Search for dissertations about: "Miljökemi"

Showing result 1 - 5 of 135 swedish dissertations containing the word Miljökemi.

  1. 1. Synthesis of highly brominated diphenyl ethers and aspects on photolysis and indoor spreading

    University dissertation from Stockholm : Institutionen för miljökemi

    Author : Anna Christiansson; Åke Bergman; Eva Jakobsson; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; Environmental Chemistry; miljökemi;

    Abstract : Adding chemicals to materials to decrease flammability can be dated back to as early as 450 BC when the Egyptians used alum to reduce flammability of wood. Almost 2500 years later brominated flame retardants (BFRs) are used to prevent ignition of textiles, electronics and polymers. READ MORE

  2. 2. Temporal and spatial trends of organohalogens in guillemot (Uria aalge) from North Western Europe

    University dissertation from Stockholm : Institutionen för miljökemi

    Author : Hrönn Jörundsdóttir; Åke Bergman; Derek Muir; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Arctic; environmental; monitoring; pollution; time trends; spatial trends; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; Environmental Chemistry; miljökemi;

    Abstract : The Arctic and sub-Arctic region of the North Atlantic is a remote area, also in relations to environmental contaminants, such as POPs, BFRs and last but not least, PFCs. Both the BFRs and PFCs are considered emerging pollutants of significant environmental concern. READ MORE

  3. 3. Brominated natural products at different trophic levels in the Baltic Sea Identification of polybrominated dioxins, hydroxylated and methoxylated diphenyl ethers

    University dissertation from Stockholm : Institutionen för miljökemi

    Author : Anna Malmvärn; Lillemor Asplund; Åke Bergman; Bert van Bavel; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; polybrominated dibenzo-p-dioxins; hydroxylated polybrominated diphenyl ethers; methoxylated polybrominated diphenyl ethers; Baltic Sea; algae; natural production; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; Environmental Chemistry; miljökemi;

    Abstract : Over time, the Baltic Sea has been contaminated by increasing discharges of pollutants from human activities. Persistent organic pollutants (POPs) have caused toxic effects in wildlife and excess of nutrients have led to eutrophication. READ MORE

  4. 4. Synthesis and characterization of highly polybrominated diphenyl ethers

    University dissertation from Stockholm : Institutionen för miljökemi

    Author : Daniel Teclechiel; Göran Marsh; Vladimir Nikiforov; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; Environmental Chemistry; miljökemi;

    Abstract : Polybrominated diphenyl ethers (PBDEs) make up an important class of brominated flame retardants. The present production is mainly concentrated to DecaBDE but until recently also a significant production of PentaBDE and OctaBDE took place, leaving us with a large number of different PBDE congeners. READ MORE

  5. 5. Organic Phosphorus Compounds in Aquatic Sediments Analysis, Abundance and Effects

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Joakim Ahlgren; Emil Rydin; Monica Waldebäck; Lars Tranvik; Karin Markides; Sven Blomqvist; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Organic phosphorus; aquatic sediment; eutrophication; NMR; internal loading; sample preparation; extraction; degradation; Miljökemi; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi;

    Abstract : Phosphorus (P) is often the limiting nutrient in lacustrine and brackish eco-systems, and enhanced input of P into an aquatic system might therefore negatively impact the environment. Because modern waste water manage-ment have reduced external P input to surface waters, internal P loading from the sediment has become one of the main P sources to aquatic ecosys-tems, in which relatively unknown organic P compounds seem to be more active in P recycling than previously thought. READ MORE