MULTI-COMPONENT ADSORPTION OF HEAVY METAL IONS FROM AQUEOUS SOLUTIONS ONTO LOW COST ADSORBENT BASED ON RICE HUSKS

: A novel low cost adsorbent based on rice husks was obtained by slow pyrolysis at temperature 350°C and was characterized by means of SEM, Hg-porosimetry and N2-adsorption. The adsorption properties of the investigated material towards Fe(III), Pb(II), Cr(III) and Cu(II) ions in multi-component aqueous solutions with different concentrations and acidity were studied in a batch system. The adsorption of metals is significantly affected by the pH value. Equilibrium experimental data were fitted to linear Langmuir and Freundlich model and maximum adsorption capacities were calculated . Kinetic of adsorption in multi-component solutions was also investigated.

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