A formaldehyde degradation composite agent, a formaldehyde removal device, a preparation method and application

Abstract

The present application belongs to the technical field of environmental pollution microbial treatment, and discloses a formaldehyde degradation composite agent, a formaldehyde removal device, a preparation method and application. The preparation method of the formaldehyde degradation composite agent provided by the present application comprises: activating and culturing a formaldehyde degradation strain with an activation culture solution to obtain an activated strain; S2, mixing the activated strain with a treatment solution A to obtain a mixed solution; adding the mixed solution into a treatment solution B for forming treatment to obtain the formaldehyde degradation composite agent; wherein the activation culture solution comprises 0.1-5 mu g / L of potassium sulfite and 5-10 mg / L of carrageenan oligosaccharide, the treatment solution A comprises polyvinyl alcohol, sodium alginate and carrageenan, and the treatment solution B comprises 0.15-0.5% (w / v) of boric acid and 1-3% (w / v) of calcium chloride. The formaldehyde degradation composite agent prepared by the method provided by the present application has excellent degradation effect on formaldehyde pollution of different concentrations, and has wide application prospect.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental pollution microbial treatment, and in particular relates to a formaldehyde degradation compound, a formaldehyde removal device, a preparation method and applications. Background Art

[0002] Formaldehyde, a basic chemical raw material, is widely used in resins, leather, paints, coatings, and plastics. However, it has been clearly classified as a Class 1 carcinogen by authoritative organizations. This substance is highly hazardous and can bind tightly to proteins, causing a range of adverse symptoms such as allergic reactions. Furthermore, formaldehyde also has the potential to cause cancer, posing a serious threat to human health.

[0003] At present, formaldehyde pollution is mainly treated through physical, chemical and biological methods. Among them, the biological method is to transform and stabilize formaldehyde through the metabolism of microorganisms such as bacteria and fungi to achieve the treatment of formaldehyde in the environment. Compared with physical and biological methods, biological methods have the advantages of high formaldehyde degradation rate and no secondary pollution, and are a popular research direction in the field of formaldehyde treatment. However, formaldehyde is also toxic to microorganisms. Excessive formaldehyde can denature the proteins, DNA and RNA of microorganisms, thereby inhibiting the activity of microorganisms. Severe cases can lead to the inactivation of microorganisms, limiting their application in the treatment of high-concentration formaldehyde pollution and having significant limitations. Summary of the Invention

[0004] A first object of the present invention is to provide a method for preparing a formaldehyde-degrading composite agent. In the preparation method, a formaldehyde-degrading bacterial strain is first activated using an activation culture solution comprising 0.1 to 5 μg / L of potassium sulfite and 5 to 10 mg / L of carrageenan oligosaccharides, and then the activated bacterial strain is treated sequentially with treatment solutions A and B, so that the activated bacterial strain is loaded inside and / or on the surface of a carrier formed by polyvinyl alcohol, sodium alginate and carrageenan, thereby obtaining a formaldehyde-degrading composite agent. First, the formaldehyde-degrading composite agent has a well-developed and relatively compact pore structure, which has a certain cell retention effect, thereby achieving effective fixation of formaldehyde-degrading strains and effectively reducing microbial leakage. Second, the dense pore structure still has a good mass transfer effect for small molecules such as formaldehyde. Formaldehyde in the environment can smoothly pass through these pore structures into the interior of the material, and then be taken up and utilized by Pseudomonas IOFA1, thereby achieving excellent formaldehyde degradation. Furthermore, in environments with high formaldehyde concentrations, the well-developed and relatively compact pore structure can play a certain buffering role, effectively reducing the formaldehyde concentration directly exposed to the formaldehyde-degrading strain, and the formaldehyde tolerance of the activated formaldehyde-degrading strain is improved. Therefore, the formaldehyde-degrading composite agent has excellent degradation effects on various concentrations of formaldehyde pollution and has broad application prospects.

[0005] The second object of the present invention is to provide a formaldehyde degradation composite agent.

[0006] A third object of the present invention is to provide a formaldehyde removal device.

[0007] A fourth object of the present invention is to provide use of the above-mentioned formaldehyde degradation composite agent and / or formaldehyde removal device in formaldehyde pollution treatment.

