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  • 1
    Online Resource
    Online Resource
    Schoonheid in water. (2009)
    Amsterdam :Amsterdam University Press,
    Details
    Keywords: Emerging contaminants in water. ; Water -- Pollution -- Environmental aspects. ; Estrogen -- Environmental aspects. ; Electronic books.
    Description / Table of Contents: In onze leefomgeving zijn in toenemende mate stoffen te vinden die traditioneel niet als verontreiniging worden beschouwd of eenvoudigweg niet bekend zijn. Zo zijn in het oppervlaktewater en grondwater restanten te vinden van geneesmiddelen, schoonmaakmiddelen, middelen voor persoonlijke hygiëne en stimulerende middelen. Omdat zulke nieuw opkomende stoffen niet gereguleerd zijn, worden ze niet in de gaten gehouden in reguliere monitoringsprogramma's. In deze rede wordt ingegaan op de aanpak die de universiteit, samen met de waterbedrijven, hanteert voor de opsporing van stoffen die nieuwe bedreigingen voor de waterkwaliteit vormen, hun identifi catie en de betekenis van hun aanwezigheid voor de gezondheid van mens en ecosysteem. Eenmaal geïdentifi ceerd kunnen het gedrag van de stoffen in oppervlaktewater en grondwater, en hun effecten bestudeerd en voorspeld worden en nieuwe technieken voor verwijdering ervan worden ontworpen.
    Type of Medium: Online Resource
    Pages: 1 online resource (33 pages)
    Edition: 1st ed.
    ISBN: 9789048510955
    Series Statement: VOR Natuurwetenschappen, Wiskunde en Informatica, 329
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=474278
    DDC: 363.738;930.1
    Language: Dutch
    Note: Pages:1 to 10 -- Pages:11 to 20 -- Pages:21 to 30 -- Pages:31 to 33.
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    GEOMAR EBL
  • 2
    facet.materialart.
    Unknown
    The applicability of accelerated solvent extraction (ASE) to extract lipid biomarkers from soils (2006)
    Elsevier
    Details
    Publication Date: 2023-02-17
    Description: We investigated the ability of accelerated solvent extraction (ASE) to extract selected lipid biomarkers (C19–C34 n-alkanes, n-alcohols and n-fatty acids as well as dehydroabietic acid and β-sitosterol) from a sandy soil profile under Corsican pine. Two organic layers (moss and F1) as well as two mineral soil horizons (EA and C1) were sampled and extracted with DCM/MeOH (93:7 v/v) by ASE at 75 °C and a pressure of 6.9 × 106 Pa or 17 × 106 Pa. Soxhlet extractions were used as the established reference method. After clean-up and derivatization with BSTFA, the extracts were analyzed on GC/MS. Using Soxhlet as a reference, we found ASE to extract all compounds adequately. The n-alkanes, especially, were found to be extracted very efficiently from all horizons studied. Only the n-fatty acids and β-sitosterol from the organic layers seemed to be extracted at a slightly lower efficiency by ASE. In all but two instances the relative abundance of extracted lipids within a component class was the same regardless of the extraction method used. Using a higher pressure in the ASE extractions significantly increased the extraction efficiency for all component classes in the moss layer, except β-sitosterol. The effect was most pronounced for the n-alkanes. In the EA horizon, a higher pressure slightly reduced the extraction efficiency for dehydroabietic acid. The observed differences between ASE and Soxhlet extractions as well as the pressure effect can be explained by a decrease in polarity of the extractant due to the elevated pressure and temperature applied during ASE extractions as compared to Soxhlet extractions. This would mainly increase the extraction efficiency of the least polar biomarkers: the n-alkanes as was observed. In addition, a better penetration of still partially water-filled micro pores under elevated pressure and temperature may have played a role.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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