Artificial floating island for coupling iron-carbon micro-electrolysis with floating plants and use method of artificial floating island

Abstract

The invention discloses an iron-carbon micro-electrolysis coupled floating plant artificial floating island and a use method, the artificial floating island comprises a floating plate, a plurality of iron-carbon micro-electrolysis cavities arranged at equal intervals below the floating plate, and a plurality of iron-carbon micro-electrolysis plates arranged at equal intervals below the floating plate; and the iron-carbon micro-electrolysis cavities and the iron-carbon micro-electrolysis plates are arranged at intervals in a staggered manner. The using method comprises the following steps: S1, preparing the iron-carbon micro-electrolysis plate; s2, constructing an artificial floating island; and S3, circulating repair. The sponge iron and the activated carbon are used as raw materials, pollutants in a water body are treated through an iron-carbon micro-electrolysis technology, heavy metal is adsorbed, the artificial floating island with a dual-purification function is formed, the content of the heavy metal in the water body is reduced, and compared with a pure iron-carbon micro-electrolysis floating island, the treatment efficiency is higher, and fewer raw materials are used.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and in particular to an artificial floating island of iron-carbon micro-electrolysis coupled with floating plants and a use method thereof. Background Art

[0002] Heavy metal pollution in freshwater environments has seriously affected the quality and safety of freshwater aquaculture waters and aquatic products. Heavy metals are cumulative in organisms and have a long half-life, which can cause teratogenicity, carcinogenicity, and mutagenicity. Excessive heavy metals in water bodies not only cause water quality deterioration and affect the growth and reproduction of freshwater aquatic organisms such as fish, shrimp, and crabs, but also accumulate in the food chain. The accumulation of heavy metals in the human body can cause damage to multiple organs, blood vessels, and nerves. Heavy metal emissions and the resulting environmental impacts have become a global environmental problem. This technology can be used for the prevention, control, and management and restoration of tailings ponds, industrial circulating water pools, and natural water environments with high heavy metal ion content.

[0003] Tailings ponds refer to places formed by damming the valley mouth or enclosing land to store tailings or other industrial wastes discharged from metal or non-metal mines after ore sorting. Ore dressing plants are large users of water, usually requiring 4 to 6 tons of water for each ton of raw ore processed, and some gravity separation plants even require up to 10 to 20 tons of water. This water is discharged into the tailings pond along with the tailings. After clarification and natural purification, most of the water can be reused for ore dressing production. However, there is no special treatment process for heavy metal ions in the tailings pond. The circulating water pool is mainly used to store cooling water required for cold exchange of equipment and plays the role of circulation, cooling (cooling tower) and storage. For the metallurgical industry, electroplating industry, and steel smelting industry, the circulating water pool contains excessive heavy metals. In the process of using it as cooling water, in order to meet the industrial circulating water standards, the heavy metal ions in the water must be removed.

[0004] Chemical precipitation and physical adsorption have great potential in treating heavy metals in water bodies. These purely physical and chemical methods have high removal rates, but these two methods not only have high restoration costs and poor ecological benefits, but also have high technical requirements and are prone to cause secondary pollution to water bodies and sometimes even damage the ecosystem. Therefore, people need a healthier, greener and safer heavy metal restoration method.

[0005] The above problem can be solved by coupling iron-carbon micro-electrolysis technology with floating plants to absorb heavy metals in the water. Compared with traditional remediation methods, the use of aquatic plants to repair heavy metals in water bodies is considered to have good application prospects. When hydroponic plants grow, their roots will adsorb and migrate heavy metals in the water body. By regularly harvesting aquatic plants, heavy metals can be removed from the water body. It has the advantages of no secondary pollution, low cost, good visual landscape, sustainability and easy implementation.

[0006] For example, patent CN113387504B discloses a farmland drainage ditch purification system combining an ecological floating bed with iron-carbon micro-electrolysis, including a floating bed composed of a floating bed base and a plurality of floating bed planting baskets, and a floating bed plant, a biofilm mounted on the floating bed plant, an iron-carbon micro-electrolysis device and submerged plants, and a variety of physical, chemical and biological methods to efficiently remove organic matter and nitrogen and phosphorus pollutants in the water, thereby achieving farmland drainage water purification and reducing agricultural non-point source pollution. At the same time, it solves the problem of floating bed plants and submerged plants dormant and withered during the dry season of the channel and the easy oxidation and failure of iron-carbon micro-electrolysis fillers. However, the system has the problem of complex replacement of iron-carbon micro-electrolysis materials, and the utilization rate of iron-carbon micro-electrolysis materials is not high. Summary of the invention

[0007] In view of the above-mentioned problems, the present invention provides an artificial floating island of iron-carbon micro-electrolysis coupled with floating plants and a method for using the same.

