Manganese oxide-based oily wastewater treatment agent and method for treating oily wastewater
By combining tannic acid-modified manganese oxide demulsifier with hydrogen peroxide, the high cost and complex equipment problems of air flotation treatment of oily wastewater were solved, achieving efficient oil-water separation and resource utilization of waste manganese oxides, and reducing treatment costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 天津大学浙江研究院
- Filing Date
- 2025-04-17
- Publication Date
- 2026-05-19
AI Technical Summary
Existing air flotation methods for treating oily wastewater have high operating costs, complex equipment operation, and poor performance in treating high-concentration emulsions, resulting in the ineffective utilization of waste manganese oxides.
Tannic acid-modified manganese oxide demulsifier (TA-MO) combined with hydrogen peroxide is used to achieve oil-water separation by generating microbubbles through catalytic oxidation. The catalytic properties and surface modification of manganese oxide are used to improve demulsification efficiency, achieving efficient demulsification and recycling.
It achieves efficient demulsification at room temperature with a demulsification efficiency of over 96%, reduces costs, realizes the resource utilization of waste manganese oxides, and forms a green circular economy model.
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Figure CN120136242B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of oil-water separation technology, specifically relating to an oily wastewater treatment agent based on manganese oxide and a method for treating oily wastewater. Background Technology
[0002] With the rapid development of industrialization and modernization, the discharge of oily wastewater has been increasing year by year. Due to the presence of emulsification, the treatment of oily wastewater has become one of the challenges in wastewater treatment. Common methods for treating oily wastewater include air flotation, sedimentation, adsorption, and chemical demulsification. Among these, air flotation has attracted widespread attention from researchers due to its rapid and efficient separation effect. Air flotation is further divided into electrolytic air flotation, induced air flotation, dissolved air flotation, biological air flotation, and chemical air flotation. Each of these methods has its advantages and disadvantages, but they generally suffer from drawbacks such as high operating costs, complex equipment operation, and poor performance in treating high-concentration emulsions.
[0003] Meanwhile, the large-scale recycling and resource utilization of waste batteries is facing increasingly serious challenges. Statistics show that my country discards 500,000 tons of waste zinc-manganese batteries annually, with manganese oxides accounting for approximately 20% to 30% of these batteries. These waste zinc-manganese batteries contain various harmful heavy metals such as mercury, zinc, copper, and manganese. Improper disposal will cause serious pollution to soil and water bodies, threatening human health. Against this backdrop, exploring technologies for recycling and reusing manganese oxides from waste batteries and applying them to oily wastewater treatment aligns with the current green circular economy concept. Summary of the Invention
[0004] The purpose of this application is to provide an oily wastewater treatment agent and a method for treating oily wastewater based on manganese oxides, so as to solve the technical problems of high operating costs, complex equipment operation, and poor treatment effect of high-concentration emulsions in the existing air flotation method for treating oily wastewater.
[0005] To achieve the above objectives, the first aspect of this application provides an oily wastewater treatment agent based on manganese oxide, comprising a demulsifier TA-MO and an auxiliary agent hydrogen peroxide, wherein the demulsifier TA-MO is a manganese oxide modified with tannic acid.
[0006] In one or more embodiments, the method for preparing the demulsifier TA-MO includes:
[0007] The raw material containing manganese dioxide was immersed in a tannic acid solution, and then filtered, washed and dried in sequence to obtain the demulsifier TA-MO.
[0008] In one or more embodiments, the manganese dioxide-containing raw material is recovered from the electrode black powder of a manganese-containing battery, and the method for recovering the manganese dioxide-containing raw material includes:
[0009] The battery black powder containing manganese batteries is evenly dispersed in water, allowed to stand and clarify, and then filtered to collect the filter residue.
[0010] The filter residue is washed, dried, ground, and sieved to obtain the raw material containing manganese dioxide.
[0011] In one or more embodiments, the concentration of the tannic acid solution is 10-40 mg / mL, and the immersion time in the step of immersing the raw material containing manganese dioxide in the tannic acid solution is 5-20 min.
