High-salt organic wastewater treatment material and preparation method thereof

Abstract

The application belongs to the technical field of sewage treatment, and particularly relates to a high-salt organic wastewater treatment material and a preparation method thereof. The high-salt organic wastewater treatment material comprises component A, component B and component C. The component A is 2,6-pyridinedicarboxylic acid. The component B comprises modified starch, polyaluminum chloride and polyferric sulfate. The raw material composition and content of the component B are as follows: the modified starch is 40-60% by weight, the polyaluminum chloride is 20-40% by weight, and the polyferric sulfate is 10-20% by weight. The component C is a porous adsorption material. The material can not only significantly reduce the COD value of wastewater, but also effectively recycle the substances in the wastewater. Meanwhile, the method is simple, low in cost and less in environmental pollution.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and more specifically, relates to a high-salt organic wastewater treatment material and its preparation method. Background Technology

[0002] High-salinity organic wastewater refers to wastewater with a total salt content greater than 1%. It has a wide range of sources, large volumes, high concentrations of organic matter, high color, and high salt content, and is generated in large quantities in various industrial processes such as pharmaceuticals, chemicals, petroleum, and papermaking. The wastewater contains large amounts of organic matter and inorganic salts, posing a significant threat to the environment; direct discharge of high-salinity organic wastewater will cause severe pollution. During treatment, the wastewater can corrode pipes and reaction equipment; simultaneously, the high salt content leads to poor biodegradability, increasing treatment costs and resulting in unsatisfactory treatment outcomes. Therefore, optimizing the treatment technology for high-salinity organic wastewater is currently a hot topic in the industry.

[0003] Currently, the main treatment methods for high-salinity organic wastewater include biological methods, physicochemical methods, and chemical oxidation methods. Biological methods remove organic pollutants from wastewater by utilizing the adsorption and oxidative decomposition of microorganisms such as bacteria. This method is low-cost and has a good organic matter removal effect, but it has certain limitations in treating saline organic wastewater. This is mainly because high salinity reduces the dehydrogenase activity and endogenous respiration rate of microorganisms, and may even cause plasmolysis, which is highly detrimental to the microbial community. Furthermore, it can affect the entire biological system, leading to problems such as sludge floating and increased suspended solids in the effluent.

[0004] Physicochemical methods remove pollutants through physicochemical processes. These methods are simple to operate, stable, easy to maintain, and effective. Commonly used physicochemical treatment methods include adsorption, ion exchange, membrane separation, evaporation, and flocculation. Adsorption primarily uses porous, highly absorbent adsorbent materials to remove pollutants from water. Ion exchange mainly uses cation and anion exchange resins to desalinate water. The main drawback of this method is the poor resistance of the ion exchange resins to organic pollutants in wastewater, resulting in high treatment costs. Membrane separation technology utilizes semi-permeable membranes to selectively separate specific substances based on their molecular particle size. Commonly used methods include microfiltration, ultrafiltration, nanofiltration, reverse osmosis, dialysis, and electrodialysis. Membrane separation is prone to secondary pollution, has high costs, and limited treatment capacity. Evaporation is an important means of concentrating, separating, and recovering inorganic salts, but it requires significant equipment investment. Flocculation is a commonly used process in wastewater treatment, effectively removing suspended solids by adding flocculants to wastewater. However, this method is not very effective at removing soluble, recalcitrant organic pollutants.

[0005] Chemical oxidation technology is a commonly used technique in environmental pollution control. It primarily relies on oxidants to oxidize and decompose organic pollutants, transforming them into non-toxic or less toxic substances, or even further mineralizing them into carbon dioxide and water. Based on this, advanced oxidation systems, namely advanced oxidation processes (AOPs), have been developed that use the generation of ·OH free radicals as active intermediates. AOPs have strong oxidizing power, wide applicability, and are easy to industrialize. Common AOPs include photocatalytic oxidation, Fenton and Fenton-like processes, ozone catalytic oxidation, electrochemical oxidation, and wet oxidation. Photocatalytic oxidation uses light to excite a semiconductor catalyst, generating highly oxidizing oxygen vacancies and reducing photogenerated electrons, which further react to produce strong oxidizing free radicals ·OH, or directly oxidize and degrade pollutants. However, photocatalysts have poor stability in complex systems, and the coexisting inorganic salt anions and humic acids can significantly reduce oxidation efficiency, limiting their effectiveness in treating actual wastewater. Furthermore, artificial light sources consume a large amount of electricity. Fenton and Fenton-like processes rely on Fe... 2+ Fenton's reagent, composed of H2O2, can treat organic wastewater, but this method requires an acidic environment, has a high demand for iron salts, and iron sludge can easily cause secondary pollution. Ozone catalytic oxidation can rapidly remove color, odor, and organic pollutants from wastewater, but the low solubility of ozone in water limits its utilization rate and the yield of ·OH. Electrochemical oxidation is characterized by high automation, modularity, simple operation, and compatibility with conventional treatment technologies; however, its high investment and operating costs limit its application. Wet oxidation is mainly used for treating high-concentration, toxic, harmful, and recalcitrant wastewater; however, current domestic research on this method is mostly concentrated in small- and pilot-scale stages and requires further development.

