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Abstract
Decontamination and adsorption modelling of Co2+ and Pb2+ ions from a model aqueous solution have been studied in batch system using natural tripoli (NT) and bentonite (NB). The adsorption study is controlled by a number of factors such as adsorbent dosage, contact time, initial metal ion concentration, and temperature effect. The adsorption equilibrium is achieved during the first 60 min. The maximum removal 97% (approx.) is obtained at 10 g/L and 20°C. The dynamic isotherm has been successfully modelled by the Langmuir (R 2 = 0.98). The negative thermodynamic parameter ΔG indicates for the spontaneous adsorption. The pseudo-second-order kinetic model has much more reasonable for metal ions adsorption process (R 2 = 1.0 approx.).
