Method for removing organic micropollutants in water and application thereof

Abstract

The invention relates to a method for removing organic micropollutants in water and application of the method, and belongs to the technical field of water treatment. The method for removing the organic micropollutants in the water comprises the following steps: (1) adjusting the pH value of an aqueous solution containing the organic micropollutants to be acidic to obtain a mixed solution; (2) adding an oxidizing agent into the mixed solution obtained in the step (1), and reacting at-20 DEG C to-40 DEG C; the method disclosed by the invention has the advantages of high organic micropollutant removal rate, high removal efficiency, low energy consumption, low operation cost and small interference of water quality background substances, and the pollutants can be degraded by utilizing freeze-thaw cycle in a natural environment. If being applied to a cold chain disinfection process, the compound has important significance on degradation of organic pollutants and disinfection of microorganisms. Meanwhile, the method disclosed by the invention is simple and convenient to operate, does not need to add excessive chemical reagents, is slightly interfered by background ions, has a natural application scene, and is an economical, efficient and green enhanced oxidation method.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for removing organic micropollutants in water and an application thereof. Background Art

[0002] In the process of industrial water treatment, efficient oxidants are often used to oxidize sewage, among which hypochlorous acid (HOCl), sodium hypochlorite (NaClO), potassium permanganate (KMnO4), etc. are all commonly used oxidants in water treatment. HOCl / NaClO can kill microorganisms such as bacteria, viruses and parasites in water. Its disinfection mechanism is similar to that of chlorine (Cl2). It destroys the protein structure of microorganisms through oxidation, thereby achieving the purpose of disinfection. HOCl / NaClO also has a coagulant effect, which can assist in coagulation and precipitation to remove colored substances and algae in water. In addition, they can also oxidize harmful substances such as organic matter and chromaticity, thereby improving the color of water. KMnO4 can remove trace organic pollutants in water, reduce color / odor and inhibit algae reproduction, etc., and the technology has good selectivity, and the oxidation process does not produce halogenated byproducts. In short, efficient oxidants have multiple functions in the water treatment process, such as disinfection, oxidation, precipitation, deodorization, and inhibition of biological fouling, and play an important role in improving water quality, protecting equipment and maintaining the environment.

[0003] However, both HOCl / NaClO and KMnO4 are selective oxidants that can effectively remove organic matter containing electron-rich groups in water (such as phenolic substances), but the removal of some common organic micropollutants (such as carbamazepine, ibuprofen, etc.) is extremely limited. In order to improve the oxidizing ability of oxidants, a series of processes for strengthening oxidant oxidation have been studied and developed. For example, by introducing activated carbon, heavy metals and other substances for catalytic oxidation, but these operations will complicate the steps of the water treatment process; in addition, the additional introduction of chemical substances poses a risk of secondary pollution and will also increase the cost of the water treatment process. The process of strengthening oxidants based on light (ultraviolet light, visible light) can significantly improve the oxidizing ability, but UV radiation can have adverse effects on the human body and cause health problems; at the same time, the illumination process is greatly interfered by background substances in the water.

[0004] Therefore, it is necessary to find a green, healthy and efficient water pollution treatment method that does not require the introduction of other substances, effectively reduces treatment costs, has little interference from background substances in water quality, and does not cause harm to the human body. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems existing in the above-mentioned prior art and provide a method for removing organic micropollutants in water and its application.

[0006] The present invention is achieved through the following technical solutions:

[0007] In a first aspect, the present invention provides a method for removing organic micropollutants from water, comprising the following steps:

[0008] (1) adjusting the pH of an aqueous solution containing organic micropollutants to be acidic to obtain a mixed solution;

[0009] (2) Add an oxidant to the mixed solution obtained in step (1) and react at -20°C to -40°C.

