A method for enhanced removal of halogenated organic pollutants from high-salinity wastewater

Abstract

This invention provides a method for enhanced removal of halogenated organic pollutants from high-salinity wastewater. When electron beam irradiation is applied to high-salinity wastewater, on the one hand, electron beam irradiation can ionize water molecules to generate hydrated electrons and hydroxyl radicals; on the other hand, electron beam irradiation can directly convert salts in the wastewater into hydrated electrons and oxidizing radicals. Because electron beam irradiation directly converts salts into hydrated electrons and oxidizing radicals, it reduces the quenching effect of salts on hydroxyl radicals in the water, allowing more hydroxyl radicals in the solution to react with organic pollutants, thus enhancing the mineralization of organic pollutants. Simultaneously, the hydrated electrons generated by electron beam irradiation from the conversion of salts increase the concentration of reducing species in the system, leading to rapid dehalogenation of halogenated organic pollutants. Meanwhile, the hydroxyl radicals and oxidizing radicals directly formed from salts react with the dehalogenated organic pollutants, causing them to be completely decomposed and thoroughly removed from the high-salinity wastewater.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a method for enhancing the removal of halogenated organic pollutants from high-salinity wastewater. Background Technology

[0002] Industrial production processes generate large amounts of high-salinity wastewater, especially in the coal chemical industry. To meet the development needs of the modern coal chemical industry, "zero discharge" of wastewater has gradually become a requirement. "Zero discharge" processes typically include pretreatment, biochemical treatment, advanced treatment, membrane treatment, salt separation, and concentration / crystallization. Membrane treatment usually employs a dual-membrane process of ultrafiltration and reverse osmosis. The effluent from the dual-membrane process can be directly used for production water or as makeup water for circulating cooling water systems. However, the reverse osmosis process simultaneously produces concentrated wastewater containing a large amount of inorganic salts, i.e., high-salinity wastewater. The removal of organic pollutants from high-salinity wastewater directly affects the quality of salt separation. How to effectively remove organic pollutants from high-salinity wastewater is a pressing problem to be solved in the field of industrial wastewater treatment.

[0003] Currently, common methods for treating high-salinity wastewater include physical, chemical, and biological methods. Physical methods typically refer to adsorption, which removes organic pollutants from high-salinity wastewater by adding adsorbents such as activated carbon. However, this method has low removal efficiency, and the adsorbent requires further treatment after saturation. Biological methods usually employ salt-tolerant microorganisms, but when the concentration of organic pollutants in high-salinity wastewater decreases to a certain level, the bioavailability of organic pollutants decreases, making complete removal impossible. Chemical methods typically refer to advanced oxidation processes, commonly including Fenton oxidation and ozone oxidation. The Fenton process is simple to operate, but requires acid and alkali adjustments, and the reaction of salt with the hydroxyl radicals generated in the Fenton process significantly inhibits its effectiveness. To ensure effectiveness, large amounts of ferrous iron and hydrogen peroxide need to be added, leading to the formation of large amounts of iron sludge. The separation and treatment of this iron sludge is also a major challenge. Ozone oxidation does not require the addition of chemical reagents, but its low ozone utilization rate and the inhibitory effect of high salt result in low treatment efficiency.

[0004] Electron beam irradiation is a novel advanced oxidation technology. Compared with conventional advanced oxidation technologies, electron beam irradiation offers advantages such as high treatment capacity, high efficiency, and the elimination of the need for chemical additives. The principle of electron beam irradiation wastewater treatment involves both the direct action of the high-energy electron beam (energy deposition) and the indirect action of exciting water molecules to generate active particles. Unlike traditional advanced oxidation technologies, electron beam irradiation can simultaneously generate both reducing active particles (such as hydrated electrons) and oxidizing active particles (such as hydroxyl radicals). By fully utilizing the roles of both reducing and oxidizing active particles during electron beam irradiation, the wastewater treatment capacity of electron beam irradiation can be significantly improved.

