Degradation Treatment of p-Phenylenediamine by Self Electro-generative Fenton Process
Date Issued
2010
Date
2010
Author(s)
Hsieh, Wei-Che
Abstract
Advanced oxidation process is the best method for wastewater treatment. According to the different classification of reaction mechanisms, Electro-Fenton process and Photo-catalytic reaction have the most common applications. In this study, the AP-CC represented that the anode was Platinum (Pt) and the cathode was carbon cloth which was fed with oxygen. The applied voltage was set to produce H2O2 at the cathode. When the Fe2+ was added into the solution, the system was called AP-CC-Fe2+ system in this research. Afterward, the iron (Fe) replaced the Pt as the anode with zero applied voltage and the system was named AF-CC-Iapp=0mA. Besides, the Fe was oxidized to generate current and Fe2+, and the organics will be decomposed by Fenton process.
The flux of oxygen, the initial pH value, and the reaction temperature were discussed in this experiment of H2O2 formation. The average formation rate of H2O2 is proportional to the applied current. Moreover, the electrolysis constant is 10-4 M.A-1min-1 according to the electrolyzing p-phenylenediamine experiment.
p-Phenylenediamine causes the quite serious environmental pollution because of its popular applications in hair dye and artificial fiber synthetic industry. The initial pH value and the Fe2+ concentration were discussed in AP-CC-Fe2+ system. The optimum condition is pH=3 and [Fe2+]=3mM, and the overall rate constant is 5.35×10-2min-1.
According to the AF-CC-Iapp=0mA system in the self electro-generative process, the influences of the initial pH value and the flux of oxygen on degradation rate were studied. The degradation efficiency was enhanced with the condition of pH=7 and [O2]=60ml.min-1, and the overall rate constant is 2.85×10-2min-1. In the AF-CC-Iapp=0mA system, p-phenylenediamine can be degraded by self electro-generative process without applied voltage and Fenton reagents.
Subjects
Advanced oxidation process
p-phenylenediamine
Electro-Fenton process
anodic oxidation of iron
self electro-generative current
SDGs
Type
thesis
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