Synthesis, characterization and testing of a new material obtained on the basis of natural clay intercalated with silver ions
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2024-02-15 16:36
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MIRILA, Diana-Carmen, RADUCANU, Dumitra, ROSU, Ana-Maria, GEORGESCU, Ana-Maria, NISTOR, Ileana-Denisa. Synthesis, characterization and testing of a new material obtained on the basis of natural clay intercalated with silver ions. In: Modern Technologies in the Food Industry, Ed. 5, 20-22 octombrie 2022, Chişinău. Chișinău, Republica Moldova: 2022, p. 29.
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Modern Technologies in the Food Industry 2022
Conferința "Modern Technologies in the Food Industry"
5, Chişinău, Moldova, 20-22 octombrie 2022

Synthesis, characterization and testing of a new material obtained on the basis of natural clay intercalated with silver ions


Pag. 29-29

Mirila Diana-Carmen, Raducanu Dumitra, Rosu Ana-Maria, Georgescu Ana-Maria, Nistor Ileana-Denisa
 
"Vasile Alecsandri" University of Bacau
 
Disponibil în IBN: 23 ianuarie 2023


Rezumat

facile, ecofriendly, and cost-effective method was developed to prepare a microporous material based on natural chemically modified bentonite with silver ions (BN-Ag0). This material presents a good catalytic activity against Malachite Green (MG) dye and bacteriostatic activity against newly isolated bacterium from sewage sludge named hereafter “ISO SS” and Escherichia coli (E. coli). MG is usually used in agriculture and the fish industry as a strong anti-bacterial, anti-fungal, anti-parasitic and dye agent, but it is also used to give color to textiles, packaging, etc. BN-Ag0 was characterized by the following methods: energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), Fourier-transform infrared (FTIR) spectroscopy, temperature programmed desorption (TPD) and X-ray Diffraction (XRD). The newly bacterium ISO SS was isolated by the technique of isolating the pure culture of anaerobically stabilized sludge. A mandatory characterization of ISO SS isolated strains from anaerobic stabilized sludge was performed in the process of bacterial species identifying. The cationic clay-based nanomaterial showed appreciable antibacterial activity against ISO SS, a Gram-negative bacterium. It also showed good activity against E. coli bacteria. Involved as a catalyst in the catalytic ozonation of MG dye, BN-Ag0 significantly improves the oxidation time of the dye, due to its good adsorption and catalytic properties. The catalytic and antibacterial activities of the natural bentonite (BN) and of BN-Ag0 were examined using performant characterization techniques. The lifetime of BN-Ag0 catalyst was also evaluated. The recycling analysis of the synthesized nanocomposite showed that the BN-Ag0 is stable even after six recycling with a minor change in degradation. The studied nanomaterial (BN-Ag0) presents interesting properties both for the oxidative degradation of MG-type dyes and for a wider use due to its antibacterial properties. Results obtained are expected to provide valuable findings for the preparation of a good microporous material with multiple functionalities

Cuvinte-cheie
Antibacterial activity, bacteria, clay, catalytic ozonation, dye, silver catalyst