A biomimetic water treatment material

Abstract

A biomimetic water treatment material includes magnetic sea urchin-type carbides. The artificial material prepared by this invention has high surface roughness and good hydrophilicity, which can quickly combine with sludge. The sea urchin-type structure on the surface can promote the formation of biofilm, and the density of the material can be controlled to facilitate sedimentation. The magnetic material on the surface can be recovered by a magnet. The water treatment material prepared by this invention enhances the coagulation effect of sludge and helps to rapidly aggregate and settle suspended solids and pollutants.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and specifically relates to a biomimetic water treatment material. Background Technology

[0002] Aerobic granular sludge technology offers advantages such as good solid-liquid separation, short settling time, and high sludge concentration in wastewater treatment. However, the formation cycle of aerobic granular sludge is long, and changes in operating conditions can easily cause granular sludge disintegration. Adding natural materials such as sand and bentonite to the activated sludge system can promote the formation of granular sludge, but natural materials have shortcomings in terms of density, surface roughness, and hydrophilicity.

[0003] To address the existing problems, we propose a biomimetic water treatment material. Summary of the Invention

[0004] The purpose of this invention is to provide a biomimetic water treatment material to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A biomimetic water treatment material comprising magnetic sea urchin-type carbides.

[0007] Preferably, the raw materials for preparing the carbide include shrike, ferric chloride, ferrous chloride, alkaline solution, surfactant, and nitrogen.

[0008] Preferably, the preparation steps of the water treatment material include:

[0009] S1: Add an appropriate amount of grasshoppers to distilled water, add surfactant and stir, then add ferric chloride and stir, and finally add ferrous chloride and stir. During the stirring process, nitrogen gas is introduced into the solution. The pH of the solution is 10-11. After treatment under process conditions 1, the solution is dried to obtain product 1.

[0010] S2: Product 1 and the polyol aqueous solution are added to the reactor and processed under process conditions 2 to obtain modified grasshopper.

[0011] Preferably, the polyol is one or more of isopropanol, pentaerythritol, and sorbitol.

[0012] Preferably, the concentration of the polyol aqueous solution is 5-15%.

[0013] Preferably, after adding the surfactant to S1, the mixture is stirred for 10-20 minutes, after adding ferric chloride, the mixture is stirred for 5-15 minutes, and after adding ferrous chloride, the mixture is stirred for 5-20 minutes. The process condition 1 is to introduce nitrogen gas, raise the solution temperature to 70-75°C, then add an alkaline solution dropwise, react for 3-5 hours, and then raise the temperature to 150-200°C for 10-15 minutes.

[0014] Preferably, the process conditions 2 are: solution temperature between 120-150℃, gas pressure between 0.1-0.3MPa, and reaction time between 10-15min.

[0015] Preferably, the concentration of the ferric chloride solution is 50-70 g / L, the concentration of the ferrous chloride solution is 25-30 g / L, and the mass ratio of the ferric chloride, surfactant, ferric chloride and ferrous chloride is (1000-1200):(1-1.5):(20-30):(10-20).

[0016] Preferably, the surfactant is one or more of nonylphenol polyoxyethylene ether-10 and polyethylene glycol.

[0017] A method for preparing a biomimetic water treatment material includes:

[0018] T1: Add an appropriate amount of grasshoppers to distilled water, add surfactant and stir, then add ferric chloride and stir, and finally add ferrous chloride and stir. During the stirring process, nitrogen gas is introduced into the solution. The pH of the solution is 10-11. After treatment under process conditions A, the solution is dried to obtain product a.

[0019] T2: Product a and polyol aqueous solution are added to a reaction vessel and processed under process conditions B to obtain modified grasshopper.

[0020] Preferably, the concentration of the ferric chloride solution is 50-70 g / L, the concentration of the ferrous chloride solution is 25-30 g / L, and the mass ratio of the ferric chloride, surfactant, ferric chloride and ferrous chloride is (1000-1200):(1-1.5):(20-30):(10-20).

[0021] Preferably, process condition A involves introducing nitrogen gas, raising the solution temperature to 70-75°C, adding an alkaline solution dropwise, reacting for 3-5 hours, raising the temperature to 120-150°C, and holding for 10-15 minutes.

