Synthesis of Ammonium Silicate Liquid Fertilizer from Rice Husk Ash
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This study aims to synthesise liquid ammonium silicate fertiliser ((NH?)?SiO?) from rice husk ash and to determine the effects of varying ammonium hydroxide (NH?OH) 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 high levels of SiO?, up to 82%. 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 NH?OH 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 NH?OH 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 NH?OH 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.
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SDG 2: Zero Hunger
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SDG 13: Climate Action
[1] S. Sujianto et al., “Drivers of Organic Rice Adoption Among Smallholder Farmers: Implications for Sustainable Development.,” Int. J. Sustain. Dev. Plan., vol. 19, no. 1, 2024.
[2] D. Zebua and K. Sinulingga, “Pengaruh Penambahan Abu Sekam Padi Sebagai Campuran Terhadap Kekuatan Batubata,” J. Einstein, vol. 6, no. 02, pp. 8–13, 2018.
[3] C. C. Ma, Q. F. Li, Y. B. Gao, and T. R. Xin, “Effects of silicon application on drought resistance of cucumber plants,” Soil Sci. Plant Nutr., vol. 50, no. 5, pp. 623–632, 2004.
[4] C. P. Nahrisah, M. Hidayat, and E. N. Taib, “Pemanfaatan Limbah Kulit Singkong Menjadi Pupuk Organik Cair Terhadap Pertumbuhan Tanaman Sawi,” in Prosiding Seminar Nasional Biologi, Teknologi dan Kependidikan, 2020.
[5] A. Bhardwaj, S. K. S. Hossain, and M. R. Majhi, “Preparation and characterization of clay bonded high strength silica refractory by utilizing agriculture waste,” boletín la Soc. española cerámica y Vidr., vol. 56, no. 6, pp. 256–262, 2017.
[6] D. R. Mujiyanti, D. Ariyani, and N. Paujiah, “Kajian Variasi Konsentrasi Naoh Dalam Ekstraksi Silika Dari Limbah Sekam Padi Banjar Jenis ‘Pandak,’” 2021.
[7] K. N. Wahyusi, A. Nandini, L. I. Utami, I. Utami, N. Mardhiyah, and D. Nofita, “The Effect of Resin and NH4OH Addition in The Making of Ammonium Silica Fertilizer from Geothermal Sludge,” Int. J. Eco-Innovation Sci. Eng., vol. 2, no. 1, 2021.
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