Method and device for mineral fortification of wastewater containing antimony

Abstract

The present application relates to wastewater treatment technical field, provide a kind of mineral reinforced processing antimony-containing wastewater method and device.The method is to be treated wastewater into electrolytic cell, the surface of the soluble metal aluminum electrode plate in the electrolytic cell is coated with the mineral containing device of porous water-permeable structure, the device is filled with solid iron-containing mineral;Under the driving of flow unit, antimony-containing wastewater passes through the mineral containing device and flows through the contact interface of mineral and electrode plate;Under the action of applied electric field, aluminum ions dissolved from electrode plate and iron ions released from mineral are enriched at the contact interface at high concentration, and in-situ coprecipitation reaction occurs with antimony ions in wastewater to precipitate antimony-containing floc, and then the treatment liquid containing floc is introduced into adsorption tank for solid-liquid separation.Not only effectively avoid the loss of small mineral particles in continuous water flow and pipeline blockage, but also significantly shorten the hydraulic retention time, realize the efficient, rapid and continuous in-situ remediation of low-concentration antimony-containing wastewater in natural environment.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a method and apparatus for mineral-enhanced treatment of antimony-containing wastewater. Background Technology

[0002] Currently, the mainstream technologies for removing antimony pollution from water bodies include adsorption, coagulation and flocculation, ion exchange, membrane separation, and microbial methods. Among them, adsorption is simple to operate, but when traditional mineral adsorbents are applied to in-situ continuous fluid treatment, the tiny mineral particles are easily lost with the water flow, difficult to recover, and may even cause engineering hazards such as clogging of subsequent pipelines; coagulation and flocculation can efficiently treat high-concentration wastewater, but it is prone to producing toxic byproducts, causing secondary pollution; ion exchange has stringent influent conditions; membrane separation, although it does not require the addition of external reagents, faces problems of membrane fouling and high treatment costs; and microbial methods have application bottlenecks such as antimony pollution inhibiting microbial activity and difficulty in screening stable electron donors.

[0003] In recent years, electroremediation has attracted attention due to its advantages such as convenient operation and low risk of secondary pollution. However, traditional electroremediation (electrocoagulation) technology is often limited by the sacrifice and passivation of the anode electrode plate when treating antimony-containing wastewater. This results in a short operating cycle of the electroremediation system, and the removal efficiency of the electric field for antimony shows a significant downward trend as the operating time increases. At the same time, relying solely on sacrificial anodes for electrocoagulation leads to slow reaction kinetics when treating low-concentration water bodies, resulting in excessively long hydraulic retention times.

[0004] To improve processing efficiency, some existing technologies attempt to directly scatter mineral materials into the water to assist in antimony removal. However, in a continuous fluid system driven by a water pump, the scattered materials not only exacerbate the problem of particle loss, but also the free mineral particles cannot effectively fit with the high field strength active area on the electrode surface, resulting in the inability to achieve efficient in-situ co-precipitation of multiple ions.

[0005] Furthermore, existing treatment technologies mostly focus on high-concentration industrial antimony-containing wastewater generated by industries such as printing and textiles, while research on in-situ treatment of low-concentration (<500 ppb) antimony pollution in natural water bodies is relatively weak. The removal of low-concentration antimony from natural water bodies not only faces the problem of slow kinetics, but also lacks engineering devices and methods that can operate stably for a long time, at low cost, and with low carbon emissions. Summary of the Invention

[0006] This invention addresses the technical problems of short operating cycles and long hydraulic retention times in the treatment of low-concentration antimony-containing wastewater by electrolytic flocculation, and the easy loss of tiny mineral particles with water flow and clogging of pipelines during in-situ continuous fluid treatment using conventional mineral adsorption. It provides a device and method for mineral-enhanced treatment of antimony-containing wastewater, achieving efficient and rapid in-situ remediation of low-concentration antimony-containing wastewater while ensuring continuous and stable system fluid operation, thus solving the aforementioned problems.

