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Capping Efficiency of Various Carbonaceous and Mineral Materials for In Situ Remediation of Polychlorinated Dibenzo-p-dioxin and Dibenzofuran Contaminated Marine Sediments : Sediment-to-Water Fluxes and Bioaccumulation in Boxcosm Tests

Josefsson, Sarah (author)
Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Umeå universitet,Kemiska institutionen,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment
Schaanning, Morten (author)
Samuelsson, Göran S. (author)
Stockholms universitet,Systemekologiska institutionen
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Gunnarsson, Jonas S. (author)
Stockholms universitet,Systemekologiska institutionen
Olofsson, Ida (author)
Stockholms universitet,Systemekologiska institutionen
Eek, Espen (author)
Wiberg, Karin (author)
Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Umeå universitet,Kemiska institutionen,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment
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 (creator_code:org_t)
 
2012-03-05
2012
English.
In: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 46:6, s. 3343-3351
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The efficiency of thin-layer capping in reducing sediment-to-water fluxes and bioaccumulation of polychlorinated dibenzo-p-dioxins and dibenzofurans, hexachlorobenzene, and octachlorostyrene was investigated in a boxcosm experiment. The influence of cap thickness (0.5-5 cm) and different cap materials was tested using a three-factor experimental design. The cap materials consisted of a passive material (coarse or fine limestone or a marine clay) and an active material (activated carbon (AC) or kraft lignin) to sequester the contaminants. The cap thickness and the type of active material were significant factors, whereas no statistically significant effects of the type of passive material were observed. Sediment-to-water fluxes and bioaccumulation by the two test species, the surface-dwelling Nassarius nitidus and the deep-burrowing Nereis spp., decreased with increased cap thickness and with addition of active material. Activated carbon was more efficient than lignin, and a ∼90% reduction of fluxes and bioaccumulation was achieved with 3 cm caps with 3.3% AC. Small increases in fluxes with increased survival of Nereis spp. indicated that bioturbation by Nereis spp. affected the fluxes.

Subject headings

NATURVETENSKAP  -- Kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)
NATURVETENSKAP  -- Biologi -- Ekologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Ecology (hsv//eng)
NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)

Keyword

sediment-to-water fluxes
benthic bioaccumulation
thin-layer capping
cap thickness

Publication and Content Type

ref (subject category)
art (subject category)

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