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Preparation and Characterization of Egyptian Rice Husk Ash |
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PP: 25-36 |
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doi:10.18576/wefe/030103
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Author(s) |
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Azza I.H,
Maaly M.A.Khedr,
Rania M. Sabry,
Randa M.O,
Hanaa M.Ali,
Islam M.I.,
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Abstract |
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| Solid waste utilization and cost reduction in industrial processing has attracted the use of Egyptian Rice Husk (RH) as added value materials. Rice Husk Ash (RHA) has been found suitable for wide range of domestic and industrial applications. The present paper highlighted and discussed preparation and characterization of burning RH (rice husk) and LRH (leached rice husk) respectively in muffle furnace, at 10 ºC rate of heating, in presence of air flow for different temperatures (450 -700 ºC) and time (1 – 3 hours). Leaching is carried out by using different inorganic and organic acids, i.e., hydrochloric acid (HCl), sulfuric acid (H2SO4), nitric acid (HNO3) and acetic acid (CH3COOH) of different concentrations (0.1N - 4.0N). X-ray fluorescence (XRF) is used to determine the chemical composition of RH, CRH and CLRH and X-ray diffraction (XRD) is used to identify the amorphous silica in RH and both calcined RH. The structure and morphology of silica content was tested by electron scanning microscopy (SEM). Amorphous silica was obtained in the range of 450 - 600 ºC High amorphous silica content of 92% and 95.6% were achieved for CRH at 500 ºC after 2 hours and for CLRH at 550 ºC after 3hours respectively. The investigation of adsorption capacity for the native RH, CRH, and CLRH at pH 11 were found to be 90.9, 98.16 and 96.29 mg/g respectively. |
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