[0008] The technical solution of the present invention is:

[0009] An artificial floating island of iron-carbon micro-electrolysis coupled with floating plants, comprising a floating plate, a plurality of iron-carbon micro-electrolysis cavities arranged at equal intervals below the floating plate, and a plurality of iron-carbon micro-electrolysis plates arranged at equal intervals below the floating plate, wherein the iron-carbon micro-electrolysis cavities and the iron-carbon micro-electrolysis plates are arranged alternately at intervals;

[0010] The permeable net provided outside the iron-carbon micro-electrolysis cavity is detachably connected to the bottom of the floating plate, and a plurality of plant growth holes are provided on both sides of the floating plate surface corresponding to the iron-carbon micro-electrolysis cavity;

[0011] The surface of the floating plate corresponding to the iron-carbon micro-electrolysis plate is provided with a groove, and a placement rack for placing the iron-carbon micro-electrolysis plate is provided below the groove, and the placement rack is detachably connected to the bottom of the floating plate;

[0012] A crushing assembly for crushing the iron-carbon micro-electrolysis plate is provided in the middle part above the floating plate, and the crushing assembly includes a slider sliding along the middle part of the floating plate, a crushing cylinder is provided on the upper surface of the slider, a fixed frame is provided on each side of the slider, and a stirring motor is fixedly connected to the ends of the two fixed frames corresponding to the top of the slider, a crushing roller is provided at the output end below the stirring motor, and the crushing roller extends to the inside of the crushing cylinder, a through hole is provided in the middle part of the floating plate surface corresponding to each of the iron-carbon micro-electrolysis cavities, and a feeding port is provided at the bottom of the crushing cylinder that penetrates the slider and extends to the bottom of the slider.

[0013] Furthermore, the floating plate and the placement rack are made of polypropylene foam material, the permeable net is made of PE material, a plurality of openings are provided on the surface of the iron-carbon micro-electrolysis plate, and the thickness of the iron-carbon micro-electrolysis plate is 4 to 6 mm.

[0014] Description: The floating plate and the placement frame are both made of strong buoyancy materials, so that the floating plate can float on the water surface. The openings on the surface of the iron-carbon micro-electrolysis plate can increase its specific surface area, enhance the contact effect between the sewage and it, and thus improve the purification effect.

[0015] Furthermore, there are 6 to 10 placement racks, the placement racks are arranged in a frame structure, and a plurality of blocking rods are arranged at equal intervals on both sides of the placement racks.

[0016] Note: The barrier rod is set to prevent the iron-carbon micro-electrolysis plate from falling out.

[0017] Furthermore, the number of the iron-carbon micro-electrolysis cavities is 6 to 10, and 3 to 6 plant growth holes are provided on both sides of the floating plate corresponding to each iron-carbon micro-electrolysis cavity.

[0018] Note: By rationally adjusting the number of iron-carbon micro-electrolysis cavities, a balance is ensured between the sewage treatment effect and the overall stability of the floating island.

[0019] Furthermore, two pulleys are respectively provided on both sides of the bottom of the slider, and the pulleys slide correspondingly in the slide grooves provided on the upper surface of the floating plate, the slide grooves are disconnected at the slots, and the diameter of the pulleys is greater than the width of the slots.

[0020] Description: The setting of pulleys and chutes enables the crushing assembly to move and pass through the slots smoothly.

[0021] Furthermore, an extension plate is provided on one side of the floating plate, a push rod motor is provided at the end of the extension plate, a telescopic rod is provided at the output end of the push rod motor, a clamping block is provided at the end of the telescopic rod, the clamping block is clamped and fixedly connected to the bottom of one of the fixed frames, the telescopic rod is arranged parallel to the two slide grooves, and a waterproof cover is provided on the outside of the push rod motor.

[0022] Description: The sliding of the crushing assembly is driven by the push rod motor.

[0023] Furthermore, the crushing roller is provided with a plurality of groups of blades with gradually decreasing lengths from top to bottom, and a 60-mesh screen is provided at the feed outlet.

[0024] Note: The iron-carbon micro-electrolysis secondary debris that meets the requirements after crushing will be filtered out through the sieve and reused.

