Restoration material for simultaneously treating bottom mud and water body as well as preparation method and application thereof

Abstract

The invention relates to the technical field of water pollution treatment, in particular to a repairing material for simultaneously treating bottom mud and water and a preparation method and application thereof.The method for preparing the repairing material comprises the steps that Al-MOFs and mixed activated carbon powder are added into an organic solvent, cooling, filtering, washing and drying are conducted after oscillation, and a porous activated carbon material is obtained; adding the porous activated carbon material into a calcium lactate solution, stirring, adding a sodium alginate solution, carrying out forward spheroidization, filtering, washing and drying to obtain porous activated carbon material gel balls; adding the porous activated carbon material gel balls and a complex microbial inoculant into water, carrying out shake culture in a shaker, filtering, washing and drying to obtain a bacteria-containing porous material; and adding a sodium alginate solution into the bacteria-containing porous material, stirring, dropwise adding a calcium lactate solution, carrying out reverse spheroidization, filtering, washing and drying to obtain the repair material. The remediation material has an excellent water body and bottom mud remediation effect while not causing burden on the ecological environment of the water body.

Description

Technical Field

[0001] The present application relates to the technical field of water pollution control, and specifically to a repair material for simultaneously treating sediment and water bodies, and a preparation method and application thereof. Background Art

[0002] Previously, with the expansion of urbanization, the increase in urban population, inadequate water pollution control measures, and backward treatment equipment, the amount of industrial, agricultural, and domestic wastewater in urban water bodies has continued to increase, causing the water environment to suffer from organic pollution that exceeds its self-purification capacity. At the same time, due to insufficient water power and poor water flow, pollutants continue to accumulate in the bottom mud of the water body, and the bottom mud and the overlying water body continue to migrate and transfer pollutants, eventually forming black and smelly water bodies, which have had a serious impact on the city's appearance, ecological environment, and residents' health. In recent years, with the improvement of environmental awareness and the strengthening of environmental supervision, the discharge of exogenous pollution such as industrial, agricultural, and domestic wastewater has been controlled, but the bottom mud as endogenous pollution is still the main source of pollution.

[0003] For sediment treatment, a variety of treatment technologies including physical remediation, chemical remediation and biological remediation have been developed. Although physical technology has low technical cost and obvious effect, it does not fundamentally solve endogenous pollution and is easily disturbed and eroded by water bodies; chemical remediation is fast and effective, but it is easy to cause harm to organisms in the water body; biological remediation has a small degree of harm, but the repair time is long and it is easily affected by temperature. In order to achieve a better repair effect on sediment, there is currently a repair method that uses multiple treatment technologies at the same time. For example, the prior art CN112441713B provides an in-situ repair composite material and an in-situ treatment and repair method for contaminated sediment. However, its specific technical solution is to make the chemical repair material and the biological repair material separately and use them in sequence. The preparation and use steps are relatively cumbersome, and a large amount of cement is added to the repair agent during the preparation process. When used, it is easy to cause the mud and sand layer in the water body to be covered by cement, making it difficult to grow plants, microorganisms and fish with water purification functions, etc., resulting in the difficulty in restoring the purification capacity of the water body itself.

[0004] Therefore, a new repair material is needed that can repair water bodies and bottom sediments without affecting the water body's own purification capacity. Summary of the invention

[0005] The problem that this application aims to solve is to provide a repair material that can simultaneously treat bottom sediment and water bodies, and a preparation method and application thereof, which will not burden the ecological environment of the water body and have excellent water body and bottom sediment repair effects.

[0006] In order to solve the above technical problems, this application adopts the following technical solutions:

[0007] In one aspect, the present application provides a method for preparing a restoration material for simultaneously treating sediment and water, comprising the following steps:

[0008] Al-MOFs and mixed activated carbon powder are dispersed in an organic solvent, shaken and cooled to room temperature, and then first filtered, first washed and first dried to obtain an aluminum-based MOF porous activated carbon material;

[0009] The aluminum-based MOF porous activated carbon material is added to a first calcium lactate solution for first stirring, a first sodium alginate solution is added during the first stirring, and after forward spheroidization, a second filtration, a second washing, and a second drying are performed to obtain aluminum-based MOF porous activated carbon material gel balls;

[0010] The aluminum-based MOF porous activated carbon material gel ball and the composite bacterial agent are added into water, and after being placed in a shaker for shaking culture, a third filtration, a third washing and a third drying are performed to obtain a bacteria-containing porous material;

[0011] The bacteria-containing porous material is added to a second sodium alginate solution and subjected to a second stirring. During the second stirring, a second calcium lactate solution is added dropwise. After reverse spheroidization, a fourth filtration, a fourth washing and a fourth drying are performed to obtain the repair material for simultaneously treating sediment and water.