[0007] The technical solution of this invention is as follows:

[0008] This invention provides a method for mineral-enhanced treatment of antimony-containing wastewater, comprising the following process steps:

[0009] The antimony-containing wastewater to be treated is fed into an electrolytic cell, which is equipped with soluble aluminum electrode plates and a mineral containing device. The soluble aluminum electrode plates include an anode plate and a cathode plate arranged at intervals. Each soluble aluminum electrode plate is covered with an independent mineral containing device, which is a mesh-like assembly that forms a gap with the surface of the soluble aluminum electrode plate to contain solid iron-containing minerals. The solid iron-containing minerals are fixed to the surface of the soluble aluminum electrode plate by the mineral containing device. The antimony-containing wastewater passes through the mineral containing device and flows through the contact interface between the solid iron-containing minerals and the soluble aluminum electrode plate.

[0010] Under the action of the external electric field output by the power supply component, the aluminum ions dissolved from the soluble aluminum electrode plate and the iron ions released from the solid iron-containing minerals are enriched at a high concentration at the contact interface, and undergo an in-situ co-precipitation reaction with antimony ions in the wastewater to precipitate flocculent precipitates, that is, the dissolved antimony in the wastewater is converted into solid phase precipitation.

[0011] Preferably, after converting dissolved antimony in the wastewater into solid precipitation, the process further includes a solid-liquid separation step: introducing the generated treatment liquid containing flocculent precipitate into an adsorption tank, and using the adsorption medium set in the adsorption tank to adsorb and intercept the flocculent precipitate, thereby completing the deep purification of the antimony-containing wastewater.

[0012] Preferably, the method further includes a pretreatment step: before the antimony-containing wastewater to be treated is introduced into the electrolytic cell, it is first introduced into a pretreatment sedimentation tank so that large-particle suspended impurities are removed under gravity sedimentation.

[0013] Preferably, the solid iron-containing mineral is natural pyrrhotite or a de-antimony-releasing iron solid phase carrier; the de-antimony-releasing iron solid phase carrier is prepared by loading artificially synthesized pyrrhotite onto activated carbon; the particle size of the natural pyrrhotite or the de-antimony-releasing iron solid phase carrier is 1 mm to 3 mm.

[0014] Preferably, the soluble aluminum electrode plates are arranged in such a ratio as follows: the number of anode plates to cathode plates is 3:1, and the spacing between adjacent electrode plates is 10cm.

[0015] Preferably, the specific operation of the power supply component outputting the external electric field is as follows: inputting a constant DC current to the soluble aluminum electrode plate, with a current density of 1.08 A / m² to 2.5 A / m².

[0016] The present invention also provides an apparatus for mineral-enhanced treatment of antimony-containing wastewater, comprising: an electrolytic cell, a power supply component, and a flow unit;

[0017] The flow unit is used to drive the antimony-containing wastewater to be treated to flow continuously.

[0018] The electrolytic cell includes an electrolytic cell, a soluble aluminum electrode plate, a mineral container and a solid iron-containing mineral disposed within the electrolytic cell, wherein the soluble aluminum electrode plate includes an anode plate and a cathode plate disposed at intervals.

[0019] The mineral containment device is a mesh kit forming a porous, permeable structure and covering the surface of the soluble aluminum electrode plate. The solid iron-containing mineral is filled inside the mineral containment device. The flow unit is used to drive the antimony-containing wastewater through the mineral containment device and through the contact interface between the solid iron-containing mineral and the soluble aluminum electrode plate.

[0020] The power supply component is connected to the soluble aluminum electrode plate to provide an external electric field, which drives the aluminum ions dissolved from the soluble aluminum electrode plate and the iron ions released from the solid iron-containing mineral to accumulate at a high concentration at the contact interface, and to undergo an in-situ co-precipitation reaction with antimony ions to generate a treatment solution containing flocculent precipitates.

[0021] Preferably, the device further includes a solid-liquid separation unit; the solid-liquid separation unit is connected to the outlet end of the electrolytic cell and includes an adsorption tank and an adsorption medium disposed in the adsorption tank, the adsorption medium being used to adsorb and intercept flocculent precipitates in the treated liquid.

[0022] Preferably, the device further includes a pretreatment tank disposed before the water inlet of the electrolytic cell for removing large-particle suspended impurities from the wastewater; the flow unit includes a first water pump and a second water pump; the first water pump is disposed between the pretreatment tank and the electrolytic cell, and the second water pump is disposed at the water outlet of the adsorption tank for discharging purified water to maintain continuous operation of the system; the processing flow rates of the first water pump and the second water pump are both 30 mL / min to 140 mL / min.

