Biofouling-resistant catalytic photo-thermal film for organic industrial wastewater treatment and preparation method of biofouling-resistant catalytic photo-thermal film

Abstract

The invention discloses an anti-biofouling catalytic photo-thermal film for organic industrial wastewater treatment and a preparation method thereof. The problems that in the organic industrial wastewater treatment process, a photo-thermal film material is prone to biofouling, so that the performance is reduced, and organic pollutants further deteriorate, and the performance is reduced are solved. The preparation method comprises the following steps: preparing an electrospinning basement membrane by using an electrospinning technology; constructing an iron-based electrospinning base membrane loaded with an iron-based catalyst through a hydrothermal method; graphite phase carbon nitride and a silver nitrate solution are loaded on an iron-based electrospinning base membrane in a vacuum filtration mode to form a graphite phase carbon nitride-silver ion / iron-based electrospinning base membrane; and finally, irradiating with a xenon lamp light source to obtain the biofouling-resistant catalytic photo-thermal film. In the organic industrial wastewater treatment process, the purposes of synchronously removing organic pollutants and inhibiting microorganisms can be effectively achieved, and long-term efficient evaporation and degradation performance is kept. The method has expansibility, is suitable for batch production, is beneficial to industrialization, and has wide application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to an anti-biological fouling catalytic photothermal membrane for treating organic industrial wastewater and a preparation method thereof. Background Art

[0002] Solar interfacial evaporation technology is considered to be a pollution-free and convenient method for supplying clean water. Among them, the solar thermal film converts sunlight into thermal energy through the photothermal materials loaded on the surface, raising the surface temperature to evaporate the wastewater and condense it into fresh water. However, the surface temperature of the existing photothermal film is generally 35-40°C. In the process of treating industrial wastewater generated by the pharmaceutical industry, food industry, and medical industry, the suitable growth environment on the surface of the photothermal film may promote the attachment and accumulation of microorganisms. At the same time, a large amount of organic pollutants in industrial wastewater will continuously provide carbon source nutrition for these microorganisms, forming the accumulation and fouling of microorganisms on the photothermal membrane. These biological foulings will block the pore structure of the photothermal membrane, thereby affecting the evaporation performance and water purification performance of the photothermal membrane, and at the same time reduce the durability of the photothermal membrane. Therefore, it is necessary to develop anti-biofouling catalytic photothermal membranes that take into account both the removal of organic pollutants and the inhibition of microorganisms. Summary of the invention

[0003] The present invention aims to solve the problem that microorganisms block the photothermal interface during the treatment of organic industrial wastewater, resulting in reduced evaporation performance and water purification performance, and that organic pollutants in organic industrial wastewater will aggravate the fouling of the photothermal membrane. The present invention provides an anti-biofouling catalytic photothermal membrane for the treatment of organic industrial wastewater and a preparation method thereof. The present invention loads anti-biofouling materials and iron-based catalysts onto an electrospun base membrane to develop an anti-biofouling catalytic photothermal membrane that simultaneously removes organic pollutants and inhibits microorganisms, thereby achieving efficient treatment of organic industrial wastewater. The anti-biofouling catalytic photothermal membrane prepared by the present invention has excellent anti-biological properties for organic industrial wastewater, and at the same time has a good catalytic degradation effect on organic pollutants, which can effectively achieve the purpose of simultaneously removing organic pollutants and inhibiting microorganisms.

[0004] In order to achieve the above object, the present invention provides a method for preparing an anti-biofouling catalytic photothermal membrane for organic industrial wastewater treatment, and the specific preparation method comprises the following steps:

[0005] (1) dissolving polyacrylonitrile powder in N,N-dimethylformamide to obtain a spinning solution A; and preparing an electrospinning substrate membrane using the spinning solution A through an electrospinning technique;

[0006] (2) immersing the electrospun base membrane prepared in step (1) in a hydrochloric acid-water mixture containing ferric chloride hexahydrate, and subjecting the mixture to a hydrothermal process at 55-75° C. for 8.0-15.0 h to in-situ loading of the iron-based catalyst on the electrospun base membrane, thereby obtaining an iron-based electrospun base membrane; wherein the concentration of the ferric chloride hexahydrate is 0.04-0.10 M, and the pH of the hydrochloric acid-water mixture is 2-4;

