Search for dissertations about: "scarce metals"

Showing result 11 - 15 of 21 swedish dissertations containing the words scarce metals.

  2. 11. Structuring empirical knowledge on environmental issues : urban heavy metal metabolism

    Author : Johan Hedbrant; Ulrik Lohm; Linköpings universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Föroreningsfrågor; metodik; tungmetaller; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Abstract : During the last century, there has been a large import of heavy metals to urban areas. Only a small fraction, about 10%, has reached the biosphere, the rest is still residing in various goods such as cables, construction materials, technical equipment and batteries, which are still in use or abandoned in infrastructure, buildings, households, enterprises and vehicles. READ MORE

  4. 12. Photocatalysis beyond conventional precious metal complexes

    Author : Rickard Lindroth; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Heterogenization; Iron photocatalysis;

    Abstract : Precious metals, e.g. Ru and Ir, are expensive, scarce and non-renewable resources. As oppose to many renewable resources, these cannot be deliberately produced wherever one wishes. READ MORE

  5. 13. Photoredox Catalysis Driven by Visible Light and Iron N-Heterocyclic Carbene Complexes

    Author : Lisa de Groot; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; photoredox catalysis; iron N-heterocyclic carbene complexes; Fe-NHC; Visible light; ATRA; BHAS;

    Abstract : Photoredox catalysis is a rapidly expanding field, in which organic transformations are catalysed using light. The most commonly used photoredox catalysts (PCs) are transition metal complexes which absorb in the visible region of the electromagnetic spectrum. READ MORE

  6. 14. Leaching of Hazardous Substances from Concrete Constituents and Painted Wood Panels

    Author : Åse Togerö; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thiocyanate; biocides; leaching; runoff; admixture; coatings; resin acids; blast furnace slag; toxic; fly ash; cement; tall oil; diffusion paints; concrete;

    Abstract : At a time of increased concern about environmental issues in the building sector, it is essential to know the environmental performance of different building materials. Knowledge of the possible release of hazardous substances in building materials is scarce, and these aspects have often been neglected in environmental assessment methods. READ MORE

  7. 15. New aspects of electronic interactions of keV ions with matter

    Author : Barbara Bruckner; Daniel Primetzhofer; Peter Bauer; Marika Schleberger; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ToF-MEIS; LEIS; electronic stopping; charge exchange; scattering potential; Fysik; Physics;

    Abstract : Low- and medium-energy ion scattering are powerful techniques to perform high-resolution depth profiling with sub-nanometer resolution. Typically, ions with primary energies between a few keV and a few hundred keV are used to probe the sample and backscattered projectiles are detected. READ MORE