[0010] The present invention provides a new method for removing organic micropollutants based on freezing treatment at -20°C to -40°C. Compared with conventional oxidants for treating organic micropollutants, the present invention is based on the freeze concentration effect. By freezing the reaction solution to be tested containing the oxidant, a highly concentrated salt solution is obtained in the frozen liquid lattice, thereby enhancing the efficiency of the oxidant in degrading organic micropollutants. The method of the present invention has a fast rate of removing organic micropollutants and a high removal efficiency. It can also utilize the freeze-thaw cycle in the natural environment to degrade pollutants, with low energy consumption, low operating costs, and little interference from water quality background substances. If applied to the cold chain disinfection process, it is of great significance to the degradation of organic pollutants and the disinfection of microorganisms. At the same time, the method of the present invention is easy to operate, does not require excessive addition of chemical reagents, is less interfered by background ions, and has natural application scenarios. It is an economical, efficient, and green method of enhanced oxidation.

[0011] Preferably, in step (1), the organic micropollutants include at least one of carbamazepine (CBZ), ibuprofen (IBP), cinnamic acid (CA), and sorbic acid (SA).

[0012] More preferably, in step (1), the organic micropollutant is at least one of carbamazepine, cinnamic acid and sorbic acid.

[0013] The method of the present invention has a rapid and efficient removal effect on organic micropollutants such as carbamazepine, ibuprofen, cinnamic acid, sorbic acid and the like, and has a more excellent removal effect on carbamazepine, cinnamic acid and sorbic acid in particular.

[0014] Preferably, in step (1), the pH of the mixed solution does not exceed 6.5; further, the pH of the mixed solution does not exceed 5, and further, the pH of the mixed solution is 4-5.

[0015] The method of the invention has excellent removal effect under acidic conditions.

[0016] Preferably, in step (1), the pH is adjusted by adding a buffer solution to the aqueous solution containing organic micropollutants.

[0017] Preferably, in step (1), the concentration of the organic micropollutants in the mixed solution is 1 μmol / L-3 μmol / L.

[0018] Preferably, in step (2), the oxidant includes at least one of hypochlorous acid (HOCl), sodium hypochlorite (NaClO), and potassium permanganate (KMnO4).

[0019] Preferably, in step (2), the concentration of the oxidant in the solution system is 30 μmol / L-50 μmol / L.

[0020] Preferably, in step (2), the reaction temperature is -20°C to -25°C.

[0021] Preferably, in step (2), a soluble salt is further added to the mixed solution obtained in step (1), and the soluble salt includes at least one of chloride, sulfate and nitrate.

[0022] The present invention has found through research that, in the process of freezing the reaction solution containing the oxidant, the common inorganic anions chloride ions, sulfate ions, and nitrate ions in water can further enhance the removal of organic micropollutants by the oxidant, and have a further promoting effect on the removal of organic micropollutants. That is, the step (2) is: adding the oxidant and the soluble salt to the mixed solution obtained in the step (1), and reacting at -20°C to -40°C.

[0023] Optionally, the soluble salt includes at least one of sodium chloride, sodium sulfate, and sodium nitrate.

[0024] More preferably, the soluble salt includes at least one of chloride and nitrate.

[0025] The present invention has been found through research that Cl - and NO3 - It has a better promoting effect on the removal of organic micropollutants.

[0026] Preferably, in step (2), the concentration of anions in the soluble salt in the solution system is not less than 0.05 mmol / L; further, the concentration of anions in the soluble salt in the solution system is not less than 1 mmol / L; optionally, the concentration of anions in the soluble salt in the solution system is 1 mmol / L-5 mmol / L.

[0027] The increase in the concentration of inorganic anions has a further positive promoting effect on the removal of organic micropollutants. The concentration of anions is preferably not less than 0.05 mM, more preferably not less than 1 mM.

[0028] In a second aspect, the present invention provides application of the method for removing organic micropollutants in water in water treatment.

[0029] The present invention has the following beneficial effects:

[0030] The present invention enhances the ability of oxidants such as HOCl / NaClO / KMnO4 to degrade typical pharmaceutical organic micropollutants CBZ, IBP, CA, and SA by freezing at -20°C to -40°C. In addition, the present invention also finds that common inorganic anions in water, such as Cl - 、NO3 - It has a significant promoting effect on the reaction. It is found that the increase in the concentration of inorganic anions and the decrease in the freezing temperature will promote the reaction. The method of the present invention is simple, easy to operate, does not require excessive addition of chemical reagents such as carbon and heavy metals, and has no health hazards to users. It is an economical, efficient, and green technology for enhancing the oxidation and hydrolysis ability of oxidants, and has an excellent effect of removing organic micropollutants in water. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the principle of the method for removing organic micropollutants in water according to the present invention. DETAILED DESCRIPTION

[0032] To better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments. It should be understood by those skilled in the art that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] Unless otherwise specified, the experimental methods used in the examples are all conventional methods; the materials, reagents, etc. used, unless otherwise specified, can be obtained from commercial channels.

