ABSTRACT:The removal of toxic metal ions (iron and manganese) from aqueous solution by adsorption was studied. The batch process was used either to remove each metal ion singly or both metals as a multi-component system. The adsorbents used were low-cost materials, viz. palm fruit bunch and maize cob. The adsorption isotherms demonstrated that the adsorbents behaved in a favourable manner towards metal ion adsorption. The adsorption capacities for iron ions on palm fruit bunch and maize cob were in the 57-80% range and for the manganese ion in the 50-79% range for initial concentrations between 1 ppm and 10 ppm. With mixtures of both metal ions, removal of iron ions from the mixture was in the 54-79% range and for the manganese ion in the 54-76% range. The extended Langmuir model gave poor agreement with the data for the adsorption of mixtures of the two metal ions while the P-factor model yielded good agreement.

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Removal of toxic metals (iron and manganese) ions from aqueous solution by adsorption was studied. Batch tests were used to study the removal of each metal either as a single component or both metals as multicomponent. The adsorbents used are low cost materials namely; palm fruit bunch and maize cobs. The adsorption isotherms proved the favor ability of the adsorbent used. Removal of iron ion by adsorption on palm fruit bunch and maize cobs was in the range of 80-57%, and for magnesium ion in the range of 79-50% for initial concentration ranged between 1 and 10 ppm. In case of mixture of both metals, removal of iron from the mixture was in the range 79-54% and for magnesium was in range of 76-54%.