Device and method for extracting self-generating electricity substance and cooperating with wastewater in-situ conversion

Abstract

The invention is applicable to the technical field of spontaneous chemical power generation, and provides a device and a method for extracting self-generating power substances and cooperating with wastewater in-situ conversion, the device comprises a device body, the device body comprises an anode chamber and a cathode chamber, and an intermediate wastewater chamber is arranged between the anode chamber and the cathode chamber; the anode chamber provides an electron flow for a cathode of the cathode chamber through an anodic oxidation reaction, so that the reduction process of metal in the cathode chamber is driven; in the process, mineral substances are produced in situ in the anode chamber, and meanwhile, wastewater in the middle wastewater chamber is purified. The problem of energy consumption in the wastewater purification treatment process is solved, resource substances such as uranium can be obtained, and the method is low in use requirement, environmentally friendly, capable of achieving sustainable utilization and wide in application.

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] As a reliable, low-carbon energy source, nuclear power plays a key role in reducing global carbon dioxide emissions and helps achieve carbon neutrality goals. Nuclear energy production is expected to increase in the future, but its sustainability has raised concerns. The main issues include the security of uranium fuel supply and environmental impact. It is predicted that at the current consumption rate, the earth's uranium reserves may be exhausted within a century. In addition, the wastewater containing hexavalent uranium (U(VI)) produced during the uranium mining process, which contains highly mobile and toxic hexavalent uranium (U(VI)), will pollute the environment and threaten the ecosystem of neighboring areas if not properly handled.

[0003] Physical and chemical adsorption is a commonly used technology for the treatment of uranium-containing wastewater, but it is limited by the saturation of adsorption sites and the Coulomb repulsion effect, resulting in limited efficiency. Recent studies have found that direct current can reduce the adsorbed U(VI) species and avoid Coulomb repulsion, thereby improving the extraction efficiency, but this method has high energy consumption. Another feasible method is to reduce hexavalent uranium (U(VI)) to tetravalent uranium (U(IV)), among which zero-valent iron (ZVI) has attracted attention due to its economy 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 materials (nZVI) have problems such as high separation cost, easy oxidation, and aggregation in complex water bodies, which reduces their long-term reactivity.

[0004] Based on the above challenges, an innovative spontaneous electrochemical method is needed to convert chemical energy into electrical energy, use the potential difference generated by the redox reaction to power wastewater purification, and at the same time recover uranium resources and generate violaceous iron ore in situ (violaceous 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 the uranium recovery efficiency, but also reduces dependence on traditional uranium resources, while also reducing energy consumption and environmental impact in the wastewater treatment process. Summary of the invention

[0005] 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.

[0006] The present invention is implemented as follows: a device for extracting self-powered materials and coordinating in-situ conversion of wastewater, comprising a device body, wherein the device body comprises 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 of the cathode chamber through an anode oxidation reaction, thereby driving the reduction process of the metal in the cathode chamber; in this process, the anode chamber produces minerals in-situ, and at the same time purifies the wastewater in the intermediate wastewater chamber.

[0007] According to a further technical solution, 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.

[0008] According to a further technical solution, the anode chamber is further provided with a mineral outlet and a reaction solution inlet; the cathode chamber is further provided with a reduced metal outlet and a metal-containing wastewater inlet.

[0009] 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, react with Fe(II), and generate blue iron ore in situ.

[0010] 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 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.

[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 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, and 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 generate calcium fluoride precipitate.

[0012] 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 an anion exchange membrane and react with the calcium chloride solution to generate hydroxyapatite.

[0013] 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 adopts the above-mentioned device for self-generating material extraction and coordinated in-situ conversion of wastewater, converts chemical energy into electrical energy, utilizes the potential difference generated by the redox reaction to power the device, drives the wastewater purification treatment, and recovers metals and other substances at the same time.

[0014] 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:

[0015] The energy consumption problem in the wastewater purification process can be solved, and resource materials such as uranium can be obtained, 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

[0016] Figure 1 A schematic diagram of the structure of a device for extracting self-generating substances and coordinating in-situ conversion of wastewater provided in an embodiment of the present invention;

[0017] Figure 2 Schematic diagram of current response with different parallel numbers;

[0018] Figure 3 Schematic diagram of the change of uranium concentration over time under different parallel numbers;

[0019] Figure 4 Schematic diagram of the change of phosphorus concentration over time under different parallel numbers;

[0020] 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;

[0021] Figure 6 It is a schematic diagram of the parallel structure.

[0022] 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 solution inlet. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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.

[0024] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0025] like Figure 1 As shown, a device for extracting self-powered 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 an oxidation reaction at the anode 3, thereby driving the reduction process of the metal in the cathode chamber; in this process, the anode chamber produces minerals in situ, and at the same time purifies the wastewater in the intermediate wastewater chamber.

