Valorization of sugarcane by-products through synthesis of biogenic amorphous silica microspheres for sustainable cosmetics

Joana R. Costa*, Ana Paula Capeto, Carla F. Pereira, Sílvia S. Pedrosa, Inês F. Mota, João da Silva Burgal, Ana I. Pintado, Manuela E. Pintado, Catarina S. S. Oliveira, Patrícia Costa, Ana Raquel Madureira

*Autor correspondente para este trabalho

Resultado de pesquisarevisão de pares

5 Citações (Scopus)
34 Transferências (Pure)

Resumo

Ashes from sugarcane by-product incineration were used to synthesize silica powders through alkaline hot extraction, followed by ethanol/acid precipitation or the sol–gel method. Both production methods allowed amorphous spherical silica microparticles with sizes ranging from 1–15 μm and 97% purity to be obtained. Water absorption ranged from 135–155 mL/100 g and 150–250 mL/100 g for precipitated silica and silica gel, respectively, while oil absorption ranged from 305 to 390 and from 250 to 350 mL/100 g. The precipitation with ethanol allowed the recovery of 178 g silica/kg ash, with a lab process cost of EUR 28.95/kg, while the sol-gel process showed a yield of 198 g silica/kg ash with a cost of EUR 10.89/kg. The experimental data suggest that ash from sugarcane by-products is a promising source to be converted into a competitive value-added product, minimizing the environmental impact of disposal problems.

Idioma originalEnglish
Número do artigo4201
Número de páginas13
RevistaNanomaterials
Volume12
Número de emissão23
DOIs
Estado da publicaçãoPublicado - dez. 2022

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