[0007] (3) placing the melamine powder in a muffle furnace for calcining, wherein the calcination temperature is 500-600° C., the heating rate is 2-5° C. / min, the calcination time is 1.0-3.0 h, and the carbon nitride powder is obtained after cooling; the obtained carbon nitride powder is ground for 0.5-1.0 h and then placed in a muffle furnace for secondary calcination, wherein the calcination temperature is 450-550° C., the heating rate is 2-10° C. / min, the calcination time is 1.0-3.0 h, and the graphite phase carbon nitride powder is obtained after cooling;

[0008] (4) uniformly dispersing the graphite phase carbon nitride powder prepared in step (3) into a silver nitrate solution to obtain a mixed solution B; loading the mixed solution B onto an iron-based electrospun membrane by vacuum filtration to obtain a graphite phase carbon nitride-silver ion / iron-based electrospun membrane; wherein the ratio of the graphite phase carbon nitride powder to the silver nitrate solution is 0.2-2 g:1 L, preferably 1.2 g:1 L; and the concentration of the silver nitrate solution is 0.1-0.3 M;

[0009] (5) The graphite phase carbon nitride-silver ion / iron-based electrospun membrane prepared in step (4) is irradiated with a xenon lamp light source to obtain an anti-biofouling catalytic photothermal membrane.

[0010] In the step (1), the mass fraction of polyacrylonitrile powder in the spinning solution A is 8.0wt%-15.0wt%; the molecular weight of the polyacrylonitrile powder is 80000-200000; and the electrospinning conditions are: voltage 12.0-18.0kV, spinning speed 0.8-1.5mL / h, and time 10.0-20.0h.

[0011] In the step (3), the grinding time of the carbon nitride powder is 0.5-1.0h.

[0012] In the step (4), the vacuum filtration time is 1.0-3.0 h, and the operating pressure is 0.02-0.1 MPa.

[0013] In the step (5), the power of the xenon lamp light source bulb is 300W, and the irradiation time is 1.0-3.0h.

[0014] The second aspect of the present invention provides an anti-biofouling catalytic photothermal membrane for organic industrial wastewater treatment obtained by the above-mentioned preparation method.

[0015] The third aspect of the present invention provides the application of the above-mentioned anti-biofouling catalytic photothermal membrane in the treatment of organic industrial wastewater. The application method comprises the following steps:

[0016] The anti-biofouling catalytic photothermal membrane prepared by the preparation method of the present invention is placed on the surface of organic industrial wastewater, and the organic industrial wastewater is treated by solar irradiation for 6.0-15.0 hours to achieve the purpose of simultaneous removal of organic pollutants and inhibition of microorganisms.

[0017] The anti-biofouling catalytic photothermal membrane prepared by the present invention has an excellent pore structure and a large number of anti-biofouling material attachment sites based on the electrospun membrane, which is beneficial to improving the evaporation performance and anti-fouling performance. At the same time, the advanced oxidation technology based on the in-situ generation of hydrogen peroxide by photocatalysis and induction can continuously generate free radicals with strong oxidizing properties, realizing the synchronous degradation of organic pollutants.

[0018] The pH of the organic industrial wastewater is 2.0-10.0, preferably 5.0-7.2, more preferably 6.0;

[0019] The sunlight intensity is 100-1000kW / m 2 , preferably 1000kW / m 2 ;

[0020] The organic pollutants are one or more of phenol, aniline, dyes, and antibiotics;

[0021] The microorganism is one or more of Escherichia coli and Staphylococcus aureus.