[0008] Specifically, the preparation method of the formaldehyde-degrading composite agent provided by the present invention specifically includes: S1, taking an activated culture solution to activate and culture a formaldehyde-degrading strain to obtain an activated strain; S2, taking the activated strain and mixing it with a treatment solution A to obtain a mixed solution; S3, taking the mixed solution and adding it to a treatment solution B for molding treatment to obtain the formaldehyde-degrading composite agent; wherein the activated culture solution includes 0.1-5 μg / L potassium sulfite and 5-10 mg / L carrageenan oligosaccharides, the treatment solution A includes polyvinyl alcohol, sodium alginate and carrageenan in a mass ratio of 1:(0.01-0.5):(0.01-0.5), and the treatment solution B includes 0.15-0.5% (w / v) boric acid and 1-3% (w / v) calcium chloride.

[0009] Furthermore, in step S1, the weight average molecular weight of the carrageenan oligosaccharide is 1000 to 3000 Da.

[0010] Furthermore, in step S1, the activation culture medium includes one or more of MS culture medium, LB culture medium, YPD culture medium and MRS culture medium.

[0011] Furthermore, in step S1, the formaldehyde-degrading strain is Pseudomonas sp. IOFA1 and / or Pseudomonas putida xyz-zjut.

[0012] Furthermore, in step S1, based on the volume of the activated culture, the amount of the formaldehyde-degrading strain added is 10 5 ~10 7 Cell / mL.

[0013] Furthermore, in step S1, the activation culture temperature is 25-37° C., and the time is 0.5-3 h.

[0014] Furthermore, in step S2, based on the volume of the treatment solution A, the amount of the activated strain added is 10 7 ~10 8 Cell / mL.

[0015] Furthermore, in step S2, the activated strain is mixed with the treatment solution A at a temperature of 40 to 50°C for 1 to 3 minutes.

[0016] Furthermore, in step S3, the mixing volume ratio of the mixed solution and the treatment solution B is 1:(3-5).

[0017] Furthermore, in step S3, the molding process is performed at a temperature of 30 to 35° C. for 1 to 3 hours.

[0018] The formaldehyde degradation composite agent provided by the present invention is prepared by the above-mentioned preparation method of the formaldehyde degradation composite agent.

[0019] The formaldehyde removal device provided by the present invention comprises the formaldehyde degradation composite agent described above.

[0020] The present invention also provides the use of the formaldehyde degradation composite agent and / or formaldehyde removal device described above in formaldehyde pollution treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a photo of the formaldehyde degradation composite provided in Example 1 of the present invention;

[0022] Figure 2 This is a SEM image of the formaldehyde degradation composite provided in Example 1 of the present invention (scale is 3 μm);

[0023] Figure 3 This is a photo of the formaldehyde-degrading composite provided in Example 2 of the present invention;

[0024] Figure 4 This is a SEM image of the formaldehyde degradation composite provided in Example 2 of the present invention (scale is 3 μm);

[0025] Figure 5 A photo of the formaldehyde degradation composite provided in Comparative Example 1;

[0026] Figure 6 This is an SEM image of the formaldehyde degradation composite provided in Comparative Example 1 (scale is 3 μm);

[0027] Figure 7 This is a graph showing the experimental results of the formaldehyde degradation rate of the formaldehyde degradation compound provided in the test example of the present invention. DETAILED DESCRIPTION

[0028] The present invention provides a preparation method of a formaldehyde-degrading composite agent. The preparation method specifically comprises the following steps: S1, taking an activated culture solution to perform activation culture on a formaldehyde-degrading strain to obtain an activated strain; S2, mixing the activated strain with a treatment solution A to obtain a mixed solution; and S3, taking the mixed solution and adding it into a treatment solution B for molding treatment to obtain the formaldehyde-degrading composite agent.

[0029] In the present invention, the method for preparing the formaldehyde-degrading composite agent described above is applicable to most formaldehyde-degrading strains in the prior art, and therefore is not particularly limited to the formaldehyde-degrading strains. In some specific embodiments, specific examples of the formaldehyde-degrading strains include, but are not limited to, Pseudomonas sp. IOFA1 and / or Pseudomonas putida xyz-zjut.

