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Martina Kovalčíková, Adriana Eštoková
Monitoring of heavy metal concentrations in concrete leachates
| Conference Information: |
9th International Conference on Environmental
Engineering, MAY 22-23, 2014 Vilnius, LITHUANIA |
| Source: |
ICEE-2014 - International Conference on Environmental
Engineering |
| Book Series: |
International Conference on Environmental Engineering
(ICEE) Selected papers |
| ISSN: |
ISSN 2029-7092 online |
| ISBN: |
978-609-457-640-9 / 978-609-457-690-4 CD |
| Year: |
2014 |
| Publisher: |
Vilnius Gediminas Technical University Press Technika |
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Abstract
The papers presents the results of monitoring of various heavy metals leaching from concrete samples based on ordinary CEM I Portland
cement without any additives and with silica fume exposed to the sulphate environments. The leaching experiments of compact cement
composites proceeded during 180-day period in various aggressive and reference media (H2SO4, MgSO4, fresh water). The concentrations
of manganese (Mn), iron (Fe), copper (Cu) and cobalt (Co) ions in liquid media were measured. Only a small part of total metal content
was extracted from concrete samples into the liquid media (up to 17% for manganese and 0.3% for iron). Concrete samples with
microsilica were found to have better performance in terms of leaching of Mn, Fe, Co and Cu ions than samples without microsilica. The
most significant effect of sulphuric acid as aggressive environment causing analyzed metals releasing was confirmed.
Keywords: Cement; concrete; leaching; heavy metals.
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