<p>Dyes are widely used across industries such as textiles, cosmetics, and pigments, with global annual production exceeding 7 × 10⁵ tons.&#xa0;Dye pollution from industrial wastewater poses significant environmental challenges, necessitating the development of efficient and sustainable adsorbents. Silver nanoparticles (AgNPs) synthesized from Abies pindrow cone extract (APC-Ag-NPs) via an environmentally friendly green reduction method were investigated for their efficacy in removing methylene blue (MB) dye from aqueous solutions. The prepared APC-Ag-NPs were&#xa0;comprehensively characterized using Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), dynamic light scattering (DLS), and zeta potential analysis to elucidate their structural, morphological, and colloidal properties. Adsorption experiments&#xa0;systematically examined the effects of adsorbent dosage, particle size, initial dye concentration, and temperature on MB removal efficiency. The results demonstrated that&#xa0;smaller particle sizes (40–60 nm) achieved a superior dye removal efficiency of up to 95%, attributable to their increased surface area. Additionally,&#xa0;higher initial dye concentrations enhanced adsorption due to greater concentration gradients. The&#xa0;optimal removal efficiency (92%) was observed at an adsorbent dosage of 0.5 g/L, while higher dosages resulted in reduced performance, likely due to underutilization of active sites.&#xa0;Increasing the temperature led to a decrease in adsorption capacity, indicating that the process is exothermic.&#xa0;Kinetic studies revealed that the adsorption suggesting multilayer adsorption on heterogeneous surfaces. This study underscores the potential of APC-Ag-NPs as a cost-effective and environmentally sustainable adsorbent for dye removal in wastewater treatment, offering a promising and scalable solution for environmental remediation.</p> Graphical Abstract <p></p>