XAFS studies of Pb(II)-chloro and Hg(II)-chloro ternary complexes on goethite
(1997) In Journal de Physique IV 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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4332669
- author
- Bargar, J. R. ; Persson, Per LU and Brown, G. E.
- publishing date
- 1997
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal de Physique IV
- volume
- 7
- pages
- 825 - 826
- publisher
- EDP Sciences
- external identifiers
-
- scopus:0031122896
- ISSN
- 1155-4339
- DOI
- 10.1051/jp4:1997249
- language
- English
- LU publication?
- no
- additional info
- C2
- id
- 0b517743-9626-406c-9b41-5a11e86a4d78 (old id 4332669)
- date added to LUP
- 2016-04-01 11:55:54
- date last changed
- 2022-01-26 20:21:42
@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 = {{1155-4339}}, language = {{eng}}, pages = {{825--826}}, publisher = {{EDP Sciences}}, series = {{Journal de Physique IV}}, title = {{XAFS studies of Pb(II)-chloro and Hg(II)-chloro ternary complexes on goethite}}, url = {{http://dx.doi.org/10.1051/jp4:1997249}}, doi = {{10.1051/jp4:1997249}}, volume = {{7}}, year = {{1997}}, }