Extraction and Characterization of Bio-Silica from Sri Lankan Traditional Rice Husks and Evaluation to TLC Application

Rice husk (RH) is one of the most abundant agricultural wastes, but can be identified as a useful bio resource. Gonabaru, Kahawanu, Patchaperumal, Dahanala and Suwandel are five immerging traditional rice varieties, competing with genetically improved in Sri Lankan market. Ash content RHs varieties (>20.0%) was comparatively higher than rice. It that additional acid washing step essential to improve purity silica. Mineral impurities such Na, K, Ca, Fe Mn were determined using atomic absorption spectrometer (AAS). High silica extracted from (>23.0%) variety, BW 364 (~16.2%). The functional groups present ash (RHA) (RHS) Fourier transform infrared (FTIR) analysis. potential application purified RHS observed by preparing analyzing thin layer chromatography (TLC) comparison commercial TLC