[0030] In the present invention, in step S1, the activation culture medium includes potassium sulfite and carrageenan oligosaccharides, and the concentration of the potassium sulfite is specifically 0.1-5 μg / L, such as 0.1 μg / L, 0.18 μg / L, 0.2 μg / L, 0.23 μg / L, 0.5 μg / L, 1 μg / L, 1.5 μg / L, 2.5 μg / L, 3 μg / L, 5 μg / L, or any value therebetween; the concentration of the carrageenan oligosaccharides is specifically 5-10 mg / L, such as 5 mg / L, 5.1 mg / L, 5.3 mg / L, 5.5 mg / L, 6 mg / L, 7.8 mg / L, 8 mg / L, 9 mg / L, 10 mg / L, or any value therebetween. At this time, the activation culture medium is used to activate the formaldehyde-degrading strain, effectively improving the tolerance of the formaldehyde-degrading strain to formaldehyde and enhancing its ability to degrade formaldehyde.

[0031] In the present invention, in step S1, the activated culture solution is prepared by adding the above-mentioned sodium sulfite and carrageenan oligosaccharide to a bacterial culture medium conventionally used in the prior art as a base; specific examples of the bacterial culture medium include but are not limited to: one or more of MS medium, LB medium, YPD medium and MRS medium.

[0032] In some specific embodiments, in step S1, the weight average molecular weight of the carrageenan oligosaccharide is preferably 1000-3000 Da, such as 1000 Da, 1100 Da, 1500 Da, 1800 Da, 2000 Da, 2500 Da, 3000 Da or any value therebetween.

[0033] In some specific embodiments, in step S1, based on the volume of the activated culture, the amount of the formaldehyde-degrading strain added is preferably 10 5 ~10 7 Cell / mL, such as 10 5 Cell / mL, 1.3×10 5 Cell / mL, 7.5×10 5 Cell / mL, 10 6 Cell / mL, 7×10 6 Cell / mL, 10 7 Cell / mL or any value in between.

[0034] In some specific embodiments, in step S1, the activation culture conditions include a temperature preferably of 25 to 37°C, such as 25°C, 28°C, 30°C, 31.6°C, 35°C, 37°C or any value therebetween; and a time preferably of 0.5 to 3h, such as 0.5h, 0.8h, 1h, 1.3h, 1.8h, 2h, 2.5h, 3h or any value therebetween.

[0035] In the present invention, in step S2, the treatment liquid A includes polyvinyl alcohol, sodium alginate and carrageenan, and the mass ratio of the polyvinyl alcohol, sodium alginate and carrageenan is specifically 1: (0.01 ~ 0.5): (0.01 ~ 0.5), such as 1: 0.01: 0.01, 1: 0.01: 0.08, 1: 0.01: 0.1, 1: 0.15: 0.1, 1: 0.2: 0.25, 1: 0.25: 0.25, 1: 0.5: 0.5 or any value therebetween. At this time, the treatment liquid A contains polyvinyl alcohol, sodium alginate and carrageenan in a specific mass ratio, so that the prepared formaldehyde degradation composite has a developed and relatively dense pore structure. In some specific embodiments, in step S2, the mass ratio of polyvinyl alcohol, sodium alginate and carrageenan in the treatment liquid A is more preferably 1: (0.08 ~ 0.12): (0.03 ~ 0.07).

[0036] In some specific embodiments, in step S2, based on the volume of the treatment solution A, the amount of the activated strain added is preferably 10 7 ~10 8 Cell / mL, such as 10 7 Cell / mL, 1.5×10 7 Cell / mL, 2×10 7 Cell / mL, 3×10 7 Cell / mL, 9×10 7 Cell / mL, 10 8 Cell / mL or any value in between.

[0037] In some specific embodiments, in step S2, the temperature for mixing the activated strain and the treatment liquid A is preferably 40-50°C, such as 40°C, 40.3°C, 41°C, 42°C, 45°C, 47°C, 48°C, 49°C, 50°C or any value therebetween; the time is preferably 1-3 min, such as 1 min, 1.1 min, 1.3 min, 1.5 min, 2 min, 2.3 min, 2.8 min, 3 min or any value therebetween.

