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Geologos

The Journal of Adam Mickiewicz University

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Volume 20, Issue 1

Assessment of metal concentrations in tap-water – from source to the tap: a case study from Szczecin, Poland

Józef Górski
  • Institute of Geology, Department of Hydrogeology and Water Protection, Adam Mickiewicz University, Maków Polnych 16, 61-606 Poznań, Poland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Marcin Siepak
  • Corresponding author
  • Institute of Geology, Department of Hydrogeology and Water Protection, Adam Mickiewicz University, Maków Polnych 16, 61-606 Poznań, Poland
  • Email
  • Other articles by this author:
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Published Online: 2014-05-17 | DOI: https://doi.org/10.2478/logos-2014-0004

Abstract

The concentrations of Al, As, Cd, Cu, Pb, Zn, Ni, Fe and Mn were determined in June 2010 for 100 tap-water samples, collected directly at consumers in the older part of the city of Szczecin (Poland). Increased concentrations of metals were thus detected. This concerns mainly Fe (19% of samples showed concentrations above drinking-water quality standards) and Pb (5%). In some samples, the maximum admissible concentration levels for Mn, Cu and Ni were also exceeded. This was not the case for Al, despite the use of aluminium compounds during water treatment; the Al concentrations in treated water were, however, significantly higher than in raw water.

It was also found that (1) the corrosive properties of water (low alkalinity and increased concentration of sulphates), (2) the water-treatment processes causing a decrease of the pH and an increase of the CO2, and (3) transport of the treated water over long distances (30 km) provide favourable conditions for the leaching of metals from water-pipe networks. The type of material used in domestic plumbing and the content of Ce, Fe, Mn, Ni and Cd in the tap-water at consumers show a correlation. The high content of Pb is mainly a result of lead pipes connecting the network to the buildings

Keywords : chemical quality; water-distribution networks; metals; tap-water

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About the article

Received: 2013-05-15

Accepted: 2014-02-25

Published Online: 2014-05-17

Published in Print: 2014-03-01


Citation Information: Geologos, Volume 20, Issue 1, Pages 25–33, ISSN (Online) 2080-6574, ISSN (Print) 1426-8981, DOI: https://doi.org/10.2478/logos-2014-0004.

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© 2014. This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. BY-NC-ND 3.0

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