[0006] Therefore, we look forward to a material for high-salt organic wastewater that can achieve zero discharge and resource recycling of high-salt, high-concentration, and difficult-to-degrade organic wastewater. Summary of the Invention

[0007] The purpose of this invention is to overcome the problems existing in the prior art and provide a material for treating high-salt organic wastewater and its preparation method. The material of this invention can not only significantly reduce the COD value of wastewater, but also effectively recover and reuse substances in the wastewater. Furthermore, the method described in this invention is simple, low-cost, and produces minimal environmental pollution.

[0008] The objective of this invention and the technical problem it solves are achieved by the following technical solutions.

[0009] One aspect of the present invention provides a high-salt organic wastewater treatment material, comprising:

[0010] Component A, wherein component A is 2,6-pyridinedicarboxylic acid;

[0011] Component B, by weight percentage, comprises the following raw materials and contents: modified starch 40-60%, polyaluminum chloride 20-40%, polyferric sulfate 10-20%; and

[0012] Component C, wherein component C is a porous adsorption material.

[0013] Preferably, the preparation process of the modified starch is as follows: starch is mixed with water and stirred evenly, the pH of the solution is adjusted to 5.6-6.0, cyclodextrin is added, and the mixture is heated in a water bath at 90-95°C with constant stirring. The reaction is stopped when the starch slurry begins to gelatinize until it becomes a complete paste. The resulting paste-like modified starch is then freeze-dried under vacuum and ground into powder to obtain the modified starch.

[0014] Preferably, the starch, water, and cyclodextrin are added in a material-to-liquid ratio of 1-3g:100mL:2-5g.

[0015] Preferably, the vacuum freeze-drying conditions are: temperature -40 to -30°C, time 10-12 hours.

[0016] Preferably, the porous organic carbon framework material is prepared as follows:

[0017] Low-rank coal is crushed, screened, and washed to obtain coal powder particles of 80-200 mesh.

[0018] Coal powder particles were added to SnCl2-HCl aqueous solution and ultrasonically dispersed for 10-30 min for sensitization. Then, the coal powder particles were removed, washed, and dried to obtain sensitized coal powder particles.

[0019] The sensitized coal powder particles were added to an organic solvent and heated for 30-60 minutes, and then removed to obtain the heat-treated coal powder particles.

[0020] The heat-treated coal powder particles are mixed with rare earth metal compounds at a mass ratio of 1:0.03-0.07 and then placed in a tube furnace. The mixture is heated to 800-1200℃ at a heating rate of 5-15℃ / min under a nitrogen atmosphere for 2-4 hours. After natural cooling to room temperature, a porous adsorbent material is obtained.

[0021] Preferably, the low-rank coal is selected from one or more of bituminous coal and lignite.

[0022] Preferably, in the SnCl2-HCl aqueous solution, the concentration of SnCl2 is 2-6 g / L and the concentration of HCl is 10-20 wt%.

[0023] Preferably, the organic solvent is selected from one or more of ethanol, propanol, butanol, isopropanol, sec-butanol, or sec-pentanol.

[0024] Preferably, the rare earth metal compound is selected from any one of the following chlorides, hydroxides or oxides: La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu.

[0025] Another aspect of the present invention provides a method for treating high-salt organic wastewater, comprising the following steps:

[0026] Add component B to the wastewater to be treated at a rate of 80-100 mg per 100 mL of wastewater and stir at a speed of 100-200 rpm until no sediment is produced. Then filter to obtain the first effluent.