[0038] In the present invention, in step S3, the treatment solution B includes boric acid and calcium chloride, and the concentration of the boric acid is specifically 0.15-0.5% (w / v), such as 0.15% (w / v), 0.18% (w / v), 0.2% (w / v), 0.23% (w / v), 0.28% (w / v), 0.3% (w / v), 0.38% (w / v), 0.4% (w / v), 0.5% (w / v) or any value therebetween; the concentration of the calcium chloride is specifically 1-3% (w / v), such as 1% (w / v), 1.1% (w / v), 1.15% (w / v), 1.2% (w / v), 1.5% (w / v), 1.8% (w / v), 2% (w / v), 2.3% (w / v), 2.5% (w / v), 3% (w / v) or any value therebetween. At this time, the treatment liquid B causes polyvinyl alcohol, sodium alginate and carrageenan to polymerize to form microspheres, thereby preparing a spherical formaldehyde degradation composite agent.

[0039] In some specific embodiments, in step S3, the mixing volume ratio of the mixed solution and the treatment solution B is preferably 1:(3-5), such as 1:3, 1:3.1, 1:3.5, 1:4, 1:4.2, 1:4.5, 1:5 or any value therebetween.

[0040] In some specific embodiments, in step S3, the conditions of the molding treatment include a temperature preferably of 30 to 35°C, such as 30°C, 30.5°C, 31°C, 32°C, 33°C, 35°C or any value therebetween; and a time preferably of 1 to 3h, such as 1h, 1.1h, 1.5h, 1.8h, 2h, 2.5h, 2.8h, 3h or any value therebetween.

[0041] The present invention also provides a formaldehyde-degrading composite agent, prepared by the above-described method. The formaldehyde-degrading composite agent comprises a spherical carrier having a well-developed porous structure on its surface and an activated bacterial strain supported on the carrier. The composite agent exhibits excellent degradation effects on formaldehyde pollution at various concentrations.

[0042] The present invention also provides a formaldehyde removal device comprising the formaldehyde degradation composite described above. The formaldehyde removal device effectively treats formaldehyde through the special arrangement of the formaldehyde degradation composite. This device is a conventional device used in the prior art, and the present invention does not impose any particular limitation on its specific structure.

[0043] The present invention also provides the use of the formaldehyde degradation composite agent and / or formaldehyde removal device described above in formaldehyde pollution treatment.

[0044] The embodiments of the present invention are described in detail below. The examples of the embodiments are intended to explain the present invention and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in this area or according to the product specifications. Reagents or instruments used that do not specify the manufacturer are all conventional products that can be obtained commercially.

[0045] The reagents and their sources involved in the following examples include: carrageenan oligosaccharides (Qingdao Bozhi, product number MKC1-3K); MS culture medium (Merck, product number M7150); polyvinyl alcohol (Yingxin Laboratory, product number TX03455); sodium alginate (Aladdin, product number S100126); carrageenan (source leaf, product number S30559).

[0046] The formaldehyde-degrading strains involved in the following examples include: Pseudomonas sp. IOFA1 (deposit number: CCTCC NO: M2010280); Pseudomonas putida xyz-zjut (deposit number: CCTCC No: M 2010125).

[0047] Example 1

[0048] This example is used to illustrate the preparation of a formaldehyde degradation composite agent, which specifically includes:

[0049] S1, according to 10 7 Pseudomonas IOFA1 was added to the activated culture medium at an inoculum size of 1 cell / mL. The culture was incubated at 37°C and 200 rpm in a shaker for 1 hour. The culture was then centrifuged at 10,000 rpm for 5 minutes, and the supernatant was removed to obtain the activated strain.

[0050] S2, take 10g of polyvinyl alcohol, 1g of sodium alginate and 0.5g of carrageenan and mix them with deionized water, and dilute to 1000mL, stir at 90℃ for 2h until completely dissolved, to obtain treatment solution A, cool treatment solution A to 45℃, and 7 The activated strain was added to the treatment solution A at an inoculum volume of 1 cell / mL and stirred for 3 min to obtain a mixed solution;

[0051] S3. Take 25 mL of the mixed solution and slowly add it into 75 mL of treatment solution B, perform molding treatment at 35° C. for 2.5 hours, and filter to obtain the formaldehyde degradation composite agent.

[0052] The activation culture medium used in this example is an MS culture medium containing 0.5 μg / L potassium sulfite and 5 mg / L carrageenan oligosaccharide; and the treatment solution B is an aqueous solution containing 0.03% (w / v) boric acid and 3% (w / v) calcium chloride.