[0034] Example 1

[0035] A method for removing organic micropollutants from water, comprising the following steps:

[0036] (1) adding an aqueous solution of CBZ into a glass vessel containing a certain buffer solution (pH = 4.0, 5 mmol / L acetic acid) to obtain a mixed solution; the concentration of CBZ in the mixed solution is 2 μmol / L;

[0037] (2) Adding an oxidant HOCl to the mixed solution obtained in step (1) so that the concentration of HOCl in the solution is 40 μmol / L, and allowing to react at -25°C.

[0038] The schematic diagram of the principle of the method for removing organic micropollutants in water according to the present invention is as follows Figure 1 shown.

[0039] Water samples were taken after different minutes of reaction, and the remaining HOCl was captured with excess sodium thiosulfate solution to terminate the reaction. The remaining CBZ concentration in the solution was determined by high performance liquid chromatography, and the removal rate of CBZ was calculated. Among them, the removal rate was 56.21% after 5 minutes, 94.7% after 10 minutes, and 96.75% after 150 minutes.

[0040] Example 2

[0041] A method for removing organic micropollutants from water, comprising the following steps:

[0042] (1) adding an aqueous solution of CBZ into a glass vessel containing a certain buffer solution (pH = 4.0, 5 mmol / L acetic acid) to obtain a mixed solution; the concentration of CBZ in the mixed solution is 2 μmol / L;

[0043] (2) Adding NaCl solution to the mixed solution obtained in step (1) to make the Cl - The concentration is 0.1mmol / L, and then the oxidant HOCl is added to make the concentration of HOCl in the solution 40μmol / L, and the reaction is allowed to stand at -25℃.

[0044] Water samples were taken after different minutes of reaction, and the remaining HOCl was captured with excess sodium thiosulfate solution to terminate the reaction. The concentration of remaining CBZ in the solution was determined by high performance liquid chromatography, and the removal rate of CBZ was calculated. Among them, the removal rate was 68.89% after 5 minutes and 98.5% after 10 minutes.

[0045] Example 3

[0046] The difference between this embodiment and embodiment 2 is that in step (2), Cl in the mixed solution - The concentration is 1 mmol / L, and the rest is the same as in Example 2. In this example, the removal rate is 93.42% after 5 minutes, and the removal rate is 99.88% after 10 minutes.

[0047] Example 4

[0048] The difference between this embodiment and embodiment 1 is that in step (1), the pH of the buffer solution is 5.0, and the rest is the same as embodiment 1. In this embodiment, the removal rate after 5 minutes is 17.1%, after 10 minutes is 93.25%, and after 150 minutes is 98.02%.

[0049] Example 5

[0050] The difference between this embodiment and embodiment 2 is that in step (1), the pH of the buffer solution is 5.0, and the rest is the same as embodiment 2. In this embodiment, the removal rate after 5 minutes is 27.47%, after 10 minutes is 93.83%, and after 150 minutes is 96.64%.

[0051] Example 6

[0052] The difference between this embodiment and embodiment 3 is that in step (1), the pH of the buffer solution is 5.0, and the rest is the same as embodiment 3. In this embodiment, the removal rate after 5 minutes is 29.43%, and the removal rate after 10 minutes is 97.96%.

[0053] Example 7

[0054] The difference between this embodiment and embodiment 1 is that in step (1), the pH of the buffer solution is 6.5 (5 mmol / L sodium dihydrogen phosphate), and the rest is the same as embodiment 1. In this embodiment, the removal rate after 5 minutes is 17.34%, the removal rate after 10 minutes is 89.05%, and the removal rate after 150 minutes is 96.29%.

[0055] Example 8

[0056] The difference between this embodiment and embodiment 2 is that in step (1), the pH of the buffer solution is 6.5 (5 mmol / L sodium dihydrogen phosphate), and the rest is the same as embodiment 2. In this embodiment, the removal rate after 5 minutes is 23.87%, after 10 minutes is 91.2%, and after 150 minutes is 98.38%.