[0012] Furthermore, the Al-MOFs include one of MIL-53(Al) and CAU-1.

[0013] Furthermore, the mixed activated carbon powder includes wood activated carbon powder, coal activated carbon powder and fruit shell activated carbon powder.

[0014] Furthermore, the composite bacterial agent includes photosynthetic bacteria, Bacillus, phosphorus-fixing bacteria, denitrifying bacteria and nitrate-reducing bacteria.

[0015] Furthermore, the weight ratio of the Al-MOFs, the activated carbon powder and the composite bacterial agent is 2:(2-4):(1-2).

[0016] Furthermore, the weight ratio of the wood activated carbon powder, the coal activated carbon powder and the fruit shell activated carbon powder is (10-20):(5-15):(3-7).

[0017] Furthermore, the weight ratio of the photosynthetic bacteria, the Bacillus, the phosphate-fixing bacteria, the denitrifying bacteria and the nitrate-reducing bacteria is (5-9):(8-16):(9-21):(3-7):(2-6).

[0018] Furthermore, the concentration of the first sodium alginate solution and the second sodium alginate solution is 1.0-2.0 wt %.

[0019] Furthermore, the concentration of the first calcium lactate solution and the second calcium lactate solution is 2.0-3.0 wt %.

[0020] Furthermore, the organic solvent includes one of ethanol and dimethylformamide.

[0021] Furthermore, the water includes ddH2O.

[0022] Furthermore, the oscillation method includes ultrasonic oscillation, the oscillation temperature is 160-180° C., and the oscillation time is 24-36 hours.

[0023] Furthermore, the temperature of the shaking culture is 35-37° C., the speed of the shaking culture is 160-180 rpm, and the time of the shaking culture is 48-72 h.

[0024] On the other hand, the present application provides a restoration material prepared by the above method for simultaneously treating sediment and water bodies.

[0025] On the other hand, the present application provides the application of the above method or the above repair material.

[0026] Furthermore, the application includes one of the restoration of water bodies, restoration of bottom sediments, and simultaneous restoration of water bodies and bottom sediments.

[0027] This application has the following beneficial effects:

[0028] 1. The remediation material for treating both sediment and water provided in this application uses Al-MOFs as a carrier material to provide adsorption sites for mixed activated carbon powder. After the porous adsorption material and the activated carbon material are organically combined, the remediation material's ability to clean up pollutants such as organic and inorganic substances in water and sediment is greatly enhanced.

[0029] 2. The restoration material for treating both sediment and water bodies provided in the present application utilizes positive spheroidization to form an ultra-thin and tough gel isolation film on the surface of the aluminum-based MOF porous activated carbon material during the preparation process, which can separate the composite bacterial agent from the aluminum-based MOF porous activated carbon material, thereby preventing the porous adsorption material from affecting the restoration ability of the composite bacterial agent.

[0030] 3. The restoration material for treating sediment and water at the same time provided in the present application utilizes a thicker gel outer film formed by reverse spheroidization during the preparation process to include the composite bacterial agent and the aluminum-based MOF porous activated carbon, thereby improving the storage stability of the restoration material.

[0031] 4. When the restoration material for treating both sediment and water provided in the present application is used, the outer gel membrane can be ruptured by friction of the hard components in the sediment under the influence of water movement, thereby releasing the composite bacterial agent inside.

[0032] 5. The restoration material for treating both sediment and water provided in this application is made of materials with good biocompatibility such as Al-MOFs, activated carbon powder and sodium alginate gel. It not only has excellent sediment and water restoration capabilities in the initial stage of use, but also has the potential to provide growth and attachment space for water body restoration biological communities. DETAILED DESCRIPTION

[0033] The technical solutions in some embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments provided by the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present application.

[0034] Example 1

[0035] Prepare the mixed activated carbon powder as follows:

[0036] S11. Add 10 parts of wood activated carbon particles, 5 parts of coal activated carbon particles and 3 parts of fruit shell activated carbon particles into a grinder and grind for 1 hour, then sieve with a 325-mesh sieve, collect the sieved powder, and obtain the mixed activated carbon powder.