[0023] Preferably, the mineral containing device is a permeable mesh bag or a porous plate; the permeable mesh bag or porous plate is made of nylon and its surface area is larger than that of the soluble aluminum electrode plate it covers.

[0024] The beneficial effects of this invention are as follows:

[0025] This invention provides a method and apparatus for mineral-enhanced treatment of antimony-containing wastewater. A porous, permeable mineral-containing device, formed by a mesh-like assembly, is wrapped around the surface of each soluble aluminum electrode plate, ensuring close contact between the solid iron-containing minerals within the mesh and the electrode plates. Under an applied electric field, aluminum ions dissolved from the electrode plates and iron ions released from the iron-containing minerals accumulate at a high concentration at the contact interface. The iron hydroxide generated by the iron ions interacts with antimony ions through its surface functional groups, and rapidly undergoes an in-situ co-precipitation reaction with the aluminum ions. This structure effectively accelerates antimony removal, shortens the hydraulic retention time, and improves the system's remediation capacity. Simultaneously, by enhancing the electrode system with iron-containing minerals, the problem of rapid consumption caused by relying solely on sacrificial anodes is effectively alleviated, extending the system's lifespan. The porous, permeable mineral-containing device physically encapsulates and constrains the iron-containing minerals. Under continuous fluid drive, this structure ensures that antimony-containing wastewater can smoothly pass through and flow through the contact interface, while completely preventing mineral particles from being dispersed by the water flow. This ensures the stability of continuous water treatment and solves the technical problem of easy loss of small particles and blockage of pipelines in the in-situ continuous fluid treatment of existing mineral adsorption methods. It provides a reliable technical solution for the in-situ treatment of low-concentration antimony-polluted water bodies in mining environments.

[0026] Some embodiments of the present invention further employ a three-anode-one-cathode spatial arrangement, with the spacing between adjacent electrodes set at 10 cm. Coupled with a constant DC current of 1.08 A / m² to 2.5 A / m², this specific arrangement and current parameters construct an asymmetric electric field environment, reducing operating energy consumption while ensuring uniform dissolution of aluminum ions and stable release of iron ions, further improving the removal rate of low-concentration antimony-containing wastewater. Natural pyrrhotite or synthetic pyrrhotite supported on activated carbon is preferred as the solid iron-containing mineral, exhibiting superior antimony removal performance; simultaneously, controlling its particle size to 1 mm to 3 mm ensures good permeability while avoiding sand leakage from the containment device due to excessively fine particles, achieving a balance between fluid dynamics and electrochemical reaction rates.

[0027] In some embodiments of the present invention, a pretreatment sedimentation tank is used to remove large particulate suspended solids in wastewater in advance by gravity sedimentation, thereby reducing the treatment load on the electrolytic cell; the final stage is set up as an adsorption tank mainly composed of multi-layer packing (quartz sand, activated carbon, etc.) as a solid-liquid separation unit, which can completely intercept and remove flocculent precipitates and particulate matter generated by electrolysis, ensuring the purity of the final effluent and achieving deep purification of the water body. Attached Figure Description

[0028] Figure 1 A schematic diagram of the apparatus for mineral-enhanced treatment of antimony-containing wastewater provided by the present invention.

[0029] Figure 2 A schematic diagram of the electrode plate, mineral containment component, and iron-containing mineral in the mineral-enhanced treatment device for antimony-containing wastewater provided by the present invention. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the following detailed description of a method and apparatus for mineral-enhanced treatment of antimony-containing wastewater, in conjunction with the accompanying drawings and specific embodiments, is provided. The advantages and features of this invention will become clearer from the following description. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, used only to facilitate and clearly illustrate the purpose of the embodiments of this invention. Please refer to the accompanying drawings to make the objectives, features, and advantages of this invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention.

[0031] This invention provides a method for mineral-enhanced treatment of antimony-containing wastewater, comprising the following steps:

[0032] The antimony-containing wastewater to be treated is fed into an electrolytic cell, which is equipped with soluble aluminum electrode plates and a mineral containing device. The soluble aluminum electrode plates include an anode plate and a cathode plate arranged at intervals. Each soluble aluminum electrode plate is independently covered with a mineral containing device, which is a mesh kit that forms a gap with the surface of the soluble aluminum electrode plate to contain solid iron-containing minerals. The solid iron-containing minerals are fixed to the surface of the soluble aluminum electrode plate by the mineral containing device. The antimony-containing wastewater passes through the mineral containing device and flows through the contact interface between the solid iron-containing minerals and the soluble aluminum electrode plate.