[0057] Example 9

[0058] The difference between this embodiment and embodiment 3 is that in step (1), the pH of the buffer solution is 6.5 (5 mmol / L sodium dihydrogen phosphate), and the rest is the same as embodiment 3. In this embodiment, the removal rate after 5 minutes is 26.81%, after 10 minutes is 92.85%, and after 150 minutes is 98.05%.

[0059] Example 10

[0060] A method for removing organic micropollutants from water, comprising the following steps:

[0061] (1) adding an aqueous solution of IBP into a glass vessel containing a certain buffer solution (pH=6.5, 5 mmol / L sodium dihydrogen phosphate) to obtain a mixed solution; the concentration of IBP in the mixed solution is 2 μmol / L;

[0062] (2) Adding an oxidant HOCl to the mixed solution obtained in step (1) so that the concentration of HOCl in the solution is 40 μmol / L, and allowing to react at -25°C.

[0063] After 180 min of reaction, water samples were taken and the reaction was terminated by capturing the remaining HOCl with an excess of sodium thiosulfate solution. The concentration of residual IBP in the solution was determined by high performance liquid chromatography, and the removal rate of IBP was calculated. After 180 min, the removal rate was 20.24%.

[0064] Embodiment 11

[0065] A method for removing organic micropollutants from water, comprising the following steps:

[0066] (1) adding an aqueous solution of IBP into a glass vessel containing a certain buffer solution (pH=6.5, 5 mmol / L sodium dihydrogen phosphate) to obtain a mixed solution; the concentration of IBP in the mixed solution is 2 μmol / L;

[0067] (2) Adding NaCl solution to the mixed solution obtained in step (1) to make the Cl - The concentration is 0.1mmol / L, and then the oxidant HOCl is added to make the concentration of HOCl in the solution 40μmol / L, and the reaction is allowed to stand at -25℃.

[0068] After 180 min of reaction, water samples were taken and the reaction was terminated by capturing the remaining HOCl with an excess of sodium thiosulfate solution. The concentration of residual IBP in the solution was determined by high performance liquid chromatography, and the removal rate of IBP was calculated. After 180 min, the removal rate was 28.28%.

[0069] Example 12

[0070] The difference between this embodiment and embodiment 11 is that in step (2), Cl in the mixed solution - The concentration was 1 mmol / L, and the rest was the same as in Example 11. In this example, the removal rate after 180 min was 36.14%.

[0071] Example 13

[0072] The difference between this embodiment and embodiment 1 is that in step (2), the oxidant is NaOCl instead of HOCl, and the rest of the method is the same as that of embodiment 1. The removal rate of this embodiment after 10 minutes is 89.05%.

[0073] Embodiment 14

[0074] The difference between this embodiment and embodiment 1 is that in step (2), the oxidant is KMnO4 instead of HOCl, and the rest of the method is the same as that of embodiment 1. After 10 minutes of reaction, a water sample is taken, and the reaction is terminated by capturing the remaining KMnO4 with an ascorbic acid solution, and the concentration of the remaining CBZ in the solution is measured by a high performance liquid chromatograph. In this embodiment, the removal rate after 10 minutes is 98.25%.

[0075] Embodiment 15

[0076] The difference between this embodiment and embodiment 7 is that in step (1), the organic micropollutant is CA instead of CBZ, and the rest of the method is the same as that of embodiment 7. The removal rate of this embodiment after 10 minutes is 98.57%.

[0077] Example 16

[0078] The difference between this embodiment and embodiment 7 is that in step (1), the organic micropollutant is SA instead of CBZ, and the rest of the method is the same as that of embodiment 7. In this embodiment, the removal rate is 99.95% after 10 minutes, and the removal rate is 100% after 120 minutes.

[0079] Embodiment 17

[0080] The difference between this embodiment and embodiment 7 is that in step (2), the reaction temperature is -20°C instead of -25°C, and the rest of the method is the same as that of embodiment 7. The removal rate of this embodiment after 10 minutes is 89.05%.