[0005] However, electron beam irradiation cannot be directly used to reduce organic pollutants in high-salinity wastewater because the high salt content inhibits the oxidizing properties of hydroxyl radicals. Currently, there is no research on the direct application of electron beam irradiation technology for removing organic pollutants from high-salinity wastewater. Summary of the Invention

[0006] Halogenated organic compounds are common organic pollutants in wastewater, and are frequently found in high-salinity wastewater. This invention innovatively proposes a method for enhanced removal of halogenated organic pollutants from high-salinity wastewater, taking advantage of the characteristics of both halogenated organic pollutants and electron beam irradiation technology. This technology fully combines the characteristics of halogenated organic compounds, electron beam irradiation, and high-salinity wastewater, requiring no chemical additives, exhibiting good treatment effect and high efficiency, and showing broad application prospects in the field of high-salinity wastewater treatment.

[0007] The specific details of the invention are as follows:

[0008] In a first aspect, the present invention provides a method for enhanced removal of halogenated organic pollutants from high-salinity wastewater, the method comprising:

[0009] The high-salinity wastewater is subjected to electron beam irradiation treatment, during which the halogenated organic pollutants in the high-salinity wastewater undergo dehalogenation and are decomposed and removed.

[0010] The electron beam irradiation dose of the irradiation treatment is determined by the conductivity of the high-salinity wastewater and the concentration of the halogenated organic pollutants. The absolute ratio of the conductivity (ms / cm) of the high-salinity wastewater to the electron beam irradiation dose (kGy) is between 1 and 20, and the absolute ratio of the electron beam irradiation dose to the concentration of the halogenated organic pollutants is greater than 0.1.

[0011] Optionally, the halogenated organic pollutants in the high-salinity wastewater undergo dehalogenation and are decomposed and removed during irradiation, including:

[0012] The water molecules in the high-salinity wastewater react with the electron beam irradiation to generate hydrated electrons (electrons). aq - ) and hydroxyl radicals (HO·);

[0013] The salts in the high-salinity wastewater react with electron beam irradiation to produce hydrated electrons (electrons). aq - and corresponding oxidizing free radicals;

[0014] The hydrated electrons (e aq - () Acts on the halogenated organic pollutants to dehalogenate them;

[0015] The dehalogenated organic pollutants are completely decomposed into carbon dioxide and water under the combined action of the hydroxyl radical (HO·) and the oxidizing radical.

[0016] Optionally, the corresponding oxidizing free radical includes O2· - Cl· SO4 - ·and NO3·.

[0017] Optionally, the method further includes introducing air into the high-salinity wastewater before subjecting it to electron beam irradiation treatment.

[0018] Optionally, the method further includes introducing air into the high-salinity wastewater during the electron beam irradiation treatment of the high-salinity wastewater.

[0019] Optionally, the halogenated organic pollutants in the high-salinity wastewater undergo dehalogenation and are decomposed and removed during irradiation, including:

[0020] The water molecules in the high-salinity wastewater react with the electron beam irradiation to generate hydrated electrons (electrons). aq - ) and hydroxyl radicals (HO·);

[0021] The salts in the high-salinity wastewater react with electron beam irradiation to produce hydrated electrons (electrons). aq - and oxidizing free radicals;

[0022] A portion of the hydrated electrons (e aq - () Acts on the halogenated organic pollutants to dehalogenate them;

[0023] The other part of the hydrated electrons (e aq - It reacts with oxygen entering the high-salinity wastewater to form oxidizing free radicals (O2·). - );

[0024] The dehalogenated organic pollutants are completely decomposed under the combined action of the hydroxyl radical (HO·) and the oxidizing radical.

[0025] Optionally, the ratio of the electrical conductivity of the high-salinity wastewater to the absolute value of the electron beam irradiation dose is between 1 and 2.

[0026] Optionally, the absolute ratio of the electron beam irradiation dose to the concentration of the halogenated organic pollutant is 0.5-2.

