Removal of Copper from Aqueous Solutions with Zeolites and Possible Treatment of Exhaust Materials. Issue 6 (18th March 2021)

• Record Type: Journal Article
• Authors: Logar, Nataša Zabukovec; Arčon, Iztok; Kovač, Janez; Popova, Margarita
• Other Names: Stöcker Michael guestEditor.; Kärger Jörg guestEditor.; Wagemann Kurt guestEditor.
• Is Part Of: Chemie Ingenieur Technik. Volume 93:Issue 6(2021)
• Page Start: 941
• Page End: 948
• Publication Date: 2021-03-18
• Subjects: Cu2+ ion exchange -- Total toluene oxidation -- X‐ray absorption spectroscopy -- X‐ray photoelectron spectroscopy -- Zeolite; Chemical engineering -- Patents -- Periodicals; Chemical engineering -- Periodicals; Chemical industry -- Periodicals; Chemistry, Technical -- Periodicals; 660.05
• DOI: 10.1002/cite.202000188
• Languages: English
• ISSNs: 0009-286X

Abstract

Abstract: The mechanism of Cu 2+ 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 Cu 2+ 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 Cu 2+ ‐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. Abstract : Two types of commercial zeolites (HEU and LTA) proved very efficient for copper removal from aqueous solutions, and showed excellent regeneration ability. Furthermore, the exhaust material proved to be catalytically active in VOC removal from air (total toluene oxidation reaction test).