INTEGRATING SONO-PHOTO-FENTON-LIKE AND NANO ZERO-VALENT IRON (NZVI) IN TNT YELLOW WATER TREATMENT

Abstract

Yellow water (YW) generated from the 2,4,6-Trinitrotoluene (TNT) production contains high concentrations of nitroaromatic compounds that pose serious risks to human health, ecosystems, and the environment. In this study, the removal of nitrotoluene compounds in yellow water treatment using the Sono-Photo-Fenton-like process combined with zero-valent iron nanoparticles (nZVI) was evaluated. The parameters of hydrogen peroxide dosage, nZVI dosage, ultraviolet power, and ultrasonic power on TNT degradation in yellow water treatment were investigated using the response surface methodology (RSM) to determine the optimal conditions. The findings demonstrated that at a pH of 3.0, with an initial TNT concentration of 80.8 mg L^-1, an nZVI dosage of 2 mM, a hydrogen peroxide concentration of 80 mM, an ultrasonic power of 60 W, and an ultraviolet power of 30 W, a TNT removal efficiency of 88.19% was attained after a reaction duration of 60 minutes.