[0027] Optionally, electron beam irradiation is generated by a high-energy electron accelerator with an energy between 0.5 and 2 MeV.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] This invention provides a method for enhanced removal of halogenated organic pollutants from high-salinity wastewater. The method includes: treating the high-salinity wastewater with electron beam irradiation, wherein the halogenated organic pollutants in the wastewater undergo dehalogenation and are decomposed and removed during the electron beam irradiation process. The electron beam irradiation dose is determined by the conductivity of the high-salinity wastewater and the concentration of the halogenated organic pollutants. The ratio of the absolute value of the conductivity of the high-salinity wastewater to the absolute value of the electron beam irradiation dose is between 1 and 20, and the ratio of the absolute value of the electron beam irradiation dose to the absolute value of the concentration of the halogenated organic pollutants is greater than 0.1. This invention uses electron beam irradiation to directly act on the high-salinity wastewater. When electron beam irradiation acts on the high-salinity wastewater, on the one hand, electron beam irradiation can ionize water molecules to generate hydrated electrons (electrons). aq - On the one hand, electron beam irradiation can directly convert salts in wastewater into hydrated electrons (e.g., hydroxyl radicals (HO·) and hydroxyl radicals (HO·). aq - ) and corresponding oxidizing free radicals. Because electron beam irradiation directly converts salts into hydrated electrons (e... aq - The electron beam irradiation process reduces the quenching effect of salts on hydroxyl radicals in water, allowing more hydroxyl radicals in the solution to react with organic pollutants. Simultaneously, the generated oxidative radicals can mineralize organic pollutants, thus enhancing their mineralization. Furthermore, the hydrated electrons (electrons) produced by the conversion of salts during electron beam irradiation... aq - This increases the concentration of reducing species in the system. Hydrated electrons (e aq - This can rapidly dehalogenate halogenated organic pollutants, while oxidizing free radicals in the system, such as hydroxyl radicals (HO·) and superoxide radicals (O2·), can be eliminated. - These substances can react with the dehalogenated organic pollutants, causing them to decompose into carbon dioxide and water, ultimately leading to their complete removal from high-salinity wastewater. This method is simple and fully utilizes the characteristics of halogenated organic compounds, high-salinity wastewater, and electron beam irradiation to form a multi-active species composite system. It offers advantages such as good treatment effect, short treatment time, wide pH range applicability, and low treatment cost for halogenated organic compounds in high-salinity wastewater, and has broad application prospects. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 The graph shows the relationship between the removal rate of 4-chlorophenol and chloride ion concentration in high-salt wastewater.

[0032] Figure 2 The graph shows the relationship between the removal rate of 4-chlorophenol and the concentration of sulfate ions in high-salt wastewater.

[0033] Figure 3 The graph shows the relationship between the removal rate of 4-chlorophenol and the concentration of nitrate ions in high-salt wastewater.

[0034] Figure 4 The graph shows the relationship between electron beam irradiation dosing and the mineralization rate of 4-chlorophenol in high-salt wastewater;

[0035] Figure 5 The graph shows the relationship between electron beam irradiation dosing and the removal rate and mineralization rate of 4-chlorophenol in high-salt wastewater. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, any product that is the same as or similar to the present invention, derived by any person under the guidance of the present invention or by combining the features of the present invention with other prior art, falls within the protection scope of the present invention. Furthermore, all other embodiments obtained by those skilled in the art without inventive effort are within the protection scope of the present invention.

[0037] Specific experimental steps or conditions are not specified in the embodiments; they can be performed according to the conventional experimental steps or conditions described in the prior art. Reagents and other instruments used, unless otherwise specified, are all commercially available conventional reagent products. Furthermore, the accompanying drawings are merely illustrative diagrams of the embodiments of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore, repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0038] Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of this specification.

[0039] In the description of this invention, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0040] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] This invention provides a method for enhanced removal of halogenated organic pollutants from high-salinity wastewater. The invention will be further illustrated below with reference to specific examples.

[0042] It should be noted that the conductivity of the high-salinity wastewater involved in this invention is measured in units of (ms / cm); and the electron beam irradiation dose is measured in units of (kGy).

