Browsing NGI articles by Author "Okkenhaug, Gudny"
Now showing items 1-9 of 9
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Challenges for the closure and natural rehabilitation of bauxite residue disposal sites
Torgersrud, Øyvind; Breedveld, Gijs D.; Okkenhaug, Gudny; Malme, B.; Cataldi, P. (Chapter, 2019)In the Bayer process, bauxite ore is digested with NaOH at high temperature and pressure, which results in the production of alumina and the recrystallisation of various residual minerals ending up in a bauxite residue. ... -
Combined column test for characterization of leaching and transport of trace elements in contaminated soils
Skjennum, Karen Ane Frøyland; French, Helen Kristine; Carotenuto, Pasquale; Okkenhaug, Gudny (Peer reviewed; Journal article, 2023) -
Industrial byproducts for the soil stabilization of trace elements and per- and polyfluorinated alkyl substances (PFASs)
Zhang, Yaxin; Cornelissen, Gerard; Silvani, Ludovica; Zivanovic, Valentina; Smebye, Andreas; Sørmo, Erlend; Thune, Gorm; Okkenhaug, Gudny (Peer reviewed; Journal article, 2022) -
Sustainable impermeable landfill barriers: The potential of using geological waste and surplus masses
Ritter, Stefan; Ånes, Eivind Wiik; Hovland, Kristin; Stridal, Ann-Cathrin; Hansen, Harald; Henriksen, Thomas Jolstad; Okkenhaug, Gudny (Lecture, 2023)This study investigated the potential to reuse excavated cement stabilised clay (CSC) and press filter residual (PFR) as impermeable landfill barriers. First, laboratory experiments including particle size distribution, ... -
The effects of soil organic matter on leaching of hexavalent chromium from concrete waste: Batch and column experiments
Eckbo, Cathrine; Okkenhaug, Gudny; Hale, Sarah (Peer reviewed; Journal article, 2022)Concrete is one of the most common building materials in the world and in accordance with the world’s shift to a circular economy, there is a need of an increase in concrete reuse and recycling. One of the environmental ... -
The mass flow and proposed management of bisphenol A in selected Norwegian waste streams
Arp, Hans Petter Heinrich; Morin, Nicolas; Hale, Sarah; Okkenhaug, Gudny; Breivik, Knut; Sparrevik, Magnus (Journal article; Peer reviewed, 2017)Current initiatives for waste-handling in a circular economy favor prevention and recycling over incineration or landfilling. However, the impact of such a transition on environmental emissions of contaminants like bisphenol ... -
The partitioning of Sb in contaminated soils after being immobilization by Fe-based amendments is more dynamic compared to Pb
Almås, Åsgeir R.; Pironin, Elsa; Okkenhaug, Gudny (Peer reviewed; Journal article, 2019)Soils and sediments from shooting ranges can be heavily contaminated with metals and metalloids that can leach significant concentrations into the environment. To prevent trace element leaching, contaminated soils must be ... -
The reuse of excavated soils from construction and demolition projects: Limitations and possibilities
Hale, Sarah; Roque, Antonio José; Okkenhaug, Gudny; Sørmo, Erlend; Lenoir, Thomas; Carlsson, Christel; Kupryianchyk, Darya; Flyhammar, Peter; Žlender, Bojan (Peer reviewed; Journal article, 2021) -
Use of numerical modelling when designing a full-scale field test of landfill top covers
Ånes, Eivind Wiik; Ritter, Stefan; Okkenhaug, Gudny (Lecture, 2023)Landfill closures typically include cover systems with a low-permeable barrier to limit the flow of water to and from the waste to minimize contamination of the surrounding environment. Commonly the lowpermeable barrier ...