[0037] Example 2

[0038] Prepare the mixed activated carbon powder as follows:

[0039] S11. Add 15 parts of wood activated carbon particles, 10 parts of coal activated carbon particles and 5 parts of fruit shell activated carbon particles into a grinder and grind for 1 hour, then sieve with a 325-mesh sieve, collect the sieved powder, and obtain the mixed activated carbon powder.

[0040] Example 3

[0041] Prepare the mixed activated carbon powder as follows:

[0042] S11. 20 parts of wood activated carbon particles, 15 parts of coal activated carbon particles and 7 parts of fruit shell activated carbon particles were added to a grinder and ground for 1 hour, then sieved using a 325-mesh sieve, and the sieved powder was collected to obtain the mixed activated carbon powder.

[0043] Example 4

[0044] Prepare the compound bacterial agent according to the following steps:

[0045] S21. Add 5 parts of photosynthetic bacteria, 8 parts of Bacillus, 9 parts of phosphate-fixing bacteria, 3 parts of denitrifying bacteria and 2 parts of nitrate-reducing bacteria into 50 parts of deionized water, perform ultrasonic vibration for 2 hours, and then freeze-dry to obtain the composite bacterial agent.

[0046] Example 5

[0047] Prepare the compound bacterial agent according to the following steps:

[0048] S21. Add 7 parts of photosynthetic bacteria, 12 parts of Bacillus, 15 parts of phosphate-fixing bacteria, 5 parts of denitrifying bacteria and 4 parts of nitrate-reducing bacteria to 50 parts of deionized water, perform ultrasonic vibration for 2 hours, and then freeze-dry to obtain the composite bacterial agent.

[0049] Example 6

[0050] Prepare the compound bacterial agent according to the following steps:

[0051] S21. Add 9 parts of photosynthetic bacteria, 16 parts of Bacillus, 21 parts of phosphate-fixing bacteria, 7 parts of denitrifying bacteria and 6 parts of nitrate-reducing bacteria to 50 parts of deionized water, perform ultrasonic vibration for 2 hours, and then freeze-dry to obtain the composite bacterial agent.

[0052] Example 7

[0053] Follow these steps to prepare remediation materials for treating both sediment and water:

[0054] S31. 20 parts of MIL-53 (Al) and 20 parts of the mixed activated carbon powder prepared in Example 1 were dispersed in 100 parts of ethanol, ultrasonically oscillated at 160 ° C for 24 hours, cooled to room temperature, and then filtered, washed three times with anhydrous ethanol and air-dried to obtain an aluminum-based MOF porous activated carbon material;

[0055] S32. The aluminum-based MOF porous activated carbon material is added to 300 parts of a 2.0 wt% calcium lactate solution and a magnetic stirrer is turned on. During the magnetic stirring process, 120 parts of a 1.0 wt% sodium alginate solution are added. After positive spheroidization, the mixture is filtered and then washed three times with ddH2O and the surface moisture is air-dried to obtain aluminum-based MOF porous activated carbon material gel balls.

[0056] S33. The aluminum-based MOF porous activated carbon material gel ball and 10 parts of the composite bacterial agent prepared in Example 4 were added to 200 parts of ddH2O, and placed in a shaker at 180 rpm for 48 hours at a temperature of 35°C, filtered, and then washed three times with ddH2O and air-dried to obtain a bacteria-containing porous material;

[0057] S34. Add the bacteria-containing porous material into 100 parts of 1.0wt% sodium alginate solution and turn on the magnetic stirrer. During the magnetic stirring, add 300 parts of 2.0wt% calcium lactate solution. After reverse spheroidization, filter and wash three times with ddH2O and air-dry the surface moisture to obtain the repair material for simultaneously treating sediment and water.

[0058] Example 8

[0059] Follow these steps to prepare remediation materials for treating both sediment and water:

[0060] S31. 20 parts of MIL-53 (Al) and 30 parts of the mixed activated carbon powder prepared in Example 2 were dispersed in 100 parts of ethanol, ultrasonically oscillated at 170 ° C for 30 hours, cooled to room temperature, and then filtered, washed three times with anhydrous ethanol and air-dried to obtain an aluminum-based MOF porous activated carbon material;

[0061] S32. The aluminum-based MOF porous activated carbon material is added to 300 parts of a 2.5wt% calcium lactate solution and a magnetic stirrer is turned on. During the magnetic stirring, 100 parts of a 1.5wt% sodium alginate solution are added. After positive spheroidization, the mixture is filtered and then washed three times with ddH2O and the surface moisture is air-dried to obtain aluminum-based MOF porous activated carbon material gel balls.

