RUDY DARNIOWE ŻELAZA W OBSZARACH MOKRADŁOWYCH – NA PRZYKŁADZIE KAMPINOSKIEGO PARKU NARODOWEGO

Abstract

BOGS IRON ORE IN THE MARSHY GROUND AREAS – E.G. KAMPINOSKI NATIONAL PARKAbstract. The accumulation of the iron forms(III) precipitating in wetland environments, which is emerging in subsurface conditions is called bogs iron ore. The main factor regulating the precipitation process in the case of bogs iron ore is pH and Eh of environment. An equally important factor is the presence of bacteria that consume iron to their life processes. The process of formation of bogs iron ore in the areas of wetlands runs single-stage – when the stable compounds of iron(II) and iron(III) are precipitated directly from the water or two-stage – due to recrystallization of metastable forms. The major mineral of bogs iron ore is goethite, which often coexists with ferrihydryt. In turn, in reducing environments a vivianite and siderite have the significant contribution. In the Kampinoski National Park the bivalent forms of iron in pore water of proper muck-like soils occur as Fe2+ ion – 70.29–79.14%. Much more irons(II) in water occur under muckous soils in the profile – above 93.99% of bivalent iron content.