Device and method for extracting self-generating materials and coordinating in-situ conversion of wastewater

Abstract

The present invention is applicable to the field of spontaneous chemical power generation technology and provides a device and method for extracting self-generating materials and coordinating the in-situ conversion of wastewater. The device includes a device body, which includes an anode chamber and a cathode chamber, with an intermediate wastewater chamber between the anode and cathode chambers. The anode chamber provides an electron flow to the cathode of the cathode chamber through an anodic oxidation reaction, thereby driving the reduction process of the metal in the cathode chamber. During this process, the anode chamber produces minerals in situ and simultaneously purifies the wastewater in the intermediate wastewater chamber. The present invention solves the energy consumption problem of the wastewater purification process and can also obtain resource materials such as uranium. It has low usage requirements and is environmentally friendly, has the advantages of sustainable utilization, and has a wide range of applications.

Description

Technical Field

[0001] The present invention belongs to the technical field of spontaneous chemical electricity generation, and in particular relates to a device and method for extracting spontaneous electricity-generating substances and coordinating in-situ conversion of wastewater. Background Art

[0002] Physical and chemical adsorption is a commonly used technique for treating uranium-containing wastewater, but its efficiency is limited by the saturation of adsorption sites and Coulombic repulsion. Recent studies have shown that direct current can reduce adsorbed U(VI) species and avoid Coulombic repulsion, thereby improving extraction efficiency. However, this method is energy-intensive. Another feasible approach is the reduction of hexavalent uranium (U(VI)) to tetravalent uranium (U(IV)). Zero-valent iron (ZVI) has attracted attention due to its affordability and availability. In the ZVI-driven uranium extraction process, soluble U(VI) is first adsorbed onto the ZVI surface and then reduced to a slightly soluble U(IV) precipitate. However, nanoscale zero-valent iron (nZVI) materials suffer from high separation costs, easy oxidation, and aggregation in complex water bodies, which reduces their long-term reactivity.

[0003] Based on the above challenges, an innovative self-generated electrochemical method is needed to convert chemical energy into electrical energy, using the potential difference generated by the redox reaction to power wastewater purification. At the same time, it can also recover uranium resources and generate violet iron ore in situ (violet iron ore has a wide range of uses and can play a role in agriculture, industry, environmental protection, medical care and other fields). This method not only improves uranium recovery efficiency, but also reduces dependence on traditional uranium resources, while also reducing energy consumption and environmental impact during wastewater treatment. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for extracting self-generating materials and coordinating in-situ conversion of wastewater, aiming to solve the problems mentioned in the above background technology.

[0005] The present invention is achieved by providing a device for extracting self-generated materials and coordinating in-situ conversion of wastewater, comprising a device body, the device body including an anode chamber and a cathode chamber, with an intermediate wastewater chamber between the anode chamber and the cathode chamber. The anode chamber provides an electron flow to the cathode of the cathode chamber through an anodic oxidation reaction, thereby driving the reduction process of the metal in the cathode chamber. During this process, the anode chamber produces minerals in situ, while purifying the wastewater in the intermediate wastewater chamber.

[0006] An anion exchange membrane is provided between the intermediate wastewater chamber and the anode chamber, and a cation exchange membrane is provided between the intermediate wastewater chamber and the cathode chamber;

[0007] The anode chamber is further provided with a mineral outlet and a reaction liquid inlet; the cathode chamber is further provided with a reduced metal outlet and a metal-containing wastewater inlet.

[0008] A further technical solution is that the reaction liquid inlet of the anode chamber is input with sulfuric acid; the anode material of the anode chamber is iron; the cathode material of the cathode chamber is U(VI); the wastewater in the intermediate wastewater chamber is phosphorus-containing wastewater; the oxidation reaction of Fe to Fe(II) in the anode chamber provides an electron flow to the cathode of the cathode chamber, thereby driving the reduction of U(VI) to U(IV) in the cathode chamber, and the phosphate ions in the intermediate wastewater chamber pass through the anion exchange membrane and react with Fe(II) to generate violet iron ore in situ.