[0033] Under the action of the external electric field output by the power supply component, the aluminum ions dissolved from the soluble aluminum electrode plate and the iron ions released from the solid iron-containing minerals are enriched at a high concentration at the contact interface, and undergo an in-situ co-precipitation reaction with antimony ions in the wastewater to precipitate flocculent precipitates, that is, the dissolved antimony in the wastewater is converted into solid phase precipitation.

[0034] In some embodiments of the present invention, after the dissolved antimony in the wastewater is converted into a solid phase and precipitated, a solid-liquid separation step is further included: the generated treatment liquid containing flocculent precipitate is introduced into an adsorption tank, and the flocculent precipitate is adsorbed and intercepted by the adsorption medium set in the adsorption tank, thereby completing the deep purification of the antimony-containing wastewater.

[0035] In some embodiments of the present invention, the method further includes a pretreatment step: before the antimony-containing wastewater to be treated is introduced into the electrolytic cell, it is first introduced into a pretreatment sedimentation tank so that large-particle suspended impurities are removed under the action of gravity sedimentation.

[0036] In some embodiments of the present invention, the solid iron-bearing mineral is natural pyrrhotite or a de-antimony-releasing iron solid phase carrier; the de-antimony-releasing iron solid phase carrier is prepared by loading artificially synthesized pyrrhotite onto activated carbon; the particle size of the natural pyrrhotite or the de-antimony-releasing iron solid phase carrier is 1 mm to 3 mm.

[0037] In some embodiments of the present invention, the soluble aluminum electrode plates are arranged such that the ratio of the number of anode plates to cathode plates is 3:1, and the spacing between adjacent electrode plates is 10cm.

[0038] In some embodiments of the present invention, the specific operation of the power supply component outputting the applied electric field is as follows: inputting a constant direct current to the soluble aluminum electrode plate, with a current density of 1.08 A / m² to 2.5 A / m².

[0039] In some embodiments of the present invention, the specific installation arrangement of the soluble aluminum electrode plates is as follows: multiple anode plates are fixed perpendicular to the wide side of the electrolytic cell, and the cathode plate is fixed perpendicular to the anode plates.

[0040] In some embodiments of the present invention, the method further includes a pH pre-adjustment step: adjusting the antimony-containing wastewater to be treated to neutral or near-neutral pH using NaOH solution or PBS buffer.

[0041] In some embodiments of the present invention, the method further includes: determining the placement positions of the pretreatment pool, electrolysis pool, and adsorption pool according to the spatial distribution around the antimony mine, and fabricating an overflow pipe of appropriate length according to the position.

[0042] This invention also provides a device for mineral-enhanced treatment of antimony-containing wastewater, as shown in the schematic diagram. Figure 1 As shown, it includes: an electrolytic cell 5, a power supply assembly 8, and a flow unit 4;

[0043] The flow unit 4 is used to drive the antimony-containing wastewater 1 to be treated to flow continuously.

[0044] The electrolytic cell 5 includes an electrolytic cell 5, a soluble aluminum electrode plate 6, a mineral containing device 14, and a solid iron-containing mineral 15 disposed in the electrolytic cell 5. The soluble aluminum electrode plate 6 includes an anode plate and a cathode plate disposed at intervals.

[0045] The mineral containing device 14 has a porous and permeable structure and is wrapped around the surface of the soluble aluminum electrode plate 6. The solid iron-containing mineral 15 is filled in the mineral containing device 14. The flow unit 4 drives the antimony-containing wastewater 1 through the mineral containing device 14 and flows through the contact interface between the solid iron-containing mineral 15 and the soluble aluminum electrode plate 6.

[0046] The power supply component 8 is connected to the soluble aluminum electrode plate 6 to provide an external electric field, thereby driving the aluminum ions dissolved from the soluble aluminum electrode plate 6 and the iron ions released from the solid iron-containing mineral 15 to accumulate at a high concentration at the contact interface, and to undergo an in-situ co-precipitation reaction with antimony ions to generate a treatment solution containing flocculent precipitates.

