A method for strengthening organic pollutants in high-salinity wastewater by electron beam irradiation treatment of magnesium-aluminum spinel

Abstract

The application provides a method for strengthening organic pollutants in high-salt wastewater by electron beam irradiation treatment of magnesium-aluminum spinel, which comprises adding magnesium-aluminum spinel into the high-salt wastewater and then performing electron beam irradiation treatment on the mixed system. Under the action of electron beam irradiation, oxidative active species such as hydrated electrons and hydroxyl radicals are generated in the high-salt wastewater. The magnesium-aluminum spinel can absorb and transfer the hydrated electrons, so as to reduce the quenching effect between the hydrated electrons and the oxidative active species and improve the concentration of the effective active species in the system. Meanwhile, the magnesium-aluminum spinel can adsorb part of the salt substances in the wastewater, so as to reduce the influence of the salt substances on the removal of the organic pollutants by the hydroxyl radicals. In addition, under the irradiation action, the magnesium-aluminum spinel will dissolve out a certain amount of aluminum ions, and the aluminum ions will form Al(OH)3 colloid in the irradiation process, so as to enhance the removal of the organic pollutants in the wastewater. Finally, the interaction among the magnesium-aluminum spinel, the salt and the electron beam irradiation is utilized to enhance the removal effect of the organic pollutants in the high-salt wastewater.

Description

Technical Field

[0001] This invention relates to the field of environmental engineering technology, and in particular to a method for treating organic pollutants in high-salt wastewater by magnesium aluminum spinel-enhanced electron beam irradiation. Background Technology

[0002] With increasing demands for industrial wastewater recycling, zero discharge and water reuse have become essential requirements for sustainable industrial development and green transformation. Effective treatment of high-salinity wastewater is a crucial issue that must be addressed to achieve zero discharge in industrial wastewater treatment. Currently, commonly used zero-discharge treatment processes for high-salinity wastewater mainly include pretreatment, volume reduction, and evaporation crystallization. The pretreatment unit removes hardness and organic pollutants from the water, reducing the load on the volume reduction process. Key pretreatment technologies include filtration and ozone oxidation. The volume reduction unit concentrates the high-salinity wastewater, reducing the processing volume of subsequent treatment units; membrane separation is a commonly used volume reduction technology. The evaporation crystallization unit treats the large volume of high-salinity wastewater generated in the volume reduction unit; commonly used evaporation crystallization methods include thermal and membrane methods. However, due to the high salt content and complex composition of high-salinity wastewater, the above wastewater treatment processes still struggle to achieve the ideal "zero discharge" treatment effect.

[0003] Electron beam irradiation is an emerging advanced oxidation technology. The principle of electron beam irradiation for wastewater treatment includes direct and indirect effects. Direct effect refers to the high energy of the electron beam directly depositing organic pollutants in the water, causing their decomposition and mineralization. Indirect effect refers to the electron beam exciting water decomposition to generate reactive species. These reactive species react with organic pollutants in the water, achieving the purpose of removing organic pollutants. Unlike catalytic ozone oxidation, electron beam irradiation not only generates oxidizing reactive species such as hydroxyl radicals but also reducing reactive species such as hydrated electrons. In addition to reacting with organic pollutants, these reactive species can also undergo mutual quenching reactions, leading to a decrease in the effective concentration of reactive species for degrading organic pollutants in the water.

[0004] Electron beam irradiation technology has been applied to the treatment of industrial wastewater, such as dyeing and printing wastewater, pharmaceutical wastewater, and coking wastewater. Over long-term operation, it has demonstrated good treatment effects and reduced treatment costs, showing broad application prospects in the wastewater treatment field. However, because high salt content inhibits the oxidative properties of hydroxyl radicals generated during the irradiation process, electron beam irradiation treatment of high-salt wastewater also faces the problem of high-salt quenching of oxidizing reactive species.

