Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/107434
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Melia Rodrigo, M. | - |
dc.contributor.author | Cabral, Ana M. T. D. P. V. | - |
dc.contributor.author | Nicolau, Pedro M. G. | - |
dc.contributor.author | Ribeiro, Ana C. F. | - |
dc.contributor.author | Valente, Artur J. M. | - |
dc.contributor.author | Fangaia, Sónia I. G. | - |
dc.contributor.author | Esteso, Miguel Á. | - |
dc.date.accessioned | 2023-07-11T11:07:34Z | - |
dc.date.available | 2023-07-11T11:07:34Z | - |
dc.date.issued | 2023 | - |
dc.identifier.issn | 00219614 | pt |
dc.identifier.uri | https://hdl.handle.net/10316/107434 | - |
dc.description.abstract | Ternary mutual diffusion coefficients (D11, D22, D12, and D21) in aqueous solutions of citric acid (H3Cit) (component 1) plus potassium dihydrogen citrate (KH2Cit) (component 2) at 298.15 K and concentrations up to 0.040 mol dm 3 were measured using a Taylor scattering method. The obtaining of the negative values for D12 and D21 cross coefficients, mainly in dilute solutions and for the first ones, indicates that there is a strongly coupled diffusion of these components. In fact, the concentration gradients of KH2Cit drive substantial counter current coupled flows of H3Cit citric acid, indicating that each mol of diffusing potassium dihydrogen citrate can counteract the transport of up to 0.74 mol of citric acid, approximately. A better interpretation of the electrostatic mechanism for the coupled diffusion of KH2Cit and H3Cit was achieved based on the values predicted by the Nernst-Planck equations, having been verified as a good agreement between them and experimental data. | pt |
dc.description.sponsorship | The authors are grateful for funding from “The Coimbra Chemistry Centre” which is supported by the Fundaç˜ao para a Ciˆencia e a Tecnologia (FCT), Portuguese Agency for Scientific Research, through the projects UIDB/QUI/UI0313/2020 and COMPETE Programme (Operational Programme for Competitiveness) and CIROS. M.M.R. is thankful to the University of Alcal´a for the financial assistance (Mobility Grants for Researches-2021). | pt |
dc.language.iso | eng | pt |
dc.publisher | Elsevier | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/UID/QUI/UI0313/2020 | pt |
dc.rights | embargoedAccess | pt |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | pt |
dc.subject | Citric acid | pt |
dc.subject | Diffusion | pt |
dc.subject | Nernst-Planck | pt |
dc.subject | Potassium dihydrogen citrate | pt |
dc.subject | Transport properties | pt |
dc.title | Effect of potassium dihydrogen citrate on the diffusion behaviour of citric acid | pt |
dc.type | article | - |
degois.publication.firstPage | 106996 | pt |
degois.publication.title | The Journal of Chemical Thermodynamics | pt |
dc.peerreviewed | yes | pt |
dc.identifier.doi | 10.1016/j.jct.2022.106996 | pt |
degois.publication.volume | 179 | pt |
dc.date.embargo | 2024-12-31 | * |
uc.date.periodoEmbargo | 730 | pt |
item.fulltext | Com Texto completo | - |
item.grantfulltext | embargo_20241231 | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.openairetype | article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
crisitem.author.researchunit | CQC - Coimbra Chemistry Centre | - |
crisitem.author.researchunit | CEMMPRE - Centre for Mechanical Engineering, Materials and Processes | - |
crisitem.author.researchunit | CQC - Coimbra Chemistry Centre | - |
crisitem.author.researchunit | CQC - Coimbra Chemistry Centre | - |
crisitem.author.researchunit | CQC - Coimbra Chemistry Centre | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.orcid | 0000-0002-2912-0028 | - |
crisitem.author.orcid | 0000-0001-7900-4482 | - |
crisitem.author.orcid | 0000-0002-3005-1963 | - |
crisitem.author.orcid | 0000-0002-4612-7686 | - |
crisitem.author.orcid | 0000-0001-9736-3999 | - |
Appears in Collections: | FMUC Medicina - Artigos em Revistas Internacionais FFUC- Artigos em Revistas Internacionais I&D CQC - Artigos em Revistas Internacionais |
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File | Description | Size | Format | Login |
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Rodrigo2023JChemThermod.pdf | 2.21 MB | Adobe PDF | Embargo Access Request a copy |
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