Kinetics study of Si release from silica synthesized from sugarcane waste ash
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2024
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CONGRESSO INTERNACIONAL DE SUSTENTABILIDADE, 5.
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Sugarcane bottom ash (SWA) is a byproduct generated in substantial quantities globally,
creating significant environmental challenges due to inadequate disposal practices. This study
focused on the extraction of high-purity silica from SWA using the sol-gel method, a process
known for its efficiency in producing high-quality materials. Advanced characterization
techniques, including X-ray fluorescence (XRF) and X-ray diffraction (XRD), confirmed the
successful production of amorphous silica with a purity of 98%, demonstrating the
effectiveness of this method. To further evaluate the Si content, the synthesized product
underwent chemical treatment using a combination of citric acid, hydrochloric acid, and a salt
mixture for a period of 48 h. This critical step improved the properties of the material and
prepared it for further analysis. Kinetic parameters were determined to characterize the silicon
release behavior under various conditions, providing valuable information on the potential of
the material as a slow-release fertilizer. Four mathematical models—first-order equation, power
function, parabolic diffusion, and Elovich model—were employed to describe the kinetics of
Si release, providing insights into the product’s agricultural applications. The findings suggest
that silica synthesized from SWA is not only a sustainable alternative to conventional fertilizers
but also supports circular economy principles by transforming waste into valuable resources.
Furthermore, this innovation aligns with the Sustainable Development Goals (SDGs) related to
responsible consumption, production, and sustainable agriculture. By addressing environmental
and agricultural challenges, this research highlights the dual benefits of waste management and
resource efficiency. It demonstrates the role of innovative waste valorization strategies in
promoting sustainability across industries and unlocking broader applications in the
environmental and agricultural sectors, ultimately demonstrating the potential of SWA as a key
resource in sustainable development.
Como referenciar
SANTOS, BARBARA J. dos; ULRICH, JOAO C.; FUNGARO, DENISE A. Kinetics study of Si release from silica synthesized from sugarcane waste ash. In: CONGRESSO INTERNACIONAL DE SUSTENTABILIDADE, 5., 2-5 de setembro, 2024, On-line. Anais... Fortaleza, CE: Editora Integrar, 2024. DOI: 10.51189/coninters2024/50363. Disponível em: https://repositorio.ipen.br/handle/123456789/49155. Acesso em: 20 Jan 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.