The detoxification of simulated solution contaminated with lead and copper was achieved with activated alumina synthesized via direct method. The composite was characterized by various techniques, such as fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), Energy Dispersive X-ray spectrometer (EDX), EDS element mapping analysis and the metals concentration was estimated using the Atomic absorption spectroscopy (AAS). The synthesized activated alumina possessed nano-size morphology. The Sorption dynamics were investigated using various kinetics models and thermodynamic equations. Adsorption mechanism could be described with the pseudo-second order kinetics. Adsorption is spontaneous and endothermic.