Method for removing new pollutants in water by using far ultraviolet assisted sodium hypochlorite system

Abstract

The invention belongs to the technical field of water treatment, and relates to a method for removing new pollutants in water by using a far ultraviolet assisted sodium hypochlorite system. The method comprises the following steps: S1, adjusting the pH value of a to-be-treated aqueous solution containing new pollutants to 4-10; s2, adding a sodium hypochlorite oxidizing agent into the aqueous solution to be treated and continuously stirring; and S3, carrying out a reaction under the ultraviolet wavelength of 200 to 230 nm. Compared with the prior art, the method has the advantages that the far ultraviolet light source and the sodium hypochlorite are jointly applied, so that the oxidation capacity of the sodium hypochlorite is improved, meanwhile, the high-energy characteristic of far ultraviolet light is fully played, efficient photocatalytic degradation of new pollutants difficult to degrade is realized, and the overall water treatment efficiency is remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for removing new pollutants in water by a far ultraviolet-assisted sodium hypochlorite system. Background Art

[0002] New pollutants refer to toxic and hazardous chemicals that are biologically toxic, environmentally persistent, and bioaccumulative. Traditional water treatment technologies are unable to efficiently remove and control such trace pollutants. In addition, their migration and transformation pathways in the environment are complex and changeable, and they may eventually infiltrate natural water bodies, posing a potential threat to human health and the ecological environment, thus arousing widespread social concern. Strengthening the control of new pollutants is in line with the concept of sustainable development, is an inevitable requirement for ensuring environmental safety, and is of great significance for preventing environmental and health risks.

[0003] UV / chlorine is a relatively new advanced oxidation technology (AOPs) used in water treatment. Its working principle is to use ultraviolet light to photolyze chlorine to generate hydroxyl radicals (HO·) and other reactive chlorine species (RCS), thereby degrading new pollutants in the water. This technology can also provide multiple disinfection effects and maintain residual chlorine protection in the water supply system. It is well known that the choice of UV light source has an important influence on the efficiency of the UV / chlorine process. This is because the molar absorption coefficient and quantum yield of substances at different wavelengths are not the same, which in turn affects the generation of active species. The commonly used UV light source is the traditional mercury lamp, but it has shortcomings such as mercury pollution and long preheating time. In addition, at a wavelength of 254nm, the quantum yield of chlorine is low, resulting in UV 254 / The active species yield of chlorine is limited, which in turn affects its treatment efficiency.

[0004] Therefore, simply adjusting the UV dose and chlorine addition cannot fundamentally improve the overall water treatment capacity of the process. Finding a more effective and efficient UV light source to optimize and improve the pollutant degradation performance of UV / chlorine technology has important theoretical and application value.

[0005] Patent application CN113105046A discloses a method for simultaneously removing organic pollutants and suspended solids in water, wherein trivalent iron salt is added to sewage containing organic pollutants and suspended solids, and the pH value of the sewage is adjusted to 2.0-8.0 to obtain sewage with a pH value of 2.0-8.0; the sewage with a pH value of 2.0-8.0 is reacted under conditions of ultraviolet light irradiation and stirring to remove organic pollutants and suspended solids in the sewage, thereby solving the problems of low removal rate of organic pollutants by single use of ultraviolet light degradation, suspended solids in the water body hindering the propagation of ultraviolet light, and the use of oxidants leading to increased treatment costs, and residual oxidants also causing secondary pollution to the water body. However, the patent application has the following deficiencies: 1. Limitation of ultraviolet wavelength and light source: using a 254nm low-pressure mercury lamp, there are problems such as low photon energy, mercury pollution, and long preheating time; 2. The singleness of technical means: it mainly relies on the combination of trivalent iron salts and low-pressure mercury lamps to degrade organic matter and remove suspended solids, lacks more efficient oxidants to assist, and the continuous supply of free radical concentration is limited; 3. Dependence on water clarity: The effectiveness of this patent depends on the flocculation effect of trivalent iron salts and the clarity of water bodies. It may be difficult to ensure efficient reaction when the water quality is complex and there are more suspended solids; 4. Secondary pollution and subsequent treatment issues: This patent uses trivalent iron salts as auxiliary agents. The sludge and flocculation products generated after the reaction need to be further treated, which increases the treatment cost and has a potential risk of secondary pollution. Summary of the invention

