Electrochemical reactor for simultaneously removing arsenic and fluorine pollutant in water and method

Abstract

The invention relates to an electrochemical reactor and a method which can remove arsenic and fluorin pollutants in water at the same time. Ferrum and aluminium electrodes are coupled, ferrum and aluminium ions are generated by electric induction and trivalent arsenic is converted into pentavalent arsenic by electrooxidation at the same time. Ferrum and aluminium ions generated through electrolysis further form ferrum and aluminium flocs, which respectively react with arsenic and fluorin pollutants in water to remove arsenic and fluorin pollutants in water at the same time. The bottom of an electric coagulation reactor of the invention is provided with a water distribution plate, the upper part of which is provided with dimensionally stable electrodes, ferrum plate electrodes and aluminium plate electrodes that are fixed to an insulating bar through an insulation spacer and nuts; the dimensionally stable electrodes, the ferrum plate electrodes and the aluminium plate electrodes alternate at intervals as an anode and a cathode, or as a cathode and an anode, and are arranged in the reactor in a parallel manner; wherein, the adjacent dimensionally stable electrodes are respectively connected with the anode and the cathode of a direct current power source and timed anode and cathode switch is carried out so as to improve the reaction efficiency of the electrode and inhibit passivation of the electrode. The method can be applied to remove arsenic and fluorin pollutants in drinking water respectively or at the same time.

Description

Electrochemical reactor and method for simultaneously removing arsenic and fluorine pollutants in water technical field The invention belongs to the field of water treatment, and particularly relates to an integrated method for electrolyzing iron and aluminum anodes by an electrochemical method, generating iron ions and aluminum ions online, and efficiently removing arsenic and fluorine pollutants in drinking water or waste water through coagulation electrochemical reactor. The present invention also relates to a method for simultaneously removing arsenic and fluorine pollutants in drinking water or waste water by using the above-mentioned electrochemical reactor. Background technique Fluoride and arsenic contamination of drinking water is a global problem. The fluorine content in normal drinking water is between 0.5 and 1.0 mg / L. If the fluorine content exceeds 1.0mg / L, it will cause fluorosis, and severe patients may cause skeletal fluorosis. Arsenic is carcinogenic ...

AI Technical Summary

Problems solved by technology

For example, arsenic and fluoride ions are adsorbed and removed separately by segmented adsorption units, but this type of operation process is relatively complicated, and there is no reaction device, especially an integrated electrochemical reactor, that can simultaneously remove arsenic ions and fluoride ions in water.

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