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Assessing the Risk ...
Assessing the Risk of Contaminant Dispersion From Fibrous Sediments of Industrial Origin
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- Goransson, Gunnel (författare)
- Swedish Geotech Inst, Linköping, Sweden.
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- Apler, Anna (författare)
- Geol Survey Sweden, Uppsala, Sweden.
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- Dahlberg, Anna-Karin (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment,Swedish Univ Agr Sci, Dept Aquat Sci & Assessment, Uppsala, Sweden.
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- Lofroth, Hjordis (författare)
- Swedish Geotech Inst, Linköping, Sweden.
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- Josefsson, Sarah (författare)
- Geol Survey Sweden, Uppsala, Sweden.
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- Wiberg, Karin (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment,Swedish Univ Agr Sci, Dept Aquat Sci & Assessment, Uppsala, Sweden.
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- Frogner-Kockum, Paul (författare)
- Swedish Geotech Inst, Linköping, Sweden.
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- Nylander, Per (författare)
- Swedish Geotech Inst, Linköping, Sweden.
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- Hedfors, Jim (författare)
- Swedish Geotech Inst, Linköping, Sweden.
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- Snowball, Ian, 1963- (författare)
- Uppsala universitet,Naturresurser och hållbar utveckling
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Swedish Geotech Inst, Linköping, Sweden Geol Survey Sweden, Uppsala, Sweden. (creator_code:org_t)
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- 2021-09-08
- 2021
- Engelska.
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Ingår i: Frontiers in Marine Science. - : Frontiers Media S.A.. - 2296-7745. ; 8
- Relaterad länk:
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https://doi.org/10.3...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- Unregulated discharges of wastewater from pulp and paper factories resulted in the formation of relatively thick organic (cellulose) rich sediments in shallow waters along the Swedish coast. These deposits are known as fiberbanks and are contaminated by persistent organic pollutants (POPs), metals and methylmercury, which can be dispersed by diffusion and advective processes coupled to propeller wash, high river discharges, strong wind waves and submarine landslides. Based on a case study of polychlorinated biphenyls (PCBs), one group of prevalent POPs in the fiberbanks, we present a probabilistic approach to estimate the potential risk of dispersion of fiberbank contaminants. The approach allows for estimation of the dispersal pathways that dominates the risk within a given time and provides more insight about the significance of various dispersion processes. We show that it is highly likely that chemical diffusion and advection triggered by ship-induced resuspension will disperse PCBs (sum of seven congeners; sigma 7PCB) above a threshold level for environmental impact, while the likelihood of river and wind-wave generated resuspension dispersion pathways are lower (similar to 20%, respectively). We further show that there is approximately 5% likelihood that a submarine landslide will disperse sigma 7PCB above the threshold level. The study implies that the governing parameters for risk assessment specifically should include reliable data on contaminant concentration, water depth above the fiberbank, estimation of concerned fiberbank areas, time duration of erosive fluid flows and measured diffusion. The approach provides insight into the importance of various dispersion processes. We suggest that it can be applied to support risk assessment, especially when there are limited available data and/or knowledge about the system under study.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Nyckelord
- contaminated sediments
- extreme events
- PCBs
- risk assessment
- submarine landslide
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Goransson, Gunne ...
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Apler, Anna
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Dahlberg, Anna-K ...
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Lofroth, Hjordis
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Josefsson, Sarah
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Wiberg, Karin
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Frogner-Kockum, ...
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Nylander, Per
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Hedfors, Jim
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Snowball, Ian, 1 ...
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