Degradation Of Phenol By EF Method And Its Analysis By HPLC

A direct electrochemical method named electro-Fenton (EF) is based on electrocatalytical generation of Fenton's reagent to produce hydroxyl radicals, which are very active toward organic compounds. An industrial pollutant phenol, which is one of the most typical and difficulty degradated aromatic compounds, was chosen for this study and was mineralized. The effects of some factors such as current density, pH value, and supporting electrolyte on EF recation to degrade phenol were investigated.A method of choicing operating conditions in HPLC was proposed. Proper HPLC operating conditions were defined which could determine the degradation intermediates of phenol. These conditions include column, mobile phase, flow rate, detection wavelength, solvent and the choice of quantity and quantity method. The analysis of the compounds investigated required no longer than 15 minutes.The results showed that: (p. The effecting factors on EFreaction is current density, pH value, and supporting electrolyte. When i was 10mA/cm2, pH was 3.5, and the supporting electrolyte was NaF , it can generate of hydroxyl radicals to degradate phenol and the degradation rate is 76% by Spectrometric analysis; (2). A proper HPLC operating conditions was proposed. Suitable chromatographic condition: RPC18 column and the columntemperature was ambient; The mobile phase was mixture of methanol and water (60/40, v/v) maintained at a flow rate of 0.5mL/min. The UV detector was used at a wavelength of 278nm. Under this conditions, it can separate and analyze the mechanism of degradating phenol byhydroxyl radicals. The major intermediary degradation products was para-dioxybenzene, catechol, malefic acid.The analysis method of HPLC is simple, rapid and reproducible well. It's recovery rate is 90.48%~102.4% and precision data is 0.9%-1.4%.