[0022] The present invention solves the problem that the photothermal membrane material is susceptible to biofouling during the treatment of organic industrial wastewater, resulting in performance degradation, and the presence of organic pollutants will further aggravate the performance degradation. The present invention first prepares a base membrane by electrospinning technology; then, an iron-based catalyst is loaded onto the electrospun base membrane by hydrothermal reaction to obtain an iron-based electrospun base membrane with the ability to catalyze hydrogen peroxide; then, graphite phase carbon nitride and silver nanoparticles with the ability to generate hydrogen peroxide in situ are loaded on the iron-based electrospun base membrane by vacuum filtration and light irradiation to form an anti-biofouling catalytic photothermal membrane. Based on the electrospun membrane with excellent pore structure and a large number of attachment sites of anti-biofouling material silver nanoparticles as the substrate, the present invention has good inhibitory ability against microorganisms in organic industrial wastewater. At the same time, based on the photocatalytic graphite phase carbon nitride that can self-generate hydrogen peroxide and induce advanced oxidation technology that occurs in situ with the iron-based catalyst, free radicals with strong oxidizing properties can be continuously generated, thereby achieving the synchronous degradation of organic pollutants in organic industrial wastewater. The present invention endows the solar interface photothermal film with new functions, and can achieve the purpose of synchronously removing organic pollutants and inhibiting microorganisms in the process of treating organic industrial wastewater, maintain long-term efficient evaporation and degradation performance, and thus maintain the long-term efficient application of the photothermal film. The present invention is scalable, suitable for mass production, conducive to industrialization, and has broad application prospects.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The anti-biofouling catalytic photothermal membrane prepared in the present invention can be used in the process of treating organic industrial wastewater to simultaneously achieve efficient in-situ catalytic degradation of organic pollutants in the wastewater by self-generated hydrogen peroxide, and inhibit the growth and enrichment of wastewater microorganisms on the surface, ultimately obtaining high-quality pure water.

[0025] (2) The anti-biofouling catalytic photothermal film prepared in the present invention has excellent catalytic effect and anti-biofouling effect. Compared with other structural photothermal films, it has excellent evaporation performance, more internal attachment sites, better degradation effect on organic pollutants, and better inhibition of microorganisms.

[0026] (3) The graphite-phase carbon nitride loaded in the anti-biofouling catalytic photothermal membrane prepared in the present invention can self-generate hydrogen peroxide and induce in-situ advanced oxidation technology with iron-based catalysts, which makes up for the defect that the advanced oxidation technology based on catalytic hydrogen peroxide always needs to add exogenous hydrogen peroxide.

[0027] (4) The iron-based catalyst loaded in the anti-biofouling catalytic photothermal membrane prepared in the present invention is safer, more stable, more renewable and does not produce additional pollution compared to other metal catalysts in the process of catalyzing hydrogen peroxide.

[0028] (5) The catalytic photothermal film prepared in the present invention has excellent anti-biological fouling performance, effectively prevents microorganisms from clogging the pores, can be recycled multiple times and maintain high-efficiency evaporation performance. It is also scalable, suitable for mass production, conducive to industrialization, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described in conjunction with the accompanying drawings and embodiments.

[0030] Figure 1 This is a physical picture of the prepared anti-biofouling catalytic photothermal membrane.

[0031] Figure 2 This is a scanning electron microscope image of the prepared anti-biofouling catalytic photothermal film.

[0032] Figure 3 The pictures are of the inhibition zones of Escherichia coli in organic industrial wastewater of Example 1 and Example 6 without adding anti-biofouling material.

[0033] Figure 4 It is the effect diagram of the long-term evaporation rate performance of Examples 1, 3, 4, 5, 6 and 7 in organic industrial wastewater.

[0034] Figure 5 The degradation effect diagram of phenol, an organic pollutant in organic industrial wastewater, is shown in Examples 1, 3, 4, 5, 6 and 7.

[0035] Figure 6 This is a rendering of the long-term evaporation rate performance of Examples 1 and 2 in organic industrial wastewater.

[0036] Figure 7 The degradation effect diagram of the organic pollutant aniline in organic industrial wastewater is shown in Examples 1 and 2. DETAILED DESCRIPTION

[0037] The embodiments described below are only typical embodiments of the present invention and do not constitute improper limitations on the present invention. Therefore, all obvious modifications described in the scope of the patent application of the present invention and other modifications that do not deviate from the essence of the present invention should be included in the scope of protection of the present invention.

[0038] The specific implementation modes of the present invention are further described below in combination with the technical solutions, but the present invention is not limited to the following embodiments.