[0009] In a further technical solution, sulfuric acid is input into the reaction liquid inlet of the anode chamber; the anode material of the anode chamber is iron; the wastewater in the intermediate wastewater chamber is lithium-containing wastewater; the cathode material of the cathode chamber is copper; the oxidation reaction of Fe to Fe (II) in the anode chamber provides an electron flow to the cathode of the cathode chamber, and the lithium ions in the intermediate wastewater chamber enter the cathode chamber through the cation exchange membrane to generate lithium hydroxide under alkaline conditions.

[0010] In a further technical solution, sulfuric acid is input into the reaction liquid inlet of the anode chamber; the anode material of the anode chamber is iron; the cathode material of the cathode chamber is U(VI); the wastewater in the intermediate wastewater chamber is fluorine-containing wastewater; the oxidation reaction of Fe to Fe(II) in the anode chamber provides an electron flow to the cathode of the cathode chamber, thereby driving the reduction of U(VI) to U(IV) in the cathode chamber; a calcium chloride solution is also added to the anode chamber, and the fluoride ions in the intermediate wastewater chamber react with the calcium chloride solution through an anion exchange membrane to form a calcium fluoride precipitate.

[0011] A further technical solution is that sulfuric acid is input into the reaction liquid inlet of the anode chamber; the anode material of the anode chamber is iron; the cathode material of the cathode chamber is Cu(II); the wastewater in the intermediate wastewater chamber is phosphorus-containing wastewater; a calcium chloride solution is also added to the anode chamber, and a CuSO4 solution is also added to the cathode chamber, and the oxidation reaction of iron provides an electron flow to the cathode of the cathode chamber, thereby driving the reduction of Cu(II) to Cu in the cathode chamber; the phosphate ions in the intermediate wastewater chamber pass through the anion exchange membrane and react with the calcium chloride solution to generate hydroxyapatite.

[0012] Another object of the present invention is to provide a method for self-generating chemical uranium extraction and coordinated in-situ conversion of phosphorus wastewater, which uses the above-mentioned device for self-generating material extraction and coordinated in-situ conversion of wastewater to convert chemical energy into electrical energy, and uses the potential difference generated by the redox reaction to power the device, drive wastewater purification treatment, and simultaneously recover metals and other substances.

[0013] The present invention provides a device and method for extracting self-generating substances and coordinating in-situ conversion of wastewater, which has the following beneficial effects:

[0014] It can solve the energy consumption problem in the wastewater purification process and obtain resource materials such as uranium, which have low usage requirements, are environmentally friendly, and have the advantage of sustainable utilization. The wastewater purification method adopted is suitable for treating wastewater containing phosphorus, lithium or fluorine, and can be extended to the implementation in the fields of seawater desalination, nuclear wastewater treatment, sewage treatment, etc., and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a device for extracting self-generated materials and coordinating in-situ conversion of wastewater provided in an embodiment of the present invention;

[0016] Figure 2 Schematic diagram of current response with different parallel numbers;

[0017] Figure 3 Schematic diagram of the change of uranium concentration over time under different parallel numbers;

[0018] Figure 4 Schematic diagram of the change of phosphorus concentration over time under different parallel numbers;

[0019] Figure 5 Schematic diagram of the changes of (a) phosphorus concentration, (b) phosphorus removal rate, (c) uranium concentration, and (d) uranium adsorption capacity over time at different uranium concentrations;

[0020] Figure 6 It is a schematic diagram of the parallel structure.

[0021] In the figure: 1-anion exchange membrane, 2-cation exchange membrane, 3-anode, 4-cathode, 5-reduced metal outlet, 6-metal-containing wastewater inlet, 7-mineral outlet, 8-reaction liquid inlet. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0024] like Figure 1As shown, a device for extracting self-generating materials and coordinating in-situ conversion of wastewater provided by an embodiment of the present invention includes a device body, wherein the device body includes an anode chamber and a cathode chamber, and an intermediate wastewater chamber is between the anode chamber and the cathode chamber; the anode chamber provides an electron flow to the cathode 4 of the cathode chamber through the anode 3 oxidation reaction, thereby driving the reduction process of the cathode chamber metal; in this process, the anode chamber produces minerals in situ, and at the same time, the wastewater in the intermediate wastewater chamber is purified.

