Abstract
A novel biosorbent, derived from dried peels of lime (Citrus aurantifolia ) was used for the removal of Cu (II) ions from aqueous solutions. The effects of pH, biosorbent dosage and temperature on the biosorption of Cu (II) ions were investigated in batch mode. At optimal conditions, with pH 5, 0.4 g/L of biosorbent dosage, 100 mg/L of initial Cu (II) concentration and temperature 80 ⁰C, the maximum biosorption capacity obtained was 100 mg/g. Equilibrium data was best described by both the Langmuir and Freundlich model, indicating the involvement of more than one mechanism for the sorption process. Thermodynamic studies revealed that the biosorption process is favorable, spontaneous and endothermic in nature. The outcome of this study revealed that dried lime peel powder has good potential to be used as a low cost and environmentally friendly biosorbent for the removal of Cu (II) ions from aqueous solutions.
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