TWI571326B - Composite metal oxide electrode structure and manufacturing method thereof - Google Patents

Description

Composite metal oxide electrode structure and manufacturing method thereof

The invention relates to a composite metal oxide electrode structure and a manufacturing method thereof for soil remediation; in particular to an iron-aluminum [Al/Fe] composite metal oxide electrode structure and a manufacturing method thereof; more particularly, a long-acting type [long] -acting] The composite metal oxide electrode structure and its manufacturing method are suitable for treating organic pollutants such as ibuprofen [Ibuprofen].

A novel patent for a conventional electric power soil remediation device, for example, a hollow water-permeable electrode rod structure of the environmental electric power technology of the Republic of China Patent No. M377425, which discloses a hollow water-permeable electrode rod structure comprising: an electric field device An electric field is generated in the soil in the predetermined area, and has a positive electrode and a negative electrode; at least two electrode rods are respectively disposed on each of the positive and negative electrodes, and the electrode rod has a hollow rod shape, and a center thereof forms a space in the axial direction, and The at least one perforation hole radially penetrated is a through hole that can connect the space to the outer diameter edge of the electrode rod; and each of the electrode rods is respectively disposed on each of the positive electrode and the negative electrode, and an anion in the soil when an electric field is generated Beginning to move toward the positive electrode; heavy metal cations and organic matter dissolved in water migrate toward the negative electrode and can penetrate into the space for concentration, which can be easily extracted by a withdrawal device to remove heavy metal contaminants in the space.

Another conventional electric power soil remediation device, for example, the system and method for rectifying heavy metal contaminated soil by the electric power of the Republic of China Patent No. I249441, which discloses an electrodynamic remediation system and method. The electrodynamic reaction tank is open, and sub-grooves of different widths can be placed in the electrodynamic reaction tank, and can be used as a soil sub-tank, a buffer sub-tank, an electrode area, and the like.

Another conventional electric power soil remediation device, for example, the Republic of China Patent No. I408258, the electric power method using a double metal oxide electrode regeneration system, the invention patent case, which discloses an electrodynamic method using a double metal oxide electrode for regeneration system. The regeneration system includes a power supply unit, a cathode, and an anode. The power supply unit is configured to supply electric power to remove the required power of the contaminants to the cathode and the anode. The cathode is electrically connected to the power supply device, and the cathode is connected to a first end of a component to be regenerated. The anode is electrically connected to the power supply device, and the anode is connected to a second end of the component to be regenerated to electrically remove contaminants from the component to be regenerated. The anode is a double metal oxide electrode such that the double metal oxide electrode undergoes contaminant degradation at the anode.

Another conventional electrodynamic soil remediation device, for example, the Republic of China Patent No. I280952, a method for improving the lead and copper content of soil [sludge], discloses an invention patent case, which discloses an improvement of soil (sludge) lead and copper content. The method can maintain pH neutrality and improve the efficiency of removing heavy metals from soil [sludge]. The anode and cathode electrodes are placed in the operating fluid storage tank, and are not in direct contact with the soil [sludge], and a DC voltage is applied to the treated soil [sludge].

Another conventional electrodynamic soil remediation device, such as the Republic of China Patent No. 293056, invented in situ remediation of contaminated heterogeneous soil, discloses an in situ remediation method for contaminated heterogeneous soil regions. The in-situ remedy method comprises [a] introducing a substance for treating pollutants in a bad area of the contaminated heterogeneous soil into at least one liquid permeable region of the contaminated heterogeneous soil region to form in the contaminated heterogeneous soil region. a treatment zone, [b] conducting a direct current through at least one low permeability soil zone in the contaminated heterogeneous soil zone, between the first electrode and having opposite charges Between the second electrodes, wherein [i] the first electrode is at the head end of the contaminated heterogeneous soil region, and the second electrode is at the opposite end of the contaminated heterogeneous soil region or [ii] the first electrode is at The first end of each low permeability soil region, and the second electrode position at the opposite end of each low permeability soil region, [1] to cause an electroosmotic flow from the second electrode to the first electrode, [2] Causing an electromigration movement of an ionic contaminant toward the opposite charge electrode, or [3] causing an electroosmotic flow from the second electrode to the first electrode and an electromigration movement of an ionic contaminant toward the opposite charge electrode, and c] Applying a water pressure drop across the contaminated heterogeneous soil region to create a water pressure flow from the high pressure end of the contaminated heterogeneous soil region to the low pressure end of the contaminated heterogeneous soil region.

