Abstract
2,4-Dinitrotoluene (DNT) is a highly toxic compound of nitrotoluene group causing negative impacts on mammals, fish, and human health that needs to be treated before discharging. The study aimed to evaluate the affecting factors on efficiency of DNT treatment by Sono-Photo-Fenton process using zero-valent iron catalysts (nZVI), including: pH, intial DNT concentration, nZVI catalyst concentration, hydrogen peoxide concentration, light power, and ultrasonic power. After 20 minutes of Sono-Photo-Fenton reaction, the DNT removal efficiency was 100% with optimal operating conditions as following: pH=3.0, CDNT = 50 mg/L, CH2O2 = 20 mM, CnZVI = 1 mM, UV power of 10 W, ultrasonic power of 80 W.
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