Sökning: "PCDD"

Visar resultat 6 - 10 av 36 avhandlingar innehållade ordet PCDD.

1. 6. Rapid sample preparation and bioanalytical techniques for efficient screening of organic pollutants in the environment

   Författare :Malin Nording; Peter Haglund; Ron Hoogenboom; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; accelerated solvent extraction; CAFLUX; food; immunoassay; PAH; PCDD; PCDF; pressurized liquid extraction; soil; CALUX; cell-based bioassay; chemically activated fluorescent gene expression; chemically activated luciferase gene expression; dioxin; ELISA; enzyme-linked immunosorbent assay; feed; Environmental chemistry; Miljökemi;

   Sammanfattning : Large numbers of samples often need to be prepared and analysed in surveys of organic pollutants in the environment, but while the methods commonly used in such surveys can provide abundant detail they are generally costly, time-consuming and require large amounts of resources, so there is a need for simpler techniques. The work underlying this thesis assessed the potential utility of more convenient sample preparation and bioanalytical techniques for rapidly screening various environmental matrices that could be useful complements to higher resolution methods. LÄS MER

3. 7. Mixed fuels composed of household waste and waste wood : Characterization, combustion behaviour and potential emissions

   Författare :Mar Edo Giménez; Stina Jansson; Jonas Dahl; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MSW; RDF; persistent organic pollutants; PCDD; PCDF; solid waste pre-treatment; torrefaction; food waste; contaminated wood;

   Sammanfattning :    Incineration with energy recovery is the main disposal strategy for waste that cannot be reused or recycled, and a well-established source of energy in Europe, especially in Sweden where 2.2 Mtonnes of waste including domestic and imported municipal solid waste (MSW) and waste wood (WW) were combusted during 2015. LÄS MER

4. 8. Dioxins and dioxin-like compounds in thermochemical conversion of biomass : formation, distribution and fingerprints

   Författare :Qiuju Gao; Stina Jansson; Bogdan Dlugogorski; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polychlorinated dibenzo-p-dioxins; polychlorinated dibenzofurans; polychlorinated naphthalenes; PCDD; PCDF; PCN; persistent organic pollutants; torrefaction; pyrolysis;

   Sammanfattning : In the transition to a sustainable energy supply there is an increasing need to use biomass for replacement of fossil fuel. A key challenge is to utilize biomass conversion technologies in an environmentally sound manner. LÄS MER

5. 9. Extraction of PCBs and PCDD/Fs from Food and Feed Matrices Using Pressurised Liquid Extraction (PLE)

   Författare :Sune Sporring; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytisk kemi; Analytical chemistry; Feed; Pressurised Liquid Extraction PLE ; Food; PCDD F; PCB;

   Sammanfattning : Since the Belgian dioxin crisis in 1999 there has been a great demand for fast, cheap and reliable methods to analyse food and feed samples. Traditional methods use large amounts of solvent for the extraction, are time demanding and laborious, but new and more sophisticated methods have been developed in recent years. LÄS MER

7. 10. Tracing and apportioning sources of dioxins using multivariate pattern recognition techniques

   Författare :Anteneh Assefa; Mats Professor; Karin Professor; Paul Professor; Patrik Andersson; Shigeki Masunaga; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polychlorinated dibenzo-p-dioxin; polychlorinated dibenzofuran; positive matrix fac- torization; PMF; principal component analysis; PCA; Baltic Sea; sediment core; PCDD F; sources; marine; fish; environmental half-live; peak year; peak level; temporal trend; spatial variation; coastal; offshore; chemical fingerprint; Environmental Science; miljövetenskap;

   Sammanfattning : High levels of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in edible fish in the Baltic Sea have raised health concerns in the Baltic region and the rest of Europe. Thus, there are urgent needs to characterize sources in order to formulate effective mitigation strategies. LÄS MER