Study of phenol removal using fluidized-bed Fenton process

In this paper, the removal of phenol from simulated wastewater was studied using gas–liquid fluidized bed with the Fenton reagent. The factors that affect the removal rate of phenol were investigated, including the initial concentrations of hydrogen peroxide [H2O2] and [Fe2+], the molar ratio of [Fe2+]/[H2O2], pH value, temperatures, reaction time, and the ventilation volume. It was found that the optimal operating conditions existed as: [H2O2] = 12 mmol/L, [H2O2]/[Fe2+] = 4:1, pH = 4, T = 60 °C, reaction time of 30 min, and a ventilation volume of 0.12 m3/h. Under these conditions, the phenol removal rate of about 96% was obtained.

► Using gas–liquid fluidized bed significantly increased phenol removal rate in a simulated wastewater treatment using Fenton reagents. ► When the gas flow rate is 0.12 m3/h, the phenol removal rate reaches the maximum rate of 95.67%. ► The optimal treatment conditions were determined for the phenol concentration of 100 mg/L.