Crystal Structure, Magnetic and Photocatalytic Properties of Solid SolutionsBi2‐xLaxFe4O9 (x=0.05, 0.1)

Glinskaya, Anna; Petrov, G. S.; Vialikanava, I. A.; Romanovski, Valentin

doi:10.1002/slct.202204285

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…Obtained results for MgO–CeO 2 composites (Table 3) showed the 10‐times‐higher effectiveness of ATB degradation rate compared to the use of 2 wt% Dy‐doped CdSe catalyst combined with ultrasonic treatments as reported in Khataee et al ., 40 and compared to the continuous electro‐Fenton process using modified graphite electrode with multi‐walled carbon nanotubes/surfactant 41 . The use of MgO–CeO 2 composites showed up to 20‐fold higher results compared to Fe 3 O 4 –MnO 2 and Fe 3 O 4 /H 2 O 2 42 and twofold higher results compared to Bi 1.9 La 0.1 Fe 4 O 9 43 . Published articles did not report studies of the photodegradation of DBB.…”

Section: Resultsmentioning

confidence: 93%

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Mesoporous nanocomposites based on CeO₂ and MgO: preparation, structure and photocatalytic activity

Мацукевич

Kulinich

Kul’bitskaya

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUNDSelf‐propagating high‐temperature synthesis was used to create mesoporous CeO2 and MgO powders as well as nanocomposites based on them for efficient degradation of organic dyes.RESULTSIt has been investigated how magnesium oxide and cerium oxide interact to affect the crystal structure, morphology and microstructure of the materials produced. It was assumed that CeO2 forms on the surface of MgO while the material's developed surface is preserved. The values of the specific surface area and average pore diameter of the studied samples depend on the composition and vary in the ranges of 16–41 m2 g−1 and 11.919 nm, respectively.CONCLUSIONIt has been established that the sizes of CeO2 crystallites in the composition of nanocomposites change insignificantly and range from 6.5 to 7.4 nm. The photocatalytic activity of the studied samples is at least two times higher compared to analogs. The samples MgO–CeO2 (30 mol%) and MgO–CeO2 (50 mol%) showed the maximum photodegradation efficiency of acid telon blue and direct bright blue dyes at levels of 98.5% and 92.5%, respectively. © 2023 The Authors. Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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Section: Resultsmentioning

confidence: 93%

“…41 The use of MgO-CeO 2 composites showed up to 20-fold higher results compared to Fe 3 O 4 -MnO 2 and Fe 3 O 4 / H 2 O 2 42 and twofold higher results compared to Bi 1.9 La 0.1-Fe 4 O 9 . 43 Published articles did not report studies of the photodegradation of DBB. However, our studies show that its degradation is comparable to that of ATB.…”

Section: (E)-(h))mentioning

confidence: 99%

Mesoporous nanocomposites based on CeO₂ and MgO: preparation, structure and photocatalytic activity

Мацукевич

Kulinich

Kul’bitskaya

et al. 2023

J of Chemical Tech & Biotech

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Optimizing Dye Wastewater Purification: Ultrasonic and Flotation With Ozonation Synergy

Romanovski,

Pilipenko,

Dubina

et al. 2024

Engineering Reports

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The article presents the results of experimental studies of the efficiency of purification of model and real wastewater from dyeing and finishing industries using pneumatic flotation using an ozone‐air mixture instead of air and a combination of ultrasonic treatment and ozonation. The influence of gas mixture consumption, dye concentration, and ozone concentration in the gas mixture on the cleaning efficiency was studied. The purification efficiency was assessed by optical density and COD. By using an ozone‐air mixture instead of air in the flotation process, an efficiency increase of up to 12 times was achieved. It has also been shown that wastewater treatment efficiency increases by up to 12% when combining ozone‐air flotation with ultrasonic treatment at 630 W and operating frequency 22% ± 10% kHz. This effect may be associated, first of all, with the dispersion of bubbles of the ozone‐air mixture, which leads to an increase in their total surface and, accordingly, to the rise in the kinetics of mass transfer—ozone dissolution.

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Optimizing Oil-Contaminated Wastewater Purification with Polypropylene Thread Waste

Gruzinova,

Romanovski

2024

Waste Biomass Valor

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The increasing generation of oil-containing wastewater poses significant environmental challenges, necessitating the development of effective and sustainable filtration materials. Polypropylene thread scraps, a waste product from textile manufacturing, present a potential low-cost alternative to industrially produced polypropylene fibrous filters. This study evaluates the filtration properties of these scraps to determine their viability for oil product removal from wastewater. The polypropylene thread scraps exhibited promising physical characteristics: a fiber diameter range of 10–120 μm, bulk density between 100 and 200 kg/m3, total porosity of 78–89%, and a specific surface area of 75 m2/kg. Their hydrophobic nature is comparable to that of commercial polypropylene filter materials. Experimental studies demonstrated that the thread scraps could effectively remove oil products at a 70% efficiency, with a maximum specific wastewater volume of 8 L/g. The oil capacity for oil products was measured at 51.1 mg/g, which decreased to 36.2 mg/g after regeneration by washing with hot water at 70 °C. The optimal filtration parameters were identified as a material packing density of 65 kg/m3, filtration speed of 3.5 m/h, and a loading height of 1.5 m, achieving removal efficiencies of 82.0% for oil products and 91.5% for suspended solids. Polypropylene thread scraps demonstrate significant potential as a sustainable filtration material for oil-containing wastewater, offering comparable performance to industrial filters. Their ability to be regenerated and reused further enhances their cost-effectiveness and environmental benefits. This research supports the use of polypropylene thread scraps as a viable solution for wastewater treatment, contributing to waste reduction and improved environmental management. Graphical abstract

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Crystal Structure, Magnetic and Photocatalytic Properties of Solid SolutionsBi_2‐xLa_xFe₄O₉ (x=0.05, 0.1)

Cited by 3 publications

References 33 publications

Mesoporous nanocomposites based on CeO₂ and MgO: preparation, structure and photocatalytic activity

Mesoporous nanocomposites based on CeO₂ and MgO: preparation, structure and photocatalytic activity

Optimizing Dye Wastewater Purification: Ultrasonic and Flotation With Ozonation Synergy

Optimizing Oil-Contaminated Wastewater Purification with Polypropylene Thread Waste

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Crystal Structure, Magnetic and Photocatalytic Properties of Solid SolutionsBi2‐xLaxFe4O9 (x=0.05, 0.1)

Cited by 3 publications

References 33 publications

Mesoporous nanocomposites based on CeO2 and MgO: preparation, structure and photocatalytic activity

Mesoporous nanocomposites based on CeO2 and MgO: preparation, structure and photocatalytic activity

Optimizing Dye Wastewater Purification: Ultrasonic and Flotation With Ozonation Synergy

Optimizing Oil-Contaminated Wastewater Purification with Polypropylene Thread Waste

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Product

Resources

About

Crystal Structure, Magnetic and Photocatalytic Properties of Solid SolutionsBi_2‐xLa_xFe₄O₉ (x=0.05, 0.1)

Mesoporous nanocomposites based on CeO₂ and MgO: preparation, structure and photocatalytic activity

Mesoporous nanocomposites based on CeO₂ and MgO: preparation, structure and photocatalytic activity