Characterization of Rice Husk via Atomic Absorption Spectrophotometer for Optimal Silica Production

Olawale, O. and Oyawale, F.A. Characterization of Rice Husk via Atomic Absorption Spectrophotometer for Optimal Silica Production. International Journal of Science and Technology.

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Abstract

Rice husk is one of the main agricultural wastes in milling processes that is abundantly available in Nigeria. The aim of this research work is characterization of local rice husk and its objective is determination of its chemical constituents using Atomic Absorption Spectrophotometer. Rice husk from two methods were subjected to calcination for temperature range of 50-7500 C to determine its characterisation temperature. Characterisation temperature was determined via the temperature at which the highest Specific Surface Area (SSA) and highest amount of silica were observed which was 7000 C. Parameters characterized are:Na2O, K 2O,Fe2O3,MnO,CaO,LOI and Specific Surface Area. The results showed that the optimal temperature and maximum amount of silica was 7000 C with highest specific surface area. It was also noted that at 7500 C, there was decrease in the amount of silica obtained. It was concluded that optimal silica was produced at characterisation temperature of 7000 C. This will also reduce the environmental pollution caused by opening burning of rice husk

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