In this work, Bauhinia tomentosa leaves were used as a biosorbent that can remove methyl red dye from aqueous solutions. Pseudo-first-order and pseudo-second-order models were used to assess adsorption kinetics, and Langmuir and Freundlich isotherms were used to analyze equilibrium data. The results indicate that the adsorption process follows the Langmuir isotherm. The system fitting the Langmuir isotherm model indicates that adsorption occurs on a uniform surface with a finite number of identical sites. Besides, the Langmuir constant RL value is ranged between 0 and 1, confirming favorable adsorption the maximum adsorption capacity found to be 9.699 mg/g for Bauhinia tomentosa leaves powder. The best fit was given by the pseudo-second-order kinetic model and displayed higher correlation coefficients. Additionally, silver nanoparticles were synthesized using the extract of the Bauhinia tomentosa leaves, exhibiting a significantly higher removal efficiency of methyl red compared to the plant-based biosorbent. These results highlight Bauhinia tomentosa's leaves extract shows potential as an environmentally friendly method of producing nanoparticles for wastewater treatment applications, as well as a sustainable biosorbent.