Method and device for electrochemically degrading oxidizing anions in polluted water by using working medium filled ionic membrane three-dimensional electrode

Abstract

The invention designs a method and a device for electrochemically degrading oxidizing anions in polluted water by using a working medium filled ionic membrane three-dimensional electrode, and innovatively provides an overall electrode design thought of a working medium filled ionic membrane three-dimensional electrode. Ion exchange membranes in a cathode ion membrane plate and an anode ion membrane plate in the electrolysis device all adopt anion exchange membranes, a cathode filling material and an anode filling material all adopt the same medium containing reducing cations, and meanwhile, a power supply mode of continuously reversing a cathode and an anode is adopted; therefore, toxic and harmful oxidizing anions in the polluted water are continuously degraded, and meanwhile, the filling medium is continuously reduced to the original state by the electrode reaction, so that the purpose of catalytic degradation is achieved. The invention overcomes the defects of the conventional method for treating polluted water, is a brand-new advanced wastewater treatment technology which does not generate concentrated water and solid waste, and can continuously treat wastewater as long as being electrified.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to a three-dimensional ion-exchange membrane electrode for electrochemical water treatment, and more particularly to a method and apparatus for electrochemically degrading oxidizing anions in polluted water using a working medium-filled three-dimensional ion-exchange membrane electrode. Background Technology

[0002] Currently, in the field of water treatment technology, besides chemical or electrochemical oxidation-reduction and coagulation-precipitation degradation, the remaining trace ion deep treatment methods for treating toxic and harmful anions and cations in water typically include: activated carbon adsorption, diatomaceous earth, clay, bentonite, etc. adsorption methods, resin adsorption, and ion exchange resin adsorption-regeneration methods; in addition, there are reverse osmosis and electrodialysis technologies. Currently, to completely degrade harmful ions in water and ensure long-term equipment use, reverse osmosis and electrodialysis technologies are the primary technologies used. However, they each have their own drawbacks: adsorption methods can lead to subsequent solid waste or regeneration processes; both reverse osmosis and electrodialysis technologies produce concentrated wastewater that requires further treatment. To overcome these drawbacks, it is essential to research a novel wastewater deep treatment technology that does not produce concentrated wastewater or large amounts of solid waste. Therefore, this invention designs a method and apparatus for the electrochemical degradation of oxidizing anions in polluted water using a working medium-filled ion-exchange membrane three-dimensional electrode to solve the above problems. Summary of the Invention

[0003] This invention addresses the shortcomings of existing water pollution treatment technologies, particularly those targeting the treatment of toxic and harmful oxidizing anions in polluted water. It presents a novel electrochemical water treatment process using a working medium-filled ion-exchange membrane three-dimensional electrode, specifically a method and apparatus for the electrochemical degradation of oxidizing anions in polluted water. This method achieves deep degradation of toxic and harmful anions in polluted water without producing concentrated wastewater or large amounts of solid waste, exhibiting high production efficiency and aligning with new trends in environmental protection. This invention is implemented using the following technical solution:

[0004] A device for the electrochemical degradation of oxidizing anions in polluted water using a three-dimensional electrode with a working medium-filled ion-exchange membrane comprises three parts: 1. a "cathode section (cathode zone)", 2. a "polluted water treatment zone", and 3. an "anode section (anode zone)". Its features are:

[0005] The first, "cathode section (cathode area)," refers to a complete cathode assembly, which consists of a cathode plate, cathode filler (cathode working medium), cathode ion exchange membrane plate, and cathode wires. This cathode section is separated from the polluted water treatment area and the anode area by the cathode ion exchange membrane plate (e.g.,Figure 1 (As shown); Simultaneously, this "cathode portion (cathode area)" can also be made into a standardized three-dimensional electrode, with the electrode's outer shell serving as the cathode ion exchange membrane plate. This three-dimensional cathode is separated from the polluted water treatment area and the anode area via the cathode ion exchange membrane plate (e.g. Figure 2 (As shown).

[0006] The second point, "Polluted Water Treatment Area," is used to introduce polluted water to be treated.

[0007] The third point, the "anode section (anode area)" of the device, is a single anode unit, consisting of an anode plate, anode packing material (anode working medium), an anode ion exchange membrane, and anode wires; this anode section is separated from the polluted water treatment area and the cathode area by the anode ion exchange membrane (e.g., Figure 1 (As shown); Simultaneously, this "anode portion (anode area)" can also be made into a standardized three-dimensional electrode, with the electrode's outer shell being the anodic ion exchange membrane plate. This three-dimensional anode is separated from the polluted water treatment area and the cathode area by the anodic ion exchange membrane plate (e.g. Figure 2 (As shown).