[0026] Among them, an anion exchange membrane 1 is provided between the intermediate wastewater chamber and the anode chamber, and a cation exchange membrane 2 is provided 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 can be understood that the device body can be arranged as three chambers of anion and cation membranes (i.e., the above-mentioned 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 chamber and the cathode chamber) as required.

[0027] 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 wastewater purification treatment, and recover metals and other substances at the same time.

[0028] 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.

[0029] The chambers are separated to selectively treat specific pollutants by controlling the electrode potential and electrode materials.

[0030] 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. are used as the anode 3 to react with phosphate ions, fluoride ions, etc. passing through the anion exchange membrane 1 to produce blue iron ore, calcium fluoride, etc. in situ.

[0031] 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.

[0032] The device is provided with an electrolyte inlet and a product outlet. As the reaction of the anode 3 proceeds, the acid is consumed and the pH value increases, which is conducive to the formation of cyanite (the pH value of the cyanite formation environment is usually between 6 and 9).

[0033] Uranium (VI), copper, etc. are used as cathode 4 materials, and alkaline conditions can be provided by sodium hydroxide, sodium carbonate, etc. Cations enter cathode 3 through cation exchange membrane 2 to produce lithium hydroxide, lithium carbonate, etc. At the same time, cathode 4 also produces resource materials such as uranium and copper.

[0034] The cathode and anode reaction phenomena are clearly observed. In this device, the anode 3 where iron is located produces light blue blue iron ore, and the cathode 4 produces uranium (IV) yellow sediment.

[0035] 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.

[0036] 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.

[0037] Example 1

[0038] 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 treatment, while recovering uranium and blue iron ore, using a three-chamber battery device with anion and cation membranes.

[0039] (I) Anode Chamber

[0040] 1. Set the size to 10cm 2 Soak the iron sheet in dilute acid to remove the surface oxide film, then wash it with distilled water;

[0041] 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;

[0042] 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).

[0043] 4. Use concentration of 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;

[0044] 5. Add an anion exchange membrane 1 between the anode chamber and the intermediate wastewater chamber;

[0045] 6. Oxidation of Fe to Fe(II) occurs in the anode chamber providing electron flow through an external circuit to the cathode 4 to drive the reduction of U(VI) to U(IV). Fe to Fe(II) E0 = 0.440 V vs. SHE was measured;

[0046] 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 to the formation of violet iron ore).

[0047] 8. A product outlet (i.e. mineral outlet 7) is provided in the anode chamber of the device to separate the generated light blue cyan violaceous ore in time, which is conducive to the reaction in the direction of generating violaceous ore.

[0048] (II) Intermediate Wastewater Chamber

[0049] 1. Add phosphorus-containing wastewater (phosphorus concentration: 100 mg / L);

[0050] 2. Phosphorus-containing anions such as phosphate in the wastewater enter the anode chamber through the anion exchange membrane 1, react with Fe(II), and generate blue iron ore in situ;

[0051] 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.

[0052] (III) Cathode Chamber

[0053] 1. Add U(VI) (concentration: 50 mg / L) as cathode 4;

[0054] 2. Add a cation exchange membrane 2 in the cathode chamber and the intermediate wastewater chamber;

[0055] 3. Oxidation of Fe to Fe(II) occurs by providing an electron flow through an external circuit to cathode 4 to drive reduction of U(VI) to U(IV) (E0=0.327V vs. SHE), reducing the hazard of U and producing uranium (U(IV)), a resource material.

[0056] (IV) Assembly method of the device

[0057] 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.

[0058] 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 smoothly.

[0059] 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.

[0060] Example 2

[0061] like Figure 1 and 6 As shown, a method for self-generated chemical uranium extraction and coordinated in-situ conversion of phosphorus wastewater is used to drive wastewater purification and simultaneously recover lithium hydroxide, using a three-chamber battery device with anion and cation membranes.

[0062] (I) Anode Chamber

[0063] 1. Set the size to 10cm 2 Soak the iron sheet in dilute acid to remove the surface oxide film, then wash it with distilled water;

[0064] 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;

[0065] 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).

[0066] 4. Use concentration of 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);

[0067] 5. Add an anion exchange membrane 1 between the anode chamber and the intermediate wastewater chamber;

[0068] 6. Oxidation of Fe to Fe(II) occurs in the anode chamber providing electron flow through an external circuit to the cathode 4.

[0069] (II) Intermediate Wastewater Chamber

[0070] 1. Add lithium-containing wastewater (Li concentration: 100 mg / L);

[0071] 2. The lithium ions in the wastewater enter the cathode chamber through the cation exchange membrane 2 and generate lithium hydroxide under alkaline conditions;

[0072] 3. The lithium-removing 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.

