A Study on the trace metal speciation in the Ružín
نویسنده
چکیده
Štúdium viazania stopových prvkov v sedimente vodnej nádrže Ružín Pre účely posúdenia možnosti využitia fyzikálnych a fyzikálno-chemických metód separácie, vybraná vzorka sedimentu z Ružína bola podrobené 5-stupňovej procedúre sekvenčnej extrakcie (SE) podľa Tessiera (Tessier et al., 1979) a Horowitza (Horowitz, 1991). Vo výluhoch bolo stanovované zastúpenie konštitučných (Fe, Mn, Ca a Mg) ako aj niektorých ťažkých kovov (Cu, Pb, Zn, Ni a Cd). Bolo zistené, že jedna tretina Fe je reaktívna vo forme prevažne amorfných oxyhydroxidov a dve tretiny sú viazané v kryštálových mriežkach silikátov a ílových minerálov. Kryštalické ílové minerály a silikáty viažu 34,3 % Cu, 24,7 % Zn, 41,9 % Pb a 46,3 % Ni. Amorfné oxyhydroxidy Fe(III) a Mn(IV), pravdepodobne pokrývajúce povrch ílových minerálov, však viažu napriek nízkemu zastúpeniu v sedimente až 40,6 % Cu, 44,1 % Zn, 33,8 % Pb a 26,6 % Ni. Humínové látky nakoniec viažu iba 16,1 % Cu, 15,6 % Zn, 19,4 % Pb a 10,0 % Ni.
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