[0006] The purpose of the present invention is to overcome the problems existing in the above-mentioned prior art and to provide a method for removing new pollutants in water by a far-ultraviolet-assisted sodium hypochlorite system. The method has a strong universal degradation ability for different types of organic pollutants and a high degradation rate.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] The present invention provides a method for removing new pollutants in water by a far ultraviolet-assisted sodium hypochlorite system, comprising the following steps:

[0009] S1, adjusting the pH of the aqueous solution to be treated containing new pollutants to 4-10;

[0010] S2, adding sodium hypochlorite oxidant to the aqueous solution to be treated and stirring continuously;

[0011] S3, reacts at an ultraviolet wavelength of 200-230nm.

[0012] Furthermore, in step S1, the molar concentration of the new pollutant in the aqueous solution to be treated is 5-15 mM.

[0013] Furthermore, in step S1, the new pollutant is selected from at least one of carbamazepine, iohexol, sulfamethoxazole, acetochlor or ibuprofen.

[0014] Furthermore, in step S2, the molar concentration of the sodium hypochlorite oxidant in the aqueous solution to be treated is 50-400 μM.

[0015] Furthermore, in step S2, the stirring speed is 300-500 rpm.

[0016] Furthermore, in step S3, the ultraviolet wavelength is 221-223 nm.

[0017] Furthermore, in step S3, the reaction is carried out in a Far-UVC irradiation device.

[0018] Furthermore, the Far-UVC irradiation device includes six major parts, namely, an outer light-proof black box, a krypton chloride excimer lamp, a heat sink, a collimator, a magnetic stirrer and a reaction area, wherein the heat sink is arranged on the back of the circuit device.

[0019] Furthermore, in step S3, the reaction is carried out at room temperature in the dark.

[0020] Furthermore, the reaction time is 2-60 min.

[0021] The present invention also provides an application of any of the above-mentioned far-ultraviolet-assisted sodium hypochlorite systems in water treatment, which can efficiently degrade multiple new pollutants (carbamazepine, iohexol, sulfamethoxazole, acetochlor, ibuprofen) of multiple categories (antibiotics, endocrine disruptors, pesticides) in water to meet increasingly stringent water quality standards.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The present invention provides a method for removing new pollutants in water by using a far-ultraviolet-assisted sodium hypochlorite system. The synergistic effect of far-ultraviolet light and sodium hypochlorite is utilized to not only improve the oxidation capacity of sodium hypochlorite, but also give full play to the high energy characteristics of far-ultraviolet light, thereby achieving efficient photocatalytic degradation of difficult-to-degrade new pollutants and significantly improving the overall water treatment efficiency.

[0024] (2) The present invention provides a method for removing new pollutants from water by a far-ultraviolet-assisted sodium hypochlorite system. The method reacts at an ultraviolet wavelength of 200-230 nm. The light absorption capacity of sodium hypochlorite in the far-ultraviolet band of 200-230 nm is much better than that of traditional 254 nm ultraviolet light, so that it exhibits better degradation activity and better economic benefits under far-ultraviolet light irradiation than under mercury lamp irradiation conditions, thereby broadening the application scope of sodium hypochlorite in the field of water treatment and effectively reducing the processing cost of the process.

[0025] (3) The present invention provides a method for removing new pollutants in water by a far-ultraviolet-assisted sodium hypochlorite system, which adopts a krypton chloride excimer lamp as a far-ultraviolet light source. It not only abandons the use of toxic mercury elements, but also exhibits multiple advantages such as a shorter startup stabilization time, a photoelectric conversion efficiency of up to about 10%, a lower ozone generation and higher human safety.

