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Title: EFFECTS OF CHEMICAL AND THERMAL TREATMENT OF FINE DISPERSED GEORGIAN HEULANDITE-CLINOPTILOLITE
EFFECTS OF CHEMICAL AND THERMAL TREATMENT OF FINE DISPERSED GEORGIAN HEULANDITE-CLINOPTILOLITE

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Nato Mirdzveli; Vladimer Tsitsishvili ; Nanuli Dolaberidze; Manana Nijaradze; Bela Khutsishvili
10.5593/sgem2024v/4.2/s17.14
10.5593/sgem2024v/4.2
1314-2704
978-619-7603-77-4
English
24
4.2
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Recycling, Waste Management, and Circular Economy
The article considers the processes leading to a change in the structure and properties as a result of calcination followed by acid treatment of heulandite-containing tuff from the Georgian Dzegvi-Tedzami deposit. The samples obtained by heat-acid treatment were studied by the X-ray energy dispersion spectra and diffraction patterns, as well as by adsorption of water and benzene methods. It was found that pre-heat treatment reduces weight loss and the degree of dealumination during subsequent acid treatment, and also affects the decationization process: with increasing preheating temperature, the participation of sodium ions in the process slows down, while the participation of potassium ions increases, the overall degree of decationization decreases, and after annealing at 800 °C, compensating cations do not wash out. The crystalline structure of heulandite is preserved after heating to 400-450 °C and subsequent acid treatment, which is confirmed by the preservation of the peak positions in the X-ray diffraction patterns; the change in peak intensity depends on the acid concentration and is associated with changes in the content and distribution of cations. After heating to 500 °C and higher temperatures, the acid-treated samples transform into an amorphous state with crystalline inclusions of chabazite, ?-quartz and albite feldspar. The adsorption of water, reflecting the volume of micropores and all pores, as well as the adsorption of benzene, reflecting the hydrophobicity of the surface, decrease with increasing calcination temperature; subsequent acid treatment is of little significance.
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This work was supported by Shota Rustaveli National Science Foundation of Georgia (SRNSFG), grant number AR-22-610 “Production of paper with bactericidal and improved surface properties”.
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https://doi.org/10.5593/sgem2024v/4.2/s17.14
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EFFECTS OF CHEMICAL AND THERMAL TREATMENT OF FINE DISPERSED GEORGIAN HEULANDITE-CLINOPTILOLITE
Proceedings of 24th International Multidisciplinary Scientific GeoConference SGEM 2024
24th International Multidisciplinary Scientific GeoConference SGEM 2024, 27 - 30 November, 2024
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
93-100
27 - 30 November, 2024
website
10106
heulandite, chabazite, dealumination, decationization, dehydration, amorphization

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