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

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F16%3APU119795" target="_blank" >RIV/00216305:26310/16:PU119795 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1877705816317702" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1877705816317702</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.proeng.2016.07.382" target="_blank" >10.1016/j.proeng.2016.07.382</a>

Result language
angličtina
Original language name
Hexavalent chromium reduction by ferrous sulphate heptahydrate addition into the Portland clinker
Original language description
Nowadays, 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.
Czech name
—
Czech description
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Project
<a href="/en/project/LO1211" target="_blank" >LO1211: Materials Research Centre at FCH BUT- Sustainability and Development</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
International Conference on Ecology and new Building materials and products, ICEBMP 2016
ISBN
—
ISSN
1877-7058
e-ISSN
—
Number of pages
7
Pages from-to
73-79
Publisher name
Elsevier
Place of publication
neuveden
Event location
Černá Hora
Event date
May 31, 2016
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
000387482800010

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