Hexavalent chromium reduction by ferrous sulphate heptahydrate addition into the Portland clinker

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dc.contributor.authorMončeková, Miroslavacs
dc.contributor.authorNovotný, Radoslavcs
dc.contributor.authorKoplík, Jancs
dc.contributor.authorKalina, Lukášcs
dc.contributor.authorBílek, Vlastimilcs
dc.contributor.authorŠoukal, Františekcs
dc.coverage.issue1cs
dc.coverage.volume151cs
dc.date.accessioned2022-05-10T14:54:11Z
dc.date.available2022-05-10T14:54:11Z
dc.date.issued2016-08-01cs
dc.description.abstractNowadays, hexavalent chromium and its content in Portland cement is very actual and often discussed topic. The goal of this study was to observe the influence of different ways of addition of ferrous sulphate heptahydrate on the reduction of hexavalent chromium at the hydration of Portland clinker. Ferrous sulphate heptahydrate was added as crystalline powder and also in an aqueous solution. Obtained experimental results clearly showed higher reduction ability of a liquid form compared to the solid substance. The influence of the grain size on the reduction of hexavalent chromium was inve stigated immediately after mixing clinker with water and also during the first days of hydration process. New oxidation layer containing Fe3+species forms around the non- oxidation part of sulphate species. That is why larger grain size showed lower reduction ability of chromium. In this case the additional chromium reduction effect was observed during the first days of hydration. The results were acquired by UV/VIS method according to STN EN 196-10.en
dc.formattextcs
dc.format.extent73-79cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationProcedia Engineering. 2016, vol. 151, issue 1, p. 73-79.en
dc.identifier.doi10.1016/j.proeng.2016.07.382cs
dc.identifier.issn1877-7058cs
dc.identifier.other127100cs
dc.identifier.urihttp://hdl.handle.net/11012/204200
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofProcedia Engineeringcs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S1877705816317702cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1877-7058/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectHexavalent chromiumen
dc.subjectreductionen
dc.subjectPortland clinkeren
dc.subjectferrous sulphate heptahydrateen
dc.titleHexavalent chromium reduction by ferrous sulphate heptahydrate addition into the Portland clinkeren
dc.type.driverconferenceObjecten
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-127100en
sync.item.dbtypeVAVen
sync.item.insts2022.05.10 16:54:11en
sync.item.modts2022.05.10 16:14:19en
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. CMV - laboratoř anorganických materiálůcs
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