Title of article :
Rice Bran as a Sorbent for Malonic Acid From Aqueous Solution
Author/Authors :
Samadani Langeroodi, Narges Chemistry Department - Science Faculty - Golestan University, Gorgan , Jodaian, Vida Chemistry Department - Science Faculty - Islamshahr branch, Islamic azad university , Mehrani. Sepideh Chemistry Department - Science Faculty - Golestan University, Gorgan
Abstract :
The adsorption of malonic acid on the rice bran was studied under various conditions such as temperature, contact time, adsorbent dose and concentration of adsorbate. Batch adsorption experiments were conducted and the result showed that the adsorption was dependent on all these parameters. The adsorption process obeys the Langmuir and Freundlich adsorption isotherms. The adsorption capacity was found to be 1.24 mg/g. The Sorption of malonic acid on the rice bran was rapid during the first 20 minutes and the equilibrium was found to be attained within 50 minutes. Negative values of Gibbُ s free energy change (ΔG°), show that the adsorption was feasible and spontaneous and negative values of enthalpy change (ΔH°), confirm exothermic adsorption. Adsorption of malonic acid on the rice bran was characterized by Fourier transform infrared (FT-IR) spectroscopy.
Keywords :
rice bran , Adsorption isotherms , Thermodynamics , Kinetics , FT-IR