[0008] Further:

[0009] According to the "cathode ion exchange membrane plate" and "anode ion exchange membrane plate" as described above, the features are as follows: both the "cathode ion exchange membrane plate" and the "anode ion exchange membrane plate" are composed of ion exchange membranes and supporting mesh plates. The polarity of the ion exchange membranes in the membrane plates is set differently according to the different polluted waters being treated. When treating the toxic and harmful anions described in this invention, namely, oxidizing anions in polluted water, in a set of electrolysis devices, the ion exchange membranes in the "cathode ion exchange membrane plate" and the "anode ion exchange membrane plate" are arranged according to the following: "cathode" VS "anode" = "anion exchange membrane VS anion exchange membrane", that is, "-VS-", and both the cathode and anode are anion exchange membranes.

[0010] Further:

[0011] According to the "cathode filler (cathode working medium)" and "anode filler (anode working medium)" described above, the characteristic is that: the "cathode filler (cathode working medium)" and "anode filler (anode working medium)" are based on the properties of the polluted water to be treated according to the present invention (oxidizing anions in the polluted water), and the same substance is filled in both the cathode and anode regions, namely: a medium containing reducing cations. This medium can be an aqueous solution or an aqueous solution + solid particles, such as: Fe. 2+ Aqueous solution and solid Fe particles.

[0012] This invention also discloses a method for electrochemically degrading oxidizing anions in polluted water using a working medium-filled ion-exchange membrane three-dimensional electrode. The method of the device of this invention, "a device for electrochemically degrading oxidizing anions in polluted water using a working medium-filled ion-exchange membrane three-dimensional electrode," involves: using an ion-exchange membrane to isolate cations while allowing toxic and harmful oxidizing anions in the polluted water to pass through; simultaneously, degrading the toxic and harmful anions in the polluted water through electrolytic oxidation or reduction methods, in conjunction with the action of "cathode filler (cathode working medium)" and "anode filler (anode working medium); furthermore, by reversing the electrodes, the filler media in the cathode and anode are electrolytically reduced, restoring the reacted "cathode filler (cathode working medium)" and "anode filler (anode working medium)" to their original state, ultimately achieving the purpose of catalytic degradation.

[0013] The method for electrochemical degradation of oxidizing anions in polluted water using a working medium-filled ion-exchange membrane three-dimensional electrode, as described above, is characterized by:

[0014] This method is used when treating oxidizing anions, such as ClO3. - ,ClO - ClO4 - …In its “device for electrochemical degradation of oxidizing anions in polluted water using a three-dimensional electrode with a working medium-filled ion-exchange membrane,” the ion exchange membranes in both the “anion exchange membrane plate” and the “cation exchange membrane plate” are anion exchange membranes, i.e., in the “-VS-” mode; and the “cathode filler (cathode working medium)” and the “anode filler (anode working medium)” are the same material, i.e., catalysts containing reducing cations, such as Fe, FeSO4, etc.

[0015] Furthermore, according to the method described above for the electrochemical degradation of oxidizing anions in polluted water using a working medium-filled ion-exchange membrane three-dimensional electrode, the power supply method for treating oxidizing anions is characterized by the following: a power supply method with continuously switching cathode and anode is employed. During electrolysis, initially, the anode is positively charged and the cathode is negatively charged. After a period of time, the anode is switched to negatively charged and the cathode to positively charged, and this cycle is repeated continuously. The negatively charged electrode can reduce oxidized catalysts, such as iron ions, while the positively charged electrode can draw oxidizing anions from the polluted water into the ion-exchange membrane three-dimensional electrode to react with the filling medium in a redox reaction. This alternating power supply continues until all toxic and harmful components in the polluted water are degraded. Finally, the catalyst is continuously oxidized by oxidizing anions and reduced by electrode reactions within the ion-exchange membrane three-dimensional electrode, resulting in minimal catalyst loss. The entire process is a simple electrocatalytic degradation process that only requires power. The specific reactions are as follows:

[0016] When dealing with oxidizing anions:

[0017] Positive electrode: Toxic X (n+1)- +M n+ →Non-toxic X n- +M (n+1)+

[0018] (The contaminants inside the ion-exchange membrane electrode react chemically with the catalyst in the filling medium)

[0019] Negative electrode: M (n+1)+ +e=M n+ (The catalyst on the cathode is reduced to its original state—an electrochemical reaction)

[0020] Note: Regardless of how the two ion-exchange membrane three-dimensional electrode devices, the "anode section (anode region)" and the "cathode section (cathode region)," are configured, the electrode becomes the positive electrode when a positive current is applied and the electrode becomes the negative electrode when a negative current is applied. Therefore, both of the above two reactions occur at both three-dimensional electrodes.

