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Type of publication: research article
Type of publication (PDB): Straipsnis Clarivate Analytics Web of Science / Article in Clarivate Analytics Web of Science (S1)
Field of Science: Statybos inžinerija / Civil engineering (T002)
Author(s): Vaičiukynienė, Danutė;Jakevičius, Leonas;Kantautas, Aras;Vaitkevičius, Vitoldas;Vaičiukynas, Vilimantas;Dvořák, Karel
Title: Conversion of silica by-product into zeolites by thermo-sonochemical treatment
Is part of: Ultrasonics sonochemistry Amsterdam : Elsevier, 2021, vol. 72
Extent: p. 1-8
Date: 2021
Note: Article no. 105426
Keywords: Silica by-product;Thermo-sonochemical treatment;Na-P zeolite;Na-X zeolite
Abstract: The fine powdered silica by-product of processing of aluminum fluoride (fertilizer plant, Lithuania) was used for zeolite synthesis as silica and aluminum source. The effect of sonication time and the time of hydrothermal synthesis on crystallinity of the synthesized zeolite were studied. This allowed the transformation of the by-product to the mixture of Na–P zeolite and Na–X zeolite. It was determined that ultrasonic-assisted hydrothermal action effected the “diamond” shape formation of Na–P zeolite with clear crystal edges. Na–P zeolite had the morphology of pseudo-spherical forms constituted by small plates when hydrothermal treatment (without sonication) was use for the preparation of zeolites. Moreover, it was determined that ultrasonic-assisted hydrothermal method effected a reduction in the crystal size compared with the zeolites which were synthesized only by using hydrothermal synthesis. The total amount of zeolites as high as 88–93% was achieved after 24 h of hydrothermal treatment followed or unfollowed by sonication. By using longer duration (20 min) of ultrasound pretreatment it is possible to reduce the duration of hydrothermal synthesis: from 24 h to 12 h of hydrothermal treatment. In this case, similar results of total amount of zeolites were detected. In the present work, low-cost raw materials, such as silica by-product have been investigated for the production of zeolites
Affiliation(s): Kauno technologijos universitetas
Vandens ūkio ir žemėtvarkos fakultetas
Vytauto Didžiojo universitetas
Appears in Collections:1. Straipsniai / Articles
Universiteto mokslo publikacijos / University Research Publications

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