[0039] Embodiment 1

[0040] A method for preparing an anti-biofouling catalytic photothermal membrane for treating organic industrial wastewater, the specific preparation method comprising the following steps:

[0041] (1) 1.35 g of polyacrylonitrile powder with a molecular weight of 100,000 was dissolved in 13.65 g of N,N-dimethylformamide to obtain a spinning solution A; the spinning solution A was used to prepare an electrospun substrate membrane under electrospinning conditions of a voltage of 14.5 kV, a spinning speed of 0.9 mL / h, and a spinning time of 12 h;

[0042] (2) immersing the electrospun base membrane prepared in step (1) in a hydrochloric acid-water mixture with a pH of 3 and containing 0.08 M ferric chloride hexahydrate, and subjecting the mixture to a hydrothermal process at 65° C. for 12.0 h to load the iron-based catalyst in situ on the electrospun base membrane, thereby obtaining an iron-based electrospun base membrane;

[0043] (3) calcining the melamine powder in a muffle furnace at a calcination temperature of 560° C., a heating rate of 4° C. / min, and a calcination time of 1.5 h, and obtaining carbon nitride powder after cooling; grinding the obtained carbon nitride powder in an agate mortar for 0.5 h and then calcining it in a muffle furnace for secondary calcination at a calcination temperature of 500° C., a heating rate of 5° C. / min, and a calcination time of 2.0 h, and obtaining graphite phase carbon nitride powder after cooling;

[0044] (4) Weighing 0.06 g of the graphite phase carbon nitride powder prepared in step (3) and evenly dispersing it in 50 mL of 0.2 M silver nitrate solution to obtain a mixed solution B; loading the mixed solution B on an iron-based electrospun membrane by vacuum filtration at an operating pressure of 0.1 MPa for 1.0 h to obtain a graphite phase carbon nitride-silver ion / iron-based electrospun membrane;

[0045] (5) The graphite phase carbon nitride-silver ion / iron-based electrospun membrane prepared in step (4) was irradiated with a xenon lamp light source with a bulb power of 300 W for 1.5 hours to obtain an anti-biofouling catalytic photothermal membrane.

[0046] Figure 1 This is a physical picture of the prepared anti-biofouling catalytic photothermal membrane.

[0047] Figure 2 This is a scanning electron microscope image of the prepared anti-biofouling catalytic photothermal film. Figure 2 It can be seen that Example 1 is in the form of nanofibers and has abundant pores, which helps the iron-based catalyst and the anti-biofouling material to be uniformly loaded on the base membrane.

[0048] Embodiment 2

[0049] The difference between this embodiment and Example 1 in the preparation process is that the base membrane in step (1) is replaced with a commercial polyacrylonitrile membrane with a pore size of 0.2 μm purchased from Beijing SafeLab Co., Ltd., and no electrospinning technology is required. The rest is the same as Example 1.

[0050] Embodiment 3

[0051] The difference between this embodiment and Example 1 in the preparation process is that there is no need to add ferric chloride hexahydrate in step (2), and the rest is the same as Example 1.

[0052] Embodiment 4

[0053] The difference between this embodiment and Example 1 in the preparation process is that the melamine powder in step (3) does not need to be subjected to secondary calcination, and the rest is the same as Example 1.

[0054] Embodiment 5

[0055] The difference between this embodiment and Example 1 in the preparation process is that there is no need to add graphite phase carbon nitride powder in step (4), and the rest is the same as Example 1.

[0056] Embodiment 6

[0057] The difference between this embodiment and Example 1 in the preparation process is that the silver nitrate solution in step (4) is replaced by water, and the rest is the same as Example 1.

[0058] Embodiment 7

[0059] The difference between this embodiment and Example 1 in the preparation process is that the concentration of the silver nitrate solution in step (4) is 0.1 M, and the rest is the same as Example 1.

[0060] Embodiment 8

[0061] Application of different anti-biofouling catalytic photothermal membranes to organic industrial wastewater. The photothermal membranes obtained in Examples 1, 3, 4, 5, 6, and 7 were placed on the surface of 100 mL of organic industrial wastewater (pH not adjusted, solution pH was 5.0), and the organic industrial wastewater was treated by irradiating it with sunlight for 8.0 hours. The sunlight intensity was 1000 kW / m 2 The main organic pollutant in organic industrial wastewater is phenol, and the main microorganism is Escherichia coli. The phenol concentration is about 25 mg / L, and the number of Escherichia coli is about 10,000 / L. The antimicrobial inhibition and anti-biological fouling capabilities of the photothermal membrane were tested using the antibacterial ring and long-term evaporation rate performance. The results are as follows: Figure 3 and Figure 4 As shown; at the same time, the concentration of organic pollutant phenol in the original industrial wastewater and condensate was determined by liquid chromatography, and the degradation efficiency of the photothermal film on the organic pollutant phenol was calculated. The results are shown in Figure 5 shown.

