Spectroscopic Studies of Different Kind of Rice Husk Samples Grown in North of Iran and the Extracted Silica by Using XRD, XRF, IR, AA and NMR Techniques
Keywords:
Rice husk; rice husk ash; microwave heating; SEM; XRD; XRF; NMRAbstract
In this study rice husk ashes (RHAs) werte obtained from different rice growing in the
North of Iran. X-ray diffraction (XRD) and X-ray fluorescence (XRF) spectrometry and IR were
applied for determination of crystallinity and analysis of mineral content and chemical bonding
in extracted silica respectively. Our results showed that concentration of silica in Fajr rice husk
is higher compared to other kind of rice husk samples. The effect of calcinations at different
temperatures 600, 700, 800 and 900 C on extracted silica was also considered. In the
process of silica extraction, increasing the temperature led to great porous volume in silica
network.