Sökning: "pyrolysis-GC MS"

Hittade 5 avhandlingar innehållade orden pyrolysis-GC MS.

  1. 1. Molecular analysis of lake-sediment organic matter : long-term dynamics and environmental implications in boreal lakes

    Författare :Sofia Ninnes; Richard Bindler; Xiao-Ru Wang; Christian Bigler; Hendrik Vogel; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lake sediment; Holocene; organic matter; Pyrolysis-GC MS; mid-infrared spectroscopy; boreal;

    Sammanfattning : Lake sediment organic matter is material composed of residues from plants, algae, animals, fungi and bacteria. Its molecular composition is dependent on the sources as well as secondary biotic and abiotic transformations, which combined generates a highly complex matrix. LÄS MER

  3. 2. Chemical and morphological characterisation of long-term properties of environmentally degradable polymers

    Författare :Carina Eldsäter; KTH; []
    Nyckelord :;

    Sammanfattning : The environmental degradation of an aliphatic polyester,poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and a polyesteramide,poly(butylene adipate-co-amino caproate) (PEA) was studied to answer questionsregarding their life-time in natural environments,e.g.municipal solid waste compost. LÄS MER

  4. 3. Agro-Waste Derived Additives for Polylactide and Tapioca Starch

    Författare :Edwin Azwar; Minna Hakkarainen; Anna Wistrand; Christian Glandfils; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Agro-industrial waste; wood flour; rice bran; polylactide; starch; biomass; degradation; SRA - E-vetenskap SeRC ; SRA - E-Science SeRC ;

    Sammanfattning : Development of materials from renewable resources is one of the big challenges facing our world. In this thesis agro-industrial waste derivatives were developed and evaluated as additives for two common renewable polymer matrices, polylactide (PLA) and starch. Two waste products, wood flour (WF) and rice bran (RB) were evaluated in different forms. LÄS MER

  5. 4. Chemical Properties and Thermal Behaviour of Kraft Lignins

    Författare :Ida Brodin; Göran Gellerstedt; Elisabeth Sjöholm; Hans Theliander; Ulrica Edlund; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytical chemistry; Analytisk kemi;

    Sammanfattning : Research concerning lignin has increased during the last years due to its renewability and ready availability in black liquor at pulp mills. Today, the kraft lignin found in black liquor is used as a fuel to gain energy in the recovery boiler at the mill. LÄS MER

  7. 5. Microplastics in the urban environment : Concentrations and composition in stormwater sediments and UV-degradation of common litter

    Författare :Lisa Öborn; Helene Österlund; Maria Viklander; Mats Gustafsson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Microplastic; stormwater; sediment; VA-teknik; Urban Water Engineering;

    Sammanfattning : Microplastics (MPs) are small pieces of plastic material including tyre wear particles (TWPs) smaller than 5000 µm. One of the primary pathways through which MPs including TWPs enter aquatic and marine environments is stormwater runoff from urban areas. LÄS MER