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Producing amorphous white silica from rice husk


Citation

Matori, Khamirul Amin and M.M. , Haslinawati and Abd. Wahab, Zaidan and Abd. Aziz, Sidek and Tan, Kar Ban and Wan Ab. Karim Ghani, Wan Azlina (2009) Producing amorphous white silica from rice husk. MASAUM Journal of Basic and Applied Sciences, 1 (3). pp. 512-515. ISSN 2076-0841

Abstract

The aim of this paper is to investigate the effects of various acid treatments of the rice husk (RH) on removal of its metallic ingredients and determine the percentage of silica and metallic ingredients contained in the RH. Leaching of RH in diluted HCl proved to be effective in substantially removing most of the metallic ingredients. Pre-heat treatment of RH at 500 °C for 1 hour and continue at 800 °C for 2 hours are required for complete combustion of RH to white ash. Ash residues obtained from acid-treated samples were completely white in colours. The acid treatment of RH does not affect the amorphicity of the silica. 5% HF and 5% HNO 3 are used to digest the rice husk ash (RHA). Inductively coupled plasma was used to characterize the percentage of the silica and metallic ingredients contained in the RH.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Publisher: MASAUM Network
Keywords: Digestion; Rice husk; Silica; Leaching
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 02 Aug 2015 07:55
Last Modified: 22 Oct 2015 01:13
URI: http://psasir.upm.edu.my/id/eprint/16353
Statistic Details: View Download Statistic

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