[0021] Beneficial effects of the present invention

[0022] The beneficial effects of this invention are as follows: This invention provides a method and apparatus for the electrochemical degradation of oxidizing anions in polluted water using a working medium-filled ion-exchange membrane three-dimensional electrode, specifically designed for the treatment of toxic and harmful oxidizing anions in polluted water.

[0023] 1. This invention innovatively proposes an integral electrode design scheme for a working medium-filled ion membrane three-dimensional electrode.

[0024] 2. This invention addresses the treatment of toxic and harmful oxidizing anions in polluted water by innovatively incorporating anion exchange membranes into the cathode and anode of the ion-exchange membrane three-dimensional electrode, where all ion exchange membranes are anion exchange membranes.

[0025] 3. This invention addresses the treatment of toxic and harmful oxidizing anions in polluted water by innovatively using different media containing reducing cations in both the cathode and anode of the ion membrane three-dimensional electrode in a single device.

[0026] 4. This invention innovatively proposes a power supply method that continuously reverses the direction of the cathode and anode for the treatment of toxic and harmful oxidizing anions in polluted water. That is, during electrolysis, the anode is initially positively charged and the cathode is negatively charged. After a period of time, the anode is switched to negatively charged and the cathode to positively charged, and this cycle is repeated continuously. In this way, the toxic and harmful oxidizing anions in the polluted water are continuously degraded. At the same time, the filling medium in the three-dimensional electrode is continuously reduced to its original state by the electrode reaction. In the end, the filling medium is basically not lost, thus achieving the purpose of catalytic degradation. The filling medium is the catalyst.

[0027] 5. This invention overcomes many shortcomings of conventional methods for treating toxic and harmful ions in polluted water, such as the problems associated with subsequent solid waste or regeneration processes in adsorption methods, and the need for further treatment of concentrated wastewater in reverse osmosis and electrodialysis technologies. This method is a novel advanced wastewater treatment technology that produces neither concentrated wastewater nor solid waste; it can continuously treat wastewater as long as electricity is supplied.

[0028] The combined application of the above methods is something that no other existing method has achieved. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the device of the present invention, "a device for electrochemical degradation of oxidizing anions in polluted water by a working medium-filled ion membrane three-dimensional electrode".

[0030] A device for electrochemical degradation of oxidizing anions in polluted water using a three-dimensional electrode with a working medium-filled ion-exchange membrane: 1. Anode zone; 2. Anode plate; 3. Anode filler (anode working medium); 4. Anode ion-exchange membrane plate; 5. Anode wire; 6. Polluted water treatment zone; 7. Cathode zone; 8. Cathode plate; 9. Cathode filler (cathode working medium); 10. Cathode ion-exchange membrane plate; 11. Cathode wire; 12.

[0031] Figure 2 This is another structural schematic diagram of the device of the present invention, "A device for electrochemical degradation of non-metallic cations in polluted water by a working medium-filled ion membrane three-dimensional electrode" (a schematic diagram of a device in which the ion membrane three-dimensional electrode is made into a modular design).

[0032] A device for electrochemical degradation of non-metallic cations in polluted water using a three-dimensional electrode with a working medium-filled ion-exchange membrane: 1. Anode zone; 2. Anode plate; 3. Anode filler (anode working medium); 4. Anode ion-exchange membrane plate; 5. Anode wire; 6. Polluted water treatment zone; 7. Cathode zone; 8. Cathode plate; 9. Cathode filler (cathode working medium); 10. Cathode ion-exchange membrane plate; 11. Cathode wire; 12. Detailed Implementation