[0081] Embodiment 18

[0082] The difference between this embodiment and embodiment 8 is that in step (2), Cl in the mixed solution - The concentration was 5 mmol / L, and the rest of the methods were the same as in Example 8. In this example, the removal rate after 10 minutes was 98.25%.

[0083] Embodiment 19

[0084] The difference between this embodiment and embodiment 9 is that in step (2), Na2SO4 solution is added to the mixed solution obtained in step (1) to make SO4 2- The concentration was 1 mmol / L, no NaCl solution was added, and the rest of the method was the same as in Example 9. In this example, the removal rate after 10 minutes was 90.65%.

[0085] Embodiment 20

[0086] The difference between this embodiment and embodiment 9 is that in step (2), NaNO3 solution is added to the mixed solution obtained in step (1) to make NO3 in the mixed solution -The concentration was 1 mmol / L, no NaCl solution was added, and the rest of the method was the same as in Example 9. In this example, the removal rate after 10 minutes was 95.30%.

[0087] Comparative Example 1

[0088] The difference between the comparative example and Example 1 is that in step (1), the pH of the buffer solution is 8 (5 mmol / L sodium tetraborate), and the rest is the same as Example 1. The removal rate of this comparative example is 17.72% after 5 minutes and 69.06% after 10 minutes.

[0089] Comparative Example 2

[0090] The difference between the comparative example method and Example 1 is that in step (1), the pH of the buffer solution is 9 (5 mmol / L sodium tetraborate), and the rest is the same as Example 1. The removal rate of this comparative example is 1.78% after 5 minutes, 32.64% after 10 minutes, and 64.15% after 150 minutes.

[0091] Comparative Example 3

[0092] The difference between this comparative example and Example 2 is that in step (1), the pH of the buffer solution is 9 (5 mmol / L sodium tetraborate), and the rest is the same as Example 2. The removal rate of this comparative example is 0.90% after 5 minutes, 38.21% after 10 minutes, and 65.62% after 150 minutes.

[0093] Comparative Example 4

[0094] The difference between this comparative example and Example 3 is that in step (1), the pH of the buffer solution is 9 (5 mmol / L sodium tetraborate), and the rest is the same as Example 3. The removal rate of this comparative example is 15.31% after 5 minutes, and the removal rate after 10 minutes is 49.41%.

[0095] Comparative Example 5

[0096] The difference between this comparative example and Example 1 is that in step (1), the pH of the buffer solution is 10 (5 mmol / L sodium tetraborate), and the rest is the same as Example 1. The removal rate of this comparative example is 0% after 5 minutes, 0% after 10 minutes, and 12.39% after 150 minutes.

[0097] Comparative Example 6

[0098] The difference between this comparative example and Example 2 is that in step (1), the pH of the buffer solution is 10 (5 mmol / L sodium tetraborate), and the rest is the same as Example 2. The removal rate of this comparative example is 11.39% after 5 minutes, 13.65% after 10 minutes, and 15.92% after 150 minutes.

[0099] Comparative Example 7

[0100] The difference between this comparative example and Example 3 is that in step (1), the pH of the buffer solution is 10 (5 mmol / L sodium tetraborate), and the rest is the same as Example 3. The removal rate of this comparative example is 0.88% after 5 minutes, 5.30% after 10 minutes, and 22.98% after 150 minutes.

[0101] Comparative Example 8

[0102] The difference between the comparative example and Example 1 is that in step (2), the reaction temperature is 22°C instead of -25°C, and the reaction is allowed to stand, and the rest is the same as Example 1. The removal rate of this comparative example after 150 minutes is 51.89%.

[0103] Comparative Example 9

[0104] The difference between the comparative example and Example 2 is that in step (2), the reaction temperature is 22°C instead of -25°C, and the reaction is allowed to stand, and the rest is the same as Example 2. The removal rate of this comparative example after 150 minutes is 83.59%.

[0105] Comparative Example 10

[0106] The difference between the comparative example and Example 3 is that in step (2), the reaction temperature is 22°C instead of -25°C, and the reaction is allowed to stand, and the rest is the same as Example 3. The removal rate of this comparative example after 150 minutes is 94.72%.