[0025] Among them, an anion exchange membrane 1 is installed between the intermediate wastewater chamber and the anode chamber, and a cation exchange membrane 2 is installed between the intermediate wastewater chamber and the cathode chamber. The anode chamber is also provided with a mineral outlet 7 and a reaction liquid inlet 8; the cathode chamber is also provided with a reduced metal outlet 5 and a metal-containing wastewater inlet 6. It is understood that the device body can be arranged as needed to form three chambers with anion and cation membranes (i.e., the aforementioned anode chamber, intermediate wastewater chamber, and cathode chamber) or two chambers (anode chamber and cathode chamber, with a single ion exchange membrane arranged between the anode and cathode chambers).

[0026] like Figure 1 As shown, an embodiment of the present invention also provides a method for self-generating chemical uranium extraction and coordinated in-situ conversion of phosphorus wastewater, which is carried out using the above-mentioned device for self-generating material extraction and coordinated in-situ conversion of wastewater, converts chemical energy into electrical energy, and uses the potential difference generated by the redox reaction to power the device, drive the wastewater purification process, and recover metals and other substances at the same time.

[0027] This method generates stable electrical energy output through the oxidation of metals such as iron, driving the recovery of cathode uranium, copper, etc. The entire process does not require additional energy input and achieves net electricity production.

[0028] The chamber is separated and specific pollutants can be selectively treated by controlling the electrode potential and electrode material.

[0029] An oxygen-deficient environment is created in the anode chamber, and acidic conditions are provided by sulfuric acid, hydrochloric acid, etc. Iron, zinc, magnesium, etc. serve as the anode 3, reacting with phosphate, fluoride ions, etc. passing through the anion exchange membrane 1 to produce blue iron ore, calcium fluoride, etc. in situ.

[0030] The intermediate wastewater chamber can be added with one of the wastewater containing phosphorus, lithium or fluorine. The ions can generate blue iron ore or calcium fluoride in situ at the anode through the anion exchange membrane 1, or generate lithium hydroxide, lithium carbonate, etc. at the cathode 4 through the cation exchange membrane 2.

[0031] The device is provided with an electrolyte inlet and a product outlet. As the reaction at the anode 3 proceeds, the acid is consumed and the pH value increases, which is conducive to the formation of violet iron ore (the pH value of the violet iron ore formation environment is usually between 6 and 9).

[0032] Cathode 4 uses materials such as uranium (VI) and copper. Alkaline conditions can be provided by sodium hydroxide, sodium carbonate, and other materials. Cations pass through cation exchange membrane 2 and enter cathode 3, producing lithium hydroxide, lithium carbonate, and other materials. Simultaneously, cathode 4 also produces resource materials such as uranium and copper.

[0033] The cathode and anode reactions are clearly observed. In this device, the anode 3 where the iron is located produces light blue iron ore, and the cathode 4 produces yellow uranium (IV) deposits.

[0034] The circuit connection mode of the device can be series connection, parallel connection or mixed connection, which is conducive to the implementation of the method.

[0035] This method can treat wastewater containing phosphorus, lithium, fluorine, etc., and can be extended to the implementation of seawater desalination, nuclear wastewater treatment, sewage treatment and other fields.

[0036] Example 1

[0037] like Figure 1-6 As shown, a method for self-generated electrochemical uranium extraction and coordinated in-situ conversion of phosphorus wastewater drives wastewater purification and simultaneously recovers uranium and blue iron ore, using a three-chamber battery device with anion and cation membranes.

