Obtaining Biogenic Silica from Sugarcane Bagasse and Leaf Ash

Besides mineral sources, silica can be found in plants, particularly in the epidermis, since during their growth plants absorb the mono-silicic acid present in the soil, storing it as a natural form of protection, insect pest control and transpiration regulator. Among the plants that present high le...

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Bibliographic Details
Published in:Waste and biomass valorization 2021-06, Vol.12 (6), p.3205-3221
Main Authors: Bortolotto Teixeira, Luyza, Guzi de Moraes, Elisângela, Paolinelli Shinhe, Giovanna, Falk, Gilberto, Novaes de Oliveira, Antonio Pedro
Format: Article
Language:English
Subjects:
Acidic soils
Ashes
Bagasse
Biofuels
Chemical treatment
Electric power
Engineering
Environment
Environmental Engineering/Biotechnology
Epidermis
Ethanol
Hydrochloric acid
Industrial Pollution Prevention
Insects
Leaves
Molecular sieves
Nanoparticles
Original Paper
Pest control
Pharmaceutical industry
Porous silicon
Refractory materials
Renewable and Green Energy
Silica
Silica glass
Silicic acid
Silicon dioxide
Sugarcane
Sustainable development
Transpiration
Waste Management/Waste Technology
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Summary:Besides mineral sources, silica can be found in plants, particularly in the epidermis, since during their growth plants absorb the mono-silicic acid present in the soil, storing it as a natural form of protection, insect pest control and transpiration regulator. Among the plants that present high levels of silica in their ashes, we can highlight sugarcane, with Brazil being the largest producer of sugarcane derived (sugar and bioethanol) in the world, accounting 615 million tons per year. Thus, the increasing of the international demand encourages an increase of the availability of sugarcane wastes, pushing its use for the generation of electric power, as for other purposes enabling a sustainable development. In this work, high purity silica nanoparticles (up to 95%) with predominantly amorphous microstructure were obtained after thermal (500 to 700 °C) and chemical treatments (1 molar hydrochloric acid solution, 10% volume) of sugarcane bagasse and leaves ashes. The obtained results indicate the possibility of using this silica in ceramics, glasses, refractory materials and construction applications, as well as in the cosmetic and pharmaceutical industry, molecular sieves and mesoporous membranes. The silica obtained in this research also proved to be suitable for obtaining porous silicon (using magnesiothermic reduction), where the experimental procedure employed is described elsewhere. Graphic Abstract
ISSN:1877-2641
1877-265X
DOI:10.1007/s12649-020-01230-y