This technology utilizes sweet gum tree seed extracts to produce zinc oxide nanoparticles (ZnONPs) through a green synthesis process, eliminating the need for toxic chemicals and high energy inputs common in traditional methods. The synthesized ZnONPs have been experimentally validated to effectively remove the toxic fungicide atrazine from water, achieving significantly higher removal efficiency than raw seed extract alone. Characterization techniques confirm the purity and structure of the nanoparticles, making this approach a sustainable alternative for environmental remediation.