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Browsing by Subject "iron speciation"

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    Item type:Thesis, Access status: Restricted ,
    Badania form związania żelaza i wybranych pierwiastków śladowych w glebach polarnych metodą wielostopniowej ekstrakcji sekwencyjnej
    (Data obrony: 2014-05-28) Jakubski, Grzegorz
    Wydział Geologii, Geofizyki i Ochrony Środowiska
    The aim of this work was to evaluate the speciation of iron, manganese and selected trace elements (Zn, Pb, and Cu) in initial polar soils located on the forefield of Werenskioldbreen glacier in West Spitsbergen. For this purpose, a multi-stage sequential extraction method has been applied for three soil samples, collected in different distances from the glacier terminus. Mineral composition and particle size distribution have been determined as well. It has been shown that in the finest grain fraction the amount of primary minerals decrease and secondary phyllosilicates and iron oxides are getting more important. Additionally, the primary phases in older soil are usually more altered than those in younger soils. As a consequence, distant (older) soils contain distinctly more iron in finer fractions and less in coarser fractions than the soil located near the glacier front. In the latter, iron is bound mainly to primary silicates and this speciation appear to be less important in the older soils, where, in turn, Fe oxides content increase. Similar variability has been found in the trace elements distribution.