Sökning: "mineraler"

Visar resultat 21 - 25 av 170 uppsatser innehållade ordet mineraler.

  1. 21. The Dark Side of Mineral Sourcing : The Responsible Sourcing Practices of Industrial Manufacturing Firms

    Master-uppsats, Karlstads universitet/Handelshögskolan (from 2013)

    Författare :Ajnur Mujanovic; Erik Österberg; [2022]
    Nyckelord :Responsible sourcing; supply chain due diligence; supply chain visibility; traceability; supply chain management; Digital Twin; Etiskt inköp; supply chain due diligence; supply chain visibility; spårbarhet; supply chain management; Digital Twin;

    Sammanfattning : In order to succeed with the Sustainable Development Goals, the mining of minerals will need to not only continue, but increase in the coming years. The extraction of minerals such as gold and cobalt is often associated with human rights violations and the financing of criminal enterprises. LÄS MER

  3. 22. Biogödningsmedel från sjögräs och tång : Ekonomiska förutsättningar att ersätta handelsgödsel

    Kandidat-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Lisaveta Rudaya; Madeleine Skantz; [2022]
    Nyckelord :Seaweed; beach-wrack; commercial fertilizer; sustainable agriculture; circular economy; phosphorus; nitrogen; biofertilizer; Sjögräs; tång; släke; handelsgödsel; hållbart jordbruk; cirkulär ekonomi; fosfor; kväve; biogödsel;

    Sammanfattning : Världsbefolkningens tillväxt sätter stort tryck på livsmedelsproduktionen. För att bemöta den ökande efterfrågan på mat förbrukas stora mängder handelsgödsel i syftet att stimulera tillväxten hos grödor och öka jordbruksmarkens bördighet. LÄS MER

  4. 23. Critical elements scavenged by secondary gypsum and HFO : Determined by sequential extraction combined with mineralogical studies

    Master-uppsats, Luleå tekniska universitet/Geovetenskap och miljöteknik

    Författare :Emma Flodin; [2022]
    Nyckelord :Geochemistry; gypsum; HFO; adsorption; scavenged; critical elements; beryllium; Yxsjöberg; mine waste; Sequential extraction; XRD; SEM-EDS;

    Sammanfattning : The demand for metals is great for the purpose of developing green technologies, and EU has listed 30 metals and minerals that are of critical importance for the maintenance and evolving of today’s society, so called critical materials. However, mining of raw materials generates mine waste which can have adverse effect on human health, ecosystems, and surrounding areas. LÄS MER

  5. 24. It's smart, but is it sustainable? A study of circular and social sustainability in smart grids.

    Master-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Emma Brodén; [2022]
    Nyckelord :Smart grids; smart grid users; circular economy; resource use; social sustainability; sustainability; Earth and Environmental Sciences;

    Sammanfattning : Smart grids are often advertised as more environmentally sustainable compared to their “conventional” counterparts. What is highlighted then is their potential to save energy and integrate more renewables into the grid, thus decreasing CO2-emissions. LÄS MER

  7. 25. Phasing out peat from a co-fired 50 MWth circulating fluidized bed boiler : A theoretical sulfation potential study

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Axel Bergstrand; [2022]
    Nyckelord :Peat; corrosion; fuel mixture; CFB; circulating fluidized bed; S; alkali chlorides; Sulfur; additives; combustion; fuel design; alkali related corrosion;

    Sammanfattning : The chemical company Perstorp AB has a 50 MWth circulating fluidized bed to supply the production plant with process steam. The fuel mixture used shows a large variation with about 20 different fuel fractions that can be divided into the categories, residue wood chips, sludge, forest fuel, animal waste, industrial residues, and peat. LÄS MER