This study evaluated the adsorptive potential of Tommy Atkins mango peel as a biosorbent for removing lead ions from synthetic aqueous solutions. The mango peels were obtained in the city of Crato - CE, dried in an oven at 313.15 K for three days, and then ground to a uniform powder. The material was characterized using X-Ray Fluorescence, Fourier Transform Infrared Spectroscopy, and Scanning Electron Microscopy. The fluorescence results indicated that the peel has a high potassium (5.093%) and calcium (2.170%) content, as well as significant incorporation of lead ions (28.882%) after the adsorption process. Infrared analysis identified functional groups such as -OH, -CH, -C=O, and -C-O, which are crucial for retaining metal ions. Electron microscopy images revealed a fibrous structure and uniform porosity, favoring adsorbent-adsorbate interaction. Kinetic studies showed that the pseudo-first-order model was the most suitable for describing the process, with an adjusted R² of 0.96258. The equilibrium time was reached in 60 minutes, with an adsorption capacity of 9.65 mg g⁻¹. Adsorption isotherms revealed that the Sips model provided the best fit to the experimental data, with maximum adsorption capacities of 72.57, 51.44, and 30.92 mg g⁻¹ at temperatures of 278.15 K, 298.15 K, and 318.15 K.