New diatomaceous earth and kaolinite ceramic membranes for turbidity reduction in water

Кузьминчук, А. А.; Burmak, А. P.; Litynska, Marta; Dontsova, Tetiana

doi:10.1007/s13204-023-02792-8

Cited by 3 publications

(2 citation statements)

References 47 publications

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“…The use of natural raw materials makes it possible to produce low-cost ceramic membranes, which significantly reduces capital expenditures (Kuzminchuk et al 2023;Mestre et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Physicochemical and Antibacterial Properties of Ceramic Membranes Based on Silicon Carbide

Molchan,

Vorobyova,

Vasyliev

et al. 2024

Preprint

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The article is devoted to the synthesis of ceramic membranes based on silicon carbide and the study of their mechanical, electrical, and antibacterial properties. SiC-based ceramic membranes have a few advantages, namely high surface hydrophilicity, good water permeability and negative surface charge, which leads to better performance during their operation. The effect of carbonate type and addition of liquid glass on the physicochemical properties of ceramic membranes was investigated using diffraction analysis and scanning electron microscopy. It was found that regardless of the carbonate type, only two phases can be identified: the main phase in the original mixture is silicon carbide and an additional phase added to the mixture is corundum. The transport properties obtained (9.03–18.66 cm3/(min·cm2)), and the results of electron microscopy indicate the macroporosity of ceramic membranes based on silicon carbide (13–20 µm). Ceramic membranes of high strength (16.3–46.8 MPa) were obtained. Studies on antibacterial properties have shown that SiC-based ceramic membranes do not exhibit antibacterial properties. The additional modification of ceramic membranes with titanium oxide has given ceramic membranes based on silicon carbide antibacterial properties, as evidenced by the inhibition of the growth of gram-negative bacteria, the effectiveness of which depends on the number of selective layers based on TiO2 applied. The results of this study are useful to enrich the knowledge of the production of silicon carbide membranes and are aimed at the future research and development of selective membranes (micro- and ultrafiltration) based on them.

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“…The use of natural raw materials makes it possible to produce low-cost ceramic membranes, which significantly reduces capital expenditures (Kuzminchuk et al 2023;Mestre et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Physicochemical and Antibacterial Properties of Ceramic Membranes Based on Silicon Carbide

Molchan,

Vorobyova,

Vasyliev

et al. 2024

Preprint

Self Cite

View full text Add to dashboard Cite

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“…Among existing membrane materials, ceramic membranes are particularly interesting due to their high mechanical strength, good resistance to organic solvents, and stability in various pH or temperature conditions, making them suitable for use in diverse industrial sectors [5,6,7]. A ceramic membrane consists of a porous base (support), an intermediate layer, and a top separating (selective) layer [8].…”

Section: Introductionmentioning

confidence: 99%

Physico-chemical characterisation of selective TiO2 layer on kaolin-based ceramic membranes

Kyrii,

Misevych,

Romaniuk

et al. 2023

Preprint

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The selective layer in a ceramic membrane is crucial for separation and filtration processes, as it endows the membrane with specific properties and functions, determining its selectivity and suitability for various applications. This study aimed to investigate the impact of the type of composition used to create a selective layer on low-cost clay ceramic membranes and to determine their physicochemical properties and permeability. In this study, a ceramic membrane substrate based on kaolin was synthesized and characterized using XRD, thermal analysis, and IR spectroscopy, and its mechanical properties were also tested. Selective layers on the ceramic membrane were synthesized with various compositions using spin-coating. They were characterized using IR spectroscopy, diffuse reflectance absorption spectrum, and scanning electron microscopy (SEM). The SEM images of all samples show a dense structure typical of clay materials. These images indicate that the composition and number of layers have minimal impact on the morphology in this case. The obtained ceramic membranes are characterized by a pore size ranging from 50 – 200 μm. The permeability of the ceramic membrane support is 40 cm3/min·cm2, which decreases with the application of selective layers. Selectivity by turbidity increases from 32% to 66.4%.

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The Diatomite Grinding Technology Concept for the Protection of Diatomite Shells and the Control of Product Grading

Stempkowska,

Gawenda,

Smoroń

2024

Materials

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Diatomite deposits in Poland are located in the Podkarpackie Voivodeship, and the only active deposit is in Jawornik Ruski. Therefore, it is a unique material. Improved rock processing methods are constantly in demand. In the research presented here, we have used research methods such as X-ray diffraction (XRD), scanning electron microscope (SEM), particle shape analysis, and appropriate sets of crushing machines. Diatomite comminution tests were carried out on test stands in different crushers (jaw crusher, hammer crusher, high-pressure roller press, ball mill) using different elementary crushing force actions: crushing, abrasion, and impact, occurring separately or in combination. The machines were tested with selected variable parameters to obtain products with a wide range of grain sizes ranging from 0 to 10 mm. The ball mill (yield 87%, system C3) and the hammer crusher with HPGR (high-pressure grinding roller) (yield 79%, system D2 + D3) have the greatest impact on diatom shell release and accumulation in the finest 0–5 μm and 5–10 μm fractions. For commercial purposes, it is important to obtain very fine fractions while keeping the shells undisturbed.

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New diatomaceous earth and kaolinite ceramic membranes for turbidity reduction in water

Cited by 3 publications

References 47 publications

Physicochemical and Antibacterial Properties of Ceramic Membranes Based on Silicon Carbide

Physicochemical and Antibacterial Properties of Ceramic Membranes Based on Silicon Carbide

Physico-chemical characterisation of selective TiO2 layer on kaolin-based ceramic membranes

The Diatomite Grinding Technology Concept for the Protection of Diatomite Shells and the Control of Product Grading

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