[0047] In some embodiments of the present invention, the device further includes: a pretreatment tank 3 for removing large particulate suspended matter; an adsorption tank 10 for retaining flocculent precipitates to ensure the quality of the effluent; an overflow pipe 9 for connecting each treatment unit; connecting wires 7 for connecting circuits; a solar power supply 2 for providing energy for the operation of the device, specifically including a solar panel 11, a mounting bracket 12, and a battery 13; a detection unit 16 for monitoring data and uploading it to the cloud; and a camera 17 for real-time observation of the site conditions of the contaminated area.

[0048] In some embodiments of the present invention, the pretreatment sedimentation tank is approximately 105cm long, 72cm wide, and 65cm high, and can store approximately 300L of wastewater.

[0049] In some embodiments of the present invention, the electrolytic cell is approximately 83cm long, 63cm wide, and 60cm high, with an effective water storage capacity of approximately 200L.

[0050] In some embodiments of the present invention, the adsorption tank is approximately 83cm long, 63cm wide, and 60cm high, with an effective water storage capacity of approximately 200L.

[0051] In some embodiments of the present invention, the amount of layered packing material in the adsorption tank is specifically set as follows: about 20 kg of quartz sand is placed in the bottom layer, about 75 kg of activated carbon is placed in the middle layer, and about 20 kg of quartz sand is placed in the top layer.

[0052] In some embodiments of the present invention, the amount of solid iron-containing mineral added to the mineral container is 300g.

[0053] In some embodiments of the present invention, the soluble aluminum electrode plate is an industrial-grade aluminum plate.

[0054] In some embodiments of the present invention, the device further includes an overflow pipe for connecting each treatment tank, the overflow pipe being a PVC, PPR, or PE pipe.

[0055] In some embodiments of the present invention, the power supply component is a solar power source, and the daily power generation of the solar power source is configured to be 1 to 1.5 times the daily operating power of the device.

[0056] In some embodiments of the present invention, the device further includes a camera that is connected to the cloud for real-time observation of the site conditions of the contaminated area.

[0057] In some embodiments of the present invention, the solid iron-containing mineral is prepared by crushing and ball milling iron-containing mineral raw materials.

[0058] Experimental Example 1

[0059] This experimental example is a laboratory test on the treatment of antimony-containing wastewater using different iron-containing minerals and their modified materials.

[0060] 150 mL of antimony-containing wastewater with an antimony concentration of 11.66 mg / L was prepared, and the pH of the solution was adjusted to neutral using PBS buffer. The wastewater was placed in a 150 mL reaction vessel and continuously stirred at 1000 rpm using a magnetic stirrer. 1.0 g each of pyrite and natural pyrrhotite were added to the reaction vessel, and the reaction was carried out at room temperature for 12 h. After the reaction, the change in antimony concentration in the solution was measured, and the antimony removal capacity was calculated. The results showed that pyrite and natural pyrrhotite removed 0.12 mg and 0.36 mg of antimony, respectively. Both could remove antimony pollutants from the water, but pyrrhotite exhibited superior antimony removal performance.

[0061] The removal efficiency of antimony by pyrrhotite and activated carbon-supported pyrrhotite particles was evaluated using a control electrolysis system.

[0062] Three parallel electrolytic cells were set up, each with a volume of 150 mL. Both the cathode and anode were made of commercial-grade aluminum plates, and the electrode spacing was fixed at 8 cm. Cell A was filled with 40-mesh quartz sand as a pure electrolysis control group; Cell B was filled with a mixture of quartz sand and activated carbon-loaded pyrrhotite particles; and Cell C was filled with a mixture of quartz sand and pyrrhotite particles. Polluted water from the surrounding environment of a real antimony mine (antimony concentration 404.96 ppb, pH 7.86) was added to each electrolytic cell. A DC regulated power supply was used, with the current density controlled at 1.08 A / m². The experimental results showed that after 24 hours of operation, the antimony removal rate of the pure electrolysis system (Cell A) reached 94.47%; the antimony removal rate of the system with added natural pyrrhotite particles (Cell C) reached 94.80%; and the antimony removal rate of the system with added synthetic pyrrhotite particles (Cell B) reached 98.07%.

