Description: 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
Global identifier:
Doi(
"10.60810/openumwelt-1855",
)
Origin: /Bund/UBA/openUMWELT
Tags: Toluol ? Xylol ? Kunststoff ? MTBE ? Polyethylen ? Lösungsmittel ? Pflanzensamen ? GC-MS ? Olfaktometrie ? Warmwasser ? Chemikalien ? Geruch ? Trinkwasser ? Wasser ? Stoff ? Migration ? Rohrleitung ? Schwellenwert ? Gewässer ? Siebung ?
License: other-closed
Language: Englisch/English
Issued: 2019-01-01
Time ranges: 2019-01-01 - 2019-01-01
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