Complexation of Copper(II) with Humic Acids Studied by Ultrasound Spectrometry

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dc.contributor.authorKlučáková, Martinacs
dc.coverage.issue5cs
dc.coverage.volume2012cs
dc.date.accessioned2019-04-03T03:54:56Z
dc.date.available2019-04-03T03:54:56Z
dc.date.issued2012-05-14cs
dc.description.abstractCopper biogeochemistry is controlled by bonding to natural organic matter. The soluble forms of bonded copper can be more biologically active due to the higher migration in environmental systems and instability of some copper-humic complexes. In this work, the interactions of copper(II) ions with humic acids are studied by means of high-resolution ultrasound spectrometry. It was found that the stoichiometry of the formed complexes is strongly influenced by the organization of humic acid in solution and by the final pH value in equilibrium. Although the ratio between the added copper and humic acids in all used concentrations was constant and the initial pH value was neutral, we observed significant differences between the individual systems. The highest binding ability was determined for a humic content of 0.5 g/dm3.More diluted and more concentrated systems were able to bind lower amounts of copper. The implemented method is very sensitive and can be utilized not only for monitoring copper binding but also as an indicator of conformational changes of humic acid in solutions with varying concentration.en
dc.description.abstractPomocí vysoce rozlišovací ultrazvukové spektrometrie byla studována komplexace Cu(II) iontů s huminovými kyselinami. Bylo zjištěno, že stechiometrie a prostorové uspořádání vzniklých komplexů silně závisí na pH a počáteční koncentraci huminového roztoku. Významné změny v konformaci a molekulární organizaci byly pozorovány pro roztoky s počteční koncentrací 0,5 - 1 g/dm3.cs
dc.formattextcs
dc.format.extent1-6cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationOrganic Chemistry International. 2012, vol. 2012, issue 5, p. 1-6.en
dc.identifier.doi10.1155/2012/206025cs
dc.identifier.issn2090-200Xcs
dc.identifier.other92821cs
dc.identifier.urihttp://hdl.handle.net/11012/68388
dc.language.isoencs
dc.publisherHindawi Publishing Corporationcs
dc.relation.ispartofOrganic Chemistry Internationalcs
dc.relation.urihttps://www.hindawi.com/journals/oci/2012/206025/cs
dc.rightsCreative Commons Attribution 3.0 Unportedcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2090-200X/cs
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/cs
dc.subjecthumic acidsen
dc.subjectcomplexationen
dc.subjectkonformaceen
dc.subjectmolekulární organizaceen
dc.subjectcopperen
dc.subjectultrasound spectrometryen
dc.subjecthuminové kyseliny
dc.subjectkomplexace
dc.subjectkonformace
dc.subjectmolekulární organizace
dc.subjectměď
dc.subjectultrazvuková spektrometrie
dc.titleComplexation of Copper(II) with Humic Acids Studied by Ultrasound Spectrometryen
dc.title.alternativeKomplexace Cu(II) iontů s huminovými kyselinami - ultrazvuková studiecs
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-92821en
sync.item.dbtypeVAVen
sync.item.insts2020.03.31 00:57:34en
sync.item.modts2020.03.30 22:58:54en
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Ústav fyzikální a spotřební chemiecs
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