[0062] S33. The aluminum-based MOF porous activated carbon material gel ball and 15 parts of the composite bacterial agent prepared in Example 5 were added to 200 parts of ddH2O, and placed in a shaker at 170 rpm for 36 hours at a temperature of 36°C, filtered, and then washed three times with ddH2O and air-dried to obtain a bacteria-containing porous material;

[0063] S34. Add the bacteria-containing porous material into 120 parts of 1.5wt% sodium alginate solution and turn on the magnetic stirrer. During the magnetic stirring, add 300 parts of 2.5wt% calcium lactate solution. After reverse spheroidization, filter and wash three times with ddH2O and air-dry the surface moisture to obtain the repair material for treating both sediment and water.

[0064] Example 9

[0065] Follow these steps to prepare remediation materials for treating both sediment and water:

[0066] S31. 20 parts of CAU-1 and 40 parts of the mixed activated carbon powder prepared in Example 3 were dispersed in 100 parts of dimethylformamide, ultrasonically oscillated at 180 ° C for 36 hours, cooled to room temperature, and then filtered, washed three times with dimethylformamide and air-dried to obtain an aluminum-based MOF porous activated carbon material;

[0067] S32. The aluminum-based MOF porous activated carbon material is added to 320 parts of a 3.0 wt% calcium lactate solution and a magnetic stirrer is turned on. During the magnetic stirring, 100 parts of a 2.0 wt% sodium alginate solution are added. After positive spheroidization, the mixture is filtered and then washed three times with ddH2O and the surface moisture is air-dried to obtain aluminum-based MOF porous activated carbon material gel balls.

[0068] S33. The aluminum-based MOF porous activated carbon material gel ball and 20 parts of the composite bacterial agent prepared in Example 6 were added to 200 parts of ddH2O, and placed in a shaker at 160 rpm for 72 hours at a temperature of 37°C, filtered, and then washed three times with ddH2O and air-dried to obtain a bacteria-containing porous material;

[0069] S34. Add the bacteria-containing porous material into 100 parts of 2.0wt% sodium alginate solution and turn on the magnetic stirrer. During the magnetic stirring, add 320 parts of 3.0wt% calcium lactate solution. After reverse spheroidization, filter and wash three times with ddH2O and air-dry the surface moisture to obtain the repair material for treating both sediment and water.

[0070] Comparative Example 1

[0071] Prepare the restorative material as follows:

[0072] The method for preparing the repair material in this comparative example refers to Example 7; wherein the difference between Comparative Example 1 and Example 7 is only that:

[0073] In S31, Al-MOFs are replaced with zeolites.

[0074] Comparative Example 2

[0075] Prepare the restorative material as follows:

[0076] S41. 20 parts of MIL-53 (Al) were added to 300 parts of 2.0 wt% calcium lactate solution and the magnetic stirrer was turned on. During the magnetic stirring process, 120 parts of 1.0 wt% sodium alginate solution were added. After positive spheroidization, the mixture was filtered and then washed three times with ddH2O and the surface moisture was air-dried to obtain aluminum-based MOF porous activated carbon material gel spheres.

[0077] S42. The aluminum-based MOF porous activated carbon material gel ball and 10 parts of the composite bacterial agent prepared in Example 4 were added to 200 parts of ddH2O, and placed in a shaker at 180 rpm for 48 hours at a temperature of 35°C, filtered, and then washed three times with ddH2O and air-dried to obtain a bacteria-containing porous material;

[0078] S43. Add the bacteria-containing porous material into 100 parts of 1.0wt% sodium alginate solution and turn on the magnetic stirrer. During the magnetic stirring, add 300 parts of 2.0wt% calcium lactate solution. After reverse spheroidization, filter and wash three times with ddH2O and air-dry the surface moisture to obtain the repair material.

