Sökning: "PFSAs"

Visar resultat 1 - 5 av 20 uppsatser innehållade ordet PFSAs.

  1. 1. PFAS i lakvatten från deponi : Sammanställning av mätdata från Gärstad avfallsanläggning Tekniska verken

    Kandidat-uppsats, Linköpings universitet/Institutionen för tema

    Författare :Sara Rylow; [2023]
    Nyckelord :PFAS; PFSAs; PFCAs; leachate; landfill; PFAS; PFSA; PFCA; Lakvatten; Deponi;

    Sammanfattning : Tidigare studier har visat på höga halter av per- och polyfluorerade alkylsubstanser (PFAS) ilakvatten från avfallsanläggningar. Avfallsanläggningar i Sverige har idag inga krav på attrena bort PFAS från lakvatten, och anläggningarna har generellt inte ett reningssystem som äranpassat för att rena den typen av ämnen. LÄS MER

  3. 2. Method development and screening of extractable organofluorine (EOF) and targeted PFAS analysis in food packaging materials

    Kandidat-uppsats, Örebro universitet/Institutionen för naturvetenskap och teknik

    Författare :Nora Larsson; [2022]
    Nyckelord :Per- and polyfluoroalkyl substances PFAS ; Food packaging materials; Extractable organofluorine; Method development; Combustion ion chromatography; Targeted analysis;

    Sammanfattning : Per- and polyfluoroalkyl substances (PFAS) have been manufactured and used in differentapplications for several decades, including food packaging materials. During the last 20 yearsthese compounds have been acknowledged as hazardous for humans and the environment, anddifferent regulations on PFAS have been established on both national and international levels. LÄS MER

  4. 3. Modelling Competitive Sorption of Per- and Polyfluoroalkyl Substances (PFASs) to Soil and Sorbents

    Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Linnea Georgii; [2021]
    Nyckelord :PFAS; modelling; competitive sorption; adsorption; isotherms; PFAS; modellering; konkurrenseffekter; adsorption; isotermer;

    Sammanfattning : Per- and polyfluoroalkyl substances (PFASs) have become contaminants of increasing concern to society due to the contamination of drinking water and the ecosystem. A better understanding of the sorption and transport of PFASs in soil systems is urgently needed, however there have been few studies dedicated to investigating competitive sorption among PFASs, and there is no available model to model such effects. LÄS MER

  5. 4. Quantification of target per- and polyfluoroalkyl substances (PFASs) and extractable organic fluorine (EOF) in crayfish from Lake Vättern, Sweden.

    Kandidat-uppsats, Örebro universitet/Institutionen för naturvetenskap och teknik

    Författare :Wilma Villbrand; [2020]
    Nyckelord :;

    Sammanfattning : Per- and polyfluorinated substances (PFASs) are a family of persistent organic pollutants in which the aliphatic carbon chains have been fluorinated, either completely or partially. One subclass of PFASs are perfluoroalkyl acids (PFAAs), in which perfluoroalkyl carboxylic acids (PFCAs) and perfluoroalkyl sulfonic acids (PFSAs) are two prominent groups. LÄS MER

  7. 5. Total oxidizable precursor assay: Applications and limitations. A study on the occurrence of perfluoroalkyl and polyfluoroalkyl substances (PFASs) in Chinese Wastewater Treatment Plants

    Master-uppsats, Örebro universitet/Institutionen för naturvetenskap och teknik

    Författare :Pontus Larsson; [2020]
    Nyckelord :;

    Sammanfattning : Total oxidizable precursor (TOP) assay is an in-lab method which oxidatively converts precursor compounds of poly- and perfluoroalkyl substances (PFASs) into measurable perfluorinated alkyl acids (PFAAs). The method is a very strong tool to semi-quantify PFASs that would otherwise be missed in conventional targeted analysis using liquid chromatography - tandem mass spectrometry (LC-MS/MS). LÄS MER