Essays about: "PFOS"

Showing result 21 - 25 of 68 essays containing the word PFOS.

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

    University essay from Uppsala universitet/Luft-, vatten- och landskapslära

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

    Abstract : 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. READ MORE

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

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Wilma Villbrand; [2020]
    Keywords : ;

    Abstract : 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. READ MORE

  4. 23. Chemical degradation of PFAS using hydrogen peroxide and persulfate

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Jonathan Bannister; [2020]
    Keywords : PFOS; PFOA; PFBA; Hydrogen Peroxide; Persulfate; Degradation;

    Abstract : PFAS are a group of relatively newly discovered man-made pollutants. PFAS contains a C-F bond which is one of the strongest bonds in organic chemistry. Therefore, PFAS are not easily degradable and, once release into nature, are very persistent. READ MORE

  5. 24. Bindning av PFAS-ämnen till humus- och fulvosyror : en dialysstudie

    University essay from SLU/Dept. of Soil and Environment

    Author : Johannes Kikuchi; [2020]
    Keywords : PFOS; PFOA; sorption; kinetics; dissolved organic matter; natural organic matter; DOC; DOM; membrane;

    Abstract : To make more accurate predictions of the mobility of perfluoroalkyl substances (PFAS) in soil and water, better understanding of PFAS sorption to components of the terrestrial and aquatic systems is needed. This study investigated the possible sorption of a range of PFAS compounds with varying chemistries to humic acid (HA) and fulvic acid (FA) using a dialysis bag experimental set-up. READ MORE

  6. 25. Groundwater Movement and PFAS Transportation in the Vreta-Bålsta Esker

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Kevin Pettersson; [2020]
    Keywords : GMS; MODFLOW; MT3DMS; PFAS; modelling; GMS; MODFLOW; MT3DMS; PFAS; Modellering;

    Abstract : Håbo municipality is looking for alternative drinking water sources for its residence city of Bålsta. One possible source is the Vreta-Bålsta esker located northeast of Bålsta, which could be used for artificial infiltration and extraction of groundwater. READ MORE