Siahaan, Sri Damai Yanti Siahaan (2025) LAPORAN HASIL PENELITIAN PEMBUATAN PUPUK KALIUM SILIKA PADAT BERBAHAN FLY ASH BATU BARA DENGAN METODE EKSTRAKSI DAN KALSINASI. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Fly ash is a by-product of coal combustion that contains large amounts of silica. This content provides the potential for fly ash to be used in the production of silica-based fertilizers, especially potassium silica fertilizers. This fertilizer has important benefits in increasing plant resistance to environmental stress and increasing nutrient absorption. Therefore, this study aims to determine the optimal conditions for the synthesis of potassium silica fertilizers through variations in KOH concentration and extraction time. The research methods used include silica extraction from fly ash with KOH at concentrations of 7, 9, 11, 13, and 15 N, as well as variations in extraction time for 60, 90, 120, 150, and 180 minutes. After the extraction process, the filtrate was dried at 100°C for one hour in an oven. Furthermore, the results obtained were calcined at 800°C for one hour to produce the final product. After the calcination process, XRF (X-ray Fluorescence) analysis was carried out to determine the percentage of silica and potassium content in the fertilizer. The results showed that increasing KOH concentration was directly proportional to silica recovery, but conversely decreased potassium retention. Similar things happened to the length of extraction time, where the longer the extraction process took place, the more silica was obtained, but with a reduction in potassium levels in the final product. From the various conditions tested, the optimal conditions were obtained at a KOH concentration of 15 N with an extraction time of 120 minutes, producing 57.5% silica and 39.4% potassium. The potassium silica fertilizer from this study has a quality comparable to commercial silica fertilizers that have been circulating in the market. This is indicated by the potassium and silica content produced in the range of 30-55% for potassium and 40-60% for silica. Thus, this fertilizer can be an alternative silica-based fertilizer that is worthy of use in modern agriculture.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TP Chemical technology T Technology > TP Chemical technology > TP155 Chemical engineering |
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| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | sri damai yanti siahaan | ||||||||
| Date Deposited: | 23 Jun 2025 04:35 | ||||||||
| Last Modified: | 23 Jun 2025 04:35 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/38991 |
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