[0005] Therefore, reducing the impact of high salinity on irradiated wastewater and increasing the concentration of effective active species during irradiation are key factors in whether electron beam irradiation technology can be used for practical high-salinity wastewater treatment. Summary of the Invention

[0006] To address the aforementioned problems in the existing technology, this invention provides a method for treating organic pollutants in high-salt wastewater using magnesium aluminum spinel-enhanced electron beam irradiation, thereby enhancing the ability of electron beam irradiation to remove organic pollutants from high-salt wastewater.

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

[0008] This invention provides a method for treating organic pollutants in high-salt wastewater by magnesium aluminum spinel-reinforced electron beam irradiation, characterized in that the method comprises:

[0009] Magnesium aluminum spinel was added to the high-salt wastewater and stirred until a mixed solution was formed;

[0010] The mixed solution is irradiated to decompose the organic pollutants in the high-salt wastewater;

[0011] The salinity content of the high-salinity wastewater is ≤7%.

[0012] The irradiation dose of the electron beam is 5~100 kGy;

[0013] The dosage of the magnesium aluminum spinel is 1~40 g / L.

[0014] Optionally, when the mixed solution is irradiated, hydrated electrons and oxidizing active species, including hydroxyl radicals, are generated in the high-salt wastewater under the electron beam irradiation. The magnesium aluminum spinel is used to absorb and transfer the hydrated electrons, reducing the quenching effect between the hydrated electrons and the oxidizing active species.

[0015] Optionally, when the mixed solution is irradiated, the magnesium aluminum spinel is used to adsorb some of the salt substances in the mixed solution.

[0016] Optionally, when the mixed solution is irradiated, the magnesium aluminum spinel dissolves some aluminum ions and forms Al(OH)3 colloid under irradiation. The Al(OH)3 colloid is used to remove organic pollutants in the mixed solution.

[0017] Optionally, when the irradiation dose is 5~50 kGy, the dosage of the magnesium aluminum spinel is 1~10 g / L.

[0018] Optionally, when the irradiation dose is 50~100 kGy, the dosage of the magnesium aluminum spinel is 10~40 g / L.

[0019] Optionally, the COD of the high-salinity wastewater is ≤500 mg / L.

[0020] Optionally, after irradiating the mixed solution, the mineralization rate of organic pollutants in the high-salt wastewater is not less than 50%.

[0021] Optionally, the irradiation source for the electron beam irradiation is an electron accelerator.

[0022] Optionally, magnesium aluminum spinel is added to high-salt wastewater containing benzoic acid, chloride ions, and sulfate ions, and stirred until a mixed solution is formed; after irradiation treatment of the mixed solution, the mineralization rate of the benzoic acid is 74.6%; wherein,

[0023] In the mixed solution, the initial concentration of benzoic acid is 50 mg / L, the concentrations of chloride ions and sulfate ions are both 10 g / L, the dosage of magnesium aluminum spinel is 10 g / L, and the irradiation dose of the electron beam is 50 kGy.

[0024] Optionally, magnesium aluminum spinel is added to the high-salt wastewater composed of coking wastewater RO membrane concentrate, and the mixture is stirred until homogeneous to form a mixed solution; after irradiation treatment of the mixed solution, the concentration of the organic pollutants is reduced to 73 mg / L; wherein,

[0025] In the mixed solution, the initial concentration of the organic pollutant is 297 mg / L, the salt content is 1.3%, the dosage of the magnesium aluminum spinel is 20 g / L, and the irradiation dose of the electron beam is 100 kGy.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] This invention provides a method for treating organic pollutants in high-salinity wastewater using magnesium aluminum spinel-enhanced electron beam irradiation, comprising: adding magnesium aluminum spinel to the high-salinity wastewater and stirring to form a mixed solution; subjecting the mixed solution to electron beam irradiation treatment to decompose the organic pollutants in the high-salinity wastewater; this invention enhances the removal of organic pollutants from high-salinity wastewater by adding magnesium aluminum spinel to the high-salinity wastewater and then subjecting the mixed system to electron beam irradiation treatment, thereby leveraging the interaction between magnesium aluminum spinel, salt, and electron beam irradiation; the interaction between magnesium aluminum spinel, salt, and electron beam irradiation is specifically manifested in the following three aspects:

[0028] 1) Under electron beam irradiation, hydrated electrons and oxidizing active species are generated in high-salt wastewater; magnesium aluminum spinel can absorb and transfer the hydrated electrons, which can reduce the quenching effect between hydrated electrons and oxidizing active species and increase the concentration of effective active species in the system.