[0038] (I) Anode chamber

[0039] 1. Set the size to 10cm 2 Soak the iron sheet in dilute acid to remove the surface oxide film, and then rinse with distilled water;

[0040] 2. Create an oxygen-deficient environment in the anode chamber and fill it with nitrogen for 5 to 10 minutes to prevent iron from being oxidized by air;

[0041] 3. A reaction liquid inlet 8 (i.e., electrolyte inlet) is provided in the anode chamber of the device, and H2SO4 solution with a specified pH value is filled into the anode chamber (a peristaltic pump is used to circulate the H2SO4 solution).

[0042] 4. The concentration used is 5X10 -5 mol / L sulfuric acid (pH=3) is added to the anode chamber to provide an acidic environment, reacting with iron to produce Fe(II). The acid is consumed and the pH value increases from 3 to 6.

[0043] 5. Add anion exchange membrane 1 between the anode chamber and the intermediate wastewater chamber;

[0044] 6. Oxidation of Fe to Fe(II) occurs in the anode chamber providing electron flow through an external circuit to the cathode 4 driving the reduction of U(VI) to U(IV). Fe to Fe(II) E0 = 0.440 V vs. SHE;

[0045] 7. The phosphorus-containing wastewater added to the intermediate wastewater chamber, phosphate ions pass through the anion exchange membrane 1, react with Fe (II), and generate violet iron ore in situ under the condition of pH 6 (favorable for the formation of violet iron ore).

[0046] 8. A product outlet (i.e., mineral outlet 7) is provided in the anode chamber of the device to separate the generated light blue violet iron ore in time, which is conducive to the reaction proceeding in the direction of generating violet iron ore.

[0047] (II) Intermediate wastewater chamber

[0048] 1. Add phosphorus-containing wastewater (phosphorus concentration: 100 mg / L);

[0049] 2. Phosphorus-containing anions such as phosphate in the wastewater enter the anode chamber through the anion exchange membrane 1 and react with Fe(II) to form cyanite in situ;

[0050] 3. The dephosphorization wastewater undergoes biological treatment to decompose the organic pollutants in the wastewater, and then uses membrane separation technology (ultrafiltration and reverse osmosis) to obtain pure water.

[0051] (III) Cathode chamber

[0052] 1. Add U(VI) (concentration: 50 mg / L) as cathode 4;

[0053] 2. Add a cation exchange membrane 2 in the cathode chamber and the intermediate wastewater chamber;

[0054] 3. Oxidation of Fe to Fe(II) occurs by providing an electron flow through an external circuit to cathode 4, driving the reduction of U(VI) to U(IV) (E0 = 0.327 V vs. SHE), reducing the harmful U and producing uranium (U(IV)), a resource material.

[0055] (IV) Assembly method of the device

[0056] 1. The parallel connection method is adopted to increase the current. The increase of current is beneficial to the operation of the device. The measured blue iron ore generation rate and content, wastewater phosphorus removal rate, and uranium output rate are significantly improved.

[0057] 2. Cut the anion and cation exchange membrane into the same size as the mold, and punch several small holes on its surface so that the screws for fixing the device and the wastewater solution can pass through smoothly.

[0058] 3. Before assembly, rinse the anion and cation exchange membranes with deionized water several times and soak them in deionized water respectively. After cleaning, store them in the solution. The screws and joints of the assembly mold are tightly wrapped with raw tape to prevent water leakage and short circuit.

[0059] Example 2

[0060] like Figure 1 and 6 As shown, a method for self-generated electrochemical uranium extraction and coordinated in-situ conversion of phosphorus wastewater drives wastewater purification and recovery of lithium hydroxide, using a three-chamber battery device with anion and cation membranes.

[0061] (I) Anode chamber

[0062] 1. Set the size to 10cm 2 Soak the iron sheet in dilute acid to remove the surface oxide film, and then rinse with distilled water;

[0063] 2. Create an oxygen-deficient environment in the anode chamber and fill it with nitrogen for 5 to 10 minutes to prevent iron from being oxidized by air;

[0064] 3. A reaction liquid inlet 8 (i.e., electrolyte inlet) is provided in the anode chamber of the device, and H2SO4 solution with a specified pH value is filled into the anode chamber (a peristaltic pump is used to circulate the H2SO4 solution).

