Physico-Chemical Aspects of Metal–Fulvic Complexation

Simple item page
dc.contributor.authorKlučáková, Martinacs
dc.contributor.authorKrouská, Jitkacs
dc.contributor.authorKalina, Michalcs
dc.coverage.issue5cs
dc.coverage.volume12cs
dc.date.accessioned2024-10-14T09:03:18Z
dc.date.available2024-10-14T09:03:18Z
dc.date.issued2024-05-13cs
dc.description.abstractThe interactions of metal ions with fulvic acids were investigated from the point of view of the thermodynamic aspects of complexation as well as the size and charge of the formed complexes. Thermodynamic aspects were studied by means of isothermal titration calorimetry. Particle size distribution was determined by the method of dynamic light scattering and charge by the measurement of zeta potential. Complexation resulted in changes in particle size and charge. The particle size distribution was trimodal for fulvic acids and bimodal for fulvic complexes with calcium and magnesium, while copper–fulvic complexes had only one size fraction. The compensation of the negative charge of carboxylic and phenolic functional groups by positively charged metal ions resulted in an increase in zeta potential which became closer to zero in the case of copper–fulvic complexes. However, all metal–humic complexes behaved as colloidally unstable, which resulted in visually observable sedimentation. Calorimetric measurements provided positive values for changes in enthalpy, which indicated endothermic processes. In contrast, quantum chemical calculations as well as experiments with model compounds provided negative values indicating exothermic processes. Changes in Gibbs energy were determined as negative and changes in entropy as positive.en
dc.description.abstractInterakce fulvinových kyselin s kovovými ionty jsou sledovány pomocí titrační kalorimetrie, která poskytla základní fyzikálně chemické charakteristiky. Doplněna byla stanovením distribuce velikosti částic a zeta potenciálu.cs
dc.formattextcs
dc.format.extent1-13cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationProcesses. 2024, vol. 12, issue 5, p. 1-13.en
dc.identifier.doi10.3390/pr12050989cs
dc.identifier.issn2227-9717cs
dc.identifier.orcid0000-0003-4969-6988cs
dc.identifier.orcid0000-0002-4461-4085cs
dc.identifier.orcid0000-0002-4224-0841cs
dc.identifier.other188599cs
dc.identifier.scopus7006307069cs
dc.identifier.urihttps://hdl.handle.net/11012/249467
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofProcessescs
dc.relation.urihttps://www.mdpi.com/2227-9717/12/5/989cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2227-9717/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectfulvic aciden
dc.subjectmetal ionen
dc.subjectinteractionen
dc.subjectthermodynamicsen
dc.subjectparticle sizeen
dc.subjectchargeen
dc.subjectfulvinové kyseliny
dc.subjectkovové ionty
dc.subjectinterakce
dc.subjecttermodynamika
dc.subjectvelikost částic
dc.subjectnáboj
dc.titlePhysico-Chemical Aspects of Metal–Fulvic Complexationen
dc.title.alternativeFyzikálně chemické aspekty komplexace fulvinových kyselin s kovovými iontycs
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-188599en
sync.item.dbtypeVAVen
sync.item.insts2024.10.14 11:03:18en
sync.item.modts2024.09.20 14:32:05en
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Ústav fyzikální a spotřební chemiecs
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
processes1200989.pdf
Size:
1.29 MB
Format:
Adobe Portable Document Format
Description:
file processes1200989.pdf
Download
Collections
Ústav fyzikální a spotřební chemie