[0012] To achieve the above objectives, a second aspect of this application provides a method for treating oily wastewater, comprising:
[0013] Add the demulsifier TA-MO and the auxiliary agent hydrogen peroxide described in any of the above embodiments to the oily wastewater for demulsification treatment. During the treatment, the emulsion droplets polymerize, demulsify, and float to the surface, thereby achieving oil-water separation.
[0014] In one or more embodiments, the mass concentration of hydrogen peroxide in the oily wastewater is 1 to 4 g / L, and the mass concentration of the demulsifier TA-MO is 0.2 to 1.2 g / L.
[0015] In one or more embodiments, the mass concentration of hydrogen peroxide in the oily wastewater is 2.5 to 3.5 g / L, and the mass concentration of the demulsifier TA-MO is 0.8 to 1 g / L.
[0016] In one or more embodiments, the demulsification treatment is performed at room temperature for 60 to 120 minutes.
[0017] In one or more embodiments, the demulsification process takes 80 to 100 minutes.
[0018] In one or more embodiments, it further includes:
[0019] The reaction solution was filtered and the filter residue was recovered. Then, the residue was washed and dried to obtain the demulsifier TA-MO.
[0020] The advantages of this application, which differ from existing technologies, are:
[0021] This application adopts an integrated demulsification-catalysis technology, which utilizes the catalytic oxidation properties of manganese oxide on hydrogen peroxide to generate microbubbles, combined with the demulsification properties of manganese oxide modified with tannic acid, to efficiently treat high-concentration oily wastewater. It can achieve rapid and efficient demulsification of oily wastewater at room temperature, with a demulsification efficiency of over 96%. It has the advantages of integrating demulsification performance and microbubble generation performance, not relying on external flotation equipment, adapting to the treatment of high-concentration oily wastewater, and being green and environmentally friendly.
[0022] The manganese oxide of this application can be recycled and reused, and can still maintain excellent demulsification performance after multiple uses, which significantly reduces costs.
[0023] This application achieves resource utilization of waste batteries by directional regeneration of manganese oxides, replacing the manganese sand or chemical oxidants used in traditional processes, reducing material costs by 53% and forming a circular economy model of "treating waste with waste". Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this application 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 recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic flowchart of one embodiment of the preparation method of the demulsifier TA-MO of this application;
[0026] Figure 2 This is a schematic flowchart of one embodiment of the method for treating oily wastewater according to this application;
[0027] Figure 3 This is a graph showing the demulsification efficiency data for Example 1 of this application;
[0028] Figure 4 This is a graph showing the demulsification efficiency data for Example 2 of this application;
[0029] Figure 5 This is a graph showing the demulsification efficiency data for Example 3 of this application;
[0030] Figure 6 This is a graph showing the demulsification efficiency data for Example 4 of this application. Detailed Implementation
[0031] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.
[0032] To address the problems existing in the current air flotation method for treating oily wastewater and to realize the resource utilization of waste batteries, the applicant has developed an oily wastewater treatment agent based on manganese oxide. This agent can be applied to the rapid demulsification treatment of oily wastewater at room temperature, achieving oil-water air flotation separation.
[0033] Specifically, the oily wastewater treatment agent of this application includes demulsifier TA-MO and auxiliary agent hydrogen peroxide, wherein the demulsifier TA-MO is a manganese oxide modified with tannic acid.
[0034] In one embodiment, the auxiliary agent hydrogen peroxide can be pure hydrogen peroxide, an aqueous solution of hydrogen peroxide, or solid hydrogen peroxide, etc., all of which can achieve the effect of this embodiment.
[0035] In the demulsifier TA-MO, the manganese oxide is modified with tannic acid. The adhesive properties of tannic acid can be used to hydrophilically modify the surface of the manganese oxide, thereby improving its dispersion performance at the oil-water interface and thus increasing its demulsification efficiency.
[0036] Specifically, please refer to Figure 1 , Figure 1 This is a schematic flowchart of one embodiment of the preparation method of the demulsifier TA-MO of this application.
[0037] like Figure 1 As shown, the preparation method includes:
[0038] S100. The raw material containing manganese dioxide is immersed in tannic acid solution, and then filtered, washed and dried in sequence to obtain the demulsifier TA-MO.
