| Title |
Valorization of Sugarcane By-Products through Synthesis of Biogenic Amorphous Silica Microspheres for Sustainable Cosmetics |
| ID_Doc |
24903 |
| Authors |
Costa, JR; Capeto, AP; Pereira, CF; Pedrosa, SS; Mota, IF; Burgal, JD; Pintado, AI; Pintado, ME; Oliveira, CSS; Costa, P; Madureira, AR |
| Title |
Valorization of Sugarcane By-Products through Synthesis of Biogenic Amorphous Silica Microspheres for Sustainable Cosmetics |
| Year |
2022 |
| Published |
Nanomaterials, 12, 23 |
| Abstract |
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 mu m 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. |
| PDF |
https://www.mdpi.com/2079-4991/12/23/4201/pdf?version=1669445486
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