[0025] The method for using the artificial floating island of iron-carbon micro-electrolysis coupled with floating plants described in any one of the above items comprises the following steps:

[0026] S1. Preparation of iron-carbon micro-electrolysis plate: grind sponge iron to 3-5 mm to obtain sponge iron powder, grind activated carbon to 2-3 mm to obtain activated carbon powder, mix the sponge iron powder, activated carbon powder and environmentally friendly glue in a mass ratio of 1-2:2-3:0.5-1 to obtain a mixed powder, place the mixed powder in a mold, then heat and keep warm at 120-140° C. for 2-3 h, and take out to obtain an iron-carbon micro-electrolysis plate;

[0027] S2. Construction of artificial floating islands: placing the floating plate in the sewage water to be treated, evenly placing the iron-carbon micro-electrolysis plates in each of the placement racks, and using the sponge iron and activated carbon inside the iron-carbon micro-electrolysis plates to form a primary cell to oxidize, flocculate, and adsorb and remove heavy metals in the sewage water;

[0028] S3, loop repair:

[0029] S3-1: After the iron-carbon micro-electrolysis plate is placed in the sewage water body for 2 to 3 months, the iron-carbon micro-electrolysis plate is taken out and crushed by the crushing assembly to obtain iron-carbon micro-electrolysis secondary debris. The iron-carbon micro-electrolysis secondary debris crushed in each of the placement racks is added into the corresponding through hole through the feed port and falls into the corresponding iron-carbon micro-electrolysis cavity. Aquatic plants are planted at each of the plant growth holes and fixed with iron-carbon micro-electrolysis secondary debris. A new iron-carbon micro-electrolysis plate is placed in the placement rack to carry out the next cycle of sewage water body restoration.

[0030] S3-2: 2 to 3 months after the next cycle of sewage water body restoration, the iron-carbon micro-electrolysis secondary debris in the iron-carbon micro-electrolysis cavity is taken out, and the iron-carbon micro-electrolysis plate is taken out again, crushed and placed in the iron-carbon micro-electrolysis cavity, and the aquatic plants are harvested, and aquatic plants are planted again in each of the plant growth holes and fixed with the iron-carbon micro-electrolysis secondary debris, and new iron-carbon micro-electrolysis plates are placed in the placement rack to achieve sewage water body circulation restoration.

[0031] Furthermore, the environmentally friendly glue is an isocyanate adhesive, and the aquatic plants are one or more of Siberian iris, water peanut, Sedum notoginseng, pennywort, yellow calamus, and water calamus.

[0032] The beneficial effects of the present invention are:

[0033] (1) The artificial floating island of iron-carbon micro-electrolysis coupled with floating plants of the present invention uses sponge iron and activated carbon as raw materials, realizes iron-carbon micro-electrolysis technology to treat pollutants in water and adsorb heavy metals, does not consume electricity resources, and reduces technical costs. The iron-carbon micro-electrolysis technology is coupled with floating plants to form an artificial floating island with dual purification functions, wherein the large specific surface area of ​​the iron-carbon micro-electrolysis plate can treat pollutants in the water, and the secondary debris of the iron-carbon micro-electrolysis plays a role in fixing the floating plants. The floating plants can absorb heavy metal ions in the water through their roots, thereby reducing the heavy metal content in the water.

[0034] (2) The artificial floating island of iron-carbon micro-electrolysis coupled with floating plants of the present invention is equipped with a special crushing component, which can crush the used iron-carbon micro-electrolysis plates and aquatic plants and reuse them as secondary debris of iron-carbon micro-electrolysis to continue sewage remediation. It is easy to use and can promptly dispose of the used iron-carbon micro-electrolysis plates and aquatic plants, thereby improving work efficiency.

[0035] (3) The method for using an artificial floating island of iron-carbon micro-electrolysis coupled with floating plants of the present invention defines in detail the circulation and repair period and specific parameters of the artificial floating island, thereby realizing efficient sewage treatment and stable operation. Compared with a simple iron-carbon micro-electrolysis floating island, the treatment efficiency is higher, less raw materials are used, and certain economic benefits can be achieved, especially when applied to tailings ponds and industrial circulating water pools, which promotes the construction of ecological civilization and the continuous high-quality development of industrial and mining enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the overall structure of an artificial floating island of iron-carbon micro-electrolysis coupled with floating plants of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of a crushing component of an artificial floating island of iron-carbon micro-electrolysis coupled with floating plants of the present invention;

[0038] Figure 3 This is a front view of an artificial floating island of iron-carbon micro-electrolysis coupled with floating plants of the present invention;

[0039] Figure 4 It is a top view of an artificial floating island of iron-carbon micro-electrolysis coupled with floating plants of the present invention;

[0040] Figure 5 It is a side view of an artificial floating island of iron-carbon micro-electrolysis coupled with floating plants of the present invention.

