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
English Title
Hexavalent chromium reduction by ferrous sulphate heptahydrate addition into the Portland clinker
Type
conference paper
Language
en
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.
English 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
Released
01.08.2016
ISBN
1877-7058
Periodical
Procedia Engineering
Year of study
151
Number
2016
State
NL
Pages from
73
Pages to
79
Pages count
7
Documents
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",
annote="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.",
booktitle="International Conference on Ecology and new Building materials and products, ICEBMP 2016",
chapter="127100",
doi="10.1016/j.proeng.2016.07.382",
howpublished="online",
number="2016",
year="2016",
month="august",
pages="73--79",
type="conference paper"
}