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Evaluation of Acid Leaching Process and Calcination Temperature on the Silica Extraction Efficiency from the Sustainable Sources by Sami Abualnoun Ajeel; Khalid A. Sukkar; Naser Korde Zedin is a Physics and Astronomy article available to read on EtoBox.

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## Abstract In the present work, amorphous silica (SiO~2~) is prepared from agricultural waste (rice husks) as a sustainable source by acid leaching process followed with the calcination process. RH treated with 3N HCl, then burned at (500, 600, 700, and 800°C) for 4 hrs. The final product of silica was characterized by X-ray fluorescence (XRF), scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, and thermogravimetric analysis (TGA). The results by XRD and XRF indicate that the obtained white powder was amorphous silica at calcination temperature less than 700°C with a purity of 96.976% but at 800°C the purity was 96.983%. SEM and visual inspection analyses show that RHA morphologies with acid pre-treatment at 700°C and 800°C surfaces of un-leached rice husk have a greater degree of roughness than those that have been leached with dilute acids.

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Author

Sami Abualnoun Ajeel; Khalid A. Sukkar; Naser Korde Zedin

Publisher

IOP Publishing

Published

2021

Language

EN

Field

Physics and Astronomy (Physical Sciences)