[0033] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0034] like Figure 1 As shown, the "device for electrochemical degradation of oxidizing anions in polluted water using a three-dimensional electrode with a working medium-filled ion-exchange membrane" of the present invention comprises three main parts: 1. "Cathode section (cathode region) 8", 2. "Polluted water treatment zone 7", and 3. "Anode section (anode region) 2". Its characteristic is that: the 1. "Cathode section (cathode region)" 8 is a single cathode assembly, consisting of a cathode plate 9, cathode filler (cathode working medium) 10, cathode ion-exchange membrane plate 11, and cathode wire 12; this cathode section is separated from the polluted water treatment zone 7 and the anode region 2 by the cathode ion-exchange membrane plate 11 (e.g., ...). Figure 1 (as shown); Simultaneously, the "cathode portion (cathode region) 8" can also be made into a standardized three-dimensional electrode, with the electrode's outer shell being the cathode ion exchange membrane plate 11. This three-dimensional cathode is separated from the polluted water treatment zone 7 and the anode zone 2 by the cathode ion exchange membrane plate 11 (as shown). Figure 2 (As shown).

[0035] The second point, "Polluted Water Treatment Area," is used to introduce polluted water to be treated.

[0036] The third point, the "anode section (anode area)" 2 of the device, is an integral anode unit. This anode section consists of an anode plate 3, anode filler (anode working medium) 4, an anode ion exchange membrane 5, and an anode wire 6. This anode section is separated from the polluted water treatment area 7 and the cathode area 8 by the anode ion exchange membrane 5 (e.g., Figure 1 (As shown); Simultaneously, the "anode portion (anode region)" 2 can also be made into a standardized three-dimensional electrode, with the electrode's outer shell being the anodic ion exchange membrane 5. This three-dimensional anode is separated from the polluted water treatment zone 7 and the cathode zone 8 by the anodic ion exchange membrane 5 (as shown). Figure 2 (As shown).

[0037] Further:

[0038] As described above, both the "cathode ion exchange membrane plate" 11 and the "anode ion exchange membrane plate" 5 are composed of ion exchange membranes and support mesh plates, and the ion exchange membranes in the membrane plates are all anion exchange membranes.

[0039] Further:

[0040] As mentioned above, both the "cathode filler (cathode working medium)" 10 and the "anode filler (anode working medium)" 4 are made of the same material, namely, a medium containing reducing cations. This medium can be an aqueous solution or an aqueous solution plus solid particles, such as Fe. 2+ Aqueous solution and solid Fe particles.

[0041] Further:

[0042] According to the "cathode plate" 9 and "anode plate" 3 as described above, the characteristic is that both the "cathode plate" and the "anode plate" are made of graphite blocks.

[0043] The working steps of "a device for electrochemical degradation of oxidizing anions in polluted water using a three-dimensional electrode with a working medium-filled ion-exchange membrane" are as follows: 1. Add an aqueous solution containing reducing cations or an aqueous solution + solid particulate medium to the "anode section (anode zone)" 2 and the "cathode section (cathode zone)" 8 of the device, respectively. 2. Add polluted water containing recalcitrant toxic and harmful oxidizing anions to be treated to the "polluted water treatment zone 7". 3. Set the positive and negative working times of the reversible DC regulated power supply, requiring the positive and negative working times to be the same. 4. Turn on the switch of the reversible DC regulated power supply to start treating the polluted water. 5. After a period of treatment, take the treated and degraded polluted water from the "polluted water treatment zone 7" and test its oxidizing anion content. If it meets the standard, the treatment is completed.

[0044] Note that the above treatment embodiment is a static water treatment method. If a dynamic method is used, the "polluted water treatment zone 7" should be designed as a treatment zone with a water flow channel, where polluted water enters from one side and purified water exits from the other side. A multi-stage treatment method can also be adopted.

[0045] Example 1

[0046] This invention, "A Method and Apparatus for Electrochemical Degradation of Oxidizing Anions in Polluted Water Using a Working Medium-Filled Ion-Membrane Three-Dimensional Electrode," provides, as described above, "an apparatus for electrochemical degradation of oxidizing anions in polluted water using a working medium-filled ion-membrane three-dimensional electrode." The polluted water introduced into the "polluted water treatment zone 7" is wastewater treated by a fireworks factory's wastewater treatment plant and still "contains trace amounts of oxidizing anions ClO4." - The polluted water (e.g., potassium perchlorate) had a concentration of 1.5 mg / L. The aqueous medium containing reducing cations added to both the "anodine section (anodine zone)" 2 and the "cathode section (cathode zone)" 8 was a ferrous sulfate (FeSO4) aqueous solution with a concentration of 500 mg / L. The positive and negative working times of the commutated DC regulated power supply were both 5 minutes. After operating according to the above embodiment method for one hour of deep water treatment, a purified water sample was taken and its ClO4 content was tested. - (Perchlorate) content.

