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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/LO1211" target="_blank" >LO1211: Centrum materiálového výzkumu na FCH VUT v Brně - udržitelnost a rozvoj</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

International Conference on Ecology and new Building materials and products, ICEBMP 2016

ISBN

—

ISSN

1877-7058

e-ISSN

—

Počet stran výsledku

7

Strana od-do

73-79

Název nakladatele

Elsevier

Místo vydání

neuveden

Místo konání akce

Černá Hora

Datum konání akce

31. 5. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000387482800010