[0026] (4) The far-UV-assisted sodium hypochlorite system of the present invention can be used to efficiently degrade a variety of new pollutants (carbamazepine, iohexol, sulfamethoxazole, acetochlor, ibuprofen) of multiple categories (antibiotics, endocrine disruptors, pesticides) in water to meet the increasingly stringent water quality standards.

[0027] (5) Compared with the shortcomings of patent application CN113105046A, the krypton chloride (KrCl*) excimer lamp (222nm) used in the present invention not only has higher photon energy, no mercury pollution, but also can operate faster and more stably. In addition, many organic pollutants and oxidants have higher molar absorption coefficients or quantum yields at a wavelength of 222nm, so under far-ultraviolet conditions, the photocatalytic efficiency is significantly improved, and the removal effect of pollutants is better; and by introducing oxidants such as sodium hypochlorite, combined with far-ultraviolet light sources, higher concentrations of active species (such as active chlorine) can be continuously generated in water, greatly improving the degradation rate of pollutants and achieving more efficient removal effects; in addition, the far-ultraviolet / sodium hypochlorite system does not rely on iron salt flocculation and precipitation, reduces the generation and treatment requirements of sludge, reduces the risk of secondary pollution and maintenance costs, and meets the requirements of more environmentally friendly water treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The degradation performance test diagram of carbamazepine in Example 1 of the present invention and Comparative Examples 1-3;

[0029] Figure 2 The photoelectric efficiency diagram of carbamazepine degradation in Example 1 of the present invention and Comparative Examples 2-3;

[0030] Figure 3 It is a test diagram of the degradation performance of various new pollutants in Examples 1-5 of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the Far-UVC irradiation device used in the present invention. DETAILED DESCRIPTION

[0032] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0033] Unless otherwise specified, the reagents, methods, instruments and equipment used in the present invention are conventional reagents, methods, instruments and equipment in the art. Unless otherwise specified, the reagents and materials used in the following examples are commercially available.

[0034] The present invention provides a method for removing new pollutants in water by a far ultraviolet-assisted sodium hypochlorite oxidant system, comprising the following steps:

[0035] S1, adjusting the pH of the aqueous solution to be treated containing new pollutants to 4-10; the new pollutants are selected from at least one of carbamazepine, iohexol, sulfamethoxazole, acetochlor or ibuprofen; the molar concentration of the new pollutants in the aqueous solution to be treated is 5-15mM.

[0036] S2, adding sodium hypochlorite oxidant to the aqueous solution to be treated and stirring continuously, the stirring speed is 300-500rpm; the molar concentration of the sodium hypochlorite oxidant in the aqueous solution to be treated is 50-400μM;.

[0037] S3, reacting in a Far-UVC irradiation device at room temperature and in the dark within the ultraviolet wavelength range of 200-230 nm, the reaction time is 2-60 min; preferably the ultraviolet wavelength is 221-223 nm, more preferably 222 nm.

[0038] The above-mentioned far-ultraviolet-assisted sodium hypochlorite system method for removing new pollutants in water can be used for water treatment, and can efficiently degrade a variety of new pollutants (carbamazepine, iohexol, sulfamethoxazole, acetochlor, ibuprofen) in multiple categories (antibiotics, endocrine disruptors, pesticides) in water to meet the increasingly stringent water quality standards.

[0039] The Far-UVC irradiation device in the following examples and comparative examples is as follows: Figure 4 As shown, it includes six major parts, namely, an outer light-proof black box, a krypton chloride excimer lamp, a heat sink, a collimator, a magnetic stirrer and a reaction area, wherein the heat sink is arranged on the back of the circuit device.

