Abstract
An electrochemical-heterogeneous catalytic process was applied to remove phenol from wastewater. Three key factors-applied potential, supporting electrolyte concentration, and pH-were tested for their effects on the phenol removal. The optimal condition was determined as an applied potential of 25 V, Na(2)SO(4) concentration of 500 mg L(-1), and a pH of 2.5. Under the optimal condition, the phenol and chemical oxygen demand (COD) removals were 83.7% and 42.9%, respectively. The apparent kinetics of phenol removal could be expressed as a pseudo first-order reaction. In addition, a possible mechanism of phenol degradation was proposed based on the intermediate products.
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