In addition, regarding the conventional electrodynamic soil remediation technology, it is also disclosed in many foreign patents, for example, Chinese Patent Publication No. 102527707, U.S. Patent No. 6,193,867, and U.S. Patent Application Publication No. 2006163068. The above-mentioned patents and patent applications are merely for the purpose of the technical background of the present invention and are not intended to limit the scope of the present invention.

In fact, the aforementioned Republic of China Patent Nos. M377425, No. I249441, Chinese Patent Publication No. 102527707, and U.S. Patent No. 6,193,867 are only those which employ conventional inert electrodes for electrodynamic remediation of soil technology. However, the conventional inert electrode can only remove the contaminant portion, that is, it still has technical problems that cannot effectively perform overall soil remediation.

In addition, the aforementioned Republic of China Patent Publication No. I408258 employs a composite metal oxide electrode, that is, an improved double metal oxide electrode and a regeneration system thereof. However, many composite metal electrodes are typically made of precious metals, so they still have the technical premise that manufacturing costs are relatively expensive and less economical.

In addition, the aforementioned Republic of China Patent Notice No. I280952 The method for improving the lead and copper content of soil [sludge] and the remedy for contaminated heterogeneous soil area No. 293056 are only general repair techniques for contaminated soil, and there are still technologies that cannot effectively remediate the soil. problem.

In view of the above, in order to meet the above technical problems and needs, the present invention provides a composite metal oxide electrode structure, a method for the same, and a method for manufacturing the same, wherein a composite metal layer is disposed on an oxidation electrode, and the composite metal layer is provided. And comprising a first metal material and a second metal material, and utilizing the oxidation-reduction potential of the first metal material and the second metal material to appropriately generate a spontaneous reaction, so that the first metal material (for example, aluminum or aluminum-containing material) An electron can be supplied to reduce the oxidation of the second metal material to form a zero-valent second metal (for example, iron or a ferrous material), and then perform a Fenton reaction in water, thereby comparing the conventional electrodynamic soil remediation device The electrode greatly enhances the efficiency of soil remediation and reduces the cost of soil remediation.

The main object of the preferred embodiment of the present invention is to provide a composite metal oxide electrode structure for use in a soil remediation method and a method for fabricating the same, wherein a composite metal layer is disposed on an oxidation electrode, and the composite metal layer comprises a first metal a material and a second metal material, and utilizing the oxidation-reduction potential of the first metal material and the second metal material to appropriately generate a spontaneous reaction, so that the first metal material (for example, aluminum or an aluminum-containing material) can supply electrons to The second metal of the second metal material is reduced to form a zero-valent second metal (for example, iron or a ferrous material), and then subjected to a Fenton reaction in water to achieve soil remediation efficiency and reduce soil remediation costs.

In order to achieve the above object, a composite metal oxide electrode according to a preferred embodiment of the present invention is used for a soil remediation method comprising: forming a metal oxide electrode from a first metal material and a second metal material; The metal oxide electrode is formed as an anode, and the metal oxide electrode is used for electrodynamic soil remediation; in the electrodynamic soil remediation, a spontaneous reaction is appropriately generated by using the redox potential of the first metal material and the second metal material So that the first metal material can supply electrons, so that the second metal of the second metal material is reduced to form a zero-valent second metal; and the Fenton reaction is further performed in water to degrade or mineralize an organic pollutant. .

In the preferred embodiment of the invention, the metal oxide electrode is a cylinder or a flat cylinder.

In a preferred embodiment of the invention, the first metal material is disposed on an electrode core layer, and the second metal material is disposed on an electrode outer layer.

In a preferred embodiment of the invention, the first metallic material is selected from the group consisting of aluminum or an aluminum containing material, and the second metallic material is selected from the group consisting of iron or ferrous materials.

In order to achieve the above object, a composite metal oxide electrode structure according to a preferred embodiment of the present invention comprises: a metal oxide electrode which is an anode, and the metal oxide electrode is used for electrodynamic soil remediation; an electrode core layer, which is composed of a metal material; and an electrode outer layer, which is made of a second metal material, and the electrode outer layer is disposed on the electrode core layer; wherein the electrode core layer and the electrode outer layer constitute the metal oxide electrode, and the The redox potential of the first metal material and the second metal material appropriately generates a spontaneous reaction, so that the first metal material can supply electrons, so that the second metal of the second metal material is reduced to form a zero-valent second metal, and then The Fenton reaction is carried out in water to degrade or mineralize an organic contaminant.