[0039] In one embodiment, the raw material containing manganese dioxide can be recovered from a manganese-containing battery. The manganese-containing battery can be a commonly used manganese-containing battery such as a zinc-manganese battery, all of which can achieve the effect of this embodiment.
[0040] Specifically, recycling methods may include:
[0041] The battery black powder containing manganese batteries is evenly dispersed in water, allowed to stand and clarify, and then filtered to collect the filter residue. The filter residue is then washed, dried, ground, and sieved to obtain the raw material containing manganese dioxide.
[0042] The battery black powder of manganese-containing batteries is a mixture of manganese dioxide, electrode reduction products, carbon powder, ammonium chloride and zinc oxide. By dispersing it in water and then filtering it, water-soluble electrode reduction products, ammonium chloride and zinc chloride can be removed. After thorough washing and drying, raw materials with high purity manganese dioxide can be recovered.
[0043] In one embodiment, the mass ratio of battery black powder to water can be 1:10.
[0044] In one embodiment, the filter residue can be cleaned by repeatedly washing it three times with distilled water and anhydrous ethanol.
[0045] In one embodiment, the sieve used for sieving can be 100 to 300 mesh.
[0046] By immersing raw materials containing manganese dioxide in a tannic acid solution, the adhesive properties of tannic acid can be used to modify the surface of manganese oxides to be hydrophilic, thereby improving the dispersion performance of manganese oxides at the oil-water interface and thus increasing their demulsification efficiency.
[0047] In one embodiment, the concentration of the tannic acid solution can be 10–40 mg / mL.
[0048] In one embodiment, the immersion time of the raw material containing manganese dioxide in the tannic acid solution can be 5 to 20 minutes.
[0049] Based on the demulsifier TA-MO prepared according to the above embodiments, manganese oxide can be fully dispersed at the oil-water interface through tannic acid modification. At the same time, manganese oxide has a porous and rough surface, which increases the specific surface area and exposes more Mn active sites. When the demulsifier TA-MO and the auxiliary agent hydrogen peroxide are added to oily wastewater, manganese oxide can promote the decomposition of H2O2 to generate hydroxyl radicals, effectively oxidizing surfactants and oil droplets in the emulsion. Combined with the catalytic decomposition of H2O2 by manganese oxide to generate O2 bubbles to achieve air flotation, the combined effect can promote the polymerization, demulsification and floating of emulsion droplets, thereby achieving oil-water separation.
[0050] Bubbles can be generated during the demulsification process, eliminating the need to inject gas into the wastewater or generate gas through electrolysis. It can also be applied to the treatment of high-concentration oily wastewater, solving the problems of high operating costs, complex equipment operation, and poor treatment effect of high-concentration emulsions in traditional air flotation processes.
[0051] Understandably, in the above embodiments, the manganese oxide of the demulsifier TA-MO acts as a catalyst. Therefore, the demulsifier TA-MO can be recycled and reused, and can still maintain stable catalytic performance after multiple reuses, effectively reducing the cost of using the demulsifier and reducing the cost of treating oily wastewater.
[0052] This application also provides a method for treating oily wastewater, wherein the method uses the demulsifier of any of the above embodiments to separate oil and water in the oily wastewater.
[0053] Specifically, please refer to Figure 2 , Figure 2 This is a schematic flowchart of one embodiment of the method for treating oily wastewater according to this application.
[0054] like Figure 2 As shown, the processing method includes:
[0055] S10. Add demulsifier TA-MO and auxiliary agent hydrogen peroxide to the oily wastewater to carry out demulsification treatment. During the treatment process, the emulsion droplets polymerize, demulsify and float to the surface, thus achieving oil-water separation.
[0056] In one embodiment, the mass concentration of hydrogen peroxide in the oily wastewater can be 1–4 g / L, and the mass concentration of the demulsifier TA-MO can be 0.2–1.2 g / L.
[0057] More preferably, in oily wastewater, the mass concentration of hydrogen peroxide can be 2.5 to 3.5 g / L, and the mass concentration of demulsifier TA-MO can be 0.8 to 1 g / L.
