Naslov (eng)

Selenium removal from aqueous medium by iron-modified natural clinoptilolite and a possible use of the selenium-loaded clinoptilolite

Autor

Jevtic, Sanja
Pavlović, Jelena
Matijasevic, Danka
Arcon, Iztok
Niksic, Miomir
Rajic, Nevenka

Opis (eng)

Abstract: In this study, iron(III)-modified natural zeolite tuff (Fe-CLI) from the Serbian deposit Zlatokop has been investigated as an adsorbent for the selenium oxyanions. The results have shown that the adsorption capacity of Fe-CLI for both Se(IV) and Se(VI) depends on pH and decreases with increasing pH-value. The adsorption affinity of Fe-CLI was found to be higher for Se(IV) than for Se(VI). The kinetic data follow the pseudo-second-order model and the obtained parameters k indicate that the rates of adsorption and desorption are higher for selenate ion. EXAFS and XANES analyses revealed that selenium is bound in the form of oxo-complexes to Fe(III) cations at the zeolite surface. The obtained Se-containing zeolite samples were tested as soil supplements for the cultivation of Pleurotus ostreatus mushroom. The mushrooms extracted inorganic Se from the Se-containing zeolite transforming it to a more valuable organically bound form.

Jezik

engleski

Datum

2013

Licenca

© All rights reserved

Predmet

clinoptilolite, EXAFS, XANES, selenium, mushroom

Deo kolekcije (1)

o:508

Institut za zemljište