[0053] Figure 1This is a photo of the formaldehyde degradation composite prepared in this example. Figure 2 The SEM image of the formaldehyde degradation composite agent is shown in FIG. Figure 1 and 2 It can be seen that the formaldehyde-degrading composite agent is a regular spherical shape with a developed and compact pore structure on the surface, and almost no cells are visible on the surface, indicating that Pseudomonas IOFA1 is mainly concentrated in the interior.

[0054] Example 2

[0055] This example uses the method provided in Example 1 to prepare a formaldehyde-degrading composite agent, except that in step S2, the concentration of polyvinyl alcohol in the treatment solution A is 7 g / L, the concentration of sodium alginate is 2.5 g / L, and the concentration of carrageenan is 2.5 g / L. Other conditions are the same to obtain a formaldehyde-degrading composite agent.

[0056] Figure 3 This is a photo of the formaldehyde degradation composite prepared in this example. Figure 4 The SEM image of the formaldehyde degradation composite agent is shown in FIG. Figure 3 and 4 It can be seen that the formaldehyde-degrading composite agent has a low sphericity and a tailing phenomenon. The surface has a developed and relatively tight pore structure, and a certain number of cells are distributed on the surface, indicating that Pseudomonas IOFA1 is distributed not only inside but also on the surface.

[0057] Comparative Example 1

[0058] This comparative example adopts the method provided in Example 1 to prepare the formaldehyde degradation composite agent, except that, in step S2, polyvinyl alcohol is used instead of carrageenan, and polyvinyl alcohol is used instead of sodium alginate. Other conditions are the same to obtain the formaldehyde degradation composite agent.

[0059] Figure 5 This is a photo of the formaldehyde degradation composite prepared in this comparative example. Figure 6 The SEM image of the formaldehyde degradation composite agent is shown in FIG. Figure 5 and 6 It can be seen that the formaldehyde-degrading composite agent is in a regular spherical shape, with a dense surface and a certain number of cells distributed thereon, indicating that Pseudomonas IOFA1 is distributed not only inside but also on the surface.

[0060] Example 3

[0061] This example uses the method provided in Example 1 to prepare a formaldehyde degradation compound, except that in step S1, the concentration of potassium sulfite in the activation culture medium is 0.1 μg / L, and the concentration of carrageenan oligosaccharide is 10 mg / L. Other conditions are the same to obtain a formaldehyde degradation compound.

[0062] Comparative Example 2

[0063] This comparative example provides a method for preparing a formaldehyde degradation composite agent, which specifically comprises:

[0064] S1. Take 10g of polyvinyl alcohol, 1g of sodium alginate and 0.5g of carrageenan and mix them with deionized water, and dilute to 1000mL. Stir at 90℃ for 2h until completely dissolved to obtain treatment solution A. Cool treatment solution A to 45℃ and 7 Pseudomonas IOFA1 was added to the treatment solution A at an inoculum size of cell / mL and stirred for 3 min to obtain a mixed solution;

[0065] S2. Take 25 mL of the mixed solution and slowly add it into 75 mL of treatment solution B, perform molding treatment at 35° C. for 2.5 hours, and filter to obtain the formaldehyde degradation composite agent.

[0066] The treatment solution B used in this comparative example is an aqueous solution comprising 0.03% (w / v) boric acid and 3% (w / v) calcium chloride.

[0067] Example 4

[0068] This example uses the method provided in Example 1 to prepare a formaldehyde-degrading composite agent, except that in step S1, an equal inoculum amount of Pseudomonas putida xyz-zjut is used instead of Pseudomonas IOFA1. Other conditions are the same to obtain a formaldehyde-degrading composite agent.

[0069] Comparative Example 3

[0070] This comparative example prepared a formaldehyde-degrading composite agent according to the method provided in comparative example 2, except that in step S1, an equal inoculum amount of Pseudomonas putida xyz-zjut was used instead of Pseudomonas IOFA1, and other conditions were the same to obtain a formaldehyde-degrading composite agent.

