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

A reactor and electrochemical technology, which is applied in the field of integrated electrochemical reactors, can solve problems such as complex operation processes, and achieve the effects of inhibiting electrode passivation, effective removal and treatment

Active Publication Date: 2009-03-18
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] See figure 1 with 2 . The bottom in the electrochemical reactor 1 prepared by the organic glass material with the flange plate 2 at the top and the bottom and the water distribution plate 3 prepared by the organic glass material, there is an insulating pad on the top of the water distribution plate 3 1 piece of iron plate electrode and 1 piece of aluminum plate electrode 6 and 2 pieces of shape-stable electrodes 5 fixed on the insulating rod 9 with piece 8 and nut 7, there is a bolt port 4 on the flange plate, through which the flange plate 2 can be connected again Chemical Reactor 1.

[0064] The shape-stable electrodes are intermittently alternately switching the positive and negative poles of the power supply as the anode and cathode, or as the cathode and the anode, and are installed in parallel in the electrochemical reactor 1; the two shape-stable electrodes are respectively connected to the external circuit of the reactor. The two external circuit wires are re...

Embodiment 2

[0073] See figure 1 with 3 . There is a water distribution plate 3 made of organic glass material at the bottom of the electrochemical reactor 1 made of stainless steel with flanges 2 on the top and bottom, and an insulating gasket 8 is arranged above the water distribution plate 3 2 iron plate electrodes, 1 aluminum plate electrode 6 and 2 shape-stable electrodes 5 fixed on the insulating rod 9 with nut 7; there is a bolt port 4 on the flange plate, and the electrochemical reaction can be connected through the flange plate 2 Device 1. The plate connection mode is shape stable electrode-iron plate-aluminum plate-iron plate-shape stable electrode. Wires connected to the external circuit of the electrochemical reactor are respectively connected to the outermost shape-stable electrodes on both sides, and the two external circuit wires are respectively connected to the positive pole and the negative pole of the DC power supply.

[0074] A water inlet is opened on the side wall...

Embodiment 3

[0080] Seefigure 1 with 3 . There is a water distribution plate 3 made of organic glass material at the bottom of the electrochemical reactor 1 made of stainless steel with flanges 2 on the top and bottom, and an insulating gasket 8 is arranged above the water distribution plate 3 2 iron plate electrodes, 1 aluminum plate electrode 6 and 2 shape-stable electrodes fixed on the insulating rod 9 with nut 7; there is a bolt port 4 on the flange plate, and the electrochemical reactor can be connected through the flange plate 2 1. The electrode connection method is shape-stable electrode-iron plate-iron plate-aluminum plate-shape-stable electrode, and the distance between the plates is 3 cm.

[0081] The shape-stable electrodes are intermittently alternately switching the positive and negative electrodes of the power supply as the anode and the cathode, or as the cathode and the anode, and are installed in parallel in the reactor 1; the shape-stable electrodes are connected with t...

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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

technical field [0001] 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. [0002] 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 [0003] 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 and harmful to the respiratory tract, blood vessels, heart and central nervous sys...

Claims

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Application Information

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IPC IPC(8): C02F1/463C02F1/58
Inventor 曲久辉赵旭刘会娟刘锐平胡承志雷鹏举
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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