A Comparison Experiment of Different Electrochemical Processes for Phenol-containing Wastewater Treatment
|School||Northwest Normal University|
|Keywords||Electro-catalytic oxidation Power -Fenton method Three-dimensional electrode method Phenol degradation rate|
Electrochemical treatment of organic wastewater in recent years developed a green technology, has great potential for development. This paper uses electro-catalytic oxidation, electro-Fenton method, three-dimensional electrode method, three-dimensional electrode and electrically-Fenton coupling method for degradation of phenol wastewater, orthogonal test design the optimal conditions for a variety of methods, and focus compared four methods under optimal conditions the merits of the treatment effect. While the optimum processing conditions were least squares fit for the degradation process research provides some basis. This paper also electro-catalytic oxidation and electro-Fenton degradation process of the law of · OH trace determination of degradation mechanism study provides some basis. The content of phenol solution with 4 - amino antipyrine method. By phenol concentration changes before and after treatment compared the merits of the methodology used. · OH concentration in the solution is for the colorimetric determination of salicylic acid as a probe. By measuring the resulting red solution, 2,3 - dihydroxy benzoic quantity of · OH content derived indirectly. Through this experiment can be drawn: electro-catalytic oxidation of phenol wastewater under optimal conditions 120min degradation rate 88.7%; electric-Fenton method under optimal conditions Phenol Wastewater 120min degradation rate of 99.4%; dimensional electrode method under optimal conditions Phenol Wastewater Treatment 80min degradation rate of close to 100%; dimensional electrode electrically-Fenton coupling method with optimal conditions Phenol Wastewater Treatment 60min degradation rate close to 100%. Under certain conditions, four kinds of electrochemical merits of phenol wastewater treatment order: three-dimensional electrode and electrically-Fenton coupled France> 3D electrode method> Power-Fenton method> electro-catalytic oxidation. For optimum conditions, four kinds of methods for degradation of phenol were least-squares fitting procedure, the results show that four kinds of methods are well with a kinetic reaction law. Through the course of the reaction of · OH tracking determination to catch, formation of · OH derived organic matter degradation rate with good correlation between, and showed a positive correlation. Through this study, can be considered the introduction of the three-dimensional electrode electrocatalytic oxidation and electro-Fenton reaction system by two or more treatment methods in conjunction with, you can achieve greater efficiency and lower energy consumption. Meanwhile, respectively electrocatalytic oxidation and electro-Fenton system, the system for tracking the · OH concentration measured for electro-catalytic oxidation and electro-Fenton method of the mechanism of degradation of organic matter and learn to do some groundwork.