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XAFS studies of Pb(II)-chloro and Hg(II)-chloro ternary complexes on goethite

Bargar, J. R.; Persson, Per LU and Brown, G. E. (1997) In Journal de Physique IV: Proceedings 7. p.825-826
Abstract
EXAFS spectroscopy was used to study Pb(II) and Hg(II) adsorption complexes on goethite (alpha-FeOOH) in the presence of Cl-. At pH 7, the dominant Pb(II) species are bonded to edges of FeO6 octahedra and are similar to complexes that occur in the absence of Cl-. At pH less than or equal to 6, Pb(II)-chloro ternary complexes predominate and are bonded to corners of FeO6 octahedra. At pH 6.5, linear HO(OH)Cl ternary complexes predominate that are bonded to goethite through surface oxygens in a bent Hg-O-Fe geometry. In the absence of Cl-, the Hg(II) surface complexes retain this basic geometry, but an OH group replaces the chloride ion in the first coordination shell.
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal de Physique IV: Proceedings
volume
7
pages
825 - 826
publisher
EDP Sciences
external identifiers
  • scopus:0031122896
ISSN
1764-7177
DOI
10.1051/jp4:1997249
language
English
LU publication?
no
id
0b517743-9626-406c-9b41-5a11e86a4d78 (old id 4332669)
date added to LUP
2014-03-04 09:44:24
date last changed
2017-03-19 03:28:35
@article{0b517743-9626-406c-9b41-5a11e86a4d78,
  abstract     = {EXAFS spectroscopy was used to study Pb(II) and Hg(II) adsorption complexes on goethite (alpha-FeOOH) in the presence of Cl-. At pH 7, the dominant Pb(II) species are bonded to edges of FeO6 octahedra and are similar to complexes that occur in the absence of Cl-. At pH less than or equal to 6, Pb(II)-chloro ternary complexes predominate and are bonded to corners of FeO6 octahedra. At pH 6.5, linear HO(OH)Cl ternary complexes predominate that are bonded to goethite through surface oxygens in a bent Hg-O-Fe geometry. In the absence of Cl-, the Hg(II) surface complexes retain this basic geometry, but an OH group replaces the chloride ion in the first coordination shell.},
  author       = {Bargar, J. R. and Persson, Per and Brown, G. E.},
  issn         = {1764-7177},
  language     = {eng},
  pages        = {825--826},
  publisher    = {EDP Sciences},
  series       = {Journal de Physique IV: Proceedings},
  title        = {XAFS studies of Pb(II)-chloro and Hg(II)-chloro ternary complexes on goethite},
  url          = {http://dx.doi.org/10.1051/jp4:1997249},
  volume       = {7},
  year         = {1997},
}