[0022] Preferably, the process conditions B are: solution temperature between 120-150℃, gas pressure between 0.1-0.3MPa, and reaction time between 10-15min.

[0023] Compared with the prior art, the beneficial effects of the present invention are: the artificial material prepared by the present invention has high surface roughness and good hydrophilicity, which can quickly combine with sludge, and the urchin-like structure on the surface can promote the formation of biofilm, the density of the material can be controlled and it is easy to settle, and the surface magnetic material can be recovered by magnets; the water treatment material prepared by the present invention enhances the coagulation effect of sludge and helps the rapid aggregation and sedimentation of suspended solids and pollutants. Attached Figure Description

[0024] Figure 1 These are microscope images of Embodiments 1-3 and Comparative Examples 1-3 of the present invention;

[0025] Figure 2 These are microscope images of Examples 1-3, Comparative Examples 1-3, and after 5 minutes of contact with microorganisms in this invention;

[0026] Figure 3 These are scanning electron microscope images of Examples 1-3, Comparative Examples 1-3, and after 25 minutes of contact with microorganisms in this invention;

[0027] Figure 4 These are the hysteresis curves of Embodiments 1-3 and Comparative Examples 1-3 of the present invention; Detailed Implementation

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1:

[0030] 1. Preparation method of modified Artemisia annua

[0031] S1: Add 1000 parts of grasshoppers to 5000 parts of distilled water, add 1 part of nonylphenol polyoxyethylene ether-10 and stir for 10 min, then add 20 parts of ferric chloride and stir for 5 min, and finally add 10 parts of ferrous chloride and stir for 5 min. During the stirring process, nitrogen gas is introduced into the solution. After the nitrogen gas is introduced, the solution temperature is raised to 70℃, and then an alkaline solution is added dropwise until the solution pH is 10. After reacting for 3 h, the temperature is raised to 120℃ and treated for 10 min. After the treatment is completed, the product 1 is obtained by drying.

[0032] S2: Add 10 parts of product 1 and 1 part of a 5% isopropanol aqueous solution to a reaction vessel. The temperature is between 120°C and the pressure is 0.1 MPa. After processing for 10 minutes, filter and dry to obtain modified grasshopper.

[0033] Example 2:

[0034] S1: 1200 parts of grasshoppers were added to 8000 parts of distilled water, 1.5 parts of polyethylene glycol were added and stirred for 20 min, then 30 parts of ferric chloride were added and stirred for 15 min, and finally 20 parts of ferrous chloride were added and stirred for 20 min. Nitrogen gas was introduced into the solution during stirring. After the nitrogen gas was introduced, the solution temperature was raised to 75℃, and then an alkaline solution was added dropwise until the solution pH was 11. After reacting for 5 h, the temperature was raised to 150℃ and treated for 15 min. After treatment, the product 1 was obtained by drying.

[0035] S2: Add 20 parts of product 1 and 2 parts of pentaerythritol with a concentration of 15% to the reactor. The temperature is between 150℃ and the pressure is 0.3MPa. After processing for 15 minutes, filter and dry to obtain modified grasshopper.

[0036] Example 3:

[0037] S1: 1050 parts of grasshopper were added to 6000 parts of distilled water, 0.3 parts of nonylphenol polyoxyethylene ether-10 and 0.9 parts of polyethylene glycol were added and stirred for 15 min, then 25 parts of ferric chloride were added and stirred for 10 min, and finally 15 parts of ferrous chloride were added and stirred for 10 min. During the stirring process, nitrogen gas was introduced into the solution. After the nitrogen gas was introduced, the solution temperature was raised to 72℃, and then an alkaline solution was added dropwise until the solution pH was 10.5. After reacting for 4 h, the temperature was raised to 130℃ and treated for 12 min. After the treatment was completed, the product 1 was obtained by drying.

[0038] S2: 15 parts of product 1, 1 part of 10% isopropanol aqueous solution, and 0.5 parts of 10% pentaerythritol aqueous solution were added to a reaction vessel. The temperature was between 130℃ and the pressure was 0.2MPa. After treatment for 12 minutes, the mixture was filtered and dried to obtain modified grasshopper.