[0040] Example 1

[0041] This embodiment provides a method for removing carbamazepine from water using a far-ultraviolet-assisted sodium hypochlorite system, comprising the following steps:

[0042] (1) Add phosphate buffer solution to the aqueous solution containing carbamazepine to a final carbamazepine concentration of 10 mM, and adjust the pH to 7.0 using 1 M sodium hydroxide solution and 0.18 M dilute sulfuric acid solution. Place the solution to be treated with the adjusted pH in a culture dish and place it in a Far-UVC irradiation device; place the culture dish on a magnetic stirrer and stir it at a constant speed of 450 rpm.

[0043] (2) Add NaClO oxidant at a concentration of 200 μM to the solution.

[0044] (3) Turn on the Far-UVC irradiation device with an ultraviolet wavelength of 222 nm, and perform a photocatalytic degradation reaction of the solution at room temperature in the dark, and stop the reaction after 45 minutes.

[0045] Example 2

[0046] This embodiment provides a method for removing iohexol from water using a far-ultraviolet-assisted sodium hypochlorite system, comprising the following steps:

[0047] (1) Add phosphate buffer solution to the aqueous solution containing iohexol to a final concentration of 10 mM iohexol, and adjust the pH to 7.0 using 1 M sodium hydroxide solution and 0.18 M dilute sulfuric acid solution. Place the solution to be treated with the adjusted pH in a culture dish, and place it in a Far-UVC irradiation device; place the culture dish on a magnetic stirrer, and stir it at a constant speed at 450 rpm.

[0048] (2) Add NaClO oxidant at a concentration of 200 μM to the solution.

[0049] (3) Turn on the Far-UVC irradiation device with an ultraviolet wavelength of 222 nm, and perform a photocatalytic degradation reaction of the solution at room temperature in the dark, and stop the reaction after 45 minutes.

[0050] Example 3

[0051] This embodiment provides a method for removing ibuprofen from water using a far-ultraviolet-assisted sodium hypochlorite system, comprising the following steps:

[0052] (1) Add phosphate buffer solution to an aqueous solution containing ibuprofen to a final ibuprofen concentration of 10 mM, and adjust the pH to 7.0 using 1 M sodium hydroxide solution and 0.18 M dilute sulfuric acid solution. Place the solution to be treated with the adjusted pH in a culture dish and place it in a Far-UVC irradiation device; place the culture dish on a magnetic stirrer and stir it at a constant speed of 450 rpm.

[0053] (2) Add NaClO oxidant at a concentration of 200 μM to the solution.

[0054] (3) Turn on the Far-UVC irradiation device with an ultraviolet wavelength of 222 nm, and perform a photocatalytic degradation reaction of the solution at room temperature in the dark, and stop the reaction after 45 minutes.

[0055] Example 4

[0056] This embodiment provides a method for removing sulfamethoxazole in water using a far-ultraviolet-assisted sodium hypochlorite system, comprising the following steps:

[0057] (1) Add phosphate buffer solution to the aqueous solution containing sulfamethoxazole to a final concentration of sulfamethoxazole of 10 mM, and adjust the pH to 7.0 using 1 M sodium hydroxide solution and 0.18 M dilute sulfuric acid solution. Place the solution to be treated with the adjusted pH in a culture dish and place it in a Far-UVC irradiation device; place the culture dish on a magnetic stirrer and stir it at a constant speed of 450 rpm.

[0058] (2) Add NaClO oxidant at a concentration of 200 μM to the solution.

[0059] (3) Turn on the Far-UVC irradiation device with an ultraviolet wavelength of 222 nm, and perform a photocatalytic degradation reaction of the solution at room temperature in the dark, and stop the reaction after 45 minutes.