[0029] 2) Magnesium aluminum spinel can adsorb some salts in wastewater, reducing the impact of salts on the removal of organic pollutants by hydroxyl radicals;

[0030] 3) Under irradiation, magnesium aluminum spinel will dissolve a certain amount of aluminum ions. These aluminum ions will form Al(OH)3 colloids during the irradiation process, which will enhance the removal of organic pollutants from wastewater. Attached Figure Description

[0031] 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.

[0032] Figure 1 A flowchart of a method for treating organic pollutants in high-salt wastewater by magnesium aluminum spinel-enhanced electron beam irradiation according to an embodiment of the present invention is shown.

[0033] Figure 2 This invention provides a comparative diagram showing the removal effects of different treatment processes for organic pollutants in high-salt wastewater according to Embodiment 1 of the present invention.

[0034] Figure 3 This invention provides a comparative diagram showing the removal effects of different treatment processes for organic pollutants in high-salt wastewater according to Embodiment 2 of the present invention.

[0035] Figure 4 This invention provides a comparative diagram showing the removal effects of different treatment processes on organic pollutants in high-salt wastewater according to Embodiment 3 of the present invention.

[0036] Figure 5 This invention provides a comparative diagram showing the removal effects of different treatment processes for organic pollutants in high-salt wastewater according to Embodiment 4 of the present invention.

[0037] Figure 6 The diagram shows a comparison of the removal effects of different treatment processes provided in Embodiment 5 of the present invention on the treatment of organic pollutants in RO membrane concentrate of coking wastewater. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] When treating organic matter in wastewater using electron beam irradiation, the electron beam irradiation induces water decomposition, generating reactive species (hydrated electrons (electrons)). aq - While electron beam irradiation (EPI) produces hydroxyl radicals (HO•), these reactive species not only react with organic pollutants in water but also quench each other, leading to a decrease in the effective concentration of reactive species for degrading organic pollutants. Simultaneously, high-salt components react with hydroxyl radicals, inhibiting the reaction between organic pollutants and hydroxyl radicals in the wastewater, resulting in reduced treatment efficiency. These factors limit the application of EPI in the treatment of high-salt organic wastewater.

[0044] Based on this, the present invention provides a method for treating organic pollutants in high-salinity wastewater using magnesium aluminum spinel-enhanced electron beam irradiation. This method involves adding magnesium aluminum spinel to the high-salinity wastewater and then subjecting the mixed system to electron beam irradiation. The interaction between the magnesium aluminum spinel, salt, and electron beam irradiation enhances the removal of organic pollutants from the high-salinity wastewater. Compared to methods using single electron beam irradiation to treat organic pollutants in high-salinity wastewater, the magnesium aluminum spinel-enhanced electron beam irradiation method provided by the present invention significantly improves the removal efficiency of organic matter. Specific implementation details are as follows:

[0045] This invention provides a method for treating organic pollutants in high-salt wastewater by magnesium aluminum spinel-reinforced electron beam irradiation, characterized in that the method comprises:

[0046] S1. Add magnesium aluminum spinel to the high-salt wastewater and stir until a mixed solution is formed;

[0047] S2. Irradiate the mixed solution to decompose the organic pollutants in the high-salt wastewater.

