimund, D, Foster, Nancy S, Joyce, Stephen A, & Thevuthasan, Suntharampillai. Interaction of Aqueous Chromium Ions with Iron Oxide Surfaces. United States.
Brown, G E, Chambers, Scott A, Amonette, James E, Rustad, James R, Kendelewicz, Thomas, Liu, Ping, Doyle, C S, Grolimund, D, Foster, Nancy S, Joyce, Stephen A, and Thevuthasan, Suntharampillai. 2000. "Interaction of Aqueous Chromium Ions with Iron Oxide Surfaces". United States.
@article{osti_897395,
title = {Interaction of Aqueous Chromium Ions with Iron Oxide Surfaces},
author = {Brown, G E and Chambers, Scott A and Amonette, James E and Rustad, James R and Kendelewicz, Thomas and Liu, Ping and Doyle, C S and Grolimund, D and Foster, Nancy S and Joyce, Stephen A and Thevuthasan, Suntharampillai},
abstractNote = {To gain a more fundamental understanding of abiotic processes controlling reduction reactions of aqueous chromate and dichromate ions (Cr(VI)aq) in subsurface environments, we carried out molecular-level experimental and modeling studies of the interaction of water and Cr(VI)aq with well-characterized single crystal samples of synthetic and natural hematite and magnetite. A reductionist approach was adopted in which simplified model systems of increasing complexity were studied. Photoemission spectroscopy (PES), photo-electron diffraction, and vacuum STM were used to characterize the composition, atomic structure, and morpho-logy of clean surfaces of ?-Fe?O?(0001) and Fe?O?(100) grown by molecular beam epitaxy on single crystal substrates of ?-Al?O?(0001) and MgO(100), respectively.},
doi = {},
url = {https://www.osti.gov/biblio/897395}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2000},
month = {Mon May 01 00:00:00 EDT 2000}
}

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