Procese de oxidare avansată a surfactantului anionic dodecilbenzosulfonat de sodiu [Articol]

Abstract

This study investigates the degradation of sodium dodecylbenzenesulfonate (SDBS), an anionic surfactant and persistent contaminant commonly found in industrial waste-water, through advanced oxidation processes (AOPs). The experimental research focused on eva-luating and comparing the efficiency of Fenton and photo-Fenton processes. Kinetic parameters were analyzed in relation to pH, hydrogen peroxide concentration, and ferrous ion concentration. Under optimal conditions (pH = 3,0 [H2O2]0 = 1 · 10-3 М and [Fe2+]0 = 1 · 10-4 М), the conventional Fenton process achieved a degradation efficiency of approximately 42.5%, with a reaction rate of 2.47 · 10-7 M/s. In contrast, the photo-Fenton process, enhanced by UV-C irradiation, significantly improved the oxidative performance, resulting in a degradation efficiency of up to 70.2%.