In the preferred embodiment of the invention, the metal oxide electrode is a cylinder or a flat cylinder.

In the preferred embodiment of the invention, the cylinder or the flat cylinder constitutes an electrode array.

In a preferred embodiment of the invention, the first metallic material is selected from the group consisting of aluminum or an aluminum containing material, and the second metallic material is selected from the group consisting of iron or ferrous materials.

In the preferred embodiment of the invention, the outer layer of the electrode is a composite second metal layer, and the composite second metal layer comprises a plurality of second metal layers.

In order to achieve the above object, a composite metal oxide electrode manufacturing method according to a preferred embodiment of the present invention comprises: pickling at least one first metal rod, and taking out the first metal rod; immersing the first metal rod in a second a metal ion solution, and taking out the first metal rod; pre-baking the first metal rod; and subjecting the first metal rod to high temperature baking and calcining to form at least one second on the first metal rod Metal layer.

In a preferred embodiment of the invention, the first metal is selected from the group consisting of aluminum or an aluminum-containing material, and the second metal is selected from the group consisting of iron or a ferrous material.

In a preferred embodiment of the invention, another second metal layer is formed in the second metal layer to form a composite second metal layer.

1‧‧‧Metal Oxidation Electrode

1'‧‧‧Metal Oxidation Electrode

10‧‧‧electrode core

20‧‧‧ electrode outer layer

Fig. 1 is a schematic view showing the flow of a composite metal oxide electrode according to a preferred embodiment of the present invention for a soil remediation method.

Fig. 2 is a perspective view showing the structure of a composite metal oxide electrode according to a first preferred embodiment of the present invention.

Fig. 3 is a view showing the state of electron conduction in the case of performing a redox reaction in the composite metal oxide electrode structure of the first preferred embodiment of the present invention.

Fig. 4 is a perspective view showing the structure of a composite metal oxide electrode according to a second preferred embodiment of the present invention.

Fig. 5 is a perspective view showing the configuration of an electrode array of a composite metal oxide electrode according to a second preferred embodiment of the present invention.

Figure 6 is a schematic view showing the mechanism of degradation of organic matter in a composite metal oxide electrode according to a preferred embodiment of the present invention in a Cl ^- free environment.

Figure 7 is a schematic view showing the mechanism of degradation of organic matter in a composite metal oxide electrode according to a preferred embodiment of the present invention in a Cl ^- containing environment.

Figure 8 is a flow chart showing a method of manufacturing a composite metal oxide electrode according to a preferred embodiment of the present invention.

In order to fully understand the present invention, the preferred embodiments of the present invention are described in detail below, and are not intended to limit the invention.

The composite metal oxide electrode structure of the preferred embodiment of the present invention and the method for the soil remediation are applicable to various electrodynamic soil (sludge) remediation devices, for example, an electro-dynamic soil site in-situ remediation device, but it is not used To limit the scope of the invention. In addition, the composite metal oxide electrode structure of the preferred embodiment of the present invention, the manufacturing method thereof and the method for the soil remediation are suitable for remediation of pollutants as various organic pollutants, but it is not limited thereto. The scope of application of the present invention.

In general, organic pollutants, when organic compounds enter the environment, can cause environmental pollution incidents or human events. Organic pollutants are generally classified into natural organic pollutants and synthetic organic pollutants according to their sources. Natural organic pollutants are mainly organic compounds that are harmful to human health and pollute the environment caused by natural chemical reactions or biological metabolism, such as aflatoxin, terpenes, urethane and the like. Synthetic organic pollutants are various organic compounds produced by modern industries, such as dyes, detergents, organic pesticides, plastics, phenols, cyanides, petroleum, synthetic detergents, etc.

1 is a schematic flow chart showing a method for using a composite metal oxide electrode for soil remediation according to a preferred embodiment of the present invention, which comprises substantially four steps. However, it is not intended to limit the scope of the invention. Referring to FIG. 1 , a composite metal oxide electrode for use in a soil remediation method according to a preferred embodiment of the present invention includes a first step S1: first, a metal oxide electrode is selected from a first metal material and a second metal material. production. For example, the metal oxide electrode can be selected into various shapes, and the metal oxide electrode can be selected into various structures, for example, alternating layers or concentric strips of the first metal layer and the second metal layer. body. The first metal material is selected from aluminum [Al] or an aluminum-containing material, and the second metal material is selected from iron [Fe] or an iron-containing material to form an Fe/Al composite metal oxide electrode.