[0048] This invention is applicable to salinity content ≤7% (mass fraction) and COD ≤500. This invention addresses the removal of organic pollutants from high-salinity wastewater with a concentration of mg / L by electron beam irradiation. In this embodiment, magnesium aluminum spinel is added to the high-salinity wastewater, followed by electron beam irradiation of the mixture. This enhances the removal of organic pollutants from the wastewater through the interaction between magnesium aluminum spinel, salt, and electron beam irradiation. The interaction between magnesium aluminum spinel, salt, and electron beam irradiation manifests in three aspects: 1) Under electron beam irradiation, hydrated electrons and oxidizing reactive species, including hydroxyl radicals, are generated in the high-salinity wastewater. Magnesium aluminum spinel can absorb and transfer these hydrated electrons, reducing the quenching effect between hydrated electrons and oxidizing reactive species, thus increasing the concentration of effective reactive species in the system; 2) Magnesium aluminum spinel can adsorb some salts in the wastewater, reducing the impact of salts on the removal of organic pollutants by hydroxyl radicals; 3) Under irradiation, magnesium aluminum spinel dissolves a certain amount of aluminum ions, which form Al(OH)3 colloids during irradiation, enhancing the removal of organic pollutants from the wastewater. Ultimately, the mineralization rate of organic pollutants in high-salinity wastewater is no less than 50%. Compared with the method of treating organic pollutants in high-salinity wastewater by single electron beam irradiation (mineralization rate no higher than 30%), the method of treating organic pollutants in high-salinity wastewater by magnesium aluminum spinel-enhanced electron beam irradiation provided by this invention significantly improves the removal effect of organic matter.

[0049] In some embodiments, the electron beam irradiation dose is 5–100 kGy; the dosage of magnesium aluminum spinel is 1–40 g / L. The dosage of magnesium aluminum spinel is positively correlated with the electron beam irradiation dose; when the irradiation dose is 5–50 kGy, the dosage of magnesium aluminum spinel is 1–10 g / L. When the irradiation dose is 50–100 kGy, the dosage of magnesium aluminum spinel is 10–40 g / L.

[0050] To enable those skilled in the art to more clearly understand the present invention, the following embodiments will be used to describe in detail the method for treating organic pollutants in high-salt wastewater by magnesium aluminum spinel-enhanced electron beam irradiation.

[0051] Example 1:

[0052] High-salinity wastewater was artificially prepared with a phenol concentration of 50 mg / L and a chloride ion concentration of 5 g / L. Magnesium aluminum spinel (2 g / L) was added to the high-salinity wastewater and stirred to form a mixed solution. The mixed solution was then subjected to electron beam irradiation treatment at a dose of 10 kGy to investigate the decomposition of organic pollutants in the high-salinity wastewater by electron beam irradiation coupled with magnesium aluminum spinel.

[0053] As a control, equal volumes of the above-mentioned high-salinity wastewater were subjected to electron beam irradiation (10 kGy), magnesium aluminum spinel (2 g / L), and ozone catalytic oxidation (30 min) to decompose the organic pollutants in the high-salinity wastewater; the results are as follows. Figure 2 As shown:

[0054] Figure 2 The diagram shows a comparison of the removal effects of different treatment processes for organic pollutants in high-salinity wastewater provided in Embodiment 1 of the present invention. Figure 2 As shown, the mineralization rate of phenol reached 67.2% after treatment with magnesium aluminum spinel coupled with electron beam irradiation, which is significantly higher than other treatment methods, proving that magnesium aluminum spinel coupled with electron beam irradiation can effectively treat organic pollutants in high-salt wastewater.

[0055] Example 2:

[0056] High-salinity wastewater was artificially prepared with a phenol concentration of 50 mg / L and a sulfate ion concentration of 5 g / L. Magnesium aluminum spinel (2 g / L) was added to the high-salinity wastewater and stirred to form a mixed solution. The mixed solution was then subjected to electron beam irradiation treatment at a dose of 10 kGy to investigate the decomposition of organic pollutants in the high-salinity wastewater by electron beam irradiation coupled with magnesium aluminum spinel.

[0057] As a control, equal volumes of the above-mentioned high-salinity wastewater were subjected to electron beam irradiation (10 kGy), magnesium aluminum spinel (2 g / L), and ozone catalytic oxidation (30 min) to decompose the organic pollutants in the high-salinity wastewater; the results are as follows. Figure 3 As shown:

[0058] Figure 3 The diagram shows a comparison of the removal effects of different treatment processes for organic pollutants in high-salinity wastewater provided in Embodiment 2 of the present invention; for example... Figure 3 As shown, the mineralization rate of phenol reached 52.5% after treatment with magnesium aluminum spinel coupled with electron beam irradiation, which is significantly higher than other treatment methods, proving that magnesium aluminum spinel coupled with electron beam irradiation can effectively treat organic pollutants in high-salt wastewater.