[0043] Firstly, this invention provides a method for enhanced removal of halogenated organic pollutants from high-salinity wastewater. Specifically, this method involves directly subjecting the high-salinity wastewater containing halogenated organic pollutants to electron beam irradiation without any pretreatment. Electron beam irradiation can ionize water molecules to generate hydrated electrons (electrons). aq - On the one hand, electron beam irradiation can directly convert salts in wastewater into hydrated electrons (e.g., hydroxyl radicals (HO·) and hydroxyl radicals (HO·). aq - ) and corresponding oxidizing free radicals. Because electron beam irradiation directly converts salts into hydrated electrons (e... aq - The electron beam irradiation process reduces the quenching effect of salts on hydroxyl radicals in water, allowing more hydroxyl radicals in the solution to react with organic pollutants. Simultaneously, the generated oxidizing free radicals can also mineralize organic pollutants, thus enhancing their mineralization. Furthermore, the hydrated electrons (electrons) produced by the conversion of salts during electron beam irradiation... aq - This increases the concentration of reducing species in the system. Hydrated electrons (e aq - This can rapidly dehalogenate halogenated organic pollutants, while the corresponding oxidizing free radicals in the system, such as hydroxyl radicals (HO·) and superoxide radicals (O2·), can also dehalogenate them. -Electron beam irradiation, etc., can react with the dehalogenated organic pollutants, decomposing them into carbon dioxide and water, ultimately removing them completely from the high-salinity wastewater. The selection of the electron beam irradiation dose is related to the conductivity of the high-salinity wastewater and the concentration of halogenated organic pollutants. The ratio of the absolute value of the conductivity of the high-salinity wastewater to the absolute value of the electron beam irradiation dose is between 1 and 20, and the ratio of the absolute value of the electron beam irradiation dose to the absolute value of the concentration of halogenated organic pollutants is greater than 0.1. The reaction equations for the decomposition of halogenated organic pollutants in high-salinity wastewater by direct irradiation are as follows:

[0044] H2O + electron beam irradiation → HO· + e aq - (1)

[0045] Cl - + Electron beam irradiation → Cl·+e aq - (2)

[0046] SO4 2- +Electron beam irradiation → SO4 - ·+e aq - (3)

[0047] NO3 - + Electron beam irradiation → NO3·+e aq - (4)

[0048] e aq - + O2→ O2 - · (5)

[0049] The salts in high-salinity wastewater react with electron beam irradiation to produce hydrated electrons (electrons). aq - ) and oxidizing free radicals, the corresponding oxidizing free radicals include Cl·, SO42- - NO3·, O2 - These corresponding oxidizing free radicals in hydrated electrons (e aq - This process acts on halogenated organic pollutants, causing them to dehalogenate. It then reacts with the dehalogenated organic pollutants, decomposing them into carbon dioxide and water, ultimately removing them completely from high-salinity wastewater. Furthermore, these free radicals are less inhibited by salt compared to hydroxyl radicals, and the dehalogenated organic pollutants react more readily with OH· and O2·. - Cl· SO4 - It is oxidized and decomposed into carbon dioxide and water under the action of NO3·.

[0050] In some embodiments, air is introduced into the high-salinity wastewater before electron beam irradiation treatment, or air can be continuously introduced during the electron beam irradiation process to increase the oxygen content in the wastewater. The oxygen entering the high-salinity wastewater can react with some of the hydrated electrons (e... aq - A reaction occurs, forming superoxide radicals (O2·) - (Refer to reaction equation 5) This can enhance the effect of free radicals on dehalogenated organic pollutants, causing them to decompose completely and be removed.

[0051] In some embodiments, the ratio of the electrical conductivity of the high-salinity wastewater to the absolute value of the electron beam irradiation dose is between 1 and 2, and the ratio of the electron beam irradiation dose to the absolute value of the concentration (mg / L) of the halogenated organic pollutants is greater than 0.5-2.

[0052] In some implementations, electron beam irradiation is generated by a high-energy electron accelerator with energies between 0.5 and 2 MeV.

[0053] To enable those skilled in the art to more clearly understand the present invention, the following embodiments will be used to provide a detailed description of a method for enhanced removal of halogenated organic pollutants from high-salinity wastewater.

[0054] Example 1

[0055] A high-salinity wastewater containing 4-chlorophenol was prepared, with a 4-chlorophenol concentration of 10 mg / L, a chloride ion concentration between 1 and 10 g / L, and a conductivity between 5 and 10 mS / cm. This wastewater was then treated with electron beam irradiation at a dose of 5 kGy. The removal rate of 4-chlorophenol from the treated wastewater was 100%.

