Electrochemical heterogeneous catalytic degradation of wastewater containing phenol.
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.
Jia
Baojun
B
Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo, Henan, China. jbjqjl@yahoo.com.cn
Zhang
Dong
D
Zhang
Ai L
AL
Zhou
Ji T
JT
D002384:Catalysis; D002623:Chemistry Techniques, Analytical / Q000379:methods; D004553:Electric Conductivity; D004563:Electrochemistry / Q000379:methods*; D004573:Electrolytes; D004867:Equipment Design; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007700:Kinetics; D010100:Oxygen / Q000737:chemistry; D019800:Phenol / Q000032:analysis; D014865:Waste Disposal, Fluid / Q000379:methods; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000379:methods*
D004573:Electrolytes; D007220:Industrial Waste; D014873:Water Pollutants; D014874:Water Pollutants, Chemical; D019800:Phenol; D010100:Oxygen