Green recovery of amorphous silica from silicone waste: Alkali activation and thermal treatment
This study presents a green and sustainable method for recovering high-purity silica from solid silicone by-products derived from industrial silicone oil manufacturing through alkali-assisted sol–gel synthesis, with and without thermal treatment. Sodium hydroxide and sodium carbonate were used to evaluate the effects of alkali type, concentration, and calcination at 800 °C on silica yield, structure, and performance.