[0079] Comparative Example 3

[0080] Prepare the restorative material as follows:

[0081] S51. 20 parts of MIL-53 (Al) and 20 parts of the mixed activated carbon powder prepared in Example 1 were dispersed in 100 parts of ethanol, ultrasonically oscillated at 160 ° C for 24 hours, cooled to room temperature, and then filtered, washed three times with anhydrous ethanol and air-dried to obtain an aluminum-based MOF porous activated carbon material;

[0082] S52. The aluminum-based MOF porous activated carbon material and 10 parts of the composite bacterial agent prepared in Example 4 were added to 200 parts of ddH2O, and placed in a shaker at 180 rpm for 48 hours at a temperature of 35°C, filtered, and then washed three times with ddH2O and air-dried to obtain a bacteria-containing porous material;

[0083] S53. Add the bacteria-containing porous material into 100 parts of 1.0wt% sodium alginate solution and turn on the magnetic stirrer. During the magnetic stirring, add 300 parts of 2.0wt% calcium lactate solution. After reverse spheroidization, filter and wash three times with ddH2O and air-dry the surface moisture to obtain the repair material.

[0084] Comparative Example 4

[0085] Prepare the restorative material as follows:

[0086] S61. 10 parts of the composite bacterial agent prepared in Example 4 were added to 200 parts of ddH2O, and the mixture was placed in a shaker at 180 rpm and cultured at 35 ° C for 48 h, then filtered, washed three times with ddH2O and air-dried to obtain a porous material containing bacteria;

[0087] S62. Add the bacteria-containing porous material into 100 parts of 1.0wt% sodium alginate solution and turn on the magnetic stirrer. During the magnetic stirring, add 300 parts of 2.0wt% calcium lactate solution. After reverse spheroidization, filter and wash three times with ddH2O and air-dry the surface moisture to obtain the repair material.

[0088] Experimental Example 1 Verification of the ammonia nitrogen removal effect of the remediation material that simultaneously treats sediment and water

[0089] Take 1g of the repair materials prepared in Examples 7 to 9 and Comparative Examples 1 to 4 respectively and add them to 100mL of ammonia nitrogen solution or methylene blue solution with a concentration of 100mg / L. The pH of the ammonia nitrogen solution and the methylene blue solution is adjusted to 7 in advance using hydrochloric acid or sodium hydroxide. Then put the ammonia nitrogen solution or the methylene blue solution into a constant temperature oscillator at 25°C and oscillate and adsorb at a speed of 200r / min for 150min. After the adsorption is completed, the removal rate of ammonia nitrogen compounds is measured and calculated using the Nessler reagent method, or the removal rate of methylene blue is measured and calculated using the methylene blue spectrophotometry method. The results are shown in Table 1

[0090] Table 1:

[0091]

[0092]

[0093] According to Table 1, the remediation material of the present application for treating both sediment and water bodies has excellent removal effects on ammonia nitrogen compounds and methylene blue, among which Example 9 has the best removal effect, with an ammonia nitrogen removal rate of 43.1% and a methylene blue removal rate of 39.8% in only 150 minutes. In other words, the remediation material of the present application has excellent water treatment effects.

[0094] Experimental Example 2 Simulation experiment of river treatment of restoration materials for simultaneous treatment of sediment and water

[0095] River water and surface sediments were collected from a secondary river in a city in Sichuan, and experiments were carried out in a river simulation device. The reactor size was 5m×1m×0.5m, and the reactor material was transparent tempered glass. The thickness of the simulated sediment was 15cm, and the thickness of the simulated water body was 20cm. A 20cm baffle was set at the simulated downstream of the reactor to prevent the sediment and repair materials from being washed away. The reactor was equipped with a water circulation system, a water motion simulation system, an energy dissipation plate, and a laminar drainage pipe to simulate the real situation of the river. At the same time, an aeration device was used to continuously aerate the river water. Two sampling ports were set at the simulated downstream of the reactor, at heights of 13cm and 25cm respectively, and the sampling ports were numbered 1 and 2 from bottom to top. 65 g of the repair materials prepared in Examples 7 to 9 and Comparative Examples 1 to 4 were added to the reactor respectively. Samples were taken from two sampling ports at 0 h, 48 h and 96 h after the addition of the repair materials. The total organic carbon (TOC), total phosphorus (TP) and total phosphorus (TN) contents at the two sampling ports were tested. The test results are shown in Table 2.

