Production of Magnesium Silicate from Rice Husk with Variation of NaOH Concentration and Reaction Time Length Using Sol-gel Method

Sultan Hendra Mahardi Kalloka, Sulthan Rabbani, Zel Andesra, Lailatul Qomariyah

Abstract


Rice husk is a by-product of rice production where as much as 9.9 million tons become organic waste. Rice husk ash, which is rich in silica, can be processed into materials that have high selling value. Magnesium silicate is one of the silica-based composite materials with the chemical formula MgSiO3 with an example of its application as a material in the manufacture of magnesium cement. The manufacture of magnesium silicate is done by sol-gel method with NaOH solvent where this method is relatively easy and uses simple equipment. This study was conducted to know the best NaOH concentration and length of reaction time to produce optimal magnesium silicate. The NaOH concentration variables used were 3 M, 5 M, 7 M, and 9 M, while the variable length of reaction time was 90 minutes and 150 minutes. The best NaOH concentration is 7M with 90 minutes of reaction time. This variable gave 49,9% yield of magnesium silicate compared to 3M with 90 minutes reaction time where it gave 17,4% yield. The analytical tests carried out were FITR where this test was carried out to confirm the formation of magnesium silicate

Keywords


Magnesium silicate; NaOH; Rice husk; Sol-gel

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References


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Agung M, G. F., Hanafie Sy, M. R. and Mardina, P. (2013) ‘Ekstraksi Silika Dari Abu Sekam Padi Dengan Pelarut Koh’, Konversi, 2(1), p. 28. doi: 10.20527/k.v2i1.125.

Aysa-Martínez, Y. et al. (2021) ‘Synthesis of amorphous magnesium silicates with different SiO2:MgO molar ratios at laboratory and pilot plant scales’, Microporous and Mesoporous Materials, 317(February), pp. 0–7. doi: 10.1016/j.micromeso.2021.110946.

Fatriansyah, J. F., Situmorang, F. W. and Dhaneswara, D. (2018) ‘Ekstraksi silika dari sekam padi: metode refluks dengan naoh dengan pengendapan menggunakan asam kuat (hcl) dan asam lemah (CH3COOH)’, Prosiding Seminar Nasional Fisika Universitas Riau ke-3, 5(1), pp. 123–127.

Gel, M. S. H. et al. (2018) ‘Characterization of Magnesium Silicate Hydrate’, pp. 1–15. doi: 10.3390/ma11060909.

Kristy, D. P. and Zainul, R. (2019) ‘Analisis Molekular dan Transpor Ion Natrium Silikat’, Repository UNPAD.

Li, Z. et al. (2014) ‘Characterization of reaction products and reaction process of MgO – SiO2 – H2O system at room temperature Characterization of reaction products and reaction process of MgO – SiO 2 – H 2 O system at room temperature’, (June). doi: 10.1016/j.conbuildmat.2014.03.004.

Li, Z. et al. (2022) ‘Performance of magnesium silicate hydrate cement modified with dipotassium hydrogen phosphate’, Construction and Building Materials, 323(May 2021), p. 126389. doi: 10.1016/j.conbuildmat.2022.126389.

Mujiyanti, D. R., Ariyani, D. and Paujiah, N. (2021) ‘KAJIAN VARIASI KONSENTRASI NaOH DALAM EKSTRAKSI SILIKA DARI LIMBAH SEKAM PADI BANJAR JENIS “PANDAK”’, Jurnal Sains dan Terapan Kimia, 15(2), p. 143. doi: 10.20527/jstk.v15i2.10373.

Sáez, I. F., Martínez-ramírez, S. and Blanco-varela, M. T. (2014) ‘FTIR study of the effect of temperature and nanosilica on the nanostructure of C – S – H gel formed by hydrating tricalcium silicate’, Construction and Building Materials, 52, pp. 314–323. doi: 10.1016/j.conbuildmat.2013.10.056.

Sun, Z. et al. (2018) ‘Preparation of magnesium silicate/carbon composite for adsorption of rhodamine B’, RSC Advances, 8(14), pp. 7873–7882. doi: 10.1039/c7ra12848g.


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