[0060] Example 5

[0061] This embodiment provides a method for removing acetochlor from water using a far-ultraviolet-assisted sodium hypochlorite system, comprising the following steps:

[0062] (1) A phosphate buffer solution is added to an aqueous solution containing acetochlor until the final concentration of acetochlor is 10 mM, and a 1 M sodium hydroxide solution and a 0.18 M dilute sulfuric acid solution are used to adjust the pH to 7.0. The solution to be treated after the pH adjustment is placed in a culture dish and placed in a Far-UVC irradiation device; the culture dish is placed on a magnetic stirrer and stirred at a constant speed at 450 rpm.

[0063] (2) Add NaClO oxidant at a concentration of 200 μM to the solution.

[0064] (3) Turn on the Far-UVC irradiation device with an ultraviolet wavelength of 222 nm, and perform a photocatalytic degradation reaction of the solution at room temperature in the dark, and stop the reaction after 45 minutes.

[0065] Comparative Example 1

[0066] This comparative example provides a method for removing carbamazepine from water, and the specific steps are as follows:

[0067] (1) A phosphate buffer solution is added to an aqueous solution containing carbamazepine to a final carbamazepine concentration of 10 mM, and a 1 M sodium hydroxide solution and a 0.18 M dilute sulfuric acid solution are used to adjust the pH to 7.0. The solution to be treated with the adjusted pH is placed in a culture dish and placed in a conventional mercury lamp irradiation device; the culture dish is placed on a magnetic stirrer and stirred at a constant speed of 450 rpm.

[0068] (2) Turn on the conventional mercury lamp irradiation device, the ultraviolet wavelength is 254 nm, the solution is reacted in the dark at room temperature, and the reaction is stopped after the ultraviolet dose is consistent with that in Example 1.

[0069] Comparative Example 2

[0070] This comparative example provides a method for removing carbamazepine from water, and the specific steps are as follows:

[0071] (1) A phosphate buffer solution is added to an aqueous solution containing carbamazepine to a final carbamazepine concentration of 10 mM, and a 1 M sodium hydroxide solution and a 0.18 M dilute sulfuric acid solution are used to adjust the pH to 7.0. The solution to be treated with the adjusted pH is placed in a culture dish and placed in a conventional mercury lamp irradiation device; the culture dish is placed on a magnetic stirrer and stirred at a constant speed of 450 rpm.

[0072] (2) Turn on the Far-UVC irradiation device with an ultraviolet wavelength of 222 nm, and perform a photocatalytic degradation reaction of the solution at room temperature in the dark, and stop the reaction after 45 minutes.

[0073] Comparative Example 3

[0074] This comparative example provides a method for removing carbamazepine from water, and the specific steps are as follows:

[0075] (1) A phosphate buffer solution is added to an aqueous solution containing carbamazepine to a final carbamazepine concentration of 10 mM, and a 1 M sodium hydroxide solution and a 0.18 M dilute sulfuric acid solution are used to adjust the pH to 7.0. The solution to be treated with the adjusted pH is placed in a culture dish and placed in a conventional mercury lamp irradiation device; the culture dish is placed on a magnetic stirrer and stirred at a constant speed of 450 rpm.

[0076] (2) Add NaClO oxidant to the solution at a final concentration of 200 μM.

[0077] (3) Turn on the conventional mercury lamp irradiation device, the ultraviolet wavelength is 254 nm, the solution is reacted at room temperature in the dark, and the reaction is stopped after the ultraviolet dose is consistent with that in Example 1.

[0078] Comparative Example 4

[0079] This comparative example provides a method for removing carbamazepine from water, and the specific steps are as follows:

[0080] (1) Add phosphate buffer solution to the aqueous solution containing carbamazepine to a final carbamazepine concentration of 10 mM, and adjust the pH to 7.0 using 1 M sodium hydroxide solution and 0.18 M dilute sulfuric acid solution. Place the solution to be treated with the adjusted pH in a culture dish; place the culture dish on a magnetic stirrer and stir at a constant speed of 450 rpm.

[0081] (2) Add NaClO oxidant to the solution at a final concentration of 200 μM.

[0082] (3) The solution was reacted at room temperature in the dark and the reaction was stopped after 45 min.