[0071] Test Case

[0072] This test example is used to illustrate the degradation performance of the formaldehyde degradation composite provided in the above embodiments and comparative examples on formaldehyde in the environment, specifically including:

[0073] 50 g of the formaldehyde degradation composite agent was respectively filled in a 100 mL adsorption column, and a series of formaldehyde solutions with different concentrations (10 mg / L, 100 mg / L, 500 mg / L, 1 g / L, 2 g / L, 5 g / L and 10 g / L) were prepared. The formaldehyde solutions were treated with the above adsorbents for 5 h. The formaldehyde concentrations of the solutions before and after treatment were determined according to the test method of GB / T 13197-1991, and the formaldehyde degradation rate (unit: %) was calculated according to the following formula.

[0074] Formaldehyde degradation rate = (C-C0) / C0×100%

[0075] Where C0 is the formaldehyde concentration of the solution before treatment, in g / L; C is the formaldehyde concentration of the solution after treatment, in g / L. Figure 7 shown.

[0076] Depend on Figure 7 The test results shown show that, compared with comparative examples 1 to 3, the formaldehyde degradation composite agent provided in the present invention has a 5-hour degradation rate of not less than 50.17% for high-concentration and low-concentration formaldehyde solutions, and can reach a maximum of 99.95%. It has excellent formaldehyde degradation effect and can be well applied to the treatment of formaldehyde pollution at different concentrations, and has good application prospects.

[0077] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A method for preparing a formaldehyde degradation composite agent, characterized in that: The preparation method comprises: S1. Taking the activated culture solution to activate the formaldehyde-degrading strain to obtain an activated strain; S2. Mixing the activated strain with treatment solution A to obtain a mixed solution; S3, taking the mixed solution and adding it into the treatment solution B for forming treatment to obtain the formaldehyde degradation composite agent; The activated culture medium includes 0.1-5 μg / L potassium sulfite and 5-10 mg / L carrageenan oligosaccharides, the treatment solution A includes polyvinyl alcohol, sodium alginate and carrageenan in a mass ratio of 1:(0.01-0.5):(0.01-0.5), the treatment solution B includes 0.15-0.5% (w / v) boric acid and 1-3% (w / v) calcium chloride, and the formaldehyde-degrading strain is Pseudomonas IOFA1 and / or Pseudomonas putida xyz-zjut, the preservation number of Pseudomonas IOFA1 is CCTCC NO: M2010280, and the preservation number of Pseudomonas putida xyz-zjut is CCTCC No: M 2010125.

2. The preparation method of the formaldehyde degradation composite agent according to claim 1, characterized in that: In step S1, the weight average molecular weight of the carrageenan oligosaccharide is 1000-3000 Da.

3. The preparation method of the formaldehyde degradation composite agent according to claim 1, characterized in that: In step S1, the activation culture medium includes one or more of MS medium, LB medium, YPD medium and MRS medium.

4. The preparation method of the formaldehyde degradation composite agent according to claim 1, characterized in that: In step S1, based on the volume of the activated culture, the amount of the formaldehyde-degrading strain added is 10 5 ~10 7 Cell / mL.

5. The method for preparing the formaldehyde degradation composite agent according to claim 1, wherein In step S1, the activation culture temperature is 25-37° C., and the time is 0.5-3 h.

6. The method for preparing the formaldehyde degradation composite agent according to claim 1, wherein In step S2, based on the volume of the treatment solution A, the amount of the activated strain added is 10 7 ~10 8 Cell / mL.

7. The method for preparing the formaldehyde degradation composite agent according to claim 1, wherein In step S2, the activated strain is mixed with the treatment solution A at a temperature of 40-50° C. for 1-3 minutes.

8. The method for preparing the formaldehyde degradation composite agent according to claim 1, wherein In step S3, the volume ratio of the mixed solution to the treatment solution B is 1:(3-5).

9. The method for preparing the formaldehyde degradation composite agent according to claim 1, wherein In step S3, the molding process is performed at a temperature of 30-35° C. for 1-3 hours.

10. A formaldehyde degradation composite agent, characterized in that: The formaldehyde degradation composite agent is prepared by the preparation method of the formaldehyde degradation composite agent according to any one of claims 1 to 9.

11. A formaldehyde removal device, characterized in that: The formaldehyde removal device comprises the formaldehyde degradation composite agent according to claim 10.

12. Use of the formaldehyde degradation composite agent according to claim 10 and / or the formaldehyde removal device according to claim 11 in formaldehyde pollution treatment.

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