[0063] Experimental Example 2

[0064] This experimental example is a small-scale laboratory test of mineral-enhanced treatment of antimony-containing wastewater. The main body is a rectangular reaction vessel with the following design: length 370mm, width 90mm, and height 125mm. An inlet is located at the bottom of one end of the reaction vessel, and an outlet is located at the top of the other end. The pollutant in the reaction vessel is simulated wastewater similar to the polluted water body surrounding an antimony mine. The simulated wastewater was prepared based on the measurement results of real water samples, calculating and preparing the concentration of each ion in the solution (antimony concentration 396.10 ppb). Simultaneously, a 0.01 mol / L NaOH solution was used to adjust the pH to near neutral. The inlet and outlet of the reaction vessel are connected by flexible hoses, and the antimony-polluted water body is circulated by a water pump to simulate water flow. A small laboratory power supply is used as the power supply component. The electrodes are arranged in a three-anode-one-cathode configuration, with a distance of 100mm between electrode units, and one group is placed in the center of the reaction vessel. Industrial-grade aluminum plates are used as electrode plates. The current between the anode and cathode is 10mA. Iron-containing minerals with a particle size of 100 mesh were added between the mineral container and the electrode plate at a dosage of 3g. After 48 hours of remediation, the removal rate of antimony in the contaminated medium was measured to be 98.4%, with a removal amount of 0.36mg.

[0065] Experimental Example 3

[0066] The Wulichuan antimony mine in Hushi County, Sanmenxia City, Henan Province, suffers from severe antimony pollution in its water bodies. This device was used for in-situ testing. The total power of the solar panels is 2000W, matched with corresponding mounting brackets and batteries. The pretreatment tank is approximately 105cm long, 72cm wide, and 65cm high, capable of storing approximately 300L of wastewater. The electrolytic cell is approximately 83cm long, 63cm wide, and 60cm high, with an effective water storage capacity of approximately 200L. The electrodes adopt a three-anode, one-cathode arrangement, with a distance of 10cm between the electrodes, and two sets are arranged. The electrodes are made of industrial-grade aluminum plates, and the mineral container is made of nylon material with an outer diameter slightly larger than the electrode plates. The current intensity between the anode and cathode of the electrode unit is 2.5A. Iron-containing minerals with a particle size of 1-3mm are filled between the mineral container and the electrode plates, with an iron-containing mineral addition amount of 300g. An adsorption tank was installed after the electrolytic cell. The activated carbon adsorption tank was approximately 83cm long, 63cm wide, and 60cm high, with an effective water storage capacity of approximately 200L. The packing material was arranged in a layered manner, with approximately 20kg of quartz sand in the bottom layer, approximately 75kg of activated carbon in the middle layer, and approximately 20kg of quartz sand in the top layer. Data was uploaded to the cloud in real time via a data detection unit. After 48 hours of remediation, the antimony concentration at the effluent was measured, showing a removal rate of 70.67% and a removal amount of 155.6mg.

[0067] Finally, it should be noted that the above embodiments are only used to help further understand the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that various substitutions and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the present invention should not be limited to the content disclosed in the embodiments.

Claims

1. A method for mineral-enhanced treatment of antimony-containing wastewater, characterized in that, The process includes the following steps: The antimony-containing wastewater to be treated is fed into an electrolytic cell, which is equipped with soluble aluminum electrode plates and a mineral containing device. The soluble aluminum electrode plates include an anode plate and a cathode plate arranged at intervals. Each soluble aluminum electrode plate is covered with an independent mineral containing device, which is a mesh-like assembly that forms a gap with the surface of the soluble aluminum electrode plate to contain solid iron-containing minerals. The solid iron-containing minerals are fixed to the surface of the soluble aluminum electrode plate by the mineral containing device. The antimony-containing wastewater passes through the mineral containing device and flows through the contact interface between the solid iron-containing minerals and the soluble aluminum electrode plate. Under the action of the external electric field output by the power supply component, the aluminum ions dissolved from the soluble aluminum electrode plate and the iron ions released from the solid iron-containing minerals are enriched at a high concentration at the contact interface, and undergo an in-situ co-precipitation reaction with antimony ions in the wastewater to precipitate flocculent precipitates, that is, the dissolved antimony in the wastewater is converted into solid phase precipitation.