[0062] Figure 3 The pictures are of the inhibition zones of Escherichia coli in organic industrial wastewater of Example 1 and Example 6 without adding anti-biofouling material.

[0063] Figure 4 It is the effect diagram of the long-term evaporation rate performance of Examples 1, 3, 4, 5, 6 and 7 in organic industrial wastewater.

[0064] Figure 5 The degradation effect diagram of phenol, an organic pollutant in organic industrial wastewater, is shown in Examples 1, 3, 4, 5, 6 and 7.

[0065] Depend on Figure 3 It can be seen that on the culture medium coated with organic industrial wastewater, after culturing at 37°C for 48 hours, Example 1 of the present invention showed obvious inhibition zone in the Escherichia coli in the organic industrial wastewater, while Example 6 without adding anti-biofouling material did not show inhibition zone under the same conditions, indicating that the present invention has excellent effect of inhibiting microorganisms. Figure 4 It can be seen that the anti-biofouling catalytic photothermal membrane of the present invention can maintain an evaporation performance of 1.60-1.65 kg m in organic industrial wastewater within five days. -2 h -1 There will be no phenomenon of microorganisms blocking the pores and reducing the evaporation rate, and it has good anti-biological fouling ability.

[0066] Depend on Figure 5 It can be seen that the degradation effect of the organic pollutant phenol in the organic industrial wastewater of Example 1 can reach 98.9% on the first day, while the degradation efficiency of Example 3 on the first day is only 57.2%. The concentration of hydrogen peroxide was determined by potassium titanium oxalate spectrophotometry. No hydrogen peroxide was detected in the organic industrial wastewater after the first day of treatment in Example 1, while the presence of hydrogen peroxide was detected in the organic industrial wastewater after the first day of treatment in Example 3. This shows that the iron-based catalyst is effectively and efficiently catalyzed by hydrogen peroxide to degrade the organic pollutant phenol in the organic industrial wastewater. At the same time, no hydrogen peroxide was detected in the organic industrial wastewater after the first day of treatment in Example 4. However, the first-day degradation efficiency of the organic pollutant phenol in Example 4 is only 53.4%, indicating that Example 1 in the present invention achieves the degradation of organic pollutants in organic industrial wastewater by self-generating hydrogen peroxide and inducing in-situ advanced oxidation technology with iron-based catalysts. The degradation effect of the anti-biofouling catalytic photothermal film in the present invention is maintained at 98.2-98.9% within five days, and there is no phenomenon that the degradation effect of the photothermal film decreases due to microbial enrichment and covering the catalytic sites, further illustrating that it has good anti-biofouling ability.

[0067] Embodiment 9

[0068] The photothermal film obtained in Examples 1 and 2 was placed on the surface of 100 mL of organic industrial wastewater (pH not adjusted, solution pH was 7.2), and was irradiated with sunlight for 8.0 h to treat the organic industrial wastewater. The sunlight intensity was 1000 kW / m 2The main organic pollutant in organic industrial wastewater is aniline, and the main microorganism is Staphylococcus aureus. The aniline concentration is about 30 mg / L, and the number of Staphylococcus aureus is about 5000 / L. The long-term evaporation rate performance is used to test the anti-biological fouling ability of the photothermal membrane. The results are as follows Figure 6 As shown; at the same time, the concentration of organic pollutant aniline in the original industrial wastewater and condensate was determined by liquid chromatography, and the degradation efficiency of the photothermal film on the organic pollutant aniline was calculated. The results are shown in Figure 7 shown.

[0069] Figure 6 This is a rendering of the long-term evaporation rate performance of Examples 1 and 2 in organic industrial wastewater.

[0070] Figure 7 The degradation effect diagram of the organic pollutant aniline in organic industrial wastewater is shown in Examples 1 and 2.