[0096] Table 2:

[0097]

[0098] According to Table 2, the repair materials provided in this application can produce significant repair effects on water bodies and bottom sediments at the same time, and the repair effect is very rapid, and most pollutants in water bodies and bottom sediments can be treated in just three days.

[0099] In summary, the restoration material provided by the present application for treating both sediment and water at the same time uses Al-MOFs and activated carbon powder with good biocompatibility as raw materials to prepare aluminum-based MOF porous activated carbon materials, and uses sodium alginate gel to wrap the composite bacterial agent and the aluminum-based MOF porous activated carbon material together in a non-contact form, which can avoid the aluminum-based MOF porous activated carbon material affecting the release of the composite bacterial agent. When used, this restoration material can quickly treat pollutants such as inorganic compounds and organic compounds in water, and has excellent cleaning capabilities. One of the raw materials of the restoration material provided by the present application is sodium alginate gel. As a degradable coating material, sodium alginate gel can expose the internal porous material to the sediment after degradation. As a material with good biocompatibility, the porous material also has the potential to provide growth and attachment space for subsequent water body restoration of biological communities, and is a material with great application value and development potential.

[0100] The above is only a preferred embodiment of the present application. It should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge in the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present application, and shall be within the scope of protection of the claims attached to the present application.

Claims

1. A method for preparing a restoration material for treating sediment and water simultaneously, characterized in that: The following steps are involved: Al-MOFs and mixed activated carbon powder are dispersed in an organic solvent, shaken and cooled to room temperature, and then first filtered, first washed and first dried to obtain an aluminum-based MOF porous activated carbon material; The aluminum-based MOF porous activated carbon material is added to a first calcium lactate solution for first stirring, a first sodium alginate solution is added during the first stirring, and after forward spheroidization, a second filtration, a second washing, and a second drying are performed to obtain aluminum-based MOF porous activated carbon material gel balls; The aluminum-based MOF porous activated carbon material gel ball and the composite bacterial agent are added into water, and after being placed in a shaker for shaking culture, a third filtration, a third washing and a third drying are performed to obtain a bacteria-containing porous material; The bacteria-containing porous material is added to the second sodium alginate solution, and a second stirring is performed. During the second stirring, a second calcium lactate solution is added dropwise, and after reverse spheroidization, a fourth filtration, a fourth washing, and a fourth drying are performed to obtain the repair material for treating both the bottom mud and the water body at the same time; Wherein, the Al-MOFs include one of MIL-53 (Al) and CAU-1; And / or, the mixed activated carbon powder includes wood activated carbon powder, coal activated carbon powder and fruit shell activated carbon powder; And / or, the composite bacterial agent includes photosynthetic bacteria, Bacillus, phosphate-fixing bacteria, denitrifying bacteria and nitrate-reducing bacteria.

2. The method according to claim 1, characterized in that The weight ratio of the Al-MOFs, the activated carbon powder and the composite bacterial agent is 2:(2-4):(1-2); And / or, the weight ratio of the wood activated carbon powder, the coal-based activated carbon powder and the fruit shell activated carbon powder is (10-20):(5-15):(3-7); And / or, the weight ratio of the photosynthetic bacteria, the Bacillus, the phosphate-fixing bacteria, the denitrifying bacteria and the nitrate-reducing bacteria is (5-9):(8-16):(9-21):(3-7):(2-6).

3. The method according to claim 1, characterized in that: The concentration of the first sodium alginate solution and the second sodium alginate solution is 1.0-2.0 wt %; And / or, the concentration of the first calcium lactate solution and the second calcium lactate solution is 2.0-3.0 wt %.

4. The method according to claim 1, characterized in that: The organic solvent includes one of ethanol and dimethylformamide; And / or, the water comprises ddH2O.

5. The method according to claim 1, characterized in that The oscillation method includes ultrasonic oscillation, the oscillation temperature is 160-180°C, and the oscillation time is 24-36h; And / or, the temperature of the shaking culture is 35-37° C., the speed of the shaking culture is 160-180 rpm, and the time of the shaking culture is 48-72 h.

6. The repair material for treating sediment and water simultaneously prepared by the method according to any one of claims 1 to 5.

7. Use of the method according to any one of claims 1 to 5 or the repair material according to claim 6.

8. The use according to claim 7, characterized in that: It includes one of the following: water body restoration, bottom sediment restoration, and simultaneous restoration of water body and bottom sediment.

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