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Publikationstyp
Wissenschaftlicher Artikel
Erscheinungsjahr
2019
Contaminants migrating from crossed-linked polyethylene pipes and their effect on drinking water odour
Contaminants migrating from crossed-linked polyethylene pipes and their effect on drinking water odour
Autor:innen
Herausgeber
Quelle
Water Research
161 (2019)
161 (2019)
Schlagwörter
Geruch, Migration, Siebung, Olfaktometrie
Zitation
KALWEIT, Cynthia, Ernst STOTTMEISTER und Thomas RAPP, 2019. Contaminants migrating from crossed-linked polyethylene pipes and their effect on drinking water odour. Water Research [online]. 2019. Bd. 161 (2019). DOI 10.60810/openumwelt-1855. Verfügbar unter: https://openumwelt.de/handle/123456789/4840
Zusammenfassung englisch
The formation potential of contaminants diffusing from cross-linked polyethylene (PE-X) pipes and their impact on the odour of drinking water was determined. Three types of PE-X material, Pe-Xa, PE-Xb and PE-Xc, were extensively assessed by performing migration tests following EN 1420 and EN 12873-1. Migration waters were analysed for their threshold odour number (TON). The same samples were investigated by two gas chromatography-mass spectrometry methods: screening and olfactometry. Most of the PE-X materials failed the German regulation of TON <2 for cold water and TON <4 for warm water. PE-Xb material caused the strongest odour and also released the highest amount of contaminants. Metilox, 7,9-di-tert-butyl-1-oxaspiro(4,5)deca-6,9-diene-2,8-dione, 3,5-di-tert-butyl-4-hydroxybenzaldehyde and 2,6-di-tert-butyl-p-benzoquinone (2,6-DtBQ) were the most often detected substances leaching from the tested plastic materials. However, no odour was perceived for most of these substances. Methyl tert-butyl ether (MtBE) and 2-tert-butylphenol are believed to contribute to the sensory problem in the migration water among other substances such as tert-amyl methyl ether, 2,2,2,5-tetramethyltetrahydrofuran, toluene or xylene. In total ten specific descriptions characterized the odour of the individual contaminants: ethereal, fresh, solvent, sweet, fruity, floral, unsavoury, pungent, aromatic and chemical. Quelle: https://www.sciencedirect.com