Degradation of acid fuchsine by a modified electro-Fenton system with magnetic stirring as oxygen supplying.
The current modified electro-Fenton system was designed to develop a more convenient and efficient undivided system for practical wastewater treatment. The system adopted a cathode portion that employed magnetic stirring instead of common oxygen gas diffusion or gas sparging to supply oxygen gas for the electrolyte solution. Key factors influencing the cathode fabrication and activity were investigated. The degradation of acid fuchsine with a self-made graphite-polytetrafluorethylene cathode was studied using a spectrophotometer. It was found that the cathode generated hydrogen peroxide with high current efficiency and the hydrogen peroxide yield of the cathode did not decay after 10 times reuse. With the Pt anode at a ferrous ion concentration of 0.5 mmol/L, a pH of 3, and using magnetic stirring, dye decolorization could be rapidly accomplished but the destruction of benzene rings and intermediates was fairly difficult. With a Fe anode, dye degradation was more complete.
Sheng
Yiping
Y
College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China. syp541113@163.com
Zhen
Limin
L
Wang
Xiuli
X
Li
Ning
N
Tong
Qi
Q
D001557:Benzenesulfonates / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry; D055664:Electrochemical Techniques / Q000295:instrumentation*; D004566:Electrodes; D006108:Graphite / Q000737:chemistry; D006861:Hydrogen Peroxide; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D010100:Oxygen / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000737:chemistry
D001557:Benzenesulfonates; D004396:Coloring Agents; D014874:Water Pollutants, Chemical; D006108:Graphite; C086337:acid fuchsin; D006861:Hydrogen Peroxide; D010100:Oxygen