[0083] The following photodegradation performance tests were performed on Examples 1-5 and Comparative Examples 1-4.

[0084] Detection instruments: The concentrations of new pollutants (carbamazepine, iohexol, ibuprofen, sulfamethoxazole and acetochlor) in this study were detected using an Agilent HPLC1260 high performance liquid chromatograph (UPLC) equipped with a UV detector and a Waters HPLC system. MS C18 chromatographic column (250.00 mm×2.10 mm, 3.50 μm).

[0085] Test method: Before the degradation experiment begins, prepare the substrate stock solution used in the experiment as needed, including the substrate carbamazepine solution, iohexol solution, ibuprofen solution, sulfamethoxazole solution and acetochlor solution of the corresponding experiment. Before the experiment, dilute the mother solution to the target concentration (10μM), add phosphate buffer solution to a concentration of 10mM, and adjust the pH value to the required value by adding NaOH and dilute H2SO4 solution.

[0086] At the beginning of the experiment, 50mL of the reaction solution was placed in a culture dish and a small magnet was placed in the container. In the degradation experiment, the reaction container was placed on a magnetic stirrer and stirred at the same speed. In Examples 1-5 and Comparative Examples 3-4, an oxidant (sodium hypochlorite) with an oxidant concentration of 200μM was added according to the experimental requirements. For experiments requiring photocatalysis, the Far-UVC device or the traditional mercury lamp device was simultaneously turned on for ultraviolet irradiation, and the reaction started timing. The reaction stopped after the experimental required time, wherein the experimental time of Examples 1-5 and Comparative Examples 2 and 4 was 45min, and the experimental time of Comparative Examples 1 and 3 was until the ultraviolet dose was the same as that of Example 1. Take out 1mL of the water sample and inject it into the liquid phase vial, and add a quencher (Na2S2O3) to quench the remaining oxidant, shake well and wait for high performance liquid chromatography detection. Figure 1 C t / C0 is the ordinate, UV dose (mJ cm -2 ) is the horizontal axis. Figure 2 In the figure, EE / O (KWh / L) is the vertical axis and different examples are the horizontal axis. Figure 3 C t / C0 is the ordinate and time (min) is the abscissa. t represent the initial concentration and reaction concentration of organic matter respectively.

[0087] Figure 1 The figure is a test diagram of the degradation performance of carbamazepine in Example 1 of the present invention and Comparative Examples 1-3. Figure 1 The data shown in the figure confirm that the sodium hypochlorite system exhibits excellent degradation ability for carbamazepine in water under the assistance of 222nm far-ultraviolet light; UV alone 222 Under the conditions of (Comparative Example 2), the degradation rate of carbamazepine within 45 minutes was only 32.3%, and efficient removal was not achieved. Under the conditions of sodium hypochlorite alone (Comparative Example 4), the degradation rate of carbamazepine within 45 minutes was only 5.45%, and efficient removal was also not achieved. However, when sodium hypochlorite was introduced into the far-ultraviolet system (Example 1), the degradation effect of carbamazepine was significantly enhanced, and the degradation rate reached 92.5% within the same time. For comparison, the present invention also investigated UV 254 The degradation of carbamazepine by the system (Comparative Examples 1 and 3). Under the same UV dose, UV alone 254 Irradiation can hardly degrade carbamazepine (Comparative Example 1). 254 Compared with chlorine (Comparative Example 3), UV 222 / chlorine (Example 1) promoted the degradation of carbamazepine by 1.18 times.

[0088] The present invention further evaluates the EE / O values ​​of different systems (Example 1 and Comparative Examples 2-3). The EE / O value is often used to evaluate the operating cost of AOPs. EE / O represents the electrical energy required to degrade one order of magnitude of organic matter in 1L of solution (kWh L -1 ), the lower the value, the lower the energy consumption of the process and the higher the photoelectric conversion efficiency. In the present invention, the EE / O value takes into account the power consumption of the ultraviolet light source (EE / O UV222orUV254 ) and oxidant consumption (EE / O NaClO ).

