Influence of zeolite application on heavy metal contents in soils and their bioavailability
Szabova, T.(Technicka univ., Kosice (Slovak Republic) | Zahuranec, E. | Koscova, M.
Characterization of soils contamination with releasable heavy metal contents is not quite objective, because individual elements in soils occur in various forms what reflects in various degree of toxicity as well as plants and food chain contamination. Limitation factor of uptake of heavy metals by plants is their content in bioavailable forms. Influence of zeolite application to soils contaminated with heavy metals significantly decreased zinc and lead contents. The contents of cuprum, chromium and nickel was not expressive reduced in compared with their controll contents. Addition of zeolite significantly reduced zinc content off 3.3-46.3% and lead off 6.7-44.8% in releasable forms, zinc contentt off 10.3-55% and lead off 18.9-48.2% in mobilizable forms, zinc content off 26.7-46.6% and lead content off 0-46.6% in mobile forms in compared of content of controll samples. By application of zeolite is possible reduce of bioavailability of heavy metals in soils.
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