[0047] The specific chemical (electrochemical) reactions within the "ion-exchange membrane stereo electrode" are as follows:

[0048] Positive electrode: ClO4 - +Fe 2+ +H₂O→Cl - +Fe3+ +OH -

[0049] (The contaminants inside the ion-exchange membrane electrode react chemically with the catalyst components in the filling medium)

[0050] Negative electrode: Fe 3+ +e→Fe 2+-

[0051] (The catalyst on the cathode is reduced to its original state—an electrochemical reaction)

[0052] Note: Regardless of how the two ion-exchange membrane three-dimensional electrode devices, "anode section (anode region)" 2 and "cathode section (cathode region)" 8, are configured, the electrode will be a positive electrode when a positive current is applied and a negative electrode when a negative current is applied. Therefore, both three-dimensional electrodes will exhibit the two reactions mentioned above.

[0053] Example 2

[0054] This invention, "A Method and Apparatus for Electrochemical Degradation of Oxidizing Anions in Polluted Water Using a Working Medium-Filled Ion-Membrane Three-Dimensional Electrode," provides, as described above, "an apparatus for electrochemical degradation of oxidizing anions in polluted water using a working medium-filled ion-membrane three-dimensional electrode." The polluted water introduced into the "polluted water treatment zone 7" is wastewater treated by a fireworks factory's wastewater treatment plant and still "contains trace amounts of oxidizing anions ClO3." - The polluted water (e.g., potassium chlorate) has a concentration of 1.5 mg / L. The aqueous solution containing reducing cations added to "Anode Part (Anode Zone) 2" and "Cathode Part (Cathode Zone) 8" is a ferrous sulfate (FeSO4) aqueous solution with a concentration of 500 mg / L, with some iron sand particles added in addition. The positive and negative working times of the reversible DC regulated power supply are both 5 minutes. After operating according to the above embodiment method for one hour of deep water treatment, a purified water sample is taken and its ClO3 content is tested. - (Perchlorate) content.

[0055] The specific chemical (electrochemical) reactions within the "ion-exchange membrane stereo electrode" are as follows:

[0056] Positive electrode reaction 1: ClO3 - +Fe 2+ +H₂O→Cl - +Fe 3+ +OH -

[0057] (The contaminants inside the ion-exchange membrane electrode react chemically with the catalyst components in the filling medium)

[0058] Positive electrode reaction 2: Fe - 2e → Fe2+

[0059] (The electrochemical reaction at the positive electrode causes the iron to dissolve.)

[0060] Negative electrode reaction 1: Fe 3+ +e→Fe 2+

[0061] (The catalyst on the cathode is reduced to its original state—an electrochemical reaction)

[0062] Negative electrode reaction 2: Fe 2+ +2e→Fe

[0063] (The catalyst on the cathode is reduced to its original state—an electrochemical reaction)

[0064] Note: Regardless of how the two ion-exchange membrane three-dimensional electrode devices, "anode section (anode region)" 2 and "cathode section (cathode region)" 8, are configured, the electrode will be a positive electrode when a positive current is applied and a negative electrode when a negative current is applied. Therefore, both three-dimensional electrodes will exhibit the two reactions mentioned above.

[0065] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics in the solutions is not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or its practicality.

Claims

1. A device for electrochemical degradation of oxidizing anions in polluted water using a working medium-filled ion-exchange membrane three-dimensional electrode, comprising three parts:

1. "cathode section (cathode zone)", 2. "polluted water treatment zone", and 3. "anode section (anode zone)", characterized in that: The "cathode section (cathode area)" is a complete cathode, which consists of a cathode plate, cathode filler (cathode working medium), cathode ion membrane plate, and cathode wire. The cathode section is separated from the polluted water treatment area and the anode area by the cathode ion membrane plate (as shown in Figure 1). Alternatively, the "cathode section (cathode area)" can be made into a standardized three-dimensional electrode, with the outer shell of the electrode being the cathode ion membrane plate. This three-dimensional cathode is separated from the polluted water treatment area and the anode area by the cathode ion membrane plate (as shown in Figure 2). The second, "polluted water treatment area," is used to introduce polluted water to be treated. The third point is that the "anode section (anode area)" of the device is a complete anode, which consists of an anode plate, an anode filler (anode working medium), an anode ion exchange membrane, and an anode wire. The anode section is separated from the polluted water treatment area and the cathode area by the anode ion exchange membrane (as shown in Figure 1). Alternatively, the "anode section (anode area)" can be made into a standardized three-dimensional electrode, with the outer shell of the electrode being the anode ion exchange membrane. This three-dimensional anode is separated from the polluted water treatment area and the cathode area by the anode ion exchange membrane (as shown in Figure 2). The "cathode ion exchange membrane plate" and "anode ion exchange membrane plate" described above are characterized in that: both the "cathode ion exchange membrane plate" and the "anode ion exchange membrane plate" are composed of ion exchange membranes and supporting mesh plates. The polarity of the ion exchange membranes in the membrane plates is set differently according to the different polluted waters being treated. When treating the toxic and harmful anions described in this invention, namely oxidizing anions in polluted water, in a set of electrolysis devices, the ion exchange membranes in the "cathode ion exchange membrane plate" and the "anode ion exchange membrane plate" are configured according to: "cathode" VS "anode" = "anion exchange membrane VS anion exchange membrane", that is: "-VS-", and both the cathode and the anode are made of anion exchange membranes. The "cathode filler (cathode working medium)" and "anode filler (anode working medium)" described above are characterized in that: the "cathode filler (cathode working medium)" and "anode filler (anode working medium)" are based on the properties of the polluted water to be treated according to the present invention (oxidizing anions in the polluted water), and the same substance is filled in both the cathode and anode regions, namely: a medium containing reducing cations. This medium can be an aqueous solution or an aqueous solution + solid particles, such as Fe. 2+ Aqueous solution and solid Fe particles.

2. This invention also discloses a method for electrochemically degrading oxidizing anions in polluted water using a working medium-filled ion-exchange membrane three-dimensional electrode, characterized in that: The device of this invention, "A device for electrochemical degradation of oxidizing anions in polluted water using a three-dimensional electrode with a working medium-filled ion-exchange membrane," employs the following water treatment method: An ion-exchange membrane is used to isolate cations while allowing toxic and harmful oxidizing anions in the polluted water to pass through. Simultaneously, toxic and harmful anions in the polluted water are degraded through electrolytic oxidation or reduction methods, in conjunction with the action of "cathode filler (cathode working medium)" and "anode filler (anode working medium)." Furthermore, the filling medium in the cathode and anode is electrolytically reduced by electrode reversal, restoring the reacted "cathode filler (cathode working medium)" and "anode filler (anode working medium)" to their original state, ultimately achieving the purpose of catalytic degradation.

3. A method for electrochemical degradation of oxidizing anions in polluted water using a working medium-filled ion-exchange membrane three-dimensional electrode according to claim 2, characterized in that: This method is used when treating oxidizing anions, such as ClO3. - ,ClO - ClO4 - …In its “device for electrochemical degradation of oxidizing anions in polluted water using a three-dimensional electrode with a working medium-filled ion-exchange membrane,” the ion exchange membranes in both the “anion exchange membrane plate” and the “cation exchange membrane plate” are anion exchange membranes, i.e., in the “-VS-” mode; and the “cathode filler (cathode working medium)” and the “anode filler (anode working medium)” are the same material, i.e., catalysts containing reducing cations, such as Fe, FeSO4, etc.

4. A method for electrochemical degradation of oxidizing anions in polluted water using a working medium-filled ion-exchange membrane three-dimensional electrode according to claim 2, characterized in that... The power supply method for treating oxidizing anions is as follows: A cathode and anode are switched continuously. During electrolysis, initially the anode is positively charged and the cathode is negatively charged. After a period of time, the anode is switched to negatively charged and the cathode to positively charged, and this cycle is repeated continuously. The negatively charged electrode can reduce oxidized catalysts, such as iron ions. The positively charged electrode can draw oxidizing anions from the polluted water into the ion-exchange membrane electrode to undergo redox reactions with the filling medium, thus degrading them. This alternating power supply continues until all toxic and harmful components in the polluted water are degraded. Finally, the catalyst is continuously oxidized by oxidizing anions and reduced by electrode reactions within the ion-exchange membrane electrode, resulting in minimal catalyst loss. The entire process is a simple electrocatalytic degradation process that only requires power. The specific reactions are as follows: When dealing with oxidizing anions: Positive electrode: Toxic X (n+1)- +M n+ →Non-toxic X n- +M (n+1)+ (The contaminants inside the ion-exchange membrane electrode react chemically with the catalyst in the filling medium) Negative electrode: M (n+1)+ +e=M n+ (The catalyst on the cathode is reduced to its original state—an electrochemical reaction).

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