[0041] Among them, 1-floating plate, 11-plant growth hole, 12-slot, 13-through hole, 14-slide, 15-extension plate, 2-iron-carbon micro-electrolysis cavity, 3-iron-carbon micro-electrolysis plate, 31-placing rack, 32-opening, 33-blocking rod, 4-crushing assembly, 41-slider, 42-crushing cylinder, 43-fixed frame, 44-stirring motor, 45-crushing roller, 46-feeding port, 47-pulley, 48-blade, 49-screen, 5-push rod motor, 51-telescopic rod, 52-clamping block. DETAILED DESCRIPTION

[0042] Example 1

[0043] like Figure 1 and 5 As shown, an artificial floating island of iron-carbon micro-electrolysis coupled with floating plants comprises a floating plate 1, 8 equally spaced iron-carbon micro-electrolysis cavities 2 located below the floating plate 1, and a plurality of equally spaced iron-carbon micro-electrolysis plates 3 located below the floating plate 1, the iron-carbon micro-electrolysis cavities 2 and the iron-carbon micro-electrolysis plates 3 being arranged alternately at intervals, the floating plate 1 and the placement frame 31 being made of polypropylene foam material, a plurality of openings 32 being provided on the surface of the iron-carbon micro-electrolysis plate 3, and the thickness of the iron-carbon micro-electrolysis plate 3 being 5 mm;

[0044] like Figure 1 and 4 As shown, the permeable net provided on the outside of the iron-carbon micro-electrolysis cavity 2 is detachably connected to the bottom of the floating plate 1, and the permeable net is made of PE material. 48 plant growth holes 11 are provided on both sides of the surface of the floating plate 1 corresponding to the iron-carbon micro-electrolysis cavity 2, and 3 plant growth holes 11 are provided on both sides of the floating plate 1 corresponding to each iron-carbon micro-electrolysis cavity 2;

[0045] like Figure 1 and 3 As shown, the surface of the floating plate 1 corresponding to the iron-carbon micro-electrolysis plate 3 is provided with a groove 12, and a placement rack 31 for placing the iron-carbon micro-electrolysis plate 3 is provided below the groove 12. The placement rack 31 is detachably connected to the bottom of the floating plate 1. There are 7 placement racks 31, and 8 iron-carbon micro-electrolysis plates 3 are placed in one placement rack 31. The placement rack 31 is a frame structure, and 7 blocking rods 33 are evenly spaced on both sides of the placement rack 31;

[0046] like Figure 1 and 2As shown, a crushing assembly 4 for crushing the iron-carbon micro-electrolysis plate 3 is provided in the middle of the upper part of the floating plate 1, and the crushing assembly 4 includes a slider 41 sliding along the middle of the floating plate 1, a crushing barrel 42 is provided on the upper surface of the slider 41, and a fixing frame 43 is provided on each side of the slider 41, and a stirring motor 44 is fixedly connected to the ends of the two fixing frames 43 corresponding to the slider 41 directly above the slider, and a crushing roller 45 is provided at the output end below the stirring motor 44, and the crushing roller 45 extends to the inside of the crushing barrel 42, and a through hole 13 is provided in the middle of the surface of the floating plate 1 corresponding to each iron-carbon micro-electrolysis cavity 2, and a feeding port 46 is provided at the bottom of the crushing barrel 42 that penetrates the slider 41 and extends to the bottom of the slider 41, and the crushing roller 45 is provided with 5 groups of blades 48 of gradually decreasing length from top to bottom, located The length of the lower set of blades is 80% of the length of the upper set of blades. A 60-mesh screen 49 is provided at the feed port 46. Two pulleys 47 are provided on both sides of the bottom of the slider 41. The pulleys 47 slide correspondingly in the slide grooves 14 provided on the upper surface of the floating plate 1. The slide grooves 14 are disconnected at the slots 12, and the diameter of the pulley 47 is greater than the width of the slots 12. The diameter of the pulley 47 is 1.5 times the slot 12. An extension plate 15 is provided on one side of the floating plate 1. A push rod motor 5 is provided at the end of the extension plate 15. A telescopic rod 51 is provided at the output end of the push rod motor 5. A clamping block 52 is provided at the end of the telescopic rod 51. The clamping block 52 is clamped and fixedly connected to the bottom of one of the fixed frames 43. The telescopic rod 51 is arranged in parallel with the two slide grooves 14. A waterproof cover is provided on the outside of the push rod motor 5.

[0047] The stirring motor 44 and the push rod motor 5 are both commercially available products.