[0027] In the first effluent obtained, add component A at a rate of 20-40 mg per 100 mL of water and stir at a speed of 100-200 rpm for 20-40 min. Add component C and let stand for 8-12 h. Then filter to obtain the final effluent, the second effluent.

[0028] The resulting second effluent was subjected to conventional crystallization treatment to obtain the final effluent.

[0029] By employing the above technical solution, the present invention has at least the following advantages: The present invention achieves efficient treatment of high-salinity wastewater through the synergistic effect of components A, B, and C. Component A is a chelating agent capable of removing heavy metal ions from water; component B, as a flocculant, enables the flocculation and precipitation of pollutants in wastewater; and component C, as an adsorbent, adsorbs small molecule substances in wastewater. The three components work together to achieve efficient treatment of high-salinity wastewater.

[0030] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below. Detailed Implementation

[0031] To make the technical means, creative features, achieved objectives, and effects of this invention readily understandable, the technical solutions in the embodiments of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0032] Example 1:

[0033] A method for preparing a high-salt organic wastewater treatment material includes:

[0034] Component A: 2,6-pyridinedicarboxylic acid.

[0035] Component B:

[0036] Starch and water were mixed and stirred evenly. The pH of the solution was adjusted to 5.6-6.0, and β-cyclodextrin was added. The mixture was heated in a water bath at 93°C with constant stirring. The reaction was stopped when the starch slurry began to gelatinize and eventually became a complete paste. The resulting modified starch paste was freeze-dried under vacuum at -35°C for 11 hours and then ground into powder to obtain modified starch. In the above process, starch, water and cyclodextrin were added in a material-to-liquid ratio of 2g:100mL:3.5g.

[0037] Mix 50% modified starch, 30% polyaluminum chloride, and 20% polyferric sulfate evenly by weight percentage.

[0038] Component C:

[0039] After crushing, screening and washing, Fengci bituminous coal is obtained as 80-200 mesh coal powder particles.

[0040] Coal powder particles were added to a SnCl2-HCl aqueous solution (SnCl2 concentration was 4 g / L, HCl concentration was 15 wt%) and ultrasonically dispersed for 20 min for sensitization. Then, the coal powder particles were taken out, washed, and dried to obtain sensitized coal powder particles.

[0041] The sensitized coal powder particles were added to ethanol and heated for 45 minutes, and then removed to obtain the heat-treated coal powder particles.

[0042] The heat-treated coal powder particles were mixed with lanthanum oxide at a mass ratio of 1:0.05 and placed in a tube furnace. The mixture was then subjected to high-temperature heat treatment at 1000℃ for 3 hours under a nitrogen atmosphere at a heating rate of 10℃ / min. After natural cooling to room temperature, a porous adsorbent material was obtained.

[0043] A method for treating high-salt wastewater is as follows: add component B to the wastewater to be treated at a rate of 90 mg per 100 mL of wastewater and stir at a speed of 200 rpm until no sediment is produced, then filter to obtain the first effluent;

[0044] In the first effluent, add component A at a rate of 30 mg per 100 mL of water and stir at 200 rpm for 30 min. Add component C and let stand for 10 h. Then filter to obtain the second effluent.

[0045] The resulting second effluent was subjected to conventional crystallization treatment to obtain the final effluent.

[0046] Example 2:

[0047] A method for preparing a high-salt organic wastewater treatment material includes:

[0048] Component A: 2,6-pyridinedicarboxylic acid.

[0049] Component B:

[0050] Starch and water were mixed and stirred evenly. The pH of the solution was adjusted to 5.6-6.0, and β-cyclodextrin was added. The mixture was heated in a 95°C water bath with constant stirring. The reaction was stopped when the starch paste began to gelatinize and became a complete paste. The resulting modified starch paste was freeze-dried under vacuum at -40°C for 10 hours and then ground into powder to obtain modified starch. In the above process, starch, water and cyclodextrin were added in a material-to-liquid ratio of 1g:100mL:2g.

[0051] Mix 60% modified starch, 20% polyaluminum chloride, and 20% polyferric sulfate evenly by weight percentage.

[0052] Component C:

[0053] After crushing, screening and washing, lignite is obtained as 80-200 mesh coal powder particles.