[0039] Comparative Example 1:

[0040] S1: Add 1050 parts of grasshopper to 6000 parts of distilled water, add 0.3 parts of nonylphenol polyoxyethylene ether-10 and 0.9 parts of polyethylene glycol and stir for 10-20 min, then add 25 parts of ferric chloride and stir for 10 min, and finally add 15 parts of ferrous chloride and stir for 10 min. During the stirring process, nitrogen gas is introduced into the solution. After the nitrogen gas is introduced, the solution temperature is raised to 72℃, and then an alkaline solution is added dropwise until the solution pH is 10.5. After reacting for 4 h, the temperature is raised to 130℃ and treated for 12 min. After treatment, the product 1 is obtained by drying.

[0041] S2: Add 15 parts of product 1 and 1.5 parts of distilled water into a reaction vessel. The temperature is between 130℃ and the pressure is 0.2MPa. After processing for 12 minutes, filter and dry to obtain modified grasshopper.

[0042] Comparative Example 2:

[0043] S1: 1050 parts of grasshoppers were added to 6000 parts of distilled water, 0.3 parts of nonylphenol polyoxyethylene ether-10 and 0.9 parts of polyethylene glycol were added and stirred for 15 min. Nitrogen gas was introduced into the solution during stirring. After the nitrogen gas was introduced, the solution temperature was raised to 72℃, and then an alkaline solution was added dropwise until the solution pH was 10.5. After reacting for 4 h, the temperature was raised to 130℃ and treated for 12 min. After the reaction was completed, the product 1 was obtained by drying.

[0044] S2: Add 15 parts of product 1, 1 part of 10% isopropanol aqueous solution, and 0.5 parts of 10% pentaerythritol aqueous solution to a reaction vessel. The temperature is between 1300℃ and the pressure is 0.2MPa. After processing for 12 minutes, filter and dry to obtain modified grasshopper.

[0045] Comparative Example 3:

[0046] S1: Add 1050 parts of Xanthium sibiricum to 6000 parts of distilled water, add 0.3 parts of nonylphenol polyoxyethylene ether-10 and 0.9 parts of polyethylene glycol and stir for 15 min, then add 25 parts of ferric chloride and stir for 10 min, and finally add 15 parts of ferrous chloride and stir for 10 min. During the stirring process, nitrogen gas is introduced into the solution. After the nitrogen gas is introduced, the solution temperature is raised to 72℃, and then an alkaline solution is added dropwise until the solution pH is 10.5. After reacting for 4 h, the temperature is raised to 130℃ and treated for 12 min. After the treatment is completed, the product 1 is obtained by drying.

[0047] S2: Add 15 parts of product 1, 1 part of 10% isopropanol aqueous solution, and 0.5 parts of 10% pentaerythritol aqueous solution to a reaction vessel. The temperature is between 130℃ and the pressure is 0.2MPa. After processing for 12 minutes, filter and dry to obtain modified cocklebur.

[0048] Prepare activated sludge solution by taking 1L of activated sludge solution and adding 0.5g of modified Artemisia annua. Examples 1-3 and Comparative Examples 1-3 were added to the activated sludge solution for a period of time, and the surface morphology of each sample was observed using a microscope and a scanning electron microscope.

[0049] Activated sludge solution preparation method: Under room temperature conditions (25-27℃), activated sludge is cultivated using artificial wastewater with an activated sludge concentration of 2-3 g / L (dry weight). After cultivation for 2-3 days, activated sludge with stable function is formed.

[0050] The contact angles of Examples 1-3 and Comparative Examples 1-3 were measured, and hysteresis curves were generated.

[0051] Table 1 Test Results

[0052]

[0053] As can be seen from the test results in Table 1, the contact angles of Examples 1-3 and Comparative Example 2 are basically the same, while the contact angle of Comparative Example 1 is the largest, and the contact angle of Comparative Example 3 is also relatively large.

[0054] From the appendix Figure 1 It can be seen that the appearance of Examples 1-3 and Comparative Examples 1-2 is basically the same. Comparative Example 3 has fewer needle punctures, but overall, Comparative Example 3 is close to Examples 1-3 and Comparative Examples 1-2.

