Detail publikace

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

MONČEKOVÁ, M. NOVOTNÝ, R. KOPLÍK, J. KALINA, L. BÍLEK, V. ŠOUKAL, F.

Originální název

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

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

Hexavalent chromium; reduction; Portland clinker; ferrous sulphate heptahydrate

Autoři

MONČEKOVÁ, M.; NOVOTNÝ, R.; KOPLÍK, J.; KALINA, L.; BÍLEK, V.; ŠOUKAL, F.

Vydáno

1. 8. 2016

Nakladatel

Elsevier

ISSN

1877-7058

Periodikum

Procedia Engineering

Ročník

151

Číslo

1

Stát

Nizozemsko

Strany od

73

Strany do

79

Strany počet

7

URL

https://www.sciencedirect.com/science/article/pii/S1877705816317702

Plný text v Digitální knihovně

http://hdl.handle.net/11012/204200

BibTex

@inproceedings{BUT127100,
  author="Miroslava {Mončeková} and Radoslav {Novotný} and Jan {Koplík} and Lukáš {Kalina} and Vlastimil {Bílek} and František {Šoukal}",
  title="Hexavalent chromium reduction by ferrous sulphate heptahydrate addition into the Portland clinker",
  booktitle="International Conference on Ecology and new Building materials and products, ICEBMP 2016",
  year="2016",
  journal="Procedia Engineering",
  volume="151",
  number="1",
  pages="73--79",
  publisher="Elsevier",
  doi="10.1016/j.proeng.2016.07.382",
  issn="1877-7058",
  url="https://www.sciencedirect.com/science/article/pii/S1877705816317702"
}