[0059] Example 3:

[0060] High-salinity wastewater was artificially prepared, with benzoic acid concentration of 50 mg / L and chloride and sulfate ion concentrations of 10 g / L. Magnesium aluminum spinel (10 g / L) was added to the high-salinity wastewater and stirred to form a mixed solution. The mixed solution was then subjected to electron beam irradiation treatment at a dose of 50 kGy to investigate the decomposition of organic pollutants in the high-salinity wastewater by magnesium aluminum spinel coupled with electron beam irradiation.

[0061] As a control, equal volumes of the above-mentioned high-salinity wastewater were subjected to electron beam irradiation (50 kGy), magnesium aluminum spinel (10 g / L), and ozone catalytic oxidation (30 min) to decompose the organic pollutants in the high-salinity wastewater; the results are as follows. Figure 4 As shown:

[0062] Figure 4 The diagram shows a comparison of the removal effects of different treatment processes for organic pollutants in high-salinity wastewater provided in Embodiment 3 of the present invention. Figure 4 As shown, the magnesium-aluminum spinel coupled electron beam irradiation technology achieved a mineralization rate of 74.6% for benzoic acid in high-salt wastewater, which is far higher than other treatment technologies.

[0063] Example 4:

[0064] High-salinity wastewater was artificially prepared, with sulfamethoxazole concentration of 50 mg / L and chloride and sulfate ion concentrations of 5 g / L. Magnesium aluminum spinel (5 g / L) was added to the high-salinity wastewater and stirred to form a mixed solution. The mixed solution was then subjected to electron beam irradiation treatment at a dose of 20 kGy to investigate the decomposition of organic pollutants in the high-salinity wastewater by electron beam irradiation coupled with magnesium aluminum spinel.

[0065] As a control, equal volumes of the above-mentioned high-salinity wastewater were subjected to electron beam irradiation (20 kGy), magnesium aluminum spinel (5 g / L), and ozone catalytic oxidation (30 min) to decompose the organic pollutants in the high-salinity wastewater; the results are as follows. Figure 5 As shown:

[0066] Figure 5 The diagram shows a comparison of the removal effects of different treatment processes for organic pollutants in high-salinity wastewater provided in Embodiment 4 of the present invention. Figure 5 As shown, the magnesium-aluminum spinel coupled electron beam irradiation technology achieved a mineralization rate of 64.7% for benzoic acid in high-salt wastewater, which is far higher than other treatment technologies.

[0067] Example 5:

[0068] An actual coking wastewater RO membrane concentrate with a salt content of 1.3% (mass fraction) and a COD concentration of 297 mg / L was taken. 20 g / L of magnesium aluminum spinel was added to the RO membrane concentrate, and the solution was irradiated with 100 kGy. After treatment, the COD concentration decreased to 73 mg / L, to investigate the decomposition of organic pollutants in the coking wastewater RO membrane concentrate by magnesium aluminum spinel coupled with electron beam irradiation.

[0069] As a control, three equal volumes of the above-mentioned high-salinity wastewater were subjected to electron beam irradiation (100 kGy), magnesium aluminum spinel (20 g / L), and ozone catalytic oxidation (30 min) treatments, respectively, to decompose the organic pollutants in the high-salinity wastewater. After treatment, the COD concentrations decreased to 238, 229, and 177 mg / L, respectively. The comparative results are as follows: Figure 6 As shown:

[0070] Figure 6 The figure shows a comparison of the removal effects of different treatment processes provided in Embodiment 5 of the present invention on the treatment of organic pollutants in RO membrane concentrate of coking wastewater. Figure 6 As shown in the figure, the comparison reveals that magnesium aluminum spinel can effectively enhance the removal of organic pollutants from high-salt wastewater by electron beam irradiation.

[0071] 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.

[0072] 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.

