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Remediation of Cont...
Remediation of Contaminated Marine Sediment Using Thin-Layer Capping with Activated Carbon-A Field Experiment in Trondheim Harbor, Norway
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- Cornelissen, Gerard (författare)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
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Krusa, Marie Elmquist (författare)
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Breedveld, Gijs D. (författare)
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Eek, Espen (författare)
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Oen, Amy M. P. (författare)
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Arp, Hans Peter H. (författare)
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- Raymond, Caroline (författare)
- Stockholms universitet,Systemekologiska institutionen
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- Samuelsson, Göran (författare)
- Stockholms universitet,Systemekologiska institutionen
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- Hedman, Jenny E. (författare)
- Stockholms universitet,Systemekologiska institutionen
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Stokland, Oystein (författare)
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- Gunnarsson, Jonas S. (författare)
- Stockholms universitet,Systemekologiska institutionen
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(creator_code:org_t)
- 2011-06-27
- 2011
- Engelska.
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Ingår i: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 45:14, s. 6110-6116
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- In situ amendment of contaminated sediments using activated carbon (AC) is a recent remediation technique, where the strong sorption of contaminants to added AC reduces their release from sediments and uptake into organisms. The current study describes a marine underwater field pilot study in Trondheim harbor, Norway, in which powdered AC alone or in combination with sand or clay was tested as a thin-layer capping material for polycyclic aromatic hydrocarbon (PAH)-contaminated sediment. Several novel elements were included, such as measuring PAH fluxes, no active mixing of AC into the sediment, and the testing of new manners of placing a thin AC cap on sediment, such as AC+clay and AC+sand combinations. Innovative chemical and biological monitoring methods were deployed to test capping effectiveness. In situ sediment-to-water PAH fluxes were measured using recently developed benthic flux chambers. Compared to the reference field, AC capping reduced fluxes by a factor of 2-10. Pore water PAH concentration profiles were measured in situ using anew passive sampler technique, and yielded a reduction factor of 2-3 compared to the reference field. The benthic macrofauna composition and biodiversity were affected by the AC amendments, AC + clay having a lower impact on the benthic taxa than AC-only or AC + sand. In addition, AC + clay gave the highest AC recoveries (60% vs 30% for AC-only and AC + sand) and strongest reductions in sediment-to-water PAH fluxes and porewater concentrations. Thus, application of an AC-clay mixture is recommended as the optimal choice of the currently tested thin-layer capping methods for PAHs, and more research on optimizing its implementation is needed.
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Cornelissen, Ger ...
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Krusa, Marie Elm ...
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Breedveld, Gijs ...
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Eek, Espen
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Oen, Amy M. P.
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Arp, Hans Peter ...
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Raymond, Carolin ...
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Samuelsson, Göra ...
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Hedman, Jenny E.
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Stokland, Oystei ...
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Gunnarsson, Jona ...
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Environmental Sc ...
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Stockholms universitet