[0055] From the appendix Figure 2 It can be seen that after 5 minutes of contact with microorganisms, Examples 1-3 and Comparative Examples 1-3 showed a high degree of microbial adhesion, while Comparative Examples 1 and 3 showed a relatively low degree of microbial adhesion. Although the microorganisms in Comparative Example 2 were slightly worse than those in Examples 1-3, they were better than those in Comparative Examples 1 and 3.

[0056] From the appendix Figure 3 It can be seen that after 25 minutes of contact with microorganisms, Examples 1-3 and Comparative Examples 1-3 showed a very high adsorption capacity for microorganisms, which basically completely covered the substrate. However, Comparative Examples 1 and 3 showed very low adsorption capacity, with only a small amount of microorganisms adhering to the substrate. The adsorption capacity of Comparative Example 2 was worse than that of Examples 1-3, but better than that of Comparative Examples 1 and 3.

[0057] From the appendix Figure 4 It can be seen that the hysteresis lines in Examples 1-3 are relatively far from the center line, indicating strong magnetism. Comparative Examples 1 and 3 are slightly worse, while Comparative Example 2 is the worst.

[0058] Although embodiments of the invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A biomimetic water treatment material, characterized by: Including magnetic sea urchin-type carbides; The carbide is a modified sedge, and the raw materials for preparing the modified sedge include sedge, ferric chloride, ferrous chloride, alkaline solution, surfactant and nitrogen. The mass ratio of sedge, surfactant, ferric chloride and ferrous chloride is (1000-1200):(1-1.5):(20-30):(10-20). The preparation steps of the modified grasshopper include: S1: Add an appropriate amount of grasshoppers to distilled water, add a surfactant and stir, then add ferric chloride and stir, and finally add ferrous chloride and stir. During the stirring process, nitrogen gas is introduced into the solution. After the nitrogen gas is introduced, the solution temperature is raised to 70-75℃, and then an alkaline solution is added dropwise. The solution pH is 10-11. After reacting for 3-5 hours, the temperature is raised to 120-150℃ and treated for 10-15 minutes before drying to obtain product 1. S2: Add product 1 and the polyol aqueous solution into a reaction vessel, and treat for 10-15 minutes at a solution temperature of 120-150℃ and a gas pressure of 0.1-0.3MPa to obtain modified grasshopper.

2. The biomimetic water treatment material according to claim 1, wherein The polyol is one or more of isopropanol, pentaerythritol, and sorbitol.

3. The biomimetic water treatment material according to claim 1, wherein After adding the surfactant to S1, stir for 10-20 minutes; after adding ferric chloride, stir for 5-15 minutes; and after adding ferrous chloride, stir for 5-20 minutes.

4. The biomimetic water treatment material of claim 1, wherein, The concentration of the ferric chloride solution is 50-70 g / L, and the concentration of the ferrous chloride solution is 25-30 g / L.

5. The biomimetic water treatment material according to claim 1, wherein: The surfactant is one or more of nonylphenol polyoxyethylene ether-10 and polyethylene glycol.

6. A method for preparing a biomimetic water treatment material, characterized by, The preparation method includes: T1: Add an appropriate amount of *Gnaphalium affine* to distilled water, add a surfactant and stir, then add ferric chloride and stir, and finally add ferrous chloride and stir. During the stirring process, nitrogen gas is introduced into the solution. The pH of the solution is 10-11. After treatment under process condition A, the solution is dried to obtain product a. The process condition A is to introduce nitrogen gas, raise the solution temperature to 70-75℃, then add an alkaline solution dropwise, react for 3-5 hours, then raise the temperature to 120-150℃ and treat for 10-15 minutes. The mass ratio of *Gnaphalium affine*, surfactant, ferric chloride and ferrous chloride is (1000-1200):(1-1.5):(20-30):(10-20). T2: Product a and polyol aqueous solution are added to a reaction vessel and processed under process conditions B to obtain modified lice; the process conditions B are: solution temperature between 120-150℃, gas pressure between 0.1-0.3MPa, and reaction time between 10-15min.

7. The method of claim 6, wherein the water treatment material is prepared by a process comprising: The concentration of the ferric chloride solution is 50-70 g / L, and the concentration of the ferrous chloride solution is 25-30 g / L.

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