[0073] The above provides a detailed description of a method for treating organic pollutants in high-salt wastewater using magnesium aluminum spinel-reinforced electron beam irradiation, as provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for treating organic pollutants in high-salinity wastewater by magnesium aluminum spinel-reinforced electron beam irradiation, characterized in that, The method includes: Magnesium aluminum spinel was added to the high-salt wastewater and stirred until a mixed solution was formed; The mixed solution is irradiated to decompose the organic pollutants in the high-salinity wastewater; wherein, The salinity content of the high-salinity wastewater is ≤7%; The irradiation dose of the electron beam is 5~100 kGy; The dosage of the magnesium aluminum spinel is 1~40 g / L.

2. The method for treating organic pollutants in high-salinity wastewater by magnesium aluminum spinel-enhanced electron beam irradiation according to claim 1, characterized in that, When the mixed solution is irradiated, hydrated electrons and oxidizing active species, including hydroxyl radicals, are generated in the high-salt wastewater under the irradiation of the electron beam; the magnesium aluminum spinel is used to absorb and transfer the hydrated electrons, reducing the quenching effect between the hydrated electrons and the oxidizing active species.

3. The method for treating organic pollutants in high-salinity wastewater by magnesium aluminum spinel-enhanced electron beam irradiation according to claim 1, characterized in that, When the mixed solution is irradiated, the magnesium aluminum spinel is used to adsorb some of the salt substances in the mixed solution.

4. The method for treating organic pollutants in high-salinity wastewater by magnesium aluminum spinel-enhanced electron beam irradiation according to claim 1, characterized in that, When the mixed solution is irradiated, the magnesium aluminum spinel dissolves some aluminum ions and forms Al(OH)3 colloid under irradiation. The Al(OH)3 colloid is used to remove organic pollutants from the mixed solution.

5. The method for treating organic pollutants in high-salinity wastewater by magnesium aluminum spinel-enhanced electron beam irradiation according to claim 1, characterized in that, When the irradiation dose is 5~50 kGy, the dosage of magnesium aluminum spinel is 1~10 g / L.

6. The method for treating organic pollutants in high-salinity wastewater by magnesium aluminum spinel-enhanced electron beam irradiation according to claim 1, characterized in that, When the irradiation dose is 50~100 kGy, the dosage of magnesium aluminum spinel is 10~40 g / L.

7. The method for treating organic pollutants in high-salinity wastewater by magnesium aluminum spinel-enhanced electron beam irradiation according to claim 1, characterized in that, The COD of the high-salinity wastewater is ≤500 mg / L.

8. The method for treating organic pollutants in high-salinity wastewater by magnesium aluminum spinel-enhanced electron beam irradiation according to claim 1, characterized in that, The irradiation source for the electron beam irradiation is an electron accelerator.

9. The method for treating organic pollutants in high-salinity wastewater by magnesium aluminum spinel-enhanced electron beam irradiation according to claim 1, characterized in that, Magnesium aluminum spinel was added to high-salt wastewater containing benzoic acid, chloride ions, and sulfate ions, and the mixture was stirred until homogeneous to form a mixed solution. After irradiation treatment of the mixed solution, the mineralization rate of the benzoic acid was 74.6%. In the mixed solution, the initial concentration of benzoic acid is 50 mg / L, the concentrations of chloride ions and sulfate ions are both 10 g / L, the dosage of magnesium aluminum spinel is 10 g / L, and the irradiation dose of the electron beam is 50 kGy.

10. The method for treating organic pollutants in high-salinity wastewater by magnesium aluminum spinel-reinforced electron beam irradiation according to claim 1, characterized in that, Magnesium aluminum spinel was added to high-salt wastewater composed of RO membrane concentrate from coking wastewater, and the mixture was stirred until homogeneous to form a mixed solution. After irradiation treatment of the mixed solution, the concentration of the organic pollutants decreased to 73 mg / L; wherein, In the mixed solution, the initial concentration of the organic pollutant is 297 mg / L, the salt content is 1.3%, the dosage of the magnesium aluminum spinel is 20 g / L, and the irradiation dose of the electron beam is 100 kGy.

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