[0071] Depend on Figure 6 It can be seen that the evaporation rate of the anti-biofouling catalytic photothermal membrane in Example 1 of the present invention in organic industrial wastewater on the first day is 1.61 kg m -2 h -1 And the evaporation performance can be maintained at 1.57-1.61kg m within five days. -2 h -1 The evaporation rate of the first day in Example 2 is 1.42 kg m -2 h -1 The evaporation performance showed a downward trend within five days, indicating that compared with other structured photothermal films, the present invention has excellent evaporation performance and good anti-biological fouling ability. Figure 7 It can be seen that the present invention has a good degradation rate for aniline, an organic pollutant in organic industrial wastewater, which can reach 91.2% on the first day and can maintain a degradation rate of more than 89.3% within five days. This shows that compared with other structured photothermal films, the present invention has more internal attachment sites, better degradation effect on organic pollutants and wider applicability.

Claims

1. A method for preparing an anti-biofouling catalytic photothermal membrane for treating organic industrial wastewater, characterized in that: The preparation method comprises the following steps: (1) dissolving polyacrylonitrile powder in N,N-dimethylformamide to obtain a spinning solution A; and preparing an electrospinning substrate membrane using the spinning solution A through an electrospinning technique; (2) immersing the electrospun base membrane prepared in step (1) in a hydrochloric acid-water mixture containing ferric chloride hexahydrate, and subjecting the mixture to a hydrothermal process at 55-75° C. for 8.0-15.0 h to in-situ loading of the iron-based catalyst on the electrospun base membrane, thereby obtaining an iron-based electrospun base membrane; wherein the concentration of the ferric chloride hexahydrate is 0.04-0.10 M, and the pH of the hydrochloric acid-water mixture is 2-4; (3) placing the melamine powder in a muffle furnace for calcining, wherein the calcination temperature is 500-600° C., the heating rate is 2-5° C. / min, the calcination time is 1.0-3.0 h, and the carbon nitride powder is obtained after cooling; the obtained carbon nitride powder is ground and placed in a muffle furnace for secondary calcination, wherein the calcination temperature is 450-550° C., the heating rate is 2-10° C. / min, the calcination time is 1.0-3.0 h, and the graphite phase carbon nitride powder is obtained after cooling; (4) dispersing the graphite phase carbon nitride powder prepared in step (3) into a silver nitrate solution to obtain a mixed solution B; loading the mixed solution B onto an iron-based electrospun membrane by vacuum filtration to obtain a graphite phase carbon nitride-silver ion / iron-based electrospun membrane; wherein the ratio of the graphite phase carbon nitride powder to the silver nitrate solution is 0.2-2 g:1 L, and the concentration of the silver nitrate solution is 0.1-0.3 M; (5) The graphite phase carbon nitride-silver ion / iron-based electrospun membrane prepared in step (4) is irradiated with a xenon lamp light source to obtain an anti-biofouling catalytic photothermal membrane.

2. The preparation method according to claim 1, characterized in that: In step (1), the mass fraction of polyacrylonitrile powder in the spinning solution A is 8.0wt%-15.0wt%.

3. The preparation method according to claim 1, characterized in that: In step (1), the molecular weight of the polyacrylonitrile powder is 80,000-200,000.

4. The preparation method according to claim 1, characterized in that: In step (1), the electrospinning conditions are: voltage 12.0-18.0 kV, spinning speed 0.8-1.5 mL / h, time 10.0-20.0 h.

5. The preparation method according to claim 1, characterized in that: In step (3), the grinding time of the carbon nitride powder is 0.5-1.0h; In step (4), the vacuum filtration time is 1.0-3.0 h, and the operating pressure is 0.02-0.1 MPa.

6. The preparation method according to claim 1, characterized in that: In step (5), the xenon lamp light source has a bulb power of 300W and an irradiation time of 1.0-3.0h.

7. An anti-biofouling catalytic photothermal membrane for organic industrial wastewater treatment obtained by the preparation method according to any one of claims 1 to 6.

8. Application of the anti-biofouling catalytic photothermal membrane described in claim 7 in organic industrial wastewater.

9. The use according to claim 8, characterized in that: The application method comprises the following steps: The anti-biofouling catalytic photothermal membrane is placed on the surface of organic industrial wastewater, and the organic industrial wastewater is treated by irradiating with sunlight for 6.0-15.0 hours.

10. The use according to claim 9, characterized in that: The pH of the organic industrial wastewater is 2.0-10.0; The sunlight intensity is 100-1000kW / m 2 ; The organic pollutants are one or more of phenol, aniline, dyes, and antibiotics; The microorganism is one or more of Escherichia coli and Staphylococcus aureus.

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