[0058] It should be noted that in oily wastewater, excessive hydrogen peroxide or manganese oxide will reduce the demulsification efficiency. This is because excessive hydrogen peroxide or manganese oxide will generate excessive O2 bubbles. Excessive O2 bubbles will carry tiny oil droplets to form secondary emulsification, which will affect the demulsification efficiency.
[0059] In one embodiment, the demulsification process can take 60 to 120 minutes.
[0060] More preferably, the demulsification process can be carried out for 80 to 100 minutes.
[0061] Furthermore, the process may include a step of recovering the demulsifier TA-MO after completion, namely:
[0062] S20, filter the reaction solution and recover the filter residue, then wash and dry to recover the demulsifier TA-MO.
[0063] Because the manganese oxide in the demulsifier TA-MO plays a catalytic role, it can be recycled and reused, and can maintain stable catalytic performance even after multiple reuses, effectively reducing the cost of using demulsifiers and reducing the cost of treating oily wastewater.
[0064] In one embodiment, the filter residue can be washed using ultrasonic cleaning.
[0065] The oily wastewater treatment method based on the above embodiments adopts an integrated demulsification-catalysis technology, which breaks through the limitations of traditional processes with a single treatment target. It can achieve rapid and efficient demulsification of oily wastewater at room temperature. Bubbles can be generated during the demulsification process, eliminating the need to inject gas into the wastewater or generate gas through electrolysis. It can also be applied to the treatment of high-concentration oily wastewater, solving the problems of high operating costs, complex equipment operation, and poor treatment effect of high-concentration emulsions in traditional air flotation processes.
[0066] The effects of the technical solution of this application will be further explained in detail below with reference to specific embodiments.
[0067] Example 1:
[0068] The original black substance OB from the waste zinc-manganese battery was mixed with water at a ratio of 1:10, stirred, allowed to stand and clarify, and then filtered to obtain the filter residue. The filter residue was washed three times each with distilled water and anhydrous ethanol, dried at 100°C for 8 hours, ground in a mortar and sieved through a 300-mesh sieve to obtain MO, which was then placed in a sample bottle for later use.
[0069] 2g of MO was added to a 40mg / mL tannic acid aqueous solution and soaked for 5min. After filtration and washing with ultrapure water several times, it was dried at 100℃ for 8h. After grinding with a mortar, TA-MO-1 was obtained and put into a sample bottle for later use.
[0070] Example 2:
[0071] The original black substance OB from the waste zinc-manganese battery was mixed with water at a ratio of 1:10, stirred, allowed to stand and clarify, and then filtered to obtain the filter residue. The filter residue was washed three times each with distilled water and anhydrous ethanol, dried at 100°C for 8 hours, ground in a mortar and sieved through a 300-mesh sieve to obtain MO, which was then placed in a sample bottle for later use.
[0072] 1g of MO was added to a 10mg / mL tannic acid aqueous solution and soaked for 20min. After filtration and washing with ultrapure water several times, it was dried at 100℃ for 8h. After grinding with a mortar, TA-MO-2 was obtained and stored in a sample bottle for later use.
[0073] Example 3:
[0074] The original black substance OB from the waste zinc-manganese battery was mixed with water at a ratio of 1:10, stirred, allowed to stand and clarify, and then filtered to obtain the filter residue. The filter residue was washed three times each with distilled water and anhydrous ethanol, dried at 100°C for 8 hours, ground in a mortar and sieved through a 300-mesh sieve to obtain MO, which was then placed in a sample bottle for later use.
[0075] 0.5 g of MO was added to a 20 mg / mL tannic acid aqueous solution and soaked for 10 min. After filtration and washing with ultrapure water several times, it was dried at 100 °C for 8 h. After grinding with a mortar, TA-MO-3 was obtained and stored in a sample bottle for later use.
[0076] Example 4: Oily wastewater treatment experiment
[0077] Add 5 mL of diesel oil to 500 mL of water and add 1 mg / L of SDBS. Stir at 2000 r / min for 30 min to prepare an oil-in-water emulsion to simulate high-concentration oily wastewater.
