Blar i Norwegian Geotechnical Institute (NGI) Digital Archive på forfatter "Knutsen, Heidi"
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Excavated vs novel in situ soil washing as a remediation strategy for sandy soils impacted with per- and polyfluoroalkyl substances from aqueous film forming foams
Høisæter, Åse; Arp, Hans Peter; Slinde, Gøril; Knutsen, Heidi; Hale, Sarah; Breedveld, Gijs D.; Hansen, Mona Cecilie (Peer reviewed; Journal article, 2021) -
Facilitating microplastic quantification through the introduction of a cellulose dissolution step prior to oxidation: Proof-of-concept and demonstration using diverse samples from the Inner Oslofjord, Norway
Olsen, Linn Merethe Brekke; Knutsen, Heidi; Mahat, Sabnam; Wade, Emma Jane; Arp, Hans Peter (Peer reviewed; Journal article, 2020)Identifying and quantifying microplastic in marine samples can be facilitated by removing natural organic matter (NOM). Cellulosic material, like chitin, however, are a type of NOM that is resistant to chemical digestion, ... -
Leachate emissions of short- and long-chain perand polyfluoralkyl substances (PFASs) from various Norwegian landfills
Knutsen, Heidi; Mæhlum, Trond; Haarstad, Ketil; Slinde, Gøril Aasen; Arp, Hans Peter (Peer reviewed; Journal article, 2019)Restrictions on the use of long-chain per- and polyfluoralkyl substances (PFASs) has led to substitutions with short-chain PFASs. This study investigated the presence of four short-chain PFASs and twenty-four long-chain ... -
Microplastic accumulation by tube-dwelling, suspension feeding polychaetes from the sediment surface: A case study from the Norwegian Continental Shelf
Knutsen, Heidi; Cyvin, Jakob Bonnevie; Totland, Christian; Wade, Emma Jane; Castro, Veronica; Pettersen, Arne; Laugesen, Jens; Møskeland, Thomas; Arp, Hans Peter; Lilleeng, Øyvind (Peer reviewed; Journal article, 2020)Sediment samples (0–1 cm) and tube-dwelling polychaetes from the Norwegian Continental Shelf and the Barents Sea were collected, including areas close to oil and gas installations and remote locations. Microplastics (≥45 μm) ... -
Preventing brominated flame retardants from occurring in recycled expanded polystyrene: comparing Norwegian visual sorting with advanced screening methods
Knutsen, Heidi; Arp, Hans Peter (Peer reviewed; Journal article, 2021) -
Recycling of paper, cardboard and its PFAS in Norway
Langberg, Håkon Austad; Arp, Hans Peter Heinrich; Varela, Gabriela Castro; Asimakopoulos, Alexandros; Knutsen, Heidi (Peer reviewed; Journal article, 2023)Per- and polyfluoroalkyl substances (PFAS) have been used in paper products since the 1960s. PFAS emissions during the life cycle of these products have been substantial sources of these substances to the environment. Here, ...