Referring to FIG. 1 again, the composite metal oxide electrode according to the preferred embodiment of the present invention is used in a soil remediation method comprising a second step S2: then, using the metal oxide electrode to form an anode or a positive electrode, and The metal oxide electrode is used for electrodynamic soil remediation. For example, the anode of the metal oxide electrode corresponds to a cathode or a negative electrode to form an electrodynamic soil remediation system, and the cathode is made of other metals such as stainless steel.

Referring to FIG. 1 again, the composite metal oxide electrode of the preferred embodiment of the present invention is used in a soil remediation method comprising a third step S3: then, in the electrodynamic soil remediation, the first metal is utilized on the anode The redox potential of the material and the second metal material suitably generates a spontaneous reaction such that the first metal material can supply electrons [e ^- ] to facilitate oxidation of the second metal material to the second metal [eg, oxidation Iron] is reduced to form a zero-valent second metal.

Referring to FIG. 1 again, the composite metal oxide electrode of the preferred embodiment of the present invention is used in a soil remediation method comprising a fourth step S4: followed by a Fenton reaction in water for degradation (attenuation). Or mineralization of an organic pollutant. Most of these organic pollutants can be degraded into simple inorganic substances in the environment, and their degradation forms products that are harmless to the human body.

Referring to FIG. 1 again, the present invention utilizes an oxidative degradation mechanism to include a hydroxyl radical generated by an electrode and a high oxide (eg, OCl ⁻ ) produced by an operating fluid. For example, the present invention utilizes a Fenton reaction to generate hydroxyl radicals and utilizes hydroxyl radicals to generate redox reactions with organic pollutants to degrade or mineralize contaminants. The invention utilizes OCl ^- with high oxidizing ability anion to degrade organic pollutants, and its oxidation-reduction potential is as follows: 2Al ⁰ → 2Al ³⁺ + 6e ^- △ E = +1.66v

3Fe ²⁺ +6e ^- →3Fe ⁰ △E=+0.33v

2Al ⁰ +3Fe ²⁺ →2Al ³⁺ +3Fe ⁰ ↓ △E=+1.99v

Fig. 2 is a perspective view showing the structure of a composite metal oxide electrode according to a first preferred embodiment of the present invention. Referring to FIG. 2, the composite metal oxide electrode structure of the preferred embodiment of the present invention comprises a metal oxide electrode 1, an electrode core 10 and an electrode shell layer 20, and the electrode The core layer 10 is made of the first metal material, and the electrode outer layer 20 is made of the second metal material. That is, the first metal material is disposed on the electrode core layer 10, and the second metal material is disposed on the electrode outer layer 20.

Referring to FIG. 2 again, for example, the metal oxide electrode 1 is a cylinder or an elongated rod, for example, a polygonal section elongated body or a gear shape. The electrode strip outer layer 20 is correspondingly disposed on the electrode core layer 10 to form a redox reaction region between the electrode core layer 10 and the electrode outer layer 20.

Fig. 3 is a view showing the state of electron conduction of the composite metal oxide electrode structure of the first preferred embodiment of the present invention in the redox reaction, which corresponds to Fig. 2. Referring to FIGS. 2 and 3, the electrode core layer 10 and the electrode outer layer 20 constitute the metal oxide electrode 1, and the spontaneous reaction is appropriately generated by the oxidation-reduction potential of the first metal material and the second metal material, so that the first A metal material can supply electrons [e ^- ] as indicated by the direction of the arrow in Fig. 3, so that the second metal of the second metal material is reduced to form a zero-valent second metal, and then the Fenton reaction is carried out in water. Degrading or mineralizing an organic pollutant.

Fig. 4 is a perspective view showing the structure of a composite metal oxide electrode according to a second preferred embodiment of the present invention, which corresponds to Fig. 2. Referring to FIG. 4, the metal oxide electrode 1' of the second preferred embodiment of the present invention comprises an electrode core layer 10 and an electrode outer layer 20, and the metal oxide electrode 1' is a first embodiment. A flat cylinder is formed to increase a redox reaction region between the electrode core layer 10 and the electrode outer layer 20.

