Sökning: "iron cycling"
Visar resultat 21 - 25 av 41 avhandlingar innehållade orden iron cycling.
21. Rechargeable Aqueous Batteries Based on Available Resources : Investigation and Development towards Efficient Battery Performance
Sammanfattning : Batteries employing water based electrolytes enable extremely low manufacturing costs and are inherently safer than Li-ion batteries. Batteries based on zinc, manganese dioxide, iron, and air have high energy relevancy, are not resource restricted, and can contribute to large scale energy storage solutions. LÄS MER
22. Inorganic chemistry of phosphorus cycling in fresh and marine waters
Sammanfattning : In the present Thesis, new results are reported on critical chemical mechanisms controlling the cycling of phosphorus in aquatic environments. These findings have implications for several fields of earth system sciences, including large-scale global change, both Recent and in older geological periods. LÄS MER
23. Dissolved and suspended transport of tungsten, molybdenum, and vanadium in natural waters
Sammanfattning : Some transition metals and metalloids occur primarily as oxyanions in natural waters including antimony, arsenic, chromium, molybdenum, tungsten and vanadium. These oxyanions can pass through cell walls along the same pathways as phosphate or sulfate. Some of these oxyanions are essential for life, but in high concentrations they become all toxic. LÄS MER
24. Role of manganese redox cycling for trace metals in the Baltic Sea
Sammanfattning : Redox zones are defined by steep gradients of changing concentrations and changing redox potential. They form a transition zone between oxic and anoxic/sulfidic conditions, where nitrate, manganese and iron reduction occurs. These redox zones can be situated in the sediment as well as in the water column. In the Baltic Sea both types are found. LÄS MER
25. Fiber Optic Sensors for Monitoring of Lithium- and Sodium-ion Batteries
Sammanfattning : Rechargeable batteries, particularly lithium-ion batteries, have rapidly evolved since their introduction and now dominate the market, owing primarily to their high energy and power densities. With growing demand for high-performance batteries in portable electronics and electric vehicles, the need for safe, efficient, and reliable batteries is crucial. LÄS MER