Search for dissertations about: "Cu and Fe cycle"

Showing result 1 - 5 of 9 swedish dissertations containing the words Cu and Fe cycle.

  1. 1. Fractionation of Cu and Fe isotopes in metal-rich mine sites biotic and abiotic processes

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Nathalie Pérez Rodríguez; Luleå tekniska universitet.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Cu and Fe isotopes; fractionation; tailings; plants; phytoremediation; organic amendments; soil bacteria; Cu and Fe cycle; covellite; redox processes; Earth sciences - Exogenous eart sciences; Geovetenskap - Exogen geovetenskap; Applied Geology; Tillämpad geologi;

    Abstract : After mineral exploitation the residual grinded and milled material, rich in sulphide minerals and heavy metals, is often left exposed to the atmospheric variables. This weathered mine waste material can lead to the formation of acid mine drainage (AMD) which has negative effects to the environment. READ MORE

  2. 2. Biotic and abiotic isotope fractionation of copper and iron From the lab to the field scale

    University dissertation from Luleå tekniska universitet

    Author : Nathalie Pérez Rodríguez; Luleå tekniska universitet.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

    Abstract : The distribution of the stable isotopes of Cu and Fe in nature is susceptible to isotope fractionation processes during the biogeochemical cycle. Since Cu and Fe are redox sensitive metals, differences in their oxidation states can lead to variations in the stable isotope composition of the aquatic species or compounds that they form. READ MORE

  3. 3. Studies on Rechargeable Fe-air electrodes in Alkaline electrolyte

    University dissertation from Stockholm : KTH

    Author : Alagar Raj Paulraj; KTH.; [2019]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Fe-air battery; Cu Sn-doped nanostructured iron electrodes; Alkaline electrolytes; Bi-functional OER ORR catalyst; perovskite spinel catalyst; NiFeOx; air electrode; Chemical Engineering; Kemiteknik;

    Abstract : Energy storage system is an important component in the energy system based on variable renewable energy sources into the grid. Energy storage system could contribute to decarbonization, energy security, offset the demand and supply of the electricity sector, especially for the electric grid. READ MORE

  4. 4. Iron in Haem Biosynthesis. Structural Studies of Ferrochelatase and Frataxin

    University dissertation from KFS AB

    Author : Tobias Karlberg; Lunds universitet.; Lund University.; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Naturvetenskap; Natural science; Molekylär biofysik; Molecular biophysics; Biomedicinska vetenskaper; Biomedical sciences; protein crystallography; ferrochelatase; haem biosynthesis; iron; frataxin;

    Abstract : Popular Abstract in Swedish Järn är ett metalliskt grundämne som tillhör övergångselementen i det periodiska systemet. Den kemiska beteckningen är Fe (av det latinska ordet ferrum). Järn har visat sig vara ett väldigt viktigt ämne för i princip allt liv på vår planet. READ MORE

  5. 5. Oxygen Carriers Materials for Chemical-Looping Technologies

    University dissertation from KFS AB

    Author : Muhammad Qamar Ul Islam Zafar; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Natural gas; Reaction kinetics; Oxygen carriers; Chemical-looping reforming; TGA; Chemical-looping combustion; CO2; Metal oxides;

    Abstract : Carbon dioxide is the gas which contributes most to the greenhouse effect. It is released in large quantities from fossil fuel-based power plants around the world. It is generally accepted that a rapid decrease in the emissions of carbon dioxide is needed. READ MORE