[0107] Comparative Example 11

[0108] The difference between the method of this comparative example and Example 10 is that in step (2), the reaction temperature is 20°C instead of -25°C, and the rest of the method is the same as Example 10. The removal rate of this comparative example is 0% after 1440 min.

[0109] Comparative Example 12

[0110] The difference between the method of this comparative example and Example 13 is that in step (2), the reaction temperature is 22°C instead of -25°C, and the rest of the method is the same as Example 13. The removal rate of this comparative example after 10 minutes is 2.47%.

[0111] Comparative Example 13

[0112] The difference between the method of this comparative example and Example 14 is that in step (2), the reaction temperature is 22°C instead of -25°C, and the rest of the method is the same as Example 14. The removal rate of this comparative example after 10 minutes is 86.3%.

[0113] Comparative Example 14

[0114] The difference between the comparative example and Example 15 is that in step (2), the reaction temperature is 22°C instead of -25°C, and the rest of the method is the same as Example 15. The removal rate of this comparative example after 120 minutes is 5.03%.

[0115] Comparative Example 15

[0116] The difference between the comparative example and Example 16 is that in step (2), the reaction temperature is 22°C instead of -25°C, and the rest of the method is the same as Example 16. The removal rate of this comparative example after 120 minutes is 25.36%.

[0117] Comparative Example 16

[0118] The difference between this comparative example and Example 7 is that in step (2), the reaction temperature is -10°C instead of -25°C, and the rest of the method is the same as Example 7. The removal rate of this comparative example after 10 minutes is 27.25%.

[0119] Comparative Example 17

[0120] The difference between this comparative example and Example 7 is that in step (2), the reaction temperature is -15°C instead of -25°C, and the rest of the method is the same as Example 7. The removal rate of this comparative example after 10 minutes is 29.51%.

[0121] Comparative Example 18

[0122] The difference between this comparative example and Example 9 is that in step (2), NaHCO3 solution is added to the mixed solution obtained in step (1) to make the HCO3 in the mixed solution - The concentration was 1 mmol / L, and the rest of the methods were the same as those in Example 9. The removal rate of this comparative example was 84.80% after 10 minutes.

[0123] Comparative Example 19

[0124] The difference between this comparative example and Example 9 is that in step (2), NaNO2 solution is added to the mixed solution obtained in step (1) to make NO2 in the mixed solution - The concentration was 1 mmol / L, and the rest of the methods were the same as those in Example 9. The removal rate of this comparative example was 0% after 10 minutes.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A method for removing organic micropollutants from water, It is characterized in that The following steps are involved: (1) adjusting the pH of an aqueous solution containing organic micropollutants to be acidic to obtain a mixed solution; (2) Add an oxidant to the mixed solution obtained in step (1) and react at -20°C to -40°C.

2. The method for removing organic micropollutants in water according to claim 1, It is characterized in that In the step (1), the organic micropollutants include at least one of carbamazepine, ibuprofen, cinnamic acid, and sorbic acid.

3. The method for removing organic micropollutants in water according to claim 1, It is characterized in that In the step (1), the pH of the mixed solution does not exceed 6.

5.

4. The method for removing organic micropollutants in water according to claim 1, It is characterized in that In the step (1), the concentration of the organic micropollutants in the mixed solution is 1 μmol / L-3 μmol / L.

5. The method for removing organic micropollutants in water according to claim 1, It is characterized in that In the step (2), the oxidant includes at least one of hypochlorous acid, sodium hypochlorite, and potassium permanganate.

6. The method for removing organic micropollutants in water according to claim 1, It is characterized in that In the step (2), the concentration of the oxidant in the solution system is 30 μmol / L-50 μmol / L.

7. The method for removing organic micropollutants in water according to claim 1, It is characterized in that In the step (2), the reaction temperature is -20°C to -25°C.

8. The method for removing organic micropollutants in water according to claim 1, It is characterized in that In the step (2), a soluble salt is further added to the mixed solution obtained in the step (1), and the soluble salt includes at least one of chloride, sulfate, and nitrate.

9. The method for removing organic micropollutants in water according to claim 8, It is characterized in that The concentration of the anions in the soluble salt in the solution system is not less than 0.05 mmol / L.

10. Use of the method for removing organic micropollutants in water according to any one of claims 1 to 9 in water treatment.

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