[0048] Example 2

[0049] The difference between this embodiment and embodiment 1 is that:

[0050] The thickness of the iron-carbon micro-electrolysis plate 3 is 4 mm.

[0051] Example 3

[0052] The difference between this embodiment and embodiment 1 is that:

[0053] The thickness of the iron-carbon micro-electrolysis plate 3 is 6 mm.

[0054] Example 4

[0055] The difference between this embodiment and embodiment 1 is that:

[0056] There are six iron-carbon micro-electrolysis cavities 2 , and four plant growth holes 11 are provided on both sides of the floating plate 1 corresponding to each iron-carbon micro-electrolysis cavity 2 , and there are six placement racks 31 .

[0057] Example 5

[0058] The difference between this embodiment and embodiment 1 is that:

[0059] There are ten iron-carbon micro-electrolysis cavities 2 , and six plant growth holes 11 are provided on both sides of the floating plate 1 corresponding to each iron-carbon micro-electrolysis cavity 2 , and there are ten placement racks 31 .

[0060] Example 6

[0061] This embodiment is a method for using an artificial floating island of iron-carbon micro-electrolysis coupled with floating plants in Embodiment 1, comprising the following steps:

[0062] S1, preparation of iron-carbon micro-electrolysis plate 3: take sponge iron and grind it into 4mm to obtain sponge iron powder, take activated carbon and grind it into 2.5mm to obtain activated carbon powder, mix the sponge iron powder, activated carbon powder and environmentally friendly glue in a mass ratio of 1.5:2.6:0.8, the environmentally friendly glue is isocyanate adhesive, and obtain a mixed powder, put the mixed powder into a mold, then heat and keep it at 130° C. for 2.5 hours, and take it out to obtain the iron-carbon micro-electrolysis plate 3;

[0063] S2. Construction of artificial floating island: placing the floating plate 1 in the sewage water to be treated, evenly placing the iron-carbon micro-electrolysis plates 3 in each placement rack 31, and using the sponge iron and activated carbon inside the iron-carbon micro-electrolysis plates 3 to form a primary cell to oxidize, flocculate, and adsorb and remove heavy metals in the sewage water;

[0064] S3, loop repair:

[0065] S3-1: After the iron-carbon micro-electrolysis plate 3 is placed in the sewage water body for 2.5 months, the iron-carbon micro-electrolysis plate 3 is taken out and crushed by the crushing assembly 4 to obtain iron-carbon micro-electrolysis secondary debris. The crushed iron-carbon micro-electrolysis secondary debris in each placement rack 31 is added to the corresponding through hole 13 through the feed port 46 and falls into the corresponding iron-carbon micro-electrolysis cavity 2. Aquatic plants are planted at each plant growth hole 11 and fixed with iron-carbon micro-electrolysis secondary debris. A new iron-carbon micro-electrolysis plate 3 is placed in the placement rack 31 to carry out the next cycle of sewage water body repair.

[0066] The aquatic plant is Siberian iris;

[0067] S3-2: After 2.5 months of the next cycle of sewage water body restoration, the iron-carbon micro-electrolysis secondary debris in the iron-carbon micro-electrolysis cavity 2 is taken out, and the iron-carbon micro-electrolysis plate 3 is taken out again, crushed and placed in the iron-carbon micro-electrolysis cavity 2, and the aquatic plants are harvested, and aquatic plants are planted again in each plant growth hole 11 and fixed with the iron-carbon micro-electrolysis secondary debris, and the new iron-carbon micro-electrolysis plate 3 is placed in the placement rack 31 to realize the recycling restoration of the sewage water body.

[0068] Example 7

[0069] The difference between this embodiment and embodiment 6 is that: S1, the specific parameters for preparing the iron-carbon micro-electrolysis plate 3 are different.

[0070] S1. Preparation of iron-carbon micro-electrolysis plate 3: Grind sponge iron into 3 mm to obtain sponge iron powder, grind activated carbon into 2 mm to obtain activated carbon powder, mix the sponge iron powder, activated carbon powder and environmentally friendly glue in a mass ratio of 1:2:0.5, where the environmentally friendly glue is isocyanate adhesive, to obtain a mixed powder, place the mixed powder in a mold, then heat and keep it warm at 120°C for 2 hours, and take it out to obtain the iron-carbon micro-electrolysis plate 3.

[0071] Example 8

[0072] The difference between this embodiment and embodiment 6 is that: S1, the specific parameters for preparing the iron-carbon micro-electrolysis plate 3 are different.

