Blar i SINTEF Open på forfatter "Brakstad, Odd Gunnar"
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Attachment of APAM to mineral particles in seawater
Brakstad, Odd Gunnar; Altin, Dag; Aas, Marianne; Skancke, Jørgen; Nordtug, Trond; Farkas, Julia (Peer reviewed; Journal article, 2021)Polymer injection is used in enhanced oil recovery (EOR) when an oil field ages and the pressure in the reservoir decreases, or for oil fields with heavy oil. By polymer injection, the viscosity of the water injected for ... -
Biodegradation in seawater of PAH and alkylphenols from produced water of a North Sea Platform
Lofthus, Synnøve; Almås, Inger Kjersti; Evans, Peter; Pelz, Oliver; Brakstad, Odd Gunnar (Journal article; Peer reviewed, 2018-09)Operational planned discharges of produced water (PW) to the marine environment from offshore oil production installations, contain low concentrations of dispersed oil compounds, like polycyclic aromatic hydrocarbons (PAH) ... -
Biodegradation of Dispersed Oil in natural Seawaters from Western Greenland and a Norwegian fjord
Brakstad, Odd Gunnar; Davies, Emlyn John; Ribicic, Deni; Winkler, Anika; Brönner, Ute; Netzer, Roman (Journal article; Peer reviewed, 2018-07-25)With increasing oil exploration, production and transportation in the Arctic, predictions of the fate of spilled oil become important, including oil compound biodegradation. The use of chemical dispersants may result in ... -
Biodegradation of Naturally Occurring Substances in Produced Water - Revision of data for the DREAM model
McFarlin, Kelly Marie; Brakstad, Odd Gunnar; Brönner, Ute (SINTEF Ocean reports;2018:00133, Research report, 2018-02-26)A literature review was conducted to obtain more reliable primary (biotransformation) and ultimate (biomineralization) biodegradation rates for compounds in produced water for the DREAM model, than the current biodegradation ... -
Biodegradation of oil spill dispersant surfactants in cold seawater
Brakstad, Odd Gunnar; Størseth, Trond Røvik; Brunsvik, Anders; Bonaunet, Kristin; Faksness, Liv Guri (Journal article; Peer reviewed, 2018)While biodegradation of chemically dispersed oil has been well documented, only a few studies have focused on the degradation of the dispersant compounds themselves. The objective of this study was to determine the ... -
Biodegradation of weathered crude oil in seawater with frazil ice
Lofthus, Synnøve; Bakke, Ingrid; Tremblay, Julien; Greer, Charles; Brakstad, Odd Gunnar (Journal article; Peer reviewed, 2020-05)As ice extent in the Arctic is declining, oil and gas activities will increase, with higher risk of oil spills to the marine environment. To determine biotransformation of dispersed weathered oil in newly formed ice, oil ... -
Biodegradation-mediated alterations in acute toxicity of water-accommodated fraction and single crude oil components in cold seawater
Brakstad, Odd Gunnar; Størseth, Trond Røvik; Rønsberg, Marianne Unaas; Hansen, Bjørn Henrik (Journal article; Peer reviewed, 2018-08)Hydrocarbon biodegradation may be slower in cold Arctic than in temperate seawater, and this will affect the toxicity time window of the hydrocarbons. In this study, the acute toxicities of water-soluble phases of ... -
Biotransformation in water and soil of nitrosamines and nitramines potentially generated from amine-based CO2 capture technology
Brakstad, Odd Gunnar; Sørensen, Lisbet; Zahlsen, Kolbjørn; Bonaunet, Kristin; Hyldbakk, Astrid; Booth, Andy (Journal article; Peer reviewed, 2018-03)Nitrosamines (NSAs) and nitramines (NAs) are identified as possible degradation products from amine-based post-combustion CO2-capture (PCCC). Selected NSAs and NAs were subjected to aerobic and anaerobic biodegradation ... -
Characterization of 2-Piperidineethanol and 1-(2-Hydroxyethyl)piperidine as strong bicarbonate forming solvents for CO2 Capture
Hartono, Ardi; Rennemo, Rune; Awais, Muhammad; Vevelstad, Solrun Johanne; Brakstad, Odd Gunnar; Kim, Inna; Knuutila, Hanna K (Journal article; Peer reviewed, 2017-08)The solubility of CO2 in the aqueous solutions of 50 mass% 2-Piperidineethanol (2-PPE) and 40 mass% 1-(2-Hydroxyethyl)pyrrolidine (1-(2HE)PRLD) was measured at temperatures from 40 to 120 °C at CO2 loading from 0.04 to 0.8 ... -
Comparison of microbial community dynamics induced by distinct crude oil dispersions reveals compositional differences
Ribicic, Deni; Netzer, Roman; Winkler, Anika; Brakstad, Odd Gunnar (Journal article; Peer reviewed, 2018-11)To understand the impact of oil contamination on marine microbial communities, numerous studies have been conducted following microbial dynamics after oil spills and concerning the effects of different environmental ... -
