Betafacreza, Aditya Fadhilaskha (2026) Sintesis Silika Amorf (SIO2) dari Limbah Peleburan Baja dengan Proses Ekstraksi dan Presipitasi Asam. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Steelmaking processes generate large amounts of slag waste that contain silica, which can be recovered and converted into valuable products. In this study, silica (SiO₂) was extracted from steel slag waste through alkaline extraction using sodium hydroxide (NaOH) followed by acid precipitation. The experimental parameters included NaOH concentrations of 0.5, 1.0, 1.5, 2.0, and 2.5 M, and extraction temperatures of 60, 70, 80, 90, and 100 °C. Each extraction was carried out for 60 minutes with continuous stirring at 300 rpm. The X-ray diffraction (XRD) analysis confirmed that the product exhibited a broad peak at 2θ around 20–30°, which is characteristic of amorphous silica. The results indicated that both NaOH concentration and temperature had a positive correlation with silica yield. As the NaOH concentration and extraction temperature increased, the percentage of extracted silica also increased. The optimum condition was achieved at 100 °C and 2.5 M NaOH, yielding silica with a purity of 91.10%. These findings highlight the potential of utilising steel slag waste as a low-cost raw material for producing amorphous silica. Furthermore, the process demonstrates a sustainable approach to waste valorization while providing high-purity silica for potential applications in industrial materials, adsorbents, and nanotechnology.
| 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: | Aditya Fadhilaskha Betafachreza | ||||||||
| Date Deposited: | 02 Mar 2026 03:19 | ||||||||
| Last Modified: | 02 Mar 2026 03:19 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/50026 |
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Sintesis Silika Amorf (SIO2) dari Limbah Peleburan Baja dengan Proses Ekstraksi dan Presipitasi Asam. (deposited UNSPECIFIED)
- Sintesis Silika Amorf (SIO2) dari Limbah Peleburan Baja dengan Proses Ekstraksi dan Presipitasi Asam. (deposited 02 Mar 2026 03:19) [Currently Displayed]
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