[0078] 100 mL of the oil-in-water emulsion was added to a 100 mL stoppered colorimetric tube, along with 80 mg of TA-MO-1 prepared in Example 1 and 8 mL of 30% H2O2 aqueous solution. Demulsification was then performed for 80 min. The demulsification efficiency was calculated using the following formula:
[0079]
[0080] In the formula, R (%) is the demulsification efficiency, and C0 (%) and C1 (%) are the oil content of the emulsion before and after demulsification, respectively.
[0081] Examples 5 to 19: Oily Wastewater Treatment Experiments
[0082] The experimental method is basically the same as that in Example 4, except that:
[0083] In the experiments of Examples 5 to 19, the amount of TA-MO-1 added, the amount of 30% H2O2 aqueous solution added, and the demulsification time were different.
[0084] Please refer to the table below for the specific experimental parameters of Examples 4 to 19:
[0085]
[0086]
[0087] Example 1: Effect of different manganese oxide concentrations on demulsification efficiency
[0088] Comparing the demulsification efficiency of Examples 4 to 9, we obtained Figure 3 , Figure 3 This is a graph showing the demulsification efficiency data for Example 1 of this application.
[0089] like Figure 3 As shown, at room temperature, with a demulsification time of 80 min and an addition amount of 8 mL of 30% H2O2 aqueous solution, the demulsification efficiency linearly increased from 86.92% to 95.68% when the mass concentration of TA-MO-1 gradually increased from 200 mg / L to 800 mg / L. This indicates that the demulsification process is significantly accelerated with the increase of the amount of TA-MO-1 added.
[0090] This is mainly due to the fact that the porous and rough surface of TA-MO increases the specific surface area, exposes more Mn active sites, promotes the decomposition of H2O2 to generate hydroxyl radicals, and effectively oxidizes surfactants and oil droplets in the emulsion; at the same time, the hydrophilic modification of tannic acid enhances the dispersibility of particles at the oil-water interface, and combined with the catalytic effect of manganese oxide on the generation of O2 from H2O2, it promotes the polymerization, demulsification and floating of emulsion droplets.
[0091] When the mass concentration of TA-MO-1 gradually increased from 800 mg / L to 1200 mg / L, the demulsification efficiency first increased and then decreased. This may be because the O2 bubbles generated by the excessive decomposition of H2O2 encapsulate tiny oil droplets, forming secondary emulsification. Since the demulsification efficiency at a TA-MO-1 mass concentration of 1000 mg / L did not increase significantly compared to 800 mg / L, an addition of 800 mg / L of TA-MO-1 was chosen as the optimal dosage.
[0092] Example 2: The effect of different demulsification times on demulsification efficiency
[0093] Comparing the demulsification efficiency of Examples 4, 10-14, we obtained Figure 4 , Figure 4 This is a graph showing the demulsification efficiency data for Example 2 of this application.
[0094] like Figure 4 As shown, at room temperature with a fixed demulsifier concentration of 800 mg / L and an addition amount of 8 mL of 30% H2O2 aqueous solution, the demulsification efficiency rapidly increased from 66.71% to 90.04% when the demulsification time gradually increased from 20 min to 60 min.
[0095] When the demulsification time gradually increased from 60 min to 80 min, the rate of increase in demulsification efficiency slowed down, and the demulsification efficiency was 95.68% at 80 min.
[0096] When the demulsification time gradually increased from 80 minutes to 100 minutes, the demulsification efficiency tended to stabilize.
[0097] The above data shows that in the early stage of demulsification, the demulsification efficiency increases rapidly due to the hydrophilic modification of tannic acid on the TA-MO-1 surface and the generation of microbubbles through autocatalysis. In the later stage of demulsification, as the amount of H2O2 that can be decomposed is gradually depleted, the rate of free radical generation decreases. At the same time, the accumulation of oxidation products on the TA-MO-1 surface may partially cover the active sites, limiting the catalytic efficiency, resulting in the demulsification efficiency tending to stabilize in the later stage.
