Mechanism Of Photo-Fenton Reaction Used To Degradation Of Dyes And Nondyes Pollutants

During the past two decade, hydroxyl radical(·OH) chemistry has attracted wide interest in oxidation technologies in wastewater treatment. The homogeneous Fenton and Photo-Fenton reaction has been commonly used as the source of ·OH radicals . The research of this field related to the difficult and urgent degradation of organic pollutants and "green" chemical methods,it becomes one of international leading and hotspot. The center of C/O free radical and Fe^â…£=O high valent metal intermediate's reaction mechanism is still in dispute. In this research, we have a research about Photo-Fenton by degradation dye and nondye pollutants' reaction mechanismSeveral model nonbiodegradable pollutants, such as Orange II, Malachite green ,Methyl Violet, sulforhodamine B(SRB), and N-methylaniline, benzoic acid as the target pollutants, was carried out to be photo-oxidated in this system by using the UV-Vis Spectrophotometer, High Pressure Liquid Chromatograph ,Total Organic Carbon and Electron spin resonance (ESR), proposing a Photo-Fenton by degradation dye and nondye pollutants' reaction mechanism. In the reaction of Photo-Fenton, Sulfonic salicylic Fe(III) associated with Sulfonic salicyl acid to become amaranth FeSsal+ at pH value in 1.8².5.In the process of reaction with cation pollutants ,the mechanism is FeIV=O mechanism.The FeIV=O get hydrogen from the pollutants and destroy those structure,so it become the small molecule. Sulfonic salicylic Fe(III) associated with Sulfonic salicyl acid to become brown FeSsal- at pH value in 4⁸. In the process of reaction with cation pollutants ,the mechanism is hydroxyl radical mechanism. The cation pollutants give FeSsal- a electron and the Fe(III) become Fe( II ),then Fe( II) react with H₂O₂...