Gibbs-Donnan and specific ion interaction theory descriptions of the effect of ionic strength on proton dissociation of alginic acid
MetadataShow full item record
The apparent proton dissociation constants of a commercial alginic acid have been obtained in KNO3 and NaCl at concentrations ranging between 0.01 and 2 mol·L-1. An analysis of the dependence on the ionic strength at a constant value of the dissociation degree was done by means of empirical functions derived from the Gibbs-Donnan formalism for polyelectrolytes and a specific ion interaction theory (SIT). Both functions were able to fit the experimental data, although SIT yielded rather high errors in the fitted parameters due to a problem of multicollinearity, in contrast to the function derived from the Gibbs-Donnan approach.
Is part ofJournal of Electroanalytical Chemistry, 2004, vol. 564, p. 223-230
European research projects
Showing items related by title, author, creator and subject.
Experimental evidences for a new model in the description of the adsorption-coupled reduction of Cr(VI) by protonated banana skin López García, Marta; Lodeiro, Pablo; Herrero, Roberto; Barriada, José L.; Rey Castro, Carlos; David, Calin; Sastre de Vicente, Manuel E. (Elsevier, 2013)This work reports experimental evidences, not previously considered, to evaluate the Cr(VI) removal by protonated banana skin biomass. Variations in the number of hydroxyl groups, quantified by potentiometric titrations, ...
Acid-base properties of brown seaweed biomass considered as a Donnan gel. A model reflecting electrostatic effects and chemical heterogeneity Rey Castro, Carlos; Lodeiro, Pablo; Herrero, Roberto; Sastre de Vicente, Manuel E. (American Chemical Society, 2003)Brown seaweeds are interesting materials to be used as biosorbents for heavy metals due to their high binding ability and low cost. The study of the passive biosorption of protons on this kind of materials and its ...
Herrero, Roberto; Cordero Pérez, Bruno; Lodeiro, Pablo; Rey Castro, Carlos; Sastre de Vicente, Manuel E. (Elsevier, 2006)Samples of dead biomass from the marine brown algae Fucus ceranoides, F. vesiculosus and F.serratus were studied for their ability to remove cadmium from aqueous solutions. The metal sorption process is rapid, with 90% ...