Investigation of Effective Factors for Fenton like Process in Para!Chlorophenol Removal from Aqueous Solutions

Backgrounds and 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 (Fe0/H2O2) 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.