[0073] S1. Preparation of iron-carbon micro-electrolysis plate 3: Grind sponge iron into 5 mm to obtain sponge iron powder, grind activated carbon into 3 mm to obtain activated carbon powder, mix the sponge iron powder, activated carbon powder and environmentally friendly glue in a mass ratio of 2:3:1, where the environmentally friendly glue is isocyanate adhesive, to obtain a mixed powder, place the mixed powder in a mold, then heat and keep it at 140°C for 2 hours, and take it out to obtain the iron-carbon micro-electrolysis plate 3.

[0074] Note: In Examples 6 to 8, the mass ratios of sponge iron powder, activated carbon powder and environmentally friendly rubber are different and can be adjusted in equal proportions within the range given in the present invention.

[0075] Example 9

[0076] The difference between this embodiment and embodiment 6 is that: S3, the duration of each repair cycle during cyclic repair is different.

[0077] The sewage water body restoration period is 2 months.

[0078] Example 10

[0079] The difference between this embodiment and embodiment 6 is that: S3, the duration of each repair cycle during cyclic repair is different.

[0080] The sewage water body restoration period is 3 months.

[0081] Embodiment 11

[0082] The difference between this embodiment and embodiment 6 is that:

[0083] The aquatic plant is water peanut.

[0084] Example 12

[0085] The difference between this embodiment and embodiment 6 is that:

[0086] The aquatic plant is Sedum notoginseng.

[0087] Example 13

[0088] The difference between this embodiment and embodiment 6 is that:

[0089] The aquatic plant is pennywort.

[0090] Embodiment 14

[0091] The difference between this embodiment and embodiment 6 is that:

[0092] The aquatic plants are yellow calamus and water calamus.

[0093] Working principle: In combination with the method in Example 6, the working principle of the crushing component 4 is further explained below.

[0094] When performing S3 cycle repair, first turn on the push rod motor 5 to control the telescopic rod 51 to extend and retract, thereby driving the crushing assembly 4 to slide, and the pulley 47 slides in the slide groove 14, so that the crushing assembly 4 is located above the first through hole 13 and aligned with the feed opening 46, and then turn on the stirring motor 44 to drive the crushing roller 45 to rotate, and the blade 48 thereon cuts and crushes the iron-carbon micro-electrolysis plate 3 until the particle size is less than 60 meshes and then falls into the through hole 13 through the screen 49, enters the iron-carbon micro-electrolysis cavity 2 as secondary debris of iron-carbon micro-electrolysis, and plays a role in fixing aquatic plants;

[0095] After processing a group of iron-carbon micro-electrolysis plates 3 and aquatic plants, the push rod motor 5 is turned on again to control the telescopic rod 51 to extend and retract, thereby driving the crushing assembly 4 to slide, so that the crushing assembly 4 is located above the second through hole 13 and aligned with the discharge port 46, and the group of iron-carbon micro-electrolysis plates 3 is crushed in the same way, and the crushing process of 7 groups of iron-carbon micro-electrolysis plates 3 is completed by analogy. Since there are 7 groups of iron-carbon micro-electrolysis plates 3 and 8 groups of aquatic plants, a part of the iron-carbon micro-electrolysis plates 3 in the first 7 groups is reserved as the last group of iron-carbon micro-electrolysis secondary debris, and the harvested aquatic plants and the used iron-carbon micro-electrolysis secondary debris are uniformly transported to the hazardous waste landfill for safe landfill to avoid secondary pollution.

[0096] Experimental example

[0097] Next, we conduct simulation tests according to the methods in Example 6 and Example 11 to Example 13. The water body targeted by the test is tailings pond wastewater. The length of the selected floating plate 1 is 4m and the width is 3m. After three S3 cycle repairs, the heavy metal content in the water body and plants is detected. The results are as follows:

[0098] In Example 6, the Siberian iris has a 2+) removal rate can reach up to 91.44%, nickel ions (Ni 2+ ) removal rate can reach up to 90.44%, lead ions (Pb 2+ ) removal rate can reach up to 94.65%, zinc ions (Zn 2 + ) removal rate can reach up to 92.36%;

[0099] In Example 11, water peanuts have a 2+ ) removal rate can reach up to 96.22%, nickel ions (Ni 2+ ) removal rate can reach up to 90.77%, lead ions (Pb 2+ ) removal rate can reach up to 92.33%, zinc ions (Zn 2+ ) removal rate can reach up to 95.90%;

[0100] In Example 12, the effect of Sedum sedum on copper ions (Cu 2+ ) removal rate can reach up to 90.10%, nickel ions (Ni 2+ ) removal rate can reach up to 92.73%, lead ions (Pb 2+ ) removal rate can reach up to 98.84%, zinc ions (Zn 2+ ) removal rate can reach up to 97.78%;

