Treatment of Industrial Wastewater Containing Phenol Using the Electro-Fenton Technique in Gas Sparged Cell
[1]
A. Abdelaziz, Chemical Engineering Department, Alexandria University, Alexandria, Egypt.
[2]
A. A. Mubarak, Chemical Engineering Department, Alexandria University, Alexandria, Egypt.
[3]
S. A. Nosier, Chemical Engineering Department, Alexandria University, Alexandria, Egypt.
[4]
M. Hussien, Chemical Engineering Department, Alexandria University, Alexandria, Egypt.
The present study is concerned with evaluating the performance of Electro-Fenton process using iron electrodes as an alternative wastewater treatment technique. In this method, hydrogen peroxide is externally added into the system while a sacrificial iron anode is used as Fe+2 source so Fenton reaction was formed in the reactor. The batch reactor was stirred by introducing nitrogen gas through G4 type sintered glass and a synthetic solution of phenol was used to simulate wastewater. The effect of various process parameters such as: pH, gas superficial velocity, current density, H2O2 concentration, initial phenol concentration, and NaCl concentration on the electro-Fenton reaction was investigated to achieve maximum degradation efficiency. The batch experimental results revealed that the overall COD reduction reached 97% for initial phenol concentration 50 mg/l. The optimum pH, superficial gas velocity, current density was 3, 1.18 cm/s, 1.7 mA/cm2 and H2O2 concentration was 1500 mg/l, respectively. The kinetic study revealed that the rate of COD reduction followed a pseudo first order reaction. Energy consumption and iron electrode consumption were calculated per gram of COD removed.
Electro-Fenton, Phenol, Wastewater, Iron Electrode, Gas Sparged Cell
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