Effect of internal polyurethane coatings of cast iron pipes on the quality of transported potable water

• Autorzy: Zielina Michał , Młyńska Anna

Identyfikatory

DOI

10.37190/epe220303

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of laboratory tests to determine the effect of an internal polyurethane coating in ductile iron pipes on the quality of disinfected and non-disinfected drinking water. A decrease in the pH of water in contact with the polyurethane coating was found, which was slightly higher in the non-disinfected water than in the disinfected water. The coefficient of variation (CV) of the pH values for the chlorinated water samples was 5.02% and for the non-chlorinated water was 7.15%. The experiments also showed a rather large effect of polyurethane liner on the increase of TOC concentration in water. The presence of disinfectant further slightly increased the amount of organic compounds released. The CV values normalized to one day for TOC were as high as 193.32% and even 199.39% for disinfected water. A significant effect of polyurethane coating was observed on the color change and odor of water. On the other hand, there was no effect of polyurethane coating on alkalinity and chlorine consumption in water. The CV values normalized to one day in both cases were very small at 0.97% and 0.53%, respectively.

Słowa kluczowe

EN

drinking water; polyurethane coating; iron; pH value; CV; coefficient of variation

PL

woda pitna; powłoka poliuretanowa; żeliwo; wartość pH; CV; współczynnik zmienności

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2022
• Tom: Vol. 48, nr 3
• Strony: 25--38
• Opis fizyczny: Bibliogr. 17 poz., rys., tab.

Twórcy

autor

Zielina Michał

• Department of Water Supply, Sewerage and Environmental Monitoring, Faculty of Environmental Engineering and Energy, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland

• https://orcid.org/0000-0001-7710-8982

autor

Młyńska Anna

• Department of Water Supply, Sewerage and Environmental Monitoring, Faculty of Environmental Engineering and Energy, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland

• https://orcid.org/0000-0003-4790-9783

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