Search for dissertations about: "Sediment sampling"

Showing result 1 - 5 of 33 swedish dissertations containing the words Sediment sampling.

  1. 1. Fate and transport of POPs in the aquatic environment with focus on contaminated sediments

    University dissertation from Umeå : Kemiska institutionen

    Author : Sarah Josefsson; Umeå universitet.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; bioturbation; bioirrigation; bioaccumulation; secondary sources; buried contaminants; sediment remediation; active capping; thin-layer capping; Marenzelleria spp.; Baltic Sea; polychlorinated dibenzo-p-dioxins; polychlorinated dibenzofurans; polychlorinated biphenyls; hexachlorobenzene; octachloro¬styrene; polybrominated diphenyl ethers; PCDD Fs; PCBs; HCB; OCS; PBDEs; water sampling; passive sampling; particulate fraction; freely dissolved; apparently dissolved; colloid; organic carbon; activated carbon; lignin; sediment-to-water flux; spring bloom; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; NATURAL SCIENCES Chemistry Environmental chemistry Persistent organic compounds; NATURVETENSKAP Kemi Miljökemi Persistenta organiska föreningar; Environmental Science; miljövetenskap;

    Abstract : Persistent organic pollutants (POPs) are hydrophobic substances that readily sorb to organic matter in particles and colloids instead of being freely dissolved in the water phase. This sorption affects the bio­availability and environmental transport of the POPs. READ MORE

  2. 2. Contaminated sediments: Methods to assess release and toxicity of organic chemical mixtures

    University dissertation from Stockholm : Department of Environmental Science and Analytical Chemistry, Stockholm University

    Author : Lukas Mustajärvi; Stockholms universitet.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Sediment; Hydrophobic organic contaminants; Flux; Bioturbation; Passive sampling; Passive dosing; Mixture toxicity; Applied Environmental Science; tillämpad miljövetenskap;

    Abstract : Bottom sediments around the world store large amounts of legacy hy-drophobic organic contaminants (HOCs), forming mixtures of un-known chemical composition. Primary emissions to the environment of many HOCs have been reduced as a consequence of regulation. READ MORE

  3. 3. Benthic fluxes of biogenic elements in the Baltic Sea Influence of oxygen and macrofauna

    University dissertation from Stockholm : Department of Ecology, Environment and Plant Sciences, Stockholm University

    Author : Nils Ekeroth; Stockholms universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Sediment biogeochemistry; Bioturbation; Benthic nutrient fluxes; Bottom water oxygenation; Box corer; Sediment sampling; marin ekologi; Marine Ecology;

    Abstract : This thesis investigates how benthic fluxes of phosphorus (P), nitrogen (N), and silicon (Si) change upon oxygenation of anoxic soft bottoms in the brackish, eutrophicated Baltic Sea. Direct measurements in situ by benthic landers demonstrated that fluxes of dissolved inorganic P (DIP) from anoxic bottom sediments in the Eastern Gotland Basin are higher than previously thought (Paper I). READ MORE

  4. 4. Benthic metabolism and sediment nitrogen cycling in Baltic sea coastal areas the role of eutrophication, hypoxia and bioturbation

    University dissertation from Department of Geological Sciences, Stockholm Univeristy

    Author : Stefano Bonaglia; Stockholms universitet.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Eutrophication; Sediment; Benthic Flux; Nitrogen Cycle; Denitrification; Baltic Sea; Biogeochemistry; biogeokemi; marin- och brackvattensekologi; Marine and Brackish Water Ecology; marin ekologi; Marine Ecology; geokemi; Geochemistry;

    Abstract : Eutrophication is one of the greatest threats for the Baltic Sea, and one of its more critical consequences is bottom water hypoxia. Nutrient enrichment and oxygen-depletion affect both the deep central basins and a number of coastal areas, even though strategies for nutrient reduction have lately been implemented. READ MORE

  5. 5. Alpine lake sediment archives and catchment geomorphology causal relationships and implications for paleoenvironmental reconstructions

    University dissertation from Stockholm : Institutionen för naturgeografi och kvartärgeologi

    Author : Lena Rubensdotter; Stockholms universitet.; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; alpine lakes; geomorphology; lacustrine sedimentation; slope processes; glaciofluvial; Holocene; Swedish Lapland; NATURAL SCIENCES Earth sciences Exogenous earth sciences Physical geography; NATURVETENSKAP Geovetenskap Exogen geovetenskap Naturgeografi;

    Abstract : Lake sediments are frequently used as archives of climate and environmental change. Minerogenic sediment variability in alpine lakes is often used to reconstruct past glacier and slope process activity. Alpine lake sediments can however have many different origins, which may induce errors in paleoenvironmental reconstructions. READ MORE