[0054] Coal powder particles were added to a SnCl2-HCl aqueous solution (SnCl2 concentration was 6 g / L, HCl concentration was 20 wt%) and ultrasonically dispersed for 10 min for sensitization. Then, the coal powder particles were taken out, washed, and dried to obtain sensitized coal powder particles.

[0055] The sensitized coal powder particles were added to isopropanol and heated for 60 minutes, and then removed to obtain the heat-treated coal powder particles.

[0056] The heat-treated coal powder particles were mixed with cerium hydroxide at a mass ratio of 1:0.03 and placed in a tube furnace. The mixture was then heated to 1200℃ for 2 hours under a nitrogen atmosphere at a heating rate of 15℃ / min. After natural cooling to room temperature, a porous adsorbent material was obtained.

[0057] A method for treating high-salt wastewater is as follows: add component B to the wastewater to be treated at a rate of 90 mg per 100 mL of wastewater and stir at a speed of 200 rpm until no sediment is produced, then filter to obtain the first effluent;

[0058] In the first effluent, add component A at a rate of 30 mg per 100 mL of water and stir at 200 rpm for 30 min. Add component C and let stand for 10 h. Then filter to obtain the second effluent.

[0059] The resulting second effluent was subjected to conventional crystallization treatment to obtain the final effluent.

[0060] Example 3:

[0061] A method for preparing a high-salt organic wastewater treatment material includes:

[0062] Component A: 2,6-pyridinedicarboxylic acid.

[0063] Component B:

[0064] Starch and water were mixed and stirred evenly. The pH of the solution was adjusted to 5.6-6.0, and β-cyclodextrin was added. The mixture was heated in a 90°C water bath with constant stirring. The reaction was stopped when the starch paste began to gelatinize and became a complete paste. The resulting modified starch paste was freeze-dried at -30°C for 12 hours and then ground into powder to obtain modified starch. In the above process, starch, water and cyclodextrin were added in a material-to-liquid ratio of 3g:100mL:5g.

[0065] Mix 40% modified starch, 40% polyaluminum chloride, and 20% polyferric sulfate evenly by weight percentage.

[0066] Component C:

[0067] After crushing, screening and washing, lignite is obtained as 80-200 mesh coal powder particles.

[0068] Coal powder particles were added to a SnCl2-HCl aqueous solution (SnCl2 concentration was 2 g / L, HCl concentration was 10 wt%) and ultrasonically dispersed for 30 min for sensitization. Then, the coal powder particles were taken out, washed, and dried to obtain sensitized coal powder particles.

[0069] The sensitized coal powder particles were added to propanol and heated for 30 minutes, and then removed to obtain the heat-treated coal powder particles.

[0070] The heat-treated coal powder particles were mixed with cerium hydroxide at a mass ratio of 1:0.07 and placed in a tube furnace. The mixture was then heated to 800-1200℃ for 4 hours under a nitrogen atmosphere at a heating rate of 5℃ / min. After natural cooling to room temperature, a porous adsorbent material was obtained.

[0071] A method for treating high-salt wastewater is as follows: add component B to the wastewater to be treated at a rate of 90 mg per 100 mL of wastewater and stir at a speed of 200 rpm until no sediment is produced, then filter to obtain the first effluent;

[0072] In the first effluent, add component A at a rate of 30 mg per 100 mL of water and stir at 200 rpm for 30 min. Add component C and let stand for 10 h. Then filter to obtain the second effluent.

[0073] The resulting second effluent was subjected to conventional crystallization treatment to obtain the final effluent.

[0074] Comparative Example 1:

[0075] A method for preparing a high-salt organic wastewater treatment material includes:

[0076] Component B:

[0077] Starch and water were mixed and stirred evenly. The pH of the solution was adjusted to 5.6-6.0, and β-cyclodextrin was added. The mixture was heated in a water bath at 93°C with constant stirring. The reaction was stopped when the starch slurry began to gelatinize and eventually became a complete paste. The resulting modified starch paste was freeze-dried under vacuum at -35°C for 11 hours and then ground into powder to obtain modified starch. In the above process, starch, water and cyclodextrin were added in a material-to-liquid ratio of 2g:100mL:3.5g.

[0078] Mix 50% modified starch, 30% polyaluminum chloride, and 20% polyferric sulfate evenly by weight percentage.

[0079] Component C:

[0080] After crushing, screening and washing, Fengci bituminous coal is obtained as 80-200 mesh coal powder particles.

