Benzenecarboxylate surface complexation at the goethite (α-FEOOH)/water interface. III. The influence of particle surface area and the significance of modeling parameters
2000 (English)In: Journal of colloid and interface science, Vol. 227, no 1, 132-40 p.Article in journal (Refereed) Published
A surface complexation model describing the adsorption of three benzenecarboxylates (phthalate, trimellitate, and pyromellitate) on goethite (α-FeOOH) was calibrated on data using goethite particles of 37 and 43 m/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/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.
Place, publisher, year, edition, pages
2000. Vol. 227, no 1, 132-40 p.
Experimental study, Liquid solid adsorption, Surface complex, Goethite, Benzene derivatives, Modeling, Surface area, Structure effect, Carboxylate
IdentifiersURN: urn:nbn:se:umu:diva-8970OAI: oai:DiVA.org:umu-8970DiVA: diva2:148641