[0073] (III) Cathode Chamber

[0074] 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;

[0075] 2. Add a cation exchange membrane 2 between the cathode chamber and the intermediate wastewater chamber;

[0076] 3. A product outlet is provided in the cathode chamber to separate the generated lithium hydroxide in time, so as to facilitate the reaction to proceed in the direction of generating lithium hydroxide;

[0077] 4. Add 0.1 mol / L sodium hydroxide solution to provide alkalinity;

[0078] 5. The lithium ions that enter the cathode chamber through the cation exchange membrane 2 react with hydroxide to form lithium hydroxide precipitation.

[0079] (IV) Assembly method of the device

[0080] Same as Example 1.

[0081] Example 3

[0082] 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 treatment, while recovering uranium and calcium fluoride, using a three-chamber battery device with anion and cation membranes.

[0083] (I) Anode Chamber

[0084] 1. Set the size to 10cm 2 Soak the iron sheet in dilute acid to remove the surface oxide film, then wash it with distilled water;

[0085] 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;

[0086] 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).

[0087] 4. Use concentration of 5X10 -5mol / L sulfuric acid (pH=3) is added to the anode chamber to provide an acidic environment, reacting with iron to produce Fe(II);

[0088] 5. Add an anion exchange membrane 1 between the anode chamber and the intermediate wastewater chamber;

[0089] 6. Oxidation of Fe to Fe(II) occurs in the anode chamber providing electron flow through an external circuit to the cathode 4;

[0090] 7. Adding calcium chloride solution into the anode chamber to react with fluoride ions passing through the anion exchange membrane 1 to form calcium fluoride precipitate;

[0091] 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.

[0092] (II) Intermediate Wastewater Chamber

[0093] 1. Add fluoride-containing wastewater (fluoride ion concentration is 100 mg / L);

[0094] 2. Fluoride ions in the wastewater enter the anode through the anion exchange membrane 1 and react with calcium ions to form calcium fluoride precipitation;

[0095] 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.

[0096] (III) Cathode Chamber

[0097] Same as Example 1.

[0098] (IV) Assembly method of the device

[0099] Same as Example 1.

[0100] Example 4

[0101] 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 treatment, while recovering copper and hydroxyapatite, using a three-chamber battery device with anion and cation membranes.

[0102] (I) Anode Chamber

[0103] 1. Use iron as anode material;

[0104] 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;

[0105] 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;

[0106] 4. Add sulfuric acid to the electrolyte to maintain a suitable pH range (7.5-8.5) that is conducive to the precipitation of hydroxyapatite;

[0107] 5. Add an anion exchange membrane 1 between the anode chamber and the intermediate wastewater chamber;

[0108] 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;

[0109] 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 to 8.5;

[0110] 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.

[0111] (II) Intermediate Wastewater Chamber

[0112] 1. Add phosphorus-containing wastewater (phosphorus concentration: 100 mg / L);

[0113] 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.

[0114] 3. The dephosphorization wastewater undergoes biological treatment to decompose the organic pollutants in the wastewater, and then obtains pure water through membrane separation technology (ultrafiltration and reverse osmosis).

[0115] (III) Cathode Chamber

[0116] 1. Adding Cu(II) as cathode material;

[0117] 2. Fill a certain amount of CuSO4 solution into the cathode chamber;

[0118] 3. The oxidation reaction of iron provides electron flow to the cathode 4 of the cathode chamber, thereby driving the reduction of Cu(II) to Cu in the cathode chamber.

[0119] (IV) Assembly method of the device

[0120] 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.

[0121] 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 smoothly.

[0122] 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.

[0123] 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 and 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 the implementation in the fields of seawater desalination, nuclear wastewater treatment, sewage treatment, etc., and has a wide range of applications.

[0124] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0125] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached 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 comprises 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 of the cathode chamber through an anode 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.

2. The device for extracting self-generating substances and coordinating in-situ conversion of wastewater according to claim 1 is characterized in that: An anion exchange membrane is arranged between the intermediate wastewater chamber and the anode chamber, and a cation exchange membrane is arranged between the intermediate wastewater chamber and the cathode chamber.

3. The device for extracting self-generating substances and coordinating in-situ conversion of wastewater according to claim 2 is characterized in that: 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.

4. The device for extracting self-generating substances and coordinating in-situ conversion of wastewater according to claim 3 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 blue iron ore in situ.

5. The device for extracting self-generating substances and coordinating in-situ conversion of wastewater according to claim 3 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.

6. The device for extracting self-generating substances and coordinating in-situ conversion of wastewater according to claim 3 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 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 generate calcium fluoride precipitate.

7. The device for extracting self-generating substances and coordinating in-situ conversion of wastewater according to claim 3 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) 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.

8. 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 7 is used to convert chemical energy into electrical energy, and the potential difference generated by the redox reaction is used to power the device to drive wastewater purification treatment, while recovering metals and other substances.

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