Dispersibility and biotransformation of oils with different properties in seawater
Brakstad, Odd Gunnar; Farooq, Umer; Ribicic, Deni; Netzer, Roman (Journal article; Peer reviewed, 2018-01)Dispersants are used to remove oils slicks from sea surfaces and to generate small oil-droplet dispersions, which may result in enhanced biodegradation of the oil. In this study, dispersibility and biodegradation of ... -
The fate of conventional and potentially degradable gillnets in a seawater-sediment system
Brakstad, Odd Gunnar; Sørensen, Lisbet; Hakvåg, Sigrid; Føre, Heidi Moe; Su, Biao; Aas, Marianne; Ribicic, Deni; Grimaldo, Eduardo (Peer reviewed; Journal article, 2022)Abandoned gillnets in the marine environment represent a global environmental risk due to the ghost fishing caused by the nets. Degradation of conventional nylon gillnets was compared to that of nets made of poly- butylene ... -
The influences of phytoplankton species, mineral particles and concentrations of dispersed oil on the formation and fate of marine oil-related aggregates
Henry, Ingrid Annemarie; Netzer, Roman; Davies, Emlyn John; Brakstad, Odd Gunnar (Journal article; Peer reviewed, 2020-01-15)The formation and fallout of oil-related marine snow have been associated with interactions between dispersed oil and small marine particles, like phytoplankton and mineral particles. In these studies, the influences of ... -
Korrosjon av stål i ferskvann
Bengtsson Blucher, Daniel; Knudsen, Ole Øystein; Brakstad, Odd Gunnar; Hakvåg, Sigrid; Johnsen, Roy (SINTEF Rapport;2024:00237, Research report, 2022)Det er i dag en diskusjon gående om korrosjon og korrosjonsmonn på pæler som skal stå i Mjøsa. Mjøsa er ferskvann, og det gjelder pæler på lengder opp mot 100 meter, og ca 50 meter av pælen vil stå i ferskvannet. Det er ... -
Methane seeps - A desktop study
Nordam, Tor; Dissanayake, Anusha L.; Brakstad, Odd Gunnar (SINTEF Ocean rapporter;OC2021 A-006, Research report, 2021-02-19)We have conducted a literature review and a simplified one-dimensional modelling study on the fate of methane bubbles and dissolved methane in the water column originating from methane seeps. From the literature review, ... -
Microbial communities in seawater from an Arctic and a temperate Norwegian fjord and their potentials for biodegradation of chemically dispersed oil at low seawater temperatures
Ribicic, Deni; Netzer, Roman; Winkler, Anika; Brakstad, Odd Gunnar (Journal article; Peer reviewed, 2018-04)Biodegradation of chemically dispersed oil at low temperature (0–2 °C) was compared in natural seawater from Arctic (Svalbard) and a temperate (Norway) fjords. The oil was premixed with a dispersant (Corexit 9500) and ... -
Microbial communities related to biodegradation of dispersed Macondo oil at low seawater temperature with Norwegian coastal seawater
Brakstad, Odd Gunnar; Throne-Holst, Mimmi; Netzer, Roman; Stoeckel, Donald M.; Atlas, Ronald M. (Peer reviewed; Journal article, 2015-07-16)The Deepwater Horizon (DWH) accident in 2010 created a deepwater plume of small oil droplets from a deepwater well in the Mississippi Canyon lease block 252 (‘Macondo oil’). A novel laboratory system was used in the current ... -
Microbial community and metagenome dynamics during biodegradation of dispersed oil reveals potential key-players in cold Norwegian seawater
Ribicic, Deni; Netzer, Roman; Hazen, Terry C.; Techtmann, Stephen M.; Drabløs, Finn; Brakstad, Odd Gunnar (Journal article; Peer reviewed, 2018-04)Oil biodegradation as a weathering process has been extensively investigated over the years, especially after the Deepwater Horizon blowout. In this study, we performed microcosm experiments at 5 °C with chemically dispersed ... -
Modelling biodegradation of crude oil components at low temperatures
Nordam, Tor; Lofthus, Synnøve; Brakstad, Odd Gunnar (Others, 2020-09)For oil spilled at sea, the main weathering processes are evaporation, emulsification, photo-oxidation, dispersion and biodegradation. Of these, only biodegradation may completely remove hydrocarbons from the environment ... -
Oil type and temperature dependent biodegradation dynamics. Combining chemical and microbial community data through multivariate analysis.
Ribicic, Deni; McFarlin, Kelly Marie; Netzer, Roman; Brakstad, Odd Gunnar; Winkler, Anika; Throne-Holst, Mimmi; Størseth, Trond Røvik (Journal article; Peer reviewed, 2018-08-07)Background This study investigates a comparative multivariate approach for studying the biodegradation of chemically dispersed oil. The rationale for this approach lies in the inherent complexity of the data and challenges ...