[Cadmium, lead, copper and zinc distribution in soil and its evaluation from the point of view of metal transfer potentials and barriers into plants]
2000
Makovnikova, J. (Vyskumny Ustav Podoznalectva a Ochrany Pody, Bratislava (Slovak Republic))
Knowledge about heavy metals bindings in a soil is the key to their evaluation from the point of soil vulnerability, bioavailability of metals as well as from the view of finding facilities and methods of manipulating their mobility. A methodical process of selecting sequential extraction according to Ziehen and Brummer has been used for a file of 35 soils representing 13 soil types to evaluate bindings of cadmium, lead, cooper and zinc considering particular soil components. A mobile fraction, an aesily mobile fraction, occluted on manganese oxides and coupled with organic mass, which both represent potentially biovailable amount of metal has decreased in the order Cd (76.89%) Pb (49.41%) Cu (32.94%) Zn (32.73% of total content). High rate o cadmium, lead and zinc in the mobile fraction is contained in Podzols and Dystric Cambisol, low rate is characteristic for Haplic Chernozem Rendzina and Chernozem what is in accordance with buffering potencial of particular soil types to cadmium, lead and zinc. In the course of regression relations of biovailable forms of heavy metals and selected soil parameters testing we have determined statistically important interactions between cadmium, lead, coopper, zinc and soil pH value, organic mass content and quality and total content of metals, as well as prediction models for bioavailability contents of metals in soil
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