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Title: Investigation of surface structures by powder diffraction : a differential pair distribution function study on arsenate sorption on ferrihydrite.

Abstract

Differential pair distribution function (d-PDF) analysis of high energy powder X-ray diffraction data was carried out on 2-line ferrihydrite nanoparticles with arsenate oxyanions adsorbed on the surface to investigate the binding mechanism. In this analysis, a PDF of ferrihydrite is subtracted from a PDF of ferrihydrite with arsenate sorbed on the surface, leaving only correlations from within the surface layer and between the surface and the particle. As-O and As-Fe correlations were observed at 1.68 and 3.29 {angstrom}, respectively, in good agreement with previously published EXAFS data, confirming a bidentate binuclear binding mechanism. Further peaks are observed in the d-PDF which are not present in EXAFS, corresponding to correlations between As and O in the particle and As-2nd Fe.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC)
OSTI Identifier:
983472
Report Number(s):
ANL/XSD/JA-67313
Journal ID: ISSN 0020-1669; INOCAJ; TRN: US201014%%500
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Inorg. Chem.; Journal Volume: 49; Journal Issue: 2010
Country of Publication:
United States
Language:
ENGLISH
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ARSENATES; DIFFRACTION; DISTRIBUTION FUNCTIONS; SORPTION; X-RAY DIFFRACTION

Citation Formats

Harrington, R., Hausner, D. B., Bhandari, N., Strongin, D. R., Chapman, K. W., Chupas, P. J., Middlemiss, D. S., Grey, C. P., Parise, J. B., X-Ray Science Division, Stony Brook Univ., and Temple Univ. Investigation of surface structures by powder diffraction : a differential pair distribution function study on arsenate sorption on ferrihydrite.. United States: N. p., 2010. Web. doi:10.1021/ic9022695.
Harrington, R., Hausner, D. B., Bhandari, N., Strongin, D. R., Chapman, K. W., Chupas, P. J., Middlemiss, D. S., Grey, C. P., Parise, J. B., X-Ray Science Division, Stony Brook Univ., & Temple Univ. Investigation of surface structures by powder diffraction : a differential pair distribution function study on arsenate sorption on ferrihydrite.. United States. doi:10.1021/ic9022695.
Harrington, R., Hausner, D. B., Bhandari, N., Strongin, D. R., Chapman, K. W., Chupas, P. J., Middlemiss, D. S., Grey, C. P., Parise, J. B., X-Ray Science Division, Stony Brook Univ., and Temple Univ. Fri . "Investigation of surface structures by powder diffraction : a differential pair distribution function study on arsenate sorption on ferrihydrite.". United States. doi:10.1021/ic9022695.
@article{osti_983472,
title = {Investigation of surface structures by powder diffraction : a differential pair distribution function study on arsenate sorption on ferrihydrite.},
author = {Harrington, R. and Hausner, D. B. and Bhandari, N. and Strongin, D. R. and Chapman, K. W. and Chupas, P. J. and Middlemiss, D. S. and Grey, C. P. and Parise, J. B. and X-Ray Science Division and Stony Brook Univ. and Temple Univ.},
abstractNote = {Differential pair distribution function (d-PDF) analysis of high energy powder X-ray diffraction data was carried out on 2-line ferrihydrite nanoparticles with arsenate oxyanions adsorbed on the surface to investigate the binding mechanism. In this analysis, a PDF of ferrihydrite is subtracted from a PDF of ferrihydrite with arsenate sorbed on the surface, leaving only correlations from within the surface layer and between the surface and the particle. As-O and As-Fe correlations were observed at 1.68 and 3.29 {angstrom}, respectively, in good agreement with previously published EXAFS data, confirming a bidentate binuclear binding mechanism. Further peaks are observed in the d-PDF which are not present in EXAFS, corresponding to correlations between As and O in the particle and As-2nd Fe.},
doi = {10.1021/ic9022695},
journal = {Inorg. Chem.},
number = 2010,
volume = 49,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2010},
month = {Fri Jan 01 00:00:00 EST 2010}
}