Fig. 5 is a perspective view showing the composite electrode array of the composite metal oxide electrode according to the second preferred embodiment of the present invention, which corresponds to Fig. 4. Referring to FIG. 5, a plurality of the metal oxide electrodes 1' are selected to form a flat cylindrical electrode array at a predetermined arrangement pitch, so as to configure different numbers of the metal oxide electrodes 1' according to different requirements, and can be accommodated. In an electrodynamic soil site remediation device or an electrodynamic soil remediation tank.

Referring to FIGS. 2 and 5 again, in the same manner, a plurality of the metal oxide electrodes 1 are selected to form a cylindrical electrode array at a predetermined arrangement pitch, and the cylindrical electrode array or the flat cylindrical electrode array may be selectively arranged. An array of electrodes of various shapes is formed. Alternatively, another preferred embodiment of the present invention may optionally combine a plurality of the metal oxide electrodes 1 and a plurality of the metal oxide electrodes 1' to form a hybrid electrode array.

Figure 6 is a schematic view showing the mechanism of degradation of organic matter in a composite metal oxide electrode according to a preferred embodiment of the present invention in a Cl-free environment. Please refer to Figure 6, for example, the treatment mechanism of electrochemical liquid phase degradation in the absence of chlorine, the main mechanism of its degradation comes from the Fe / Al composite metal oxide electrode itself, due to the generation of hydroxyl radicals The pollutants can be degraded as follows: at the anode 2H ₂ O ₂ →O ₂ (g)+4H ⁺ +4e ^-

At the cathode 2H ₂ O ₂ +2e ^- → H ₂ (g) ↑ + 2OH ^-

2Al ⁰ →2Al ³⁺ +6e ^-

Fe ³⁺ +e ^- →Fe ²⁺

3Fe ²⁺ +6e ^- →3Fe ⁰

(O ₂ ) _ads +e ^- →O ^2- . or HO ₂ .

HO ₂ . +HO ₂ . →H ₂ O ₂ +O ₂

O ^2- .+O ^2- .+2H ⁺ →H ₂ O ₂ +O ₂

3Fe ²⁺ +6e ^- →3Fe ⁰

Fe ²⁺ +H ₂ O ₂ →HO.+OH ^- +Fe ³⁺

Fe ³⁺ + H ₂ O ₂ → HO ₂ .

Organic matter + HO. → Degradation compound

Fig. 7 is a view showing the mechanism of degradation of organic matter by a composite metal oxide electrode in a Cl-containing environment according to a preferred embodiment of the present invention, which corresponds to Fig. 6. Please refer to Figure 7. For example, the treatment mechanism of electrochemical liquid phase degradation in the chlorine-containing environment, the main mechanism of its degradation comes from the Fe/Al composite metal oxide electrode itself, due to the generation of hydroxyl radicals. Degrading contaminants, and also producing OCl ^- with high oxidizing ability to degrade organic pollutants as follows: 2Cl ^- → Cl ₂ + 2e ^-

2e ^- +2H ₂ O→2OH ^- +H ₂

2OH ^- +Cl ₂ →Cl ^- +OCl ^- +2H ₂ O

Figure 8 is a flow chart showing a method of manufacturing a composite metal oxide electrode according to a preferred embodiment of the present invention. Referring to FIG. 8, the method for manufacturing a composite metal oxide electrode according to a preferred embodiment of the present invention comprises a first step S1: first, at least one first metal rod (for example, an aluminum rod having a diameter of 5 mm and a length of 10 cm) The acid is washed with an acidic solution (for example, a diluted sulfuric acid solution) for a predetermined time (for example, about 6 minutes), and the first metal rod is taken out.

Referring to FIG. 8 again, the method for manufacturing a composite metal oxide electrode according to a preferred embodiment of the present invention comprises a second step S2: subsequently, immersing the first metal rod in a second metal ion solution (for example, a concentration of about 1.7) The FeCl ₃ solution of M is taken for a predetermined time, and the impregnated first metal rod is taken out.

Referring to FIG. 8 again, the method for manufacturing a composite metal oxide electrode according to a preferred embodiment of the present invention comprises a third step S3: subsequently, the impregnated first metal rod is pre-baked at a predetermined temperature [about 105 ° C]. Dry for a predetermined time (for example: about 10 minutes) to obtain the dried first metal rod.