[0056] Figure 1 The graph shows the relationship between the removal rate of 4-chlorophenol and chloride ion concentration in high-salt wastewater; for example... Figure 1 As shown, the mineralization rate of 4-chlorophenol increases with increasing chloride ion concentration. Water molecules in high-salinity wastewater react with electron beam irradiation to generate hydrated electrons (electrons). aq - ) and hydroxyl radicals (HO·), salts in high-salinity wastewater (Cl) - When exposed to electron beam irradiation, Cl... - + Electron beam irradiation → Cl·+e aq - The reaction, in which hydrated electrons (e aq - (Cl·) acts on halogenated organic pollutants, causing them to dehalogenate; furthermore, (Cl·) and hydroxyl radicals (HO·) continue to act on the dehalogenated halogenated organic pollutants, completely decomposing them into carbon dioxide and water.

[0057] Example 2

[0058] A high-salinity wastewater containing 4-chlorophenol was prepared, with a 4-chlorophenol concentration of 10 mg / L, a sulfate ion concentration between 1 and 10 g / L, and a conductivity between 5 and 10 mS / cm. This wastewater was then treated with electron beam irradiation at a dose of 5 kGy. After treatment, the 4-chlorophenol was completely removed from the wastewater.

[0059] Figure 2 The graph showing the relationship between the removal rate of 4-chlorophenol and sulfate ion concentration in high-salt wastewater is shown; Figure 2 As shown, the mineralization rate of 4-chlorophenol increases with increasing sulfate ion concentration. Water molecules in high-salinity wastewater react with electron beam irradiation to generate hydrated electrons (electrons). aq - ) and hydroxyl radicals (HO·), salts in high-salinity wastewater (SO4·) 2- SO42- is produced when SO42- is exposed to electron beam irradiation. 2- +Electron beam irradiation → SO4 - ·+e aq - The reaction, in which hydrated electrons (e aq - This process acts on halogenated organic pollutants, causing them to dehalogenate; furthermore, hydroxyl radicals (HO·) and SO42- react to dehalogenate the pollutants. - It continues to react with the dehalogenated organic pollutants after dehalogenation, completely decomposing them into carbon dioxide and water.

[0060] Example 3

[0061] A high-salt wastewater containing 4-chlorophenol was prepared, with a concentration of 10 mg / L of 4-chlorophenol, a nitrate ion concentration ranging from 0.1 to 1 g / L, and a conductivity ranging from 4 to 6 mS / cm. This wastewater was then treated with electron beam irradiation at a dose of 5 kGy. After treatment, 4-chlorophenol was completely removed from the wastewater.

[0062] Figure 3 The graph shows the relationship between the removal rate of 4-chlorophenol and the concentration of nitrate ions in high-salt wastewater; for example... Figure 3 As shown, the mineralization rate of 4-chlorophenol increases with increasing nitrate ion concentration. Water molecules in high-salinity wastewater react with electron beam irradiation to generate hydrated electrons (electrons). aq - ) and hydroxyl radicals (HO·), salts in high-salinity wastewater (NO3) - When exposed to electron beam irradiation, NO3 is produced. - + Electron beam irradiation → NO3·+e aq - The reaction, in which hydrated electrons (e aq- The free radicals act on halogenated organic pollutants, causing them to dehalogenate. Furthermore, hydroxyl radicals (HO·) and NO3· continue to act on the dehalogenated halogenated organic pollutants, completely decomposing them into carbon dioxide and water.

[0063] Example 4

[0064] A high-salt wastewater containing 4-chlorophenol was prepared, with a concentration of 10 mg / L of 4-chlorophenol, a sulfate ion concentration of 5 g / L, and a conductivity of 10 mS / cm. This wastewater was then treated with electron beam irradiation at doses of 1, 2, 5, and 10 kGy. After treatment, 4-chlorophenol was completely removed from the wastewater.

