Carbon-based materials have garnered significant attention as highly efficient adsorbents for wastewater treatment, owing to their cost-effectiveness and remarkable stability. In this research, activated carbon derived from biomass, specifically agricultural waste, emerges as a promising choice for the adsorption of organic pollutants. Various characterization techniques, including XRD, FTIR, SEM/EDX, pHzpc, and Boehm titration, were employed to delineate the distinctive features of our activated carbon (AC-Ws). Furthermore, Response Surface Methodology (RSM) was utilized to scrutinize the interplay of bisphenol A (BPA) concentration, pH, AC-Ws mass, and temperature on BPA uptake. Under optimal conditions, a remarkable 97.47 % efficiency in BPA removal was achieved. Thermodynamic analysis revealed the favorable and endothermic nature of the adsorption process. The pseudo-second-order kinetic model accurately described the experimental data, while the Langmuir isotherm model aptly captured the equilibrium data, disclosing a maximum BPA adsorption capacity on AC-Ws of 238.63 mg/g. To evaluate the reusability of the AC-Ws adsorbent, five cycles of pollutant removal experiments were conducted. Moreover, the adsorption mechanism on AC-Ws surface sites was explored using Density Functional Theory (DFT).