Method and device for removing organic matters from water by using double-pool double-effect visible light in response to photo-electro-Fenton reaction

Abstract

The invention discloses a method and a device for removing organic matters from water by using double-pool double-effect visible light in response to a photo-electro-Fenton reaction. The device comprises a cathode pool, an anode pool, a saturated potassium chloride (KCl) salt bridge, a visible light response semiconductor membrane material anode, a carbon-iron composite material oxygen negative electrode, an air pump, a magnetic stirrer, a direct current stabilized voltage power supply and a visible light source, wherein an anode performs photoelectrocatalysis under the actions of visible light and anode bias voltage to remove organic pollutants from water; the carbon-iron composite material oxygen negative electrode performs cathode potential reduction on O2 under the conditions of external voltage and introduced air to produce hydrogen peroxide which is subjected to an electric Fenton reaction to generate active substances such as hydroxyl radicals and the like capable of effectively removing the organic matters from the water; electrons produced by a photoanode migrate towards an oxygen cathode under the action of anode bias voltage; the O2 is reduced by the electrons on the cathode to generate more H2O2; and the H2O2 produced on the cathode cannot migrate to the anode pool for consumption, so that higher H2O2 concentration is ensured, and the oxidation reaction of the organic matters by electric Fenton is ensured. The method and the device are suitable for treating various types of organic waste water.

Description

A double-cell double-effect visible light response photoelectric Fenton method and device for removing organic matter in water technical field The invention relates to a method and a device for removing organic matter in water by a visible light-responsive double-cell double-effect photoelectric Fenton, belonging to the technical field of water pollution control. Background technique Since Fujishima et al. discovered in 1972 that illuminated TiO2 semiconductor electrodes have the function of splitting water, especially in 1976, Cary et al. successively reported that TiO2 water systems can degrade various refractory organic compounds under ultraviolet light irradiation. The method of treatment has attracted extensive attention. Most of the research work published earlier chose the photocatalytic oxidative degradation of organic matter in the suspension system of nanoparticles in powder state. In recent years, research at home and abroad has mainly focused on catalyst surfa...

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Suitable for all kinds of organic wastewater treatment

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