[0065] Figure 4 The graph shows the relationship between electron beam irradiation dosing and the mineralization rate of 4-chlorophenol in high-salinity wastewater; for example... Figure 4 As shown, the mineralization rate of 4-chlorophenol increases with increasing beam irradiation dose.

[0066] Example 5

[0067] Take 100 ml of actual high-salinity wastewater from a coal chemical plant and add a measured amount of 4-chlorophenol to achieve a concentration of 10 mg / L. The high-salinity wastewater has a pH of 6.4, a COD of 296 mg / L, a conductivity of 16.613 mS / cm, and a chloride ion concentration of 2084 mg / L. Treat this wastewater with electron beam irradiation at doses of 1, 2, 5, and 10 kGy.

[0068] Figure 5 The graph shows the relationship between electron beam irradiation dosing and the removal rate and mineralization rate of 4-chlorophenol in high-salt wastewater; for example... Figure 5 As shown, when the irradiation dose is 1 kGy, the removal rate of 4-chlorophenol is 89.2%, slightly lower than that in the prepared water. This is mainly because the actual high-salinity wastewater contains other organic matter, which consumes the active particles in the system. When the irradiation dose is 2, 5, and 10 kGy, the removal rate of 4-chlorophenol is 100%. The mineralization rate of the high-salinity wastewater increases with the increase of the irradiation dose, but is lower than that of 4-chlorophenol in the prepared water. The reason for this phenomenon is as described above. Although the removal rate of 4-chlorophenol in the prepared water is lower than that in the actual wastewater, it is higher than that in other commonly used water treatment processes, demonstrating that this method has certain advantages in treating halogenated organic pollutants in actual wastewater.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0070] For the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps can be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and components involved are not necessarily essential to the present invention.

[0071] The above provides a detailed description of a method for enhanced removal of halogenated organic pollutants from high-salt wastewater. Specific examples have been used to illustrate the principles and implementation methods of the invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the invention. At the same time, those skilled in the art will recognize that, based on the ideas of the invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the invention.

Claims

1. A method for enhanced removal of halogenated organic pollutants from high-salinity wastewater, characterized in that, The method includes: The high-salinity wastewater is subjected to electron beam irradiation treatment, during which the halogenated organic pollutants in the wastewater undergo dehalogenation and are decomposed and removed, including: The water molecules in the high-salt wastewater react with electron beam irradiation to generate hydrated electrons and hydroxyl radicals. The salts in the high-salinity wastewater react with electron beam irradiation to produce hydrated electrons and corresponding oxidizing free radicals. A portion of the hydrated electrons act on the halogenated organic pollutants, causing the halogenated organic pollutants to dehalogenate; Another portion of the hydrated electrons react with oxygen entering the high-salt wastewater to form oxidizing free radicals; The dehalogenated organic pollutants are completely decomposed into carbon dioxide and water under the combined action of the hydroxyl radicals and the oxidizing radicals. The electron beam irradiation dose of the irradiation treatment is determined by the conductivity of the high-salinity wastewater and the concentration of the halogenated organic pollutants. The ratio of the absolute value of the conductivity of the high-salinity wastewater to the absolute value of the electron beam irradiation dose is between 1 and 20, and the ratio of the absolute value of the electron beam irradiation dose to the absolute value of the concentration of the halogenated organic pollutants is greater than 0.

1. The electron beam irradiation is generated by a high-energy electron accelerator with an energy between 0.5 and 2 MeV. The method further includes: introducing air into the high-salinity wastewater before electron beam irradiation treatment; and introducing air into the high-salinity wastewater during electron beam irradiation treatment. The corresponding oxidizing free radicals include O2• - Cl•, SO4 - • and NO3•.

2. The method for enhanced removal of halogenated organic pollutants from high-salinity wastewater according to claim 1, characterized in that, The ratio of the electrical conductivity of the high-salinity wastewater to the absolute value of the electron beam irradiation dose is between 1 and 2.

3. The method for enhanced removal of halogenated organic pollutants from high-salinity wastewater according to claim 1, characterized in that, The absolute ratio of the electron beam irradiation dose to the concentration of the halogenated organic pollutant is 0.5-2.

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