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  • Cornelissen, GerardStockholms universitet,Institutionen för tillämpad miljövetenskap (ITM) (author)

Remediation of Contaminated Marine Sediment Using Thin-Layer Capping with Activated Carbon-A Field Experiment in Trondheim Harbor, Norway

  • Article/chapterEnglish2011

Publisher, publication year, extent ...

  • 2011-06-27
  • American Chemical Society (ACS),2011
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-66598
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-66598URI
  • https://doi.org/10.1021/es2011397DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • authorCount :11
  • 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.

Added entries (persons, corporate bodies, meetings, titles ...)

  • Krusa, Marie Elmquist (author)
  • Breedveld, Gijs D. (author)
  • Eek, Espen (author)
  • Oen, Amy M. P. (author)
  • Arp, Hans Peter H. (author)
  • Raymond, CarolineStockholms universitet,Systemekologiska institutionen (author)
  • Samuelsson, GöranStockholms universitet,Systemekologiska institutionen(Swepub:su)gosa6312 (author)
  • Hedman, Jenny E.Stockholms universitet,Systemekologiska institutionen (author)
  • Stokland, Oystein (author)
  • Gunnarsson, Jonas S.Stockholms universitet,Systemekologiska institutionen(Swepub:su)jgunn (author)
  • Stockholms universitetInstitutionen för tillämpad miljövetenskap (ITM) (creator_code:org_t)

Related titles

  • In:Environmental Science and Technology: American Chemical Society (ACS)45:14, s. 6110-61160013-936X1520-5851

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