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Removal of copper from aqueous solutions with zeolites and possible treatment of exhaust materials
Iztok Arčon, Janez Kovač, Margarita Popova, Nataša Zabukovec Logar, 2021, izvirni znanstveni članek

Opis: The mechanism of Cu2+ loading into commercially available natural HEU-type and synthetic LTA-type zeolites for their possible use in environmental processes, such as water and air treatment applications, was studied. Elemental analysis, SEM/EDXS, XRD, XAS and XPS analyses revealed 4-fold coordination of Cu2+ cations with oxygen atoms in the pores, a predominant location of copper atoms on the surface of crystallites and retained crystallinity of zeolites throughout the processes. The post-treatment of Cu2+-loaded samples with HCl and/or NaCl solutions confirmed the predominantly reversible sorption of copper on zeolites from aqueous solutions by ion-exchange mechanism and, therefore, excellent regeneration possibilities for both types of zeolites. Furthermore, with the calcination of exhaust metal-loaded zeolites, catalysts for total toluene oxidation reaction, as a model VOC pollutant, were obtained.
Najdeno v: ključnih besedah
Povzetek najdenega: ...the calcination of exhaust metal-loaded zeolites, catalysts for total toluene oxidation reaction, as a model VOC...
Ključne besede: Cu2+ ion exchange, Total toluene oxidation, X-ray absorption spectroscopy, X-ray photoelectron spectroscopy, Zeolite
Objavljeno: 03.06.2021; Ogledov: 270; Prenosov: 11
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