[0065] 4. The concentration used is 5X10 -5 mol / L sulfuric acid (pH=3) is added to the anode chamber to provide an acidic environment, reacting with iron to produce Fe(II);

[0066] 5. Add anion exchange membrane 1 between the anode chamber and the intermediate wastewater chamber;

[0067] 6. Oxidation of Fe to Fe(II) occurs in the anode chamber providing electron flow through an external circuit to the cathode 4.

[0068] (II) Intermediate wastewater chamber

[0069] 1. Add lithium-containing wastewater (Li concentration: 100 mg / L);

[0070] 2. The lithium ions in the wastewater enter the cathode chamber through the cation exchange membrane 2 and generate lithium hydroxide under alkaline conditions;

[0071] 3. The lithium-removed wastewater undergoes biological treatment to decompose the organic pollutants in the wastewater, and then undergoes membrane separation technology (ultrafiltration and reverse osmosis) to obtain pure water.

[0072] (III) Cathode chamber

[0073] 1. The size of the product is 10cm 2 The copper sheet is used as cathode 4, first soaked in dilute acid to remove the surface oxide film, and then washed with distilled water;

[0074] 2. Add a cation exchange membrane 2 between the cathode chamber and the intermediate wastewater chamber;

[0075] 3. A product outlet is provided in the cathode chamber to separate the generated lithium hydroxide in time, facilitating the reaction to proceed in the direction of generating lithium hydroxide;

[0076] 4. Add 0.1 mol / L sodium hydroxide solution to provide alkalinity;

[0077] 5. The lithium ions that enter the cathode chamber through the cation exchange membrane 2 react with hydroxide to form lithium hydroxide precipitate.

[0078] (IV) Assembly method of the device

[0079] Same as Example 1.

[0080] Example 3

[0081] like Figure 1 and 6 As shown, a method for self-generated electrochemical uranium extraction and coordinated in-situ conversion of phosphorus wastewater drives wastewater purification and simultaneously recovers uranium and calcium fluoride, using a three-chamber battery device with anion and cation membranes.

[0082] (I) Anode chamber

[0083] 1. Set the size to 10cm 2 Soak the iron sheet in dilute acid to remove the surface oxide film, and then rinse with distilled water;

[0084] 2. Create an oxygen-deficient environment in the anode chamber and fill it with nitrogen for 5 to 10 minutes to prevent iron from being oxidized by air;

[0085] 3. A reaction liquid inlet 8 (i.e., electrolyte inlet) is provided in the anode chamber of the device, and H2SO4 solution with a specified pH value is filled into the anode chamber (a peristaltic pump is used to circulate the H2SO4 solution).

[0086] 4. The concentration used is 5X10 -5 mol / L sulfuric acid (pH=3) is added to the anode chamber to provide an acidic environment, reacting with iron to produce Fe(II);

[0087] 5. Add anion exchange membrane 1 between the anode chamber and the intermediate wastewater chamber;

[0088] 6. Oxidation of Fe to Fe(II) occurs in the anode chamber providing electron flow through an external circuit to the cathode 4;

[0089] 7. Add calcium chloride solution to the anode chamber to react with fluoride ions passing through the anion exchange membrane 1 to form calcium fluoride precipitate;

[0090] 8. A product outlet is provided in the anode chamber of the device to separate the generated white precipitated calcium fluoride in time, which is conducive to the reaction in the direction of generating calcium fluoride.

[0091] (II) Intermediate wastewater chamber

[0092] 1. Add fluoride-containing wastewater (fluoride ion concentration is 100 mg / L);

[0093] 2. Fluoride ions in the wastewater enter the anode through the anion exchange membrane 1 and react with calcium ions to form calcium fluoride precipitate;

[0094] 3. The defluorinated wastewater undergoes biological treatment to decompose the organic pollutants in the wastewater, and then uses membrane separation technology (ultrafiltration and reverse osmosis) to obtain pure water.

