Use of Raw Rice Husk for Removal of Crude Oil from Aqueous Environments

Document Type : Research Article


1 Department of Natural Resources, Isfahan University of Technology, 8415683111 Isfahan, I.R. IRAN

2 Department of Chemistry, Isfahan University of Technology, 8415683111 Isfahan, I.R. IRAN


In the present study, the raw rice husk was used as adsorbent for removal of crude oil from aqueous solution. The sorbent was characterized by CHNS analyzer, ICP-OES spectroscopy, Fourier Transform InfraRed (FT-IR) and Scanning Electron Microscopy (SEM).The oil adsorption percent was determined by weighting method. The effect of various parameters including contact time, particle size, initial oil concentration, adsorbent dose on adsorption were investigated. The results showed that the adsorption kinetics was rapid and the kinetics data for oil sorption were precisely described by the pseudo-second order model. The decrease of particle size of the raw rice hulls reduced the oil sorption percent from 50% to 30%. Also, the adsorption of crude oil on rice hull obeyed the Freundlich isotherm model.The highest adsorption percentage of crude oil on the raw rice hull at optimized conditions was about 55%.


Main Subjects

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