Smart green copper nanoparticles for dye‐polluted water treatment

Abstract The extensive utilization of synthetic dyes, such as Reactive Red S3B (RRS3B), and their discharge into water bodies has seriously threatened the environment and human health. Green zero‐valent copper nanoparticles (Cu 0 NPs) were synthesized via Ficus Benjamina leaves extract as a natural reducing and capping agent. FTIR and SEM were used to evaluate the generated Cu 0 NPs, verifying their production, stability, and morphology. The ensuing nanoparticles of zero‐valent copper ranged in size from 16.2 to 18.5 nm. Under various conditions, the adsorption and catalytic effectiveness of the Cu 0 NPs in eliminating (decolorizing) RRS3B dye from aqueous solutions were precisely examined. After testing several adsorption models, the Langmuir isotherm ( q max = 126.58 mg g −1 , R 2 = 0.9995) showed the best fit, indicating monolayer adsorption. The kinetic analysis supported the pseudo‐second‐order model ( R 2 = 0.9994), indicating chemisorption. Considering the information gathered and the successful research, the green Ficus‐nZVCu adsorbent is a hopeful material for removing RRS3B owing to its high surface area and redox activity. Response surface methods and artificial neural network models confirmed the impact of major operational parameters. This study features the potential of green‐synthesized Cu° NPs for the efficient and environmentally safe remediation of wastewater contaminated with dyes.