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dc.contributor.authorRey Castro, Carlos
dc.contributor.authorMongin, Sandrine
dc.contributor.authorHuidobro Redondo, César
dc.contributor.authorDavid, Calin
dc.contributor.authorSalvador, José
dc.contributor.authorGarcés, Josep Lluís
dc.contributor.authorGalceran i Nogués, Josep
dc.contributor.authorMas i Pujadas, Francesc
dc.contributor.authorPuy Llorens, Jaume
dc.date.accessioned2016-12-12T11:33:58Z
dc.date.issued2009
dc.identifier.issn0013-936X
dc.identifier.urihttp://hdl.handle.net/10459.1/58798
dc.description.abstractThe effective distribution of affinities (Conditional Affinity Spectrum, CAS) seen by ametal ion bindingto a humic substance under natural water conditions is derived and discussed within the NICA-Donnan model. Analytical expressions for the average affinity of these distributions in general multi-ion mixtures are reported here for the first time. These expressions enable a simple evaluation of the effect of all interfering cations on the affinity distribution of a given one. We illustrate this methodology by plotting the affinity spectra of a generic fulvic acidfor14 different cationsinthe presence ofmajorinorganic ions and trace metals at pH and concentration values representative of a river water. The distribution of occupied sites andtheir average affinity atthetypicalfreshwater conditions are also reported for each ion. The CAS allows us to distinguish three groups of cations: (a) Al, H, Pb, Hg, and Cr, which are preferentially bound to the phenolic sites of the fulvic ligand; (b) Ca, Mg, Cd, Fe(II), and Mn, which display a greater effective affinityfor carboxylic sites, in contrastto what would be expected from their individual complexation parameters; and (c) Fe(III), Cu, Zn, and Ni, for which phenolic and carboxylic distributions are overlapped.ca_ES
dc.description.sponsorshipWe gratefully acknowledge support of this research by the Spanish Ministry of Education and Science (Projects CTQ2006-14385 and CTM2006-13583) and from the “Comissionat d’Universitats i Recerca de la Generalitat de Catalunya”. S. Mongin was supported by an FPI-MEC grant from the Spanish Government.ca_ES
dc.language.isoengca_ES
dc.publisherAmerican Chemical Societyca_ES
dc.relationMIECI/PN2004-2007/CTQ2006-14385ca_ES
dc.relationMIECI/PN2004-2007/CTM2006-13583ca_ES
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.1021/es803006pca_ES
dc.relation.ispartofEnvironmental Science and Technology, 2009, vol. 43, núm. 19, p. 7184-7191ca_ES
dc.rights(c) American Chemical Society, 2009ca_ES
dc.titleEffective affinity distribution for the binding of metal Ions to a generic fulvic acid in natural watersca_ES
dc.typearticleca_ES
dc.identifier.idgrec014006
dc.type.versionpublishedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccessca_ES
dc.identifier.doihttps://doi.org/10.1021/es803006p
dc.date.embargoEndDate10000-01-01


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