2. The method for mineral-enhanced treatment of antimony-containing wastewater according to claim 1, characterized in that, After converting dissolved antimony in the wastewater into solid precipitation, the process also includes a solid-liquid separation step: the generated treatment liquid containing flocculent precipitates is introduced into an adsorption tank, and the flocculent precipitates are adsorbed and intercepted by the adsorption medium set in the adsorption tank, thereby completing the deep purification of antimony-containing wastewater.

3. The method for mineral-enhanced treatment of antimony-containing wastewater according to claim 1 or 2, characterized in that, The method also includes a pretreatment step: before the antimony-containing wastewater to be treated is introduced into the electrolytic cell, it is first introduced into a pretreatment sedimentation tank so that large-particle suspended impurities are removed under gravity sedimentation.

4. The method for mineral-enhanced treatment of antimony-containing wastewater according to claim 1, characterized in that, The solid iron-containing mineral is natural pyrrhotite or an antimony-removing iron-releasing solid phase carrier; the antimony-removing iron-releasing solid phase carrier is prepared by loading artificially synthesized pyrrhotite onto activated carbon; the particle size of the natural pyrrhotite or the antimony-removing iron-releasing solid phase carrier is 1 mm to 3 mm.

5. The method for mineral-enhanced treatment of antimony-containing wastewater according to claim 1, characterized in that, The soluble aluminum electrode plates are arranged in such a ratio as follows: the number of anode plates to cathode plates is 3:1, and the spacing between adjacent electrode plates is 10cm.

6. The method for mineral-enhanced treatment of antimony-containing wastewater according to claim 1, characterized in that, The specific operation of the power supply component to output the external electric field is as follows: a constant DC current is input to the soluble aluminum electrode plate, with a current density of 1.08 A / m² to 2.5 A / m².

7. A device for mineral-enhanced treatment of antimony-containing wastewater, characterized in that, include: Electrolytic cells, power supply components, and flow units; The flow unit is used to drive the antimony-containing wastewater to be treated to flow continuously. The electrolytic cell includes an electrolytic cell, a soluble aluminum electrode plate, a mineral container and a solid iron-containing mineral disposed within the electrolytic cell, wherein the soluble aluminum electrode plate includes an anode plate and a cathode plate disposed at intervals. The mineral containment device is a mesh kit forming a porous, permeable structure and covering the surface of the soluble aluminum electrode plate. The solid iron-containing mineral is filled inside the mineral containment device. The flow unit is used to drive the antimony-containing wastewater through the mineral containment device and through the contact interface between the solid iron-containing mineral and the soluble aluminum electrode plate. The power supply component is connected to the soluble aluminum electrode plate to provide an external electric field, which drives the aluminum ions dissolved from the soluble aluminum electrode plate and the iron ions released from the solid iron-containing mineral to accumulate at a high concentration at the contact interface, and to undergo an in-situ co-precipitation reaction with antimony ions to generate a treatment solution containing flocculent precipitates.

8. The apparatus for mineral-enhanced treatment of antimony-containing wastewater according to claim 7, characterized in that, The device further includes a solid-liquid separation unit; the solid-liquid separation unit is connected to the outlet end of the electrolytic cell and includes an adsorption tank and an adsorption medium disposed in the adsorption tank, the adsorption medium being used to adsorb and intercept flocculent precipitates in the treated liquid.

9. The apparatus for mineral-enhanced treatment of antimony-containing wastewater according to claim 8, characterized in that, The device further includes a pretreatment tank located before the water inlet of the electrolytic cell for removing large-particle suspended impurities from the wastewater; the flow unit includes a first water pump and a second water pump; the first water pump is located between the pretreatment tank and the electrolytic cell, and the second water pump is located at the water outlet of the adsorption tank for discharging purified water to maintain continuous system operation; the processing flow rates of the first water pump and the second water pump are both 30 mL / min to 140 mL / min.

10. The apparatus for mineral-enhanced treatment of antimony-containing wastewater according to claim 7, characterized in that, The mineral containing device is a permeable mesh bag or a porous plate; the permeable mesh bag or porous plate is made of nylon and its surface area is larger than that of the soluble aluminum electrode plate it covers.

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