[0095] (III) Cathode chamber

[0096] Same as Example 1.

[0097] (IV) Assembly method of the device

[0098] Same as Example 1.

[0099] Example 4

[0100] like Figure 1 and 6 As shown, a method for self-generated electrochemical uranium extraction and coordinated in-situ conversion of phosphorus wastewater drives wastewater purification and simultaneously recovers copper and hydroxyapatite, using a three-chamber battery device with anion and cation membranes.

[0101] (I) Anode chamber

[0102] 1. Use iron as anode material;

[0103] 2. Create an oxygen-deficient environment in the anode chamber and fill it with nitrogen for 5 to 10 minutes to prevent iron from being oxidized by air;

[0104] 3. A reaction liquid inlet 8 (i.e., electrolyte inlet) is provided in the anode chamber of the device, and a calcium chloride solution of a certain concentration is filled into the anode chamber;

[0105] 4. Add sulfuric acid to the electrolyte to maintain a suitable pH range (7.5-8.5) for the precipitation of hydroxyapatite;

[0106] 5. Add anion exchange membrane 1 between the anode chamber and the intermediate wastewater chamber;

[0107] 6. Oxidation of iron occurs in the anode chamber providing electron flow through an external circuit to the cathode 4 driving the reduction of Cu(II) to Cu;

[0108] 7. The phosphorus-containing wastewater added to the intermediate wastewater chamber, phosphate ions pass through the anion exchange membrane 1, react with calcium ions, and are conducive to the precipitation of hydroxyapatite under the condition of pH value of 7.5-8.5;

[0109] 8. A product outlet is provided in the anode chamber of the device to separate the generated hydroxyapatite in time, which is conducive to the reaction in the direction of generating hydroxyapatite.

[0110] (II) Intermediate wastewater chamber

[0111] 1. Add phosphorus-containing wastewater (phosphorus concentration: 100 mg / L);

[0112] 2. Phosphorus-containing anions such as phosphate in the wastewater enter the anode chamber through the anion exchange membrane 1 and react with the calcium chloride solution to form hydroxyapatite.

[0113] 3. The dephosphorization wastewater undergoes biological treatment to decompose the organic pollutants in the wastewater, and then uses membrane separation technology (ultrafiltration and reverse osmosis) to obtain pure water.

[0114] (III) Cathode chamber

[0115] 1. Adding Cu(II) as cathode material;

[0116] 2. Fill a certain amount of CuSO4 solution into the cathode chamber;

[0117] 3. The iron oxidation reaction provides electron flow to the cathode 4 of the cathode chamber, thereby driving the reduction of Cu(II) to Cu in the cathode chamber.

[0118] (IV) Assembly method of the device

[0119] 1. The parallel connection method is adopted to increase the current. The increase of current is beneficial to the operation of the device. The measured generation rate and content of hydroxyphosphite, wastewater phosphorus removal rate and copper output rate are significantly improved.

[0120] 2. Cut the anion and cation exchange membrane into the same size as the mold, and punch several small holes on its surface so that the screws for fixing the device and the wastewater solution can pass through smoothly.

[0121] 3. Before assembly, rinse the anion and cation exchange membranes with deionized water several times and soak them in deionized water respectively. After cleaning, store them in the solution. The screws and joints of the assembly mold are tightly wrapped with raw tape to prevent water leakage and short circuit.

[0122] The above-mentioned embodiment of the present invention provides a device and method for extracting self-generating materials and coordinating in-situ conversion of wastewater, which solves the energy consumption problem in the wastewater purification process, and can also obtain resource materials such as uranium. It has low usage requirements, is environmentally friendly, and has the advantage of sustainable utilization; the wastewater purification method adopted is suitable for treating wastewater containing phosphorus, lithium or fluorine, and can be extended to implementation in the fields of seawater desalination, nuclear wastewater treatment, sewage treatment, etc., and has a wide range of applications.

