Inorganic ligand effects on Pb(II) sorption to goethite (alpha-FeOOH) - II. Sulfate
(2000) In Journal of Colloid and Interface Science 225. p.483-493- Abstract
- The effects of sulfate anions on the uptake of Pb(II) onto goethite were investigated at the molecular level using in situ Pb L-III-EXAFS and ATR-FTIR spectroscopies. Macroscopic uptake data show that Pb uptake can be enhanced by at least 30% at pH 5 in the presence of 3.16 mM sulfate and that sulfate uptake at pH 7 can be enhanced by more than a factor of 3 in the presence of 1.0 mM Pb. Consistent with behavior in sulfate-free systems, Pb(II) forms inner-sphere complexes sharing either corners or edges with Fe(O,OH)(6) octahedra under all conditions studied. The relative fraction of corner-sharing complexes is, however, significantly enhanced in the presence of sulfate at pH 5, 6, and 7 (all conditions studied) and additional sulfate... (More)
- The effects of sulfate anions on the uptake of Pb(II) onto goethite were investigated at the molecular level using in situ Pb L-III-EXAFS and ATR-FTIR spectroscopies. Macroscopic uptake data show that Pb uptake can be enhanced by at least 30% at pH 5 in the presence of 3.16 mM sulfate and that sulfate uptake at pH 7 can be enhanced by more than a factor of 3 in the presence of 1.0 mM Pb. Consistent with behavior in sulfate-free systems, Pb(II) forms inner-sphere complexes sharing either corners or edges with Fe(O,OH)(6) octahedra under all conditions studied. The relative fraction of corner-sharing complexes is, however, significantly enhanced in the presence of sulfate at pH 5, 6, and 7 (all conditions studied) and additional sulfate species with Ca or lower point symmetry were noted in the presence of Pb by ATR-FTIR. Drawing on bond valence and structural constraints developed in J. D. Ostergren ef al. (2000, J. Colloid Interface Science 224, 000-000), these results indicate formation of Type A ternary complexes bonded to the surface through Pb that is bound as a bridging bidenate complex to two adjacent A-type (singly coordinated) surface oxygens (=Fe-O)(2)-Pb-OSO3). (C) 2000 Academic Press. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4332601
- author
- Ostergren, J. D. ; Brown, G. E. ; Parks, G. A. and Persson, Per LU
- publishing date
- 2000
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Colloid and Interface Science
- volume
- 225
- pages
- 483 - 493
- publisher
- Elsevier
- external identifiers
-
- scopus:0034657150
- ISSN
- 1095-7103
- DOI
- 10.1006/jcis.1999.6702
- language
- English
- LU publication?
- no
- additional info
- 2
- id
- 953a0833-c620-4ecb-bf11-65ff76094ff5 (old id 4332601)
- date added to LUP
- 2016-04-01 11:50:25
- date last changed
- 2022-04-20 22:36:12
@article{953a0833-c620-4ecb-bf11-65ff76094ff5, abstract = {{The effects of sulfate anions on the uptake of Pb(II) onto goethite were investigated at the molecular level using in situ Pb L-III-EXAFS and ATR-FTIR spectroscopies. Macroscopic uptake data show that Pb uptake can be enhanced by at least 30% at pH 5 in the presence of 3.16 mM sulfate and that sulfate uptake at pH 7 can be enhanced by more than a factor of 3 in the presence of 1.0 mM Pb. Consistent with behavior in sulfate-free systems, Pb(II) forms inner-sphere complexes sharing either corners or edges with Fe(O,OH)(6) octahedra under all conditions studied. The relative fraction of corner-sharing complexes is, however, significantly enhanced in the presence of sulfate at pH 5, 6, and 7 (all conditions studied) and additional sulfate species with Ca or lower point symmetry were noted in the presence of Pb by ATR-FTIR. Drawing on bond valence and structural constraints developed in J. D. Ostergren ef al. (2000, J. Colloid Interface Science 224, 000-000), these results indicate formation of Type A ternary complexes bonded to the surface through Pb that is bound as a bridging bidenate complex to two adjacent A-type (singly coordinated) surface oxygens (=Fe-O)(2)-Pb-OSO3). (C) 2000 Academic Press.}}, author = {{Ostergren, J. D. and Brown, G. E. and Parks, G. A. and Persson, Per}}, issn = {{1095-7103}}, language = {{eng}}, pages = {{483--493}}, publisher = {{Elsevier}}, series = {{Journal of Colloid and Interface Science}}, title = {{Inorganic ligand effects on Pb(II) sorption to goethite (alpha-FeOOH) - II. Sulfate}}, url = {{http://dx.doi.org/10.1006/jcis.1999.6702}}, doi = {{10.1006/jcis.1999.6702}}, volume = {{225}}, year = {{2000}}, }