[0101] In Example 13, the copper coin grass has a significant effect on the copper ion (Cu 2+ ) removal rate can reach up to 93.59%, nickel ions (Ni 2+ ) removal rate can reach up to 90.86%, lead ions (Pb 2+ ) removal rate can reach up to 87.43%, zinc ions (Zn 2+ ) removal rate can reach up to 98.25%;

[0102] It can be seen from the above results that although there are multiple heavy metal ions interfering with each other in the tailings pond wastewater, the method of the present invention can still effectively reduce the heavy metal content in the water.

[0103] Experimental Example 2

[0104] In addition, we also conducted a comparative test. Taking Example 6 as an example, the raw materials (sponge iron powder + activated carbon powder) used in this test were taken in the same amount to make three groups of iron-carbon micro-electrolysis plates 3 for single-method repair. After each repair cycle, they were completely replaced and the total repair time was the same. The results are as follows:

[0105] In the comparative example, the Siberian iris has a 2+ ) removal rate can reach up to 85.62%, nickel ions (Ni2+ ) removal rate can reach up to 83.37%, lead ions (Pb 2+ ) removal rate can reach up to 88.95%, zinc ions (Zn 2 + ) removal rate can reach up to 90.49%;

[0106] It can be seen that after adopting the cyclic repair method of the present invention, the removal rate of heavy metal ions is improved. This is because in the comparative example, there is a lack of the step of crushing the iron-carbon micro-electrolysis plate 3 and placing it in the iron-carbon micro-electrolysis cavity 2. When the iron-carbon micro-electrolysis plate 3 is used alone for water body repair, the effect is general, the electrolysis reaction is incomplete, and the contact area between the wastewater and the iron-carbon micro-electrolysis plate 3 is insufficient, which easily makes it impossible for a part of the material to play the role of oxidation, flocculation, and adsorption. Therefore, the present invention is more economically advantageous than the single method repair.

Claims

1. An artificial floating island of iron-carbon micro-electrolysis coupled with floating plants, characterized in that: It comprises a floating plate (1), a plurality of iron-carbon micro-electrolysis cavities (2) arranged at equal intervals below the floating plate (1), and a plurality of iron-carbon micro-electrolysis plates (3) arranged at equal intervals below the floating plate (1), wherein the iron-carbon micro-electrolysis cavities (2) and the iron-carbon micro-electrolysis plates (3) are arranged in an alternating manner; The permeable net provided outside the iron-carbon micro-electrolysis cavity (2) is detachably connected to the bottom of the floating plate (1), and a plurality of plant growth holes (11) are provided on both sides of the surface of the floating plate (1) corresponding to the iron-carbon micro-electrolysis cavity (2); The surface of the floating plate (1) corresponding to the iron-carbon micro-electrolysis plate (3) is provided with a groove (12), and a placement rack (31) for placing the iron-carbon micro-electrolysis plate (3) is provided below the groove (12), and the placement rack (31) is detachably connected to the bottom of the floating plate (1); A crushing assembly (4) for crushing the iron-carbon micro-electrolysis plate (3) is provided in the middle of the upper part of the floating plate (1), and the crushing assembly (4) includes a slider (41) sliding along the middle of the floating plate (1), and a crushing barrel (42) is provided on the upper surface of the slider (41), and a fixing frame (43) is provided on both sides of the slider (41), and a stirring motor (44) is fixedly connected to the ends of the two fixing frames (43) corresponding to the upper part of the slider (41), and a crushing roller (45) is provided at the output end below the stirring motor (44), and the crushing roller (45) extends to the inside of the crushing barrel (42), and a through hole (13) is provided in the middle of the surface of the floating plate (1) corresponding to each of the iron-carbon micro-electrolysis cavities (2), and a feeding port (46) penetrating the slider (41) and extending to the bottom of the slider (41) is provided at the bottom of the crushing barrel (42).

2. The artificial floating island of iron-carbon micro-electrolysis coupled with floating plants according to claim 1, characterized in that: The floating plate (1) and the placement rack (31) are made of polypropylene foam material, the water-permeable net is made of PE material, a plurality of openings (32) are provided on the surface of the iron-carbon micro-electrolysis plate (3), and the thickness of the iron-carbon micro-electrolysis plate (3) is 4 to 6 mm.

