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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. Mon . "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 = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {5}
}

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