[0081] Coal powder particles were added to a SnCl2-HCl aqueous solution (SnCl2 concentration was 4 g / L, HCl concentration was 15 wt%) and ultrasonically dispersed for 20 min for sensitization. Then, the coal powder particles were taken out, washed, and dried to obtain sensitized coal powder particles.

[0082] The sensitized coal powder particles were added to ethanol and heated for 45 minutes, and then removed to obtain the heat-treated coal powder particles.

[0083] The heat-treated coal powder particles were mixed with lanthanum oxide at a mass ratio of 1:0.05 and placed in a tube furnace. The mixture was then subjected to high-temperature heat treatment at 1000℃ for 3 hours under a nitrogen atmosphere at a heating rate of 10℃ / min. After natural cooling to room temperature, a porous adsorbent material was obtained.

[0084] A method for treating high-salt wastewater is as follows: add component B to the wastewater to be treated at a rate of 90 mg per 100 mL of wastewater and stir at a speed of 200 rpm until no sediment is produced, then filter to obtain the first effluent;

[0085] Add component C to the first effluent and let it stand for 10 hours, then filter to obtain the second effluent;

[0086] The resulting second effluent was subjected to conventional crystallization treatment to obtain the final effluent.

[0087] Comparative Example 2:

[0088] A method for preparing a high-salt organic wastewater treatment material includes:

[0089] Component A: 2,6-pyridinedicarboxylic acid.

[0090] Component C:

[0091] After crushing, screening and washing, Fengci bituminous coal is obtained as 80-200 mesh coal powder particles.

[0092] Coal powder particles were added to a SnCl2-HCl aqueous solution (SnCl2 concentration was 4 g / L, HCl concentration was 15 wt%) and ultrasonically dispersed for 20 min for sensitization. Then, the coal powder particles were taken out, washed, and dried to obtain sensitized coal powder particles.

[0093] The sensitized coal powder particles were added to ethanol and heated for 45 minutes, and then removed to obtain the heat-treated coal powder particles.

[0094] The heat-treated coal powder particles were mixed with lanthanum oxide at a mass ratio of 1:0.05 and placed in a tube furnace. The mixture was then subjected to high-temperature heat treatment at 1000℃ for 3 hours under a nitrogen atmosphere at a heating rate of 10℃ / min. After natural cooling to room temperature, a porous adsorbent material was obtained.

[0095] A method for treating high-salt wastewater is as follows: Component A is added to the wastewater to be treated at a rate of 30 mg per 100 mL of water and stirred at 200 rpm for 30 min. Component C is then added and allowed to stand for 10 h. The mixture is then filtered, and the resulting water is subjected to conventional crystallization treatment to obtain the final effluent.

[0096] Comparative Example 3:

[0097] A method for preparing a high-salt organic wastewater treatment material includes:

[0098] Component A: 2,6-pyridinedicarboxylic acid.

[0099] Component B:

[0100] Starch and water were mixed and stirred evenly. The pH of the solution was adjusted to 5.6-6.0, and β-cyclodextrin was added. The mixture was heated in a water bath at 93°C with constant stirring. The reaction was stopped when the starch slurry began to gelatinize and eventually became a complete paste. The resulting modified starch paste was freeze-dried under vacuum at -35°C for 11 hours and then ground into powder to obtain modified starch. In the above process, starch, water and cyclodextrin were added in a material-to-liquid ratio of 2g:100mL:3.5g.

[0101] Mix 50% modified starch, 30% polyaluminum chloride, and 20% polyferric sulfate evenly by weight percentage.

[0102] A method for treating high-salt wastewater is as follows: add component B to the wastewater to be treated at a rate of 90 mg per 100 mL of wastewater and stir at a speed of 200 rpm until no sediment is produced, then filter to obtain the first effluent;

[0103] In the first effluent, add component A at a rate of 30 mg per 100 mL of water and stir at 200 rpm for 30 min. Then filter to obtain the second effluent.

[0104] The resulting second effluent was subjected to conventional crystallization treatment to obtain the final effluent.

[0105] Application example: Testing the effectiveness of different treatment materials and methods in treating high-salinity wastewater

[0106] Experimental subject: Wastewater from the production of hydrazine hydrate by a certain enterprise. The water quality before treatment was as follows: Sodium chloride: 29452 mg / L; Sodium sulfate: 98739 mg / L; COD: 452 mg / L; Ammonia nitrogen: 325 mg / L.

