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Benzenecarboxylate surface complexation at the goethite (alpha-FeOOH)/water interface - III. The influence of particle surface area and the significance of modeling parameters

Boily, J. F.; Persson, Per LU and Sjoberg, S. (2000) In Journal of Colloid and Interface Science 227. p.132-140
Abstract
A surface complexation model describing the adsorption of three benzenecarboxylates (phthalate, trimellitate, and pyromellitate) on goethite (alpha-FeOOH) was calibrated on data using goethite particles of 37 and 43 m(2)/g surface area. The models predict potentiometric titration and batch adsorption data with the multisite complexation model coupled with the three-plane model to account for surface electrostatics. The modeling parameters were found to be similar to those calibrated on benzenecarboxylate adsorption data on goethite particles of 90 m(2)/g (Boily et al. Geochim. Cosmochim. Acta, in press). The significance of the benzenecarboxylate-dependent values of the modeling parameters is also discussed. The values of the capacitances... (More)
A surface complexation model describing the adsorption of three benzenecarboxylates (phthalate, trimellitate, and pyromellitate) on goethite (alpha-FeOOH) was calibrated on data using goethite particles of 37 and 43 m(2)/g surface area. The models predict potentiometric titration and batch adsorption data with the multisite complexation model coupled with the three-plane model to account for surface electrostatics. The modeling parameters were found to be similar to those calibrated on benzenecarboxylate adsorption data on goethite particles of 90 m(2)/g (Boily et al. Geochim. Cosmochim. Acta, in press). The significance of the benzenecarboxylate-dependent values of the modeling parameters is also discussed. The values of the capacitances of the inner- and outer-Helmholtz planes were shown to be important modeling parameters to model the benzenecarboxylate-dependent slopes of the adsorption edges. It was shown that the larger the charge of the ligand, the larger the capacitance of the outer-Helmholtz plane. (C) 2000 Academic Press. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Colloid and Interface Science
volume
227
pages
132 - 140
publisher
Elsevier
external identifiers
  • scopus:0034235220
ISSN
1095-7103
DOI
10.1006/jcis.2000.6886
language
English
LU publication?
no
id
19d62679-8f1b-4840-82e2-a299d38c73cc (old id 4332606)
date added to LUP
2014-03-04 09:43:10
date last changed
2017-01-01 04:48:58
@article{19d62679-8f1b-4840-82e2-a299d38c73cc,
  abstract     = {A surface complexation model describing the adsorption of three benzenecarboxylates (phthalate, trimellitate, and pyromellitate) on goethite (alpha-FeOOH) was calibrated on data using goethite particles of 37 and 43 m(2)/g surface area. The models predict potentiometric titration and batch adsorption data with the multisite complexation model coupled with the three-plane model to account for surface electrostatics. The modeling parameters were found to be similar to those calibrated on benzenecarboxylate adsorption data on goethite particles of 90 m(2)/g (Boily et al. Geochim. Cosmochim. Acta, in press). The significance of the benzenecarboxylate-dependent values of the modeling parameters is also discussed. The values of the capacitances of the inner- and outer-Helmholtz planes were shown to be important modeling parameters to model the benzenecarboxylate-dependent slopes of the adsorption edges. It was shown that the larger the charge of the ligand, the larger the capacitance of the outer-Helmholtz plane. (C) 2000 Academic Press.},
  author       = {Boily, J. F. and Persson, Per and Sjoberg, S.},
  issn         = {1095-7103},
  language     = {eng},
  pages        = {132--140},
  publisher    = {Elsevier},
  series       = {Journal of Colloid and Interface Science},
  title        = {Benzenecarboxylate surface complexation at the goethite (alpha-FeOOH)/water interface - III. The influence of particle surface area and the significance of modeling parameters},
  url          = {http://dx.doi.org/10.1006/jcis.2000.6886},
  volume       = {227},
  year         = {2000},
}