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Integrated cost and environmental impact assessment of management options for dredged sediment

Svensson, Nina, 1988- (författare)
Statens väg- och transportforskningsinstitut,Miljö, MILJÖ,Statens Väg- och Transportforskningsinstitut (VTI),The Swedish National Road and Transport Research Institute (VTI)
Norén, Anna, 1989 (författare)
Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Sweden
Modin, Oskar, 1980 (författare)
Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Sweden
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Karlfeldt Fedje, Karin, 1977 (författare)
Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Sweden; Renova AB, Sweden
Rauch, Sebastien, 1971 (författare)
Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Sweden
Hvitt Strömvall, Ann-Margret, 1963 (författare)
Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Sweden
Andersson-Sköld, Yvonne, 1957 (författare)
Statens väg- och transportforskningsinstitut,Miljö, MILJÖ,Chalmers University of Technology, Sweden,Statens Väg- och Transportforskningsinstitut (VTI),The Swedish National Road and Transport Research Institute (VTI),Chalmers tekniska högskola
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 (creator_code:org_t)
Elsevier BV, 2022
2022
Engelska.
Ingår i: Waste Management. - : Elsevier BV. - 0956-053X .- 1879-2456. ; 138, s. 30-40
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • Large quantities of sediment must be dredged regularly to enable marine transport and trade. The sediments are often polluted, with e.g. metals, which limits the management options. The aim of this study has been to assess costs and environmental impacts (impact on climate, marine organisms, etc.) of different management options for polluted dredged sediment, by combining life-cycle assessment (LCA) of the climate impact, scoring of other environmental aspects and a cost evaluation. This approach has been used to study both traditional and new management alternatives for a real port case. The studied options include landfilling, deep-sea disposal, construction of a port area using a stabilization and solidification (S/S) method, and a combination of the aforementioned methods with the innovative option of metal recovery through sediment electrolysis. The LCA showed that deep-sea disposal had the lowest climate impact. The assessment of the other environmental impacts showed that the result varied depending on the pollution level and the time perspective used (short or long-term). Using sediment for construction had the highest climate impact, although other environmental impacts were comparably low. Electrolysis was found to be suitable for highly polluted sediments, as it left the sediment cleaner and enabled recovery of precious metals, however the costs were high. The results highlight the complexity of comparing different environmental impacts and the benefits of using integrated assessments to provide clarity, and to evaluate both the synergetic and counteracting effects associated with the investigated scenarios and may aid early-stage decision making.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Naturresursteknik -- Annan naturresursteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Environmental Engineering -- Other Environmental Engineering (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Naturresursteknik -- Miljöledning (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Environmental Engineering -- Environmental Management (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Samhällsbyggnadsteknik -- Miljöanalys och bygginformationsteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Civil Engineering -- Environmental Analysis and Construction Information Technology (hsv//eng)
NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)

Nyckelord

Stabilization and solidification
Environmental assessment
Polluted sediment
Dredged sediment
Life-cycle assessment
Metal electrolysis

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