Pramuji, Faiq Hawaari Ahmad (2026) Sintesis Pupuk Cair Ammonium Silikat Dari Abu Sekam Padi. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
This study aims to synthesize liquid ammonium silicate fertilizer ((NH4)2SiO3) from rice husk ash and to determine the effects of varying ammonium hydroxide (NH4OH) concentration and reaction temperature on the resulting silica (Si) and nitrogen (N) content. Rice husk ash is used as a silica source because it contains up to 82% SiO2. The research process includes three main stages: raw material preparation; silica extraction using 10% NaOH at 80°C for 120 minutes; and a synthesis reaction between the extracted silica and an NH4OH solution (5–25%) at 30–110°C for 60 minutes. Silica content analysis was carried out using UV-Vis spectrophotometry, while nitrogen content was analyzed using the Kjeldahl method. The results showed that increasing NH4OH concentration and reaction temperature significantly increased silica content, while increasing temperature tended to decrease nitrogen content due to ammonia volatility. The best conditions were obtained at a NH4OH concentration of 25%, a reaction temperature of 70°C, a silica content of 5.2701%, and a nitrogen content of 17.1637%. The results meet the SNI 02-6681-2002 standard for liquid macro compound fertilizers, which requires a minimum content of 4% for silica and nitrogen. Thus, rice husk ash has great potential as an alternative raw material for the manufacture of environmentally friendly ammonium silicate liquid fertilizers.
| 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: | Faiq Pramuji | ||||||||||||
| Date Deposited: | 02 Mar 2026 02:19 | ||||||||||||
| Last Modified: | 02 Mar 2026 02:19 | ||||||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/49936 |
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