Study of the Composition and Properties of Bivalve Mollusk Shells as Promising Bio-Indifferent Materials for Photocatalytic Applications (Example of Practical Use)
This paper studies the composition and properties of shells of bivalve mollusks (<i>Crenomytilus grayanus, Callista brevisiphonata,</i> and <i>Mizuhopecten yessoensis</i>) from coastal discharges with a view to the possibility of their use in photocatalytic water treatment sy...
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MDPI AG
2023-12-01
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| Online Access: | https://www.mdpi.com/2073-4344/14/1/16 |
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| author | Aleksey V. Zaitsev Ivan A. Astapov |
| author_facet | Aleksey V. Zaitsev Ivan A. Astapov |
| author_sort | Aleksey V. Zaitsev |
| collection | DOAJ |
| description | This paper studies the composition and properties of shells of bivalve mollusks (<i>Crenomytilus grayanus, Callista brevisiphonata,</i> and <i>Mizuhopecten yessoensis</i>) from coastal discharges with a view to the possibility of their use in photocatalytic water treatment systems. The clam shells are considered in terms of application in the form of a powder material as a precursor for creating photocatalysts, and also as a carrier of photocatalytic coatings. It was shown that the main phase composing the shell material was calcium carbonate in two crystallographic modifications—calcite and aragonite. The presence of inorganic impurities in all studied clam shells did not exceed one mass percent. The main share was made up of elements included in the composition of calcium carbonate, which confirmed the high bio-indifference of the materials under study. Depending on the physiological and environmental features of the structure of clam shells, different contents of the organic component in their composition were observed. The granulometric characteristics of crushed clam shells (average diameter, specific surface area, and distribution modality) were studied. It was shown that the maximum values of bending strength of 5 MPa and compressive strength of 2 MPa are characterized by <i>Mizuhopecten yessoensis</i> shells with the lowest porosity of 2.91%. The features of sorption and photosorption processes of both whole and crushed shells in relation to four organic dyes at different temperatures and degrees of illumination were studied. Based on crushed shells of <i>Mizuhopecten Yessoensis</i> and titanium dioxide, functional materials (Ca<sub>x</sub>Ti<sub>y</sub>O<sub>z</sub>) were obtained, and their morphology and photocatalytic properties were studied. An example of the practical use of clam shells as a carrier of a photocatalytic coating is given. |
| first_indexed | 2024-03-08T11:02:01Z |
| format | Article |
| id | doaj.art-45544f13ba1949f990cbde5ac2755f98 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-08T11:02:01Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-45544f13ba1949f990cbde5ac2755f982024-01-26T15:39:35ZengMDPI AGCatalysts2073-43442023-12-011411610.3390/catal14010016Study of the Composition and Properties of Bivalve Mollusk Shells as Promising Bio-Indifferent Materials for Photocatalytic Applications (Example of Practical Use)Aleksey V. Zaitsev0Ivan A. Astapov1Institute of Water and Ecology Problems FEB RAS, Khabarovsk 680000, RussiaInstitute of Tectonics and Geophysics FEB RAS, Khabarovsk 680000, RussiaThis paper studies the composition and properties of shells of bivalve mollusks (<i>Crenomytilus grayanus, Callista brevisiphonata,</i> and <i>Mizuhopecten yessoensis</i>) from coastal discharges with a view to the possibility of their use in photocatalytic water treatment systems. The clam shells are considered in terms of application in the form of a powder material as a precursor for creating photocatalysts, and also as a carrier of photocatalytic coatings. It was shown that the main phase composing the shell material was calcium carbonate in two crystallographic modifications—calcite and aragonite. The presence of inorganic impurities in all studied clam shells did not exceed one mass percent. The main share was made up of elements included in the composition of calcium carbonate, which confirmed the high bio-indifference of the materials under study. Depending on the physiological and environmental features of the structure of clam shells, different contents of the organic component in their composition were observed. The granulometric characteristics of crushed clam shells (average diameter, specific surface area, and distribution modality) were studied. It was shown that the maximum values of bending strength of 5 MPa and compressive strength of 2 MPa are characterized by <i>Mizuhopecten yessoensis</i> shells with the lowest porosity of 2.91%. The features of sorption and photosorption processes of both whole and crushed shells in relation to four organic dyes at different temperatures and degrees of illumination were studied. Based on crushed shells of <i>Mizuhopecten Yessoensis</i> and titanium dioxide, functional materials (Ca<sub>x</sub>Ti<sub>y</sub>O<sub>z</sub>) were obtained, and their morphology and photocatalytic properties were studied. An example of the practical use of clam shells as a carrier of a photocatalytic coating is given.https://www.mdpi.com/2073-4344/14/1/16clam shellphotocatalytic water treatmentbio-indifferent carriersorganic dyesfunctional properties |
| spellingShingle | Aleksey V. Zaitsev Ivan A. Astapov Study of the Composition and Properties of Bivalve Mollusk Shells as Promising Bio-Indifferent Materials for Photocatalytic Applications (Example of Practical Use) Catalysts clam shell photocatalytic water treatment bio-indifferent carriers organic dyes functional properties |
| title | Study of the Composition and Properties of Bivalve Mollusk Shells as Promising Bio-Indifferent Materials for Photocatalytic Applications (Example of Practical Use) |
| title_full | Study of the Composition and Properties of Bivalve Mollusk Shells as Promising Bio-Indifferent Materials for Photocatalytic Applications (Example of Practical Use) |
| title_fullStr | Study of the Composition and Properties of Bivalve Mollusk Shells as Promising Bio-Indifferent Materials for Photocatalytic Applications (Example of Practical Use) |
| title_full_unstemmed | Study of the Composition and Properties of Bivalve Mollusk Shells as Promising Bio-Indifferent Materials for Photocatalytic Applications (Example of Practical Use) |
| title_short | Study of the Composition and Properties of Bivalve Mollusk Shells as Promising Bio-Indifferent Materials for Photocatalytic Applications (Example of Practical Use) |
| title_sort | study of the composition and properties of bivalve mollusk shells as promising bio indifferent materials for photocatalytic applications example of practical use |
| topic | clam shell photocatalytic water treatment bio-indifferent carriers organic dyes functional properties |
| url | https://www.mdpi.com/2073-4344/14/1/16 |
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