Removal of Ni²⁺ from aqueous solution by rice bran
by Xue-Song Wang, Yong Qin
International Journal of Environment and Pollution (IJEP), Vol. 34, No. 1/2/3/4, 2008

Abstract: Rice bran, an agricultural by-product, was used for the sorptive removal of Ni²⁺ from aqueous solutions. Batch adsorption experiments were performed as a function of initial concentrations, contact time, pH and temperature. The experimental data were analysed by Langmuir, Freundlich and Redlich-Peterson isotherms. The equilibrium sorption capacity of Ni²⁺ was determined from the Langmuir equation and was found to be 28.36 mg/g. The sorption process follows pseudo-second-order kinetics. The thermodynamic parameters, such as ΔG and ΔS, have been calculated. The thermodynamics of Ni²⁺/rice bran system indicates the spontaneous nature of the process.

Online publication date: Thu, 16-Oct-2008

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