[0089] Figure 2 Figure 2 is a graph showing the photoelectric efficiency of carbamazepine degradation in Example 1 of the present invention and Comparative Examples 2-3. Figure 2 The calculation results show that UV 222 The EE / O value of the / chlorine system is 0.53, which is lower than that of UV 254 / Chlorine (1.08) and UV alone 222 System (3.55), indicating UV 222 / Chlorine is a new, efficient and economical pollutant removal technology that is in line with the concept of sustainable development.

[0090] To evaluate UV 222 / Application prospects of sodium hypochlorite system in actual water treatment. The present invention selected five representative new pollutants (carbamazepine, iohexol, ibuprofen, sulfamethoxazole and acetochlor) for degradation experiments (Examples 1-5), which cover a variety of organic pollutant categories and can more comprehensively reflect the degradation ability of the system.

[0091] Figure 3 The degradation performance test diagram of various new pollutants in Examples 1-5 of the present invention is shown in FIG. Figure 3 As shown in the figure, the five new pollutants selected were significantly degraded within 45 minutes, with the degradation rates of carbamazepine, iohexol, ibuprofen, sulfamethoxazole and acetochlor reaching 92.5%, 98.4%, 97.5%, 100% and 100% respectively. This result fully demonstrates the 222 / The sodium hypochlorite system has a strong universal degradation ability and high efficiency for different types of organic pollutants, so it has broad practical application prospects and is expected to become a powerful supplement and alternative to traditional water treatment technology, opening up a new path for the development of the water treatment field.

[0092] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A method for removing new pollutants from water using a far ultraviolet-assisted sodium hypochlorite system, characterized in that: The steps include: S1, adjusting the pH of the aqueous solution to be treated containing new pollutants to 4-10; S2, adding sodium hypochlorite oxidant to the aqueous solution to be treated and stirring continuously; S3, reacts at an ultraviolet wavelength of 200-230nm.

2. The method for removing new pollutants from water using a far ultraviolet-assisted sodium hypochlorite system according to claim 1, characterized in that: In step S1, the molar concentration of the new pollutant in the aqueous solution to be treated is 5-15 mM.

3. The method for removing new pollutants from water using a far ultraviolet-assisted sodium hypochlorite system according to claim 1, characterized in that: In step S1, the new pollutant is selected from at least one of carbamazepine, iohexol, sulfamethoxazole, acetochlor or ibuprofen.

4. The method for removing new pollutants from water using a far ultraviolet-assisted sodium hypochlorite system according to claim 1, characterized in that: In step S2, the molar concentration of the sodium hypochlorite oxidant in the aqueous solution to be treated is 50-400 μM.

5. The method for removing new pollutants from water using a far ultraviolet-assisted sodium hypochlorite system according to claim 1, characterized in that: In step S2, the stirring speed is 300-500 rpm.

6. The method for removing new pollutants from water using a far ultraviolet-assisted sodium hypochlorite system according to claim 1, characterized in that: In step S3, the ultraviolet wavelength is 221-223 nm.

7. The method for removing new pollutants from water using a far ultraviolet-assisted sodium hypochlorite system according to claim 1, characterized in that: In step S3, the reaction is carried out in a Far-UVC irradiation device.

8. The method for removing new pollutants from water using a far ultraviolet-assisted sodium hypochlorite system according to claim 1, characterized in that: In step S3, the reaction is carried out at room temperature in the dark.

9. The method for removing new pollutants from water using a far ultraviolet-assisted sodium hypochlorite system according to claim 1, characterized in that: In step S3, the reaction time is 2-60 min.

10. Use of the method for removing new pollutants in water using a far ultraviolet-assisted sodium hypochlorite system as claimed in any one of claims 1 to 9 in water treatment.

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