Sökning: "cation exchange"
Visar resultat 16 - 20 av 49 avhandlingar innehållade orden cation exchange.
16. Bonding and Diffusion of Molecules in Zeolites by ESR and ENDOR
Sammanfattning : This thesis studies bonding and diffusion of molecules in zeolites by Electron Spin Resonance (ESR) and Electron Nuclear Double Resonance (ENDOR). In the first part an introduction is given. In the second part (chapter 2) the detailed structure of a Cu2+ complex with water molecules in Cu-ZSM-5 zeolite was characterized with ENDOR at 4 K. LÄS MER
17. Phosphorus recycling from wastewater to agriculture using reactive filter media
Sammanfattning : This thesis focused on testing the suitability of reactive filter media used for phosphorus (P) removal from wastewater as fertilizers, thus recycling P to agriculture. The work compared the P sorption capacity of several materials in order to assess their suitability as a source of P for plants. LÄS MER
18. Outline of Titanium (IV) based H2PO4 Ion-exchangers: Kinetics and Sorption models
Sammanfattning : Decontamination of industrially polluted waters has been enclosed in REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) since 2007, when it entered into force in the European Union, which emphasized the need to search for more effective sorbents. Many studies on inorganic ion-exchangers have been carried out due to the scientific interest towards their high mechanical and thermal stabilities, high resistance to oxidation and high sorption capacity regarding transition and radioactive metal ions. LÄS MER
19. Electrolyte-Based Dynamics: Fundamental Studies for Stable Liquid Dye-Sensitized Solar Cells
Sammanfattning : The long-term outdoor durability of dye-sensitized solar cells (DSSCs) is still a challenging issue for the large-scale commercial application of this promising photovoltaic technique. In order to study the degradation mechanism of DSSCs, ageing tests under selected accelerating conditions were carried out. LÄS MER
20. Correlation effects in ionic perovskite crystals
Sammanfattning : Perovskites are a large family of versatile materials with favourable properties for spintronics and optoelectronics applications. The mineral CaTiO3 defines the archetypal crystal structure of perovskite materials with a general composition ABX3. LÄS MER