Publication detail

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

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

Original Title

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

Type

conference paper

Language

English

Original Abstract

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.

Keywords

Hexavalent chromium; reduction; Portland clinker; ferrous sulphate heptahydrate

Authors

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

Released

1. 8. 2016

Publisher

Elsevier

ISBN

1877-7058

Periodical

Procedia Engineering

Year of study

151

Number

1

State

Kingdom of the Netherlands

Pages from

73

Pages to

79

Pages count

7

URL

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

Full text in the Digital Library

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"
}