Open AccessExtraction of high purity amorphous silica from rice husk by chemical process
Author(s) -
Sami A. Ajeel,
Khalid A. Sukkar,
Naser Korde Zedin
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/881/1/012096
Subject(s) - husk , amorphous solid , materials science , leaching (pedology) , amorphous silica , extraction (chemistry) , nuclear chemistry , mineralogy , chemical engineering , chemistry , chromatography , crystallography , soil water , biology , soil science , engineering , botany , environmental science
High purity amorphous silica (SiO 2 ) is extracted from agriculture waste (rice husk) that supplied from Al-Najaf province, Iraq. Silica is the major inorganic constituent of the rice husk. It is prepared with using acid pretreatment of (3N HCl), then burned it at (700°C) for 4 hrs, and followed with leaching process by 1.5, 2, 2.5, and 3N NaOH. The extracted results are high-surface area of amorphous silica particles. Extracted results are silica particles were high surface area of amorphous silica particles. These particles were characterized by X-Ray diffraction (XRD), and X-Ray Fluorescence (XRF) and Atomic force microscopy (AFM) techniques. High pure amorphous silica observed from rice husk ash was confirmed by XRD diffraction. The silica purity results measured by X-Ray fluorescence was 99.714% for leaching at 3N NaOH. Results from (AFM) of silica with nanoscale sizes and microparticles with diameters ranging from (87-114) nm.