The profile of contamination with alkylphenol ethoxylates of some Israeli watercourse rivers and their sediment layers
| Autor: | U. Zoller, M. Houshan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
TC401-506
Alkylphenol Water supply for domestic and industrial purposes 020209 energy endocrine disrupting chemicals (edcs) Sediment 02 engineering and technology environmentally persistent 010501 environmental sciences Contamination 01 natural sciences River lake and water-supply engineering (General) Environmental chemistry 0202 electrical engineering electronic engineering information engineering Environmental science homological distribution alkylphenol ethoxylats (apeos) rivers’ water and sediments TD201-500 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Water Supply, Vol 21, Iss 1, Pp 108-113 (2021) |
| ISSN: | 1607-0798 1606-9749 |
| Popis: | The ‘hard’ non-biodegradable alkylphenol ethoxylates (APEOs) nonionic surfactants are environmentally persistent and widely used worldwide. The aim of this work is to determine the total concentration and the homological distribution in rivers and there sediments, in central Israel. The concentrations of APEOs in the water of these rivers and in their sediments were found to be 11.83–55.32 μg/L, and 99.68–1,176.61 μg/kg, respectively. The APEOs' concentration level decreases as the sample is taken from a deeper layer of the sediment. A possible explanation for this is that in APEOs molecules, the hydrophilic fraction (CH2-CH2-O) increases the APEOs' absorption into sediment layers close to water, being saturated with water. In addition, the organic biofilm in the sediment layers used as schmutzdecke can reduce the concentration levels of APEOs that penetrates the deep layers of the sediment. The dominant homologues of APEOs in the river watercourse were those with 9–15 units of ethylene oxide (EO). Homologues with 1–12 units of ethylene oxide were found to be the dominant ones in the sediment layers of Hadera and Alexander rivers. |
| Databáze: | OpenAIRE |
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