Rahmawati, Belinda Tri Setya (2025) Pemanfaatan Limbah Kaca dalam Pembuatan Silika Gel Menggunakan Natrium Hidroksida (NaOH) dengan Metode Sol Gel. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Glass waste can be recycled as an alternative material source in silica gel synthesis using the sol-gel method to produce high-quality products and reduce inorganic waste. Silica is extracted from glass waste using sodium hydroxide (NaOH), then converted into sodium silicate. Silica gel synthesis was carried out by varying two main variables, namely the sodium silicate:water dilution ratio (1:1, 1:2, 1:3, 1:4, and 1:5) and sulfuric acid concentration (1.5 M; 2 M; 2.5 M; 3 M; and 3.5 M). Product characterization was performed using XRF for SiO₂ content, XRD for amorphous structure, and BET for specific surface area. The highest SiO₂ content of 86.83% was obtained at a ratio of 1:5 and a concentration of 3.5 M H₂SO₄. Meanwhile, the highest specific surface area of 186.82 m²/g was achieved at the same ratio, namely 1:5 and a concentration of 3 M. With optimization using the Response Surface Methodology (RSM), the theoretical optimum conditions were obtained at a sodium silicate:water dilution ratio of 1:10 and an H₂SO₄ concentration of 7.27 M, resulting in SiO₂ purity of up to 99%. These results indicate the high potential of glass waste as an alternative source of silica for catalyst applications. Keywords: glass waste, sol-gel, sodium silicate, silica gel.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TP Chemical technology > TP155 Chemical engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | Belinda Tri Setya Rahmawati | ||||||||
| Date Deposited: | 04 Nov 2025 05:10 | ||||||||
| Last Modified: | 04 Nov 2025 05:11 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/46092 |
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