3. The artificial floating island of iron-carbon micro-electrolysis coupled with floating plants according to claim 1, characterized in that: There are 6 to 10 placement racks (31), and the placement racks (31) are arranged in a frame structure. A plurality of blocking rods (33) are arranged at equal intervals on both sides of the placement racks (31).

4. The artificial floating island of iron-carbon micro-electrolysis coupled with floating plants according to claim 1, characterized in that: The number of the iron-carbon micro-electrolysis cavities (2) is 6 to 10, and 3 to 6 plant growth holes (11) are respectively arranged on both sides of the floating plate (1) corresponding to each iron-carbon micro-electrolysis cavity (2).

5. The artificial floating island of iron-carbon micro-electrolysis coupled with floating plants according to claim 1, characterized in that: Two pulleys (47) are respectively provided on both sides of the bottom of the slider (41), and the pulleys (47) slide correspondingly in the slide grooves (14) provided on the upper surface of the floating plate (1), the slide grooves (14) are disconnected at the slots (12), and the diameter of the pulleys (47) is greater than the width of the slots (12).

6. The artificial floating island of iron-carbon micro-electrolysis coupled with floating plants according to claim 5, characterized in that: An extension plate (15) is provided on one side of the floating plate (1), a push rod motor (5) is provided at the end of the extension plate (15), a telescopic rod (51) is provided at the output end of the push rod motor (5), a clamping block (52) is provided at the end of the telescopic rod (51), the clamping block (52) is clamped and fixedly connected to the bottom of one of the fixing frames (43), the telescopic rod (51) is arranged in parallel with the two slide grooves (14), and a waterproof cover is provided on the outside of the push rod motor (5).

7. The artificial floating island of iron-carbon micro-electrolysis coupled with floating plants according to claim 1, characterized in that: The crushing roller (45) is provided with a plurality of groups of blades (48) with gradually decreasing lengths from top to bottom, and a 60-mesh screen (49) is provided at the feed outlet (46).

8. The method for using an artificial floating island of iron-carbon micro-electrolysis coupled with floating plants according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, preparation of iron-carbon micro-electrolysis plate (3): taking sponge iron and crushing it to 3-5 mm to obtain sponge iron powder, taking activated carbon and crushing it to 2-3 mm to obtain activated carbon powder, mixing the sponge iron powder, the activated carbon powder and the environmentally friendly glue in a mass ratio of 1-2:2-3:0.5-1 to obtain a mixed powder, placing the mixed powder in a mold, then heating and keeping it warm at 120-140° C. for 2-3 hours, and taking it out to obtain the iron-carbon micro-electrolysis plate (3); S2, artificial floating island construction: placing the floating plate (1) in the sewage water body to be treated, evenly placing the iron-carbon micro-electrolysis plate (3) in each of the placement racks (31), and utilizing the sponge iron and activated carbon inside the iron-carbon micro-electrolysis plate (3) to form a primary cell to oxidize, flocculate, and adsorb and remove heavy metals in the sewage water body; S3, loop repair: S3-1: After the iron-carbon micro-electrolysis plate (3) has been placed in the sewage water body for 2 to 3 months, the iron-carbon micro-electrolysis plate (3) is taken out and crushed by the crushing assembly (4) to obtain iron-carbon micro-electrolysis secondary debris. The iron-carbon micro-electrolysis secondary debris crushed in each of the placement racks (31) is added into the corresponding through hole (13) through the discharge port (46) and falls into the corresponding iron-carbon micro-electrolysis cavity (2). Aquatic plants are planted at each of the plant growth holes (11) and fixed with the iron-carbon micro-electrolysis secondary debris. A new iron-carbon micro-electrolysis plate (3) is placed in the placement rack (31) to carry out the next cycle of sewage water body restoration. S3-2: After 2 to 3 months of the next cycle of sewage water body restoration, the iron-carbon micro-electrolysis secondary debris in the iron-carbon micro-electrolysis cavity (2) is taken out, and the iron-carbon micro-electrolysis plate (3) is taken out again, crushed and placed in the iron-carbon micro-electrolysis cavity (2), and the aquatic plants are harvested, and aquatic plants are planted again in each of the plant growth holes (11) and fixed with the iron-carbon micro-electrolysis secondary debris, and a new iron-carbon micro-electrolysis plate (3) is placed in the placement rack (31) to achieve sewage water body circulation restoration.

9. The method for using an artificial floating island of iron-carbon micro-electrolysis coupled with floating plants according to claim 8, characterized in that: The environmentally friendly glue is an isocyanate adhesive, and the aquatic plants are one or more of Siberian iris, water peanut, sedum notoginseng, pennywort, yellow calamus, and water calamus.

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