[0107] Experimental method: 6L of the above wastewater was divided into 6 equal parts of 1L each, and treated according to the methods of Examples 1-3 and Comparative Examples 1-3. The indicators of the treated wastewater were then tested.

[0108] Experimental results: see Table 1.

[0109] Table 1 Comparison of water quality before and after wastewater treatment.

[0110] serial number Sodium chloride (mg / L) Sodium sulfate (mg / L) COD (mg / L) Ammonia nitrogen (mg / L) Example 1 4.2 6.5 38 23 Example 2 4.5 6.4 42 25 Example 3 4.3 6.5 39 26 Comparative Example 1 12.4 17.6 78 53 Comparative Example 2 28.3 56.7 112 105 Comparative Example 3 22.6 34.4 89 78

[0111] As can be seen from the results in Table 1, compared with comparative examples 1-3, the treatment materials and methods of examples 1-3 of the present invention can effectively treat pollutants in high-salt wastewater.

[0112] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the methods and techniques disclosed above without departing from the scope of the present invention to create equivalent embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A material for treating high-salt organic wastewater, characterized in that, include: Component A, wherein component A is 2,6-pyridinedicarboxylic acid; Component B, by weight percentage, comprises the following raw materials and contents: modified starch 40-60%, polyaluminum chloride 20-40%, and polyferric sulfate 10-20%; as well as Component C, wherein component C is a porous adsorption material; The preparation process of the modified starch is as follows: starch is mixed with water and stirred evenly, the pH of the solution is adjusted to 5.6-6.0, cyclodextrin is added, and the mixture is heated in a water bath at 90-95℃ with constant stirring. When the starch paste starts to gelatinize until it becomes a complete paste, the reaction is stopped. The resulting paste-like modified starch is then freeze-dried under vacuum and ground into powder to obtain the modified starch. The preparation method of the porous adsorption material is as follows: Low-rank coal is crushed, screened, and washed to obtain coal powder particles of 80-200 mesh. Add coal powder particles to Sensitization was achieved by ultrasonic dispersion in an aqueous solution for 10-30 minutes. Then, the coal powder particles were removed, washed, and dried to obtain sensitized coal powder particles. The sensitized coal powder particles were added to an organic solvent and heated for 30-60 minutes, and then removed to obtain the heat-treated coal powder particles. The heat-treated coal powder particles were mixed with rare earth metal compounds at a mass ratio of 1:0.03-0.07 and then placed in a tube furnace. The mixture was heated to 800-1200℃ at a heating rate of 5-15℃ / min under a nitrogen atmosphere for 2-4 hours. After natural cooling to room temperature, a porous adsorbent material was obtained. The rare earth metal compound is selected from the group consisting of any one of the following chlorides, hydroxides or oxides: La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu.

2. The high-salt organic wastewater treatment material according to claim 1, characterized in that, The starch, water, and cyclodextrin are added at a ratio of 1-3g:100mL:2-5g.

3. The high-salt organic wastewater treatment material according to claim 1, characterized in that, The vacuum freeze-drying conditions are: temperature -40~-30℃, time 10-12h.

4. The high-salt organic wastewater treatment material according to claim 1, characterized in that, The low-rank coal is selected from one or two types of bituminous coal and lignite.

5. The high-salt organic wastewater treatment material according to claim 1, characterized in that, The In aqueous solution, The concentration of the active ingredient is 2-6 g / L, and the concentration of HCl is 10-20 wt%.

6. The high-salt organic wastewater treatment material according to claim 1, characterized in that, The organic solvent is selected from one or more of ethanol, propanol, butanol, isopropanol, sec-butanol, or sec-pentanol.

7. A method for treating high-salt organic wastewater, characterized in that, The high-salt organic wastewater is treated using the treatment material according to any one of claims 1-6, and the treatment method includes the following steps: Add component B to the wastewater to be treated at a rate of 80-100 mg per 100 mL of wastewater and stir at a speed of 100-200 rpm until no sediment is produced. Then filter to obtain the first effluent. Add component A to the first effluent at a rate of 20-40 mg per 100 mL of water and stir at 100-200 rpm for 20-40 min. Add component C and let stand for 8-12 h. Then filter to obtain the second effluent. The resulting second effluent was subjected to conventional crystallization treatment to obtain the final effluent.

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