Referring to FIG. 8 again, the method for manufacturing a composite metal oxide electrode according to a preferred embodiment of the present invention comprises a fourth step S4: subsequently, drying the first metal rod at a predetermined temperature [about 500 to 600 ° C] The high temperature baking is performed for a predetermined time (for example, about 1 to 10 minutes) to form at least one second metal layer on the first metal rod. In another preferred embodiment of the present invention, the first metal bar may be subjected to a final high temperature baking and calcination at a predetermined temperature [about 500 to 600 ° C] for a predetermined time (for example, about 60 minutes).

Alternatively, another preferred embodiment of the present invention may optionally repeat the first step S1 to the fourth step S4 several times (for example, 10 times). Another second metal layer is formed on the second metal layer to form a composite second metal layer. Finally, the first metal bar may be subjected to a final high temperature baking and calcination at a predetermined temperature [about 500 to 600 ° C] for a predetermined time (for example, about 60 minutes). As such, the electrode outer layer 20 is a composite second metal layer, and the composite second metal layer includes a plurality of second metal layers, as shown in FIGS. 2 and 4.

The foregoing preferred embodiments are merely illustrative of the invention and the technical features thereof, and the techniques of the embodiments can be carried out with various substantial equivalent modifications and/or alternatives; therefore, the scope of the invention is subject to the appended claims. The scope defined by the scope shall prevail. The copyright limitation of this case is used for the purpose of patent application in the Republic of China.

1‧‧‧Metal Oxidation Electrode

10‧‧‧electrode core

20‧‧‧ electrode outer layer

Claims (10)

A composite metal oxide electrode for use in a soil remediation method, comprising: forming a metal oxidation electrode from a first metal material and a second metal material; forming an anode by using the metal oxidation electrode, and using the metal oxidation electrode In the electrodynamic soil remediation; when the electrodynamic soil remediation is performed by the electrochemical liquid phase degradation treatment mechanism, the spontaneous reaction of the first metal material and the second metal material is appropriately generated, so that the first metal material can be Supplying electrons to facilitate oxidation of the second metal of the second metal material to form a zero-valent second metal; and further performing a Fenton reaction in the water to degrade or mineralize an organic contaminant. The composite metal oxide electrode according to claim 1 is used for a soil remediation method, wherein the metal oxidation electrode is a cylinder or a flat cylinder. The composite metal oxide electrode according to claim 1 is used for a soil remediation method, wherein the first metal material is disposed on an electrode core layer, and the second metal material is disposed on an electrode outer layer. The composite metal oxide electrode according to claim 1 is used for a soil remediation method, wherein the first metal material is selected from aluminum or an aluminum-containing material, and the second metal material is selected from iron or a ferrous material. A composite metal oxide electrode structure comprising: a metal oxidation electrode, which is an anode, and the metal oxidation electrode is used for electrodynamic soil remediation by an electrochemical liquid phase degradation treatment mechanism; an electrode core layer a metal material; and an electrode outer layer, which is made of a second metal material, and the electrode outer layer is disposed on the electrode core layer; wherein the electrode core layer and the electrode outer layer constitute the metal oxide electrode, and the The oxidation-reduction potential of the first metal material and the second metal material is appropriately produced Producing a spontaneous reaction so that the first metal material can supply electrons, so that the second metal of the second metal material is reduced to form a zero-valent second metal, and then subjected to a Fenton reaction in water for degradation or mineralization. Organic Pollutants. The composite metal oxide electrode structure according to claim 5, wherein the metal oxide electrode is a cylinder, a cylindrical electrode array, a flat cylinder or a flat cylindrical electrode array. The composite metal oxide electrode construction of claim 5, wherein the first metal material is selected from the group consisting of aluminum or an aluminum-containing material, and the second metal material is selected from the group consisting of iron or a ferrous material. The composite metal oxide electrode structure according to claim 5, wherein the outer layer of the electrode is a composite second metal layer, and the composite second metal layer comprises a plurality of second metal layers. A method for manufacturing a composite metal oxide electrode, comprising: pickling at least one first metal rod, and taking out the first metal rod; immersing the first metal rod in a second metal ion solution, and taking out the first a metal rod; pre-baking the first metal rod; and baking the first metal rod at a high temperature to form at least a second metal layer on the first metal rod; or, in the second metal layer Another second metal layer is formed to form a composite second metal layer to form a composite metal oxide electrode, wherein the composite metal oxide electrode is used for electrodynamic soil remediation using an electrochemical liquid phase degradation treatment mechanism. The method for producing a composite metal oxide electrode according to claim 9, wherein the first metal is selected from aluminum or an aluminum-containing material, and the second metal is selected from iron or a ferrous material.