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Method for generating parameterized ecotoxicity data of dispersed oil for use in environmental modelling |
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| Authors: | Nordtug Trond Olsen Anders Johny Altin Dag Meier Sonnich Overrein Ingrid Hansen Bjørn Henrik Johansen Øistein |
| Institution: | a SINTEF, Materials and Chemistry, Marine Environmental Technology, 7465 Trondheim, Norway b Norwegian University of Science and Technology, Department of Biology, N-7491 Trondheim, Norway c BioTrix, N-7022 Trondheim, Norway d Institute of Marine Research, P.O. Box 1870, N-5817 Nordnes, Bergen, Norway e SINTEF Fisheries and Aquaculture, N-7465 Trondheim, Norway |
| Abstract: | The aim of the work was to establish methodology for realistic laboratory-based test exposures of organisms to oil dispersions, specifically designed to generate parameterized toxicity data. Such data are needed to improve the value of numerical models used to predict fate and effects of oil spills and different oil spill responses. A method for continuous and predictable in-line production of oil dispersions with defined size distribution of different oil qualities was successfully established. The system enables simultaneous comparison between the effects of different concentrations of dispersion and their corresponding equilibrium water soluble fractions. Thus, net effects of the oil droplet fraction may be estimated. The method provides data for comparing the toxicity of oil dispersions generated both mechanically and with the use of chemical dispersions, incorporating the toxicity of both dissolved oil and droplets of oil. |
| Keywords: | Method development Dispersed oil Dispersant Environmental modelling Ecotoxicity |
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