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  • 1
    Online Resource
    Online Resource
    Amsterdam :Amsterdam University Press,
    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
    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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  • 2
    Keywords: Pollutants. ; Electronic books.
    Description / Table of Contents: Reviews of Environmental Contamination and Toxicology provides succinct, critical reviews of timely advances, philosophy and significant accomplishments in xenobiotics as well as those in need of study. The text also explores the toxicological implications involved.
    Type of Medium: Online Resource
    Pages: 1 online resource (231 pages)
    Edition: 1st ed.
    ISBN: 9781441968807
    Series Statement: Reviews of Environmental Contamination and Toxicology Series ; v.208
    DDC: 363.73
    Language: English
    Note: Intro -- Special Foreword -- Foreword -- Preface -- Contents -- Contributors -- Atmospheric Perfluorinated Acid Precursors: Chemistry, Occurrence, and Impacts -- 1 Introduction -- 2 Mechanisms of Atmospheric Formation of Perfluorinated Acids -- 2.1 Perfluorocarboxylic Acids -- 2.1.1 Mechanisms for Atmospheric Formation of Perfluoroacyl Halides -- 2.1.2 Mechanisms for Direct Atmospheric Formation of PFCAs -- 2.2 Perfluorosulfonic Acids (PFSAs) -- 3 Chemistry of Perfluorinated Acid (PFA) Precursors -- 3.1 Volatile Anesthetics -- 3.1.1 CF3 (CF2) x CHClBr -- 3.1.2 CF3 (CF2) x CHClOCHF 2 -- 3.2 Hydrochlorofluorocarbons (HCFCs) -- 3.2.1 CF3 (CF2) x CHFCl -- 3.2.2 CF3 (CF2) x CHCl 2 -- 3.3 Hydrofluorocarbons (HFCs, Non-telomer Based) -- 3.3.1 Saturated Hydrofluorocarbons (HFCs) -- 3.3.2 Hydrofluoroolefins (HFOs) -- 3.4 Fluorotelomer and Related Compounds -- 3.4.1 Perfluorinated Aldehyde (PFAL) Hydrates -- 3.4.2 Perfluorinated Aldehydes (PFALs) -- 3.4.3 Fluorotelomer Aldehydes (FTALs) -- 3.4.4 Odd Fluorotelomer Alcohols (oFTOHs) -- 3.4.5 Even Fluorotelomer Alcohols (FTOHs) -- 3.4.6 Fluorotelomer Olefins (FTOs) -- 3.4.7 Fluorotelomer Iodides (FTIs) -- 3.4.8 Fluorotelomer Acrylate (FTAc) -- 3.5 Perfluoroalkanesulfonamides -- 3.5.1 N -Alkyl-perfluoroalkanesulfonamides (NAFSA) -- 3.5.2 N -Alkyl-perfluoroalkanesulfamidoethanols (NAFSE) -- 4 Atmospheric Sources and Levels -- 4.1 Volatile Fluorinated Anesthetics -- 4.2 Hydrochlorofluorocarbons (HCFCs) -- 4.2.1 Potential Sources to the Atmosphere -- 4.2.2 Atmospheric Concentrations -- 4.3 Hydrofluorocarbons (HFCs, Non-telomer Based) -- 4.3.1 Saturated Hydrofluorocarbons (HFCs) -- 4.3.2 Hydrofluoroolefins (HFOs) -- 4.4 Fluorotelomer Compounds -- 4.4.1 Potential Sources to the Atmosphere -- 4.4.2 Atmospheric Concentrations -- 4.5 Perfluorosulfonamides -- 4.5.1 Potential Sources to the Atmosphere. , 4.5.2 Atmospheric Concentrations -- 5 Impact of Precursors on Environmental Perfluorinated Acid (PFA) Levels -- 5.1 Trifluoroacetic Acid (TFA) -- 5.2 Perfluorooctanesulfonic Acid (PFOS), Perfluorooctanoic Acid (PFOA) and Perfluorononanoic Acid (PFNA) -- 5.3 Long-Chained Perfluorocarboxylic Acids (PFCAs) -- 6 Summary -- References -- Isomer Profiling of Perfluorinated Substances as a Tool for Source Tracking: A Review of Early Findings and Future Applications -- 1 Introduction -- 2 Isomer Nomenclature -- 3 Historical and Current Manufacturing Sources of Perfluoroalkyl Isomers -- 4 Isomer-Specific Analytical Methodologies -- 4.1 Current Analytical Separation Methods -- 4.2 Analytical Quantification Bias -- 4.3 Strategies for Isomer Separation by LC--MS/MS -- 5 Influence of PhysicalChemical Properties on Environmental Fractionation of Perfluoroalkyl Isomers -- 6 Characterization of Perfluoroalkyl Isomer Profiles in the Environment -- 6.1 PFOA Isomer Profiles -- 6.2 Perfluoroalkyl Sulfonate and Sulfonamide Isomer Profiles -- 6.3 Perfluorocarboxylate Isomer Profiles Other than PFOA -- 7 Differences in Toxicity and Bioaccumulation of PFA Isomers -- 8 Summary -- References -- Biodegradation of Fluorinated Alkyl Substances -- 1 Introduction -- 2 The Persistence of Perfluorinated Surfactants -- 3 Understanding the Complex Biodegradation of Fluorotelomer-based Chemicals -- 4 Biodegradation of N-Alkyl Perfluorooctane Sulfonamide Derivatives -- 5 The Role of Fluorinated Polymers -- 6 On the Way to Mineralization Biodegradation of Organic Molecules that Have Low Fluorine Content -- 7 Summary -- References -- Perfluorinated Substances in Human Food and Other Sources of Human Exposure -- 1 Introduction -- 2 PFCs in Edible Fish and Seafood -- 3 Contamination of Food -- 3.1 Indirect Contamination of PFCs in Food Items. , 3.2 Direct Contamination of PFCs in Commercial Food Items -- 4 PFCs in Drinking Water -- 5 Safety Limits and Tolerable Daily Intakes -- 6 Perfluorinated Compounds in House Dust and Air -- 7 Correlation Between PFCs -- 8 Outlook -- 9 Summary -- References -- Index.
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  • 3
    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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