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Original scientific article

BENTONITE/IRON OXIDE MAGNETIC COMPOSITES: CHARACTERIZATION AND APPLICATION AS Pb(II) ADSORBENTS

By
Zuzana Danková ,
Zuzana Danková

Institute of Geotechnics, Slovak Academy of Sciences Košice, Košice, Slovakia

Erika Fedorová ,
Erika Fedorová

Institute of Geotechnics, Slovak Academy of Sciences Košice, Košice, Slovakia

Alexandra Bekényiová
Alexandra Bekényiová

Slovak Academy of Sciences Košice, Košice, Bosnia and Herzegovina

Abstract

The natural clay bentonite (B) as adsorbent of lead cations was studied. To enhance its adsorption capacity, the coating by iron oxide particles, in two selected weight ratios: 2:1 (BM1) and 4:1(BM2), was used. The changes of the textural and surface parameters after the modification were studied by the low temperature nitrogen adsorption, XRD and SEM method, Mössbauer spectroscopy. The Pb(II) adsorption experiments were studied under the different conditions, such as pH of the model solutions, contact time and initial metal ion concentration. Higher adsorption rates of BM1 and BM2 samples were observed for lower initial metal ion concentrations.

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