[0123] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0124] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A device for extracting self-generating substances and coordinating in-situ conversion of wastewater, comprising a device body, characterized in that: The device body includes an anode chamber and a cathode chamber, and an intermediate wastewater chamber is located between the anode chamber and the cathode chamber; The anode chamber provides an electron flow to the cathode of the cathode chamber through an anodic oxidation reaction, thereby driving the reduction process of the metal in the cathode chamber; during this process, the anode chamber produces minerals in situ and simultaneously purifies the wastewater in the intermediate wastewater chamber; An anion exchange membrane is provided between the intermediate wastewater chamber and the anode chamber, and a cation exchange membrane is provided between the intermediate wastewater chamber and the cathode chamber; The anode chamber is also provided with a mineral outlet and a reaction liquid inlet; The cathode chamber is also provided with a reduced metal outlet and a metal-containing wastewater inlet.

2. The device for extracting self-generating substances and coordinating in-situ conversion of wastewater according to claim 1 is characterized in that: The reaction liquid inlet of the anode chamber is input with sulfuric acid; The anode material of the anode chamber is iron; The cathode material of the cathode chamber is U(VI); The wastewater in the intermediate wastewater chamber is phosphorus-containing wastewater; The oxidation reaction of Fe to Fe(II) in the anode chamber provides an electron flow to the cathode of the cathode chamber, thereby driving the reduction of U(VI) to U(IV) in the cathode chamber. The phosphate ions in the intermediate wastewater chamber pass through the anion exchange membrane and react with Fe(II) to generate cyanite in situ.

3. The device for extracting self-generating substances and coordinating in-situ conversion of wastewater according to claim 1 is characterized in that: The reaction liquid inlet of the anode chamber is input with sulfuric acid; The anode material of the anode chamber is iron; The wastewater in the intermediate wastewater chamber is lithium-containing wastewater; The cathode material of the cathode chamber is copper; The oxidation reaction of Fe to Fe(II) in the anode chamber provides an electron flow to the cathode of the cathode chamber, and the lithium ions in the intermediate wastewater chamber enter the cathode chamber through the cation exchange membrane to generate lithium hydroxide under alkaline conditions.

4. The device for extracting self-generated materials and coordinating in-situ conversion of wastewater according to claim 1, characterized in that: The reaction liquid inlet of the anode chamber is input with sulfuric acid; The anode material of the anode chamber is iron; The cathode material of the cathode chamber is U(VI); The wastewater in the intermediate wastewater chamber is fluorine-containing wastewater; The oxidation reaction of Fe to Fe(II) in the anode chamber provides an electron flow to the cathode of the cathode chamber, thereby driving the reduction of U(VI) to U(IV) in the cathode chamber. A calcium chloride solution is also added to the anode chamber, and the fluoride ions in the intermediate wastewater chamber react with the calcium chloride solution through the anion exchange membrane to form calcium fluoride precipitate.

5. The device for extracting self-generating substances and coordinating in-situ conversion of wastewater according to claim 1 is characterized in that: The reaction liquid inlet of the anode chamber is input with sulfuric acid; The anode material of the anode chamber is iron; The cathode material of the cathode chamber is Cu(II); The wastewater in the intermediate wastewater chamber is phosphorus-containing wastewater; A calcium chloride solution is also added to the anode chamber, and a CuSO4 solution is also added to the cathode chamber. The oxidation reaction of iron provides an electron flow to the cathode of the cathode chamber, thereby driving the reduction of Cu(II) in the cathode chamber to Cu; the phosphate ions in the intermediate wastewater chamber pass through the anion exchange membrane and react with the calcium chloride solution to generate hydroxyapatite.

6. A method for spontaneous electrochemical uranium extraction and in-situ conversion of phosphorus wastewater, characterized in that: The device for extracting self-generating substances and coordinating in-situ conversion of wastewater as described in any one of claims 1 to 5 is used to convert chemical energy into electrical energy, and the potential difference generated by the redox reaction is used to power the device, drive the wastewater purification process, and recover metals and other substances at the same time.

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