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Use of silicate by-products in water treatment processes and development of eco-friendly self-polishing antifouling coatings

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Abstract

The production waste involvement in processing and recycling—one of the urgent tasks in the development of environmentally oriented and resource-saving technologies. In this work, two types of silicate-containing materials of plant (silicon dioxide from rice husk) and technogenic (calcium hydrosilicate) origin are studied as sorbents for removal of heterotrophic bacteria from water and as fillers for eco-friendly marine antifouling coatings. Characterizations (morphology, chemical composition, specific surface area, zeta-potential), bacterial adsorption performance and prepared samples efficiency in antifouling coating were investigated. The results showed that the sample of calcium hydrosilicate obtained from technogenic raw materials has a macroporous needle-like structure and characterized by high removal efficiency to Escherichia coli and Bacillus subtilis in 0,05 M NaCl. Sample of biogenic silicon dioxide characterized by globular micromorphology with high value of specific surface area. Incorporation of inorganic filler particles of biogenic and technogenic samples in the coating enhanced the paint hardness. Improved antifouling performance was shown for coatings with SiO2 from rice husk coupled with bacterial antifouling extract during 9 months of field test.

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Acknowledgements

The XRD, FT-IR techniques, N2 adsorption and zeta potential data used in this research were obtained through Far Eastern Center of Structural Analysis (FESCA) at the Institute of Chemistry FEB RAS (Vladivostok, Russian Federation). The authors wish to thank colleagues from FESCA and the Russian-Vietnamese Tropical Research and Technology Center in Nha Trang (Vietnam) for invaluable assistance during field experiments.

Funding

The work was financially supported by the RFBR, project number 19-29-13020.

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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by UK, LZ, SY and IB. The first draft of the manuscript was written by UK and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to U. Kharchenko.

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The authors of this paper declare there were no conflicts of interest during its work and preparation.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Editorial responsibility: Maryam Shabani.

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Kharchenko, U., Zemnukhova, L., Yarusova, S. et al. Use of silicate by-products in water treatment processes and development of eco-friendly self-polishing antifouling coatings. Int. J. Environ. Sci. Technol. 19, 5945–5956 (2022). https://doi.org/10.1007/s13762-021-03557-y

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  • DOI: https://doi.org/10.1007/s13762-021-03557-y

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