Open AccessEvaluation of acid leaching process and calcination temperature on the silica extraction efficiency from the sustainable sources
Author(s) -
Sami A. Ajeel,
Khalid A. Sukkar,
Naser Korde Zedin
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1773/1/012014
Subject(s) - calcination , thermogravimetric analysis , leaching (pedology) , scanning electron microscope , husk , materials science , amorphous solid , nuclear chemistry , extraction (chemistry) , chemical engineering , chemistry , catalysis , chromatography , composite material , organic chemistry , soil water , environmental science , soil science , engineering , botany , biology
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.