Riesnawa, Yurdien Dellan (2026) Sintesis Dan Karakterisasi ZSM-5 Mesopori dari Silika Hasil Ekstraksi Lumpur Lapindo Dengan Variasi Konsentrasi NaOH dan Waktu Presipitasi. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
The Lapindo mudflow in Sidoarjo, East Java, has not only caused significant environmental impacts but also presents substantial potential as a source of valuable minerals, particularly silica. Lapindo mud is known to contain a high concentration of SiO₂; however, the presence of impurities such as Fe₂O₃, CaO, and Al₂O₃ limits its optimal utilization. Previous studies indicate that acid leaching methods are less effective in improving silica purity, whereas alkaline extraction, especially using NaOH solutions, demonstrates higher efficiency in dissolving silica and producing higher-purity products. Therefore, an appropriate extraction approach is required to maximize the utilization of Lapindo mud as an economical and environmentally friendly alternative silica source. This study aims to investigate the effect of NaOH concentration and precipitation time on the silica yield extracted from Lapindo mud, as well as its application as a silica source in the synthesis of mesoporous ZSM-5. The results show that increasing NaOH concentration and extending precipitation time significantly enhance silica yield, with the highest yield of 57.78% obtained at a NaOH concentration of 10 M and a precipitation time of 5 days. The synthesized ZSM-5 derived from Lapindo silica successfully exhibits the characteristic MFI structure, as indicated by XRD peaks at 2θ ranges of 7–9° and 23–25°. Additionally, the material demonstrates mesoporous properties with pore sizes ranging from 2–50 nm and a surface area exceeding 250 m²/g.These findings suggest that silica extracted from Lapindo mud has strong potential as an effective alternative raw material for the synthesis of mesoporous ZSM-5 catalysts.
| 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: | Yurdien Dellan Riesnawa | ||||||||
| Date Deposited: | 29 May 2026 03:19 | ||||||||
| Last Modified: | 29 May 2026 03:19 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/52677 |
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