Inorganically modified smectites for environmental applications

0565071 - ÚGN 2023 RIV PL eng A - Abstract
Valovičová, Věra - Vaculíková, Lenka - Plevová, Eva - Dolinská, S. - Znamenáčková, I. - Vallová, S. - Napruszewska, B. D. - Serwicka, E. M.
Inorganically modified smectites for environmental applications.
Book of Abstracts of MECC 20/22. Krakov: Wydawnictwo Naukowe Akapit, 2022 - (Górniak, K.; Szydlak, T.; Sek, M.). s. 94-94. ISBN 978-83-65955-60-9.
[Jubilee Mid-European Clay Conference MECC‘20/22 /10./. 12.09.2022-15.09.2022, Kliczkow]
Grant - others:AV ČR(CZ) SAV-21-08
Program: Bilaterální spolupráce
Institutional support: RVO:68145535
Keywords : clay minerals * modification * sorption
OECD category: Analytical chemistry
https://www.dttg.ethz.ch/Abstract%20book%20mecc20.pdf

Smectites represent promising starting nanomaterials for the design and preparation of multifunctional eco-friendly clay composites with predefined properties and a wide range of environmental applications. In this work, composite materials based on montmorillonite/manganese dioxide (MMT/MnO2) were synthetized by chemical treatment of clay matrix. Advanced techniques including XRD, XRFS, FT-IR, TG/DSC, SEM and N2 adsorption/desorption were used for detailed physico-chemical characterization of obtained composites. The MMT/MnO2 composites exhibited specific surface area ranging from 80 to 116 m2/g and mesoporous texture. MnO2 component formed in a presence of a clay matrix appeared as cryptomelane with a tunnel structure. The prepared materials were tested for their potential use as effective catalysts for the oxidation of volatile compounds and also for their application as effective sorbents for the removal of pharmaceuticals from wastewater. The obtained MMT/MnO2 composites showed catalytic activity on model compounds of ethanol and toluene, sorption properties on selected antibiotics (ampicillin and amoxicillin) and higher thermal stability. Textural properties of MMT/MnO2 samples facilitated the dispersion of the catalyst active phase and their high specific surface area enhanced their catalytic effects. Sorption experiments have demonstrated the ability to remove up to 90% of ampicillin and amoxicillin.
Permanent Link: https://hdl.handle.net/11104/0336616