Аннотация
The buildup of plastic microparticles in water is a serious problem that requires new, faster ways to break them down. Polystyrene is one of the toughest pollutants to destroy. Because of its large phenyl groups, microbes can hardly break it down, making the material very stable. In this study, we looked at how to decompose polystyrene particles in water using the Fenton process (FeSO 4 * 7H 2 O/H 2 O 2 ). We ran the experiments at a stable temperature of 35-40°C and a pH level of 2-3. Keeping the pH in this narrow range is vital; it keeps the iron active and stops it from settling out as a solid. Under these conditions, the system starts producing hydroxyl radicals (•OH). These radicals are powerful oxidizers that pull hydrogen atoms from the polymer frame, which breaks the carbon-carbon bonds and cuts the size of the molecules. To see how the surface changed before and after the reaction, we used optical and scanning electron microscopy (SEM). The images clearly show the plastic wearing away, with deep cracks, chips, and small pits (cavities) appearing. We also checked the particle sizes using dynamic light scattering (DLS). The data confirmed that the particles became significantly smaller after the treatment.Our results prove that the Fenton reaction effectively starts the breakdown of strong aromatic polymers. Therefore, this method is a promising step for industrial wastewater treatment systems.