Publication
Metal speciation dynamics in colloidal ligand dispersions. Part 3: Lability features of steady-state systems
| dc.contributor.author | Pinheiro, J. P. | |
| dc.contributor.author | Domingos, R. F. | |
| dc.contributor.author | Minor, M. | |
| dc.contributor.author | Van Leeuwen, H. P. | |
| dc.date.accessioned | 2013-12-02T15:35:56Z | |
| dc.date.available | 2013-12-02T15:35:56Z | |
| dc.date.issued | 2006 | |
| dc.date.updated | 2013-11-26T16:39:36Z | |
| dc.description.abstract | A lability criterion is developed for dynamic metal binding by colloidal ligands with convective diffusion as the dominant mode of mass transport. Scanned stripping chronopotentiometric measurements of Pb(II) and Cd(II) binding by carboxylated latex core-shell particles were in good agreement with the predicted values. The dynamic features of metal ion binding by these particles illustrate that the conventional approach of assuming a smeared-out homogeneous ligand distribution overestimates the lability of a colloidal ligand system. Due to the nature of the spatial distribution of the binding sites, the change in lability of a metal species with changing ligand concentration depends on whether the ligand concentration is varied via manipulation of the pH (degree of protonation) or via the particle concentration. In the former case the local ligand density varies, whereas in the latter case it is constant. This feature provides a useful diagnostic tool for the presence of geometrically constrained binding sites. | por |
| dc.identifier.citation | Pinheiro, J. P.; Domingos, R. F.; Minor, M.; Van Leeuwen, H. P. Metal speciation dynamics in colloidal ligand dispersions. Part 3: Lability features of steady-state systems, Journal of Electroanalytical Chemistry, 596, 1, 57-64, 2006. | por |
| dc.identifier.doi | http://dx.doi.org/10.1016/j.jelechem.2006.07.004 | |
| dc.identifier.issn | 1572-6657 | |
| dc.identifier.other | AUT: JPI01020; | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/3189 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Elsevier | por |
| dc.relation | Development of a novel methodology for dynamic trace metal speciation in natural systems using a multi-technique approach | |
| dc.subject | Metal speciation | por |
| dc.subject | Colloidal dispersions | por |
| dc.subject | Lability | por |
| dc.subject | Stripping chronopotentiometry | por |
| dc.title | Metal speciation dynamics in colloidal ligand dispersions. Part 3: Lability features of steady-state systems | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardTitle | Development of a novel methodology for dynamic trace metal speciation in natural systems using a multi-technique approach | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/POCI/POCI%2FQUI%2F56845%2F2004/PT | |
| oaire.citation.endPage | 64 | por |
| oaire.citation.issue | 1 | por |
| oaire.citation.startPage | 57 | por |
| oaire.citation.title | Journal of Electroanalytical Chemistry | por |
| oaire.citation.volume | 596 | por |
| oaire.fundingStream | POCI | |
| person.familyName | Pinheiro | |
| person.givenName | José Paulo | |
| person.identifier.orcid | 0000-0001-7925-9733 | |
| person.identifier.rid | E-8402-2013 | |
| person.identifier.scopus-author-id | 35838299700 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| rcaap.rights | openAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | 5caedbac-d2b5-4a86-91a7-083bf83edda3 | |
| relation.isAuthorOfPublication.latestForDiscovery | 5caedbac-d2b5-4a86-91a7-083bf83edda3 | |
| relation.isProjectOfPublication | dfeda2e0-72cf-448c-8e82-429ef74290a6 | |
| relation.isProjectOfPublication.latestForDiscovery | dfeda2e0-72cf-448c-8e82-429ef74290a6 |