[Investigation of effective factors for fenton like process in para-chlorophenol removal from aqueous solutions]

ABSTRACT

Chlorophenol compounds are used frequently in industries including petrochemical, producing pesticide and herbicides, producing antimicrobial agents, pharmaceutical and refineries. These compounds can enter the environment through the wastewater industries. This investigation has studied the application of Fenton-like process [Fe[0]/H[2]O[2]] in removal of Parachlorophenol. A laboratory scale study was done on a synthetic wastewater containing Para-chlorophenol. Concentration of 10 mg/L of Para-chlorophenol was prepared then optimal values of affecting parameters such as pH, hydrogen peroxide, and iron powder and detention time in the process for Para-chlorophenol removal were determined. The optimum pH, molar ratio of hydrogen peroxide on Para-chlorophenol, hydrogen peroxide on iron powder and time were 4, 18.8, 0.4 and 5 minutes respectively. The results showed that removal efficiency in optimal conditions for concentrations of 10, 50 and 100 mg/L are 93.9, 94.4 and 94.3 respectively. The study showed the rate of mineralization of Para-chlorophenol is not completed. According to the results of this study and high resistance in degradation by biological processes, Fenton like process can be used for conversion Para-chlorophenol resistant compound to other compounds with ability of higher biological degradation and lower toxicity