[0098] Example 3: Effect of different H2O2 concentrations on demulsification efficiency
[0099] Comparing the demulsification efficiency of Examples 4, 15-19, we obtained Figure 5 , Figure 5 This is a graph showing the demulsification efficiency data for Example 3 of this application.
[0100] like Figure 5As shown, at room temperature with a fixed demulsifier concentration of 800 mg / L and a demulsification time of 80 min, when the amount of 30% H2O2 aqueous solution added gradually increased from 0 mL to 8 mL, the demulsification efficiency rapidly increased from 62.15% to 95.68%, indicating that the addition of H2O2 significantly activated the autocatalytic activity of TA-MO-1.
[0101] When the amount of 30% H2O2 aqueous solution added increased from 8 mL to 10 mL, the demulsification efficiency slowly increased from 95.68% to 95.92%. When the amount of H2O2 was 12 mL, the demulsification efficiency decreased to 93.46%. This may be because when the amount of 30% H2O2 aqueous solution added was 8 mL, the system had basically reached the oxidation-demulsification equilibrium. Excess H2O2 caused decomposition and generated excess O2 bubbles, which carried tiny oil droplets to form secondary emulsification, resulting in a decrease in demulsification efficiency.
[0102] Example 4: Recycling Experiment
[0103] The demulsification experiment was conducted using the experimental method of Example 4. After each demulsification experiment, TA-MO-1 was recovered by filtration. The recovered product was ultrasonically cleaned with anhydrous ethanol for 1 min, then filtered and washed 2-3 times, and then dried in a vacuum oven at 100°C for 8 h. The next demulsification experiment was repeated.
[0104] The demulsification experiment was repeated 10 times using the recovered TA-MO-1, and the demulsification efficiency was calculated each time. Figure 6 , Figure 6 This is a graph showing the demulsification efficiency data for Example 4 of this application.
[0105] like Figure 6 As shown, the demulsification efficiency remained above 95% up to 8 cycles. However, after 8 cycles, the demulsification efficiency dropped precipitously. This may be because the tannic acid modified layer was partially degraded by free radical oxidation, resulting in decreased particle dispersibility and weakened adsorption capacity at the oil-water interface, as well as the active sites being covered and the pores being blocked by oil contamination on the TA-MO-1 surface.
[0106] As can be seen from the above, TA-MO-1 can be recycled and reused. It can still maintain excellent demulsification efficiency after multiple recycling and reuse, but there is a maximum limit to the number of recycling times. It can be recycled up to 8 times, at which time the demulsification efficiency of TA-MO is 95.27%.
[0107] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0108] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An oily wastewater treatment agent based on manganese oxide, characterized in that, The mixture includes a demulsifier TA-MO and an auxiliary agent hydrogen peroxide. The demulsifier TA-MO is a manganese oxide modified with tannic acid. The preparation method of the demulsifier TA-MO includes: immersing a raw material containing manganese dioxide in a tannic acid solution, followed by sequential filtration, washing and drying to obtain the demulsifier TA-MO.
2. The oily wastewater treatment agent according to claim 1, characterized in that, The manganese dioxide-containing raw material is recovered from battery black powder of manganese-containing batteries, and the method for recovering the manganese dioxide-containing raw material includes: The battery black powder containing manganese batteries is evenly dispersed in water, allowed to stand and clarify, and then filtered to collect the filter residue. The filter residue is washed, dried, ground, and sieved to obtain the raw material containing manganese dioxide.
3. The oily wastewater treatment agent according to claim 1, characterized in that, The concentration of the tannic acid solution is 10~40 mg / mL, and the immersion time in the step of immersing the raw material containing manganese dioxide in the tannic acid solution is 5~20 min.
4. A method for treating oily wastewater, characterized in that, include: Oily wastewater is treated with any one of claims 1 to 3, wherein the demulsifier TA-MO and the auxiliary agent hydrogen peroxide are added respectively to perform demulsification treatment. During the treatment process, the emulsion droplets polymerize, demulsify, and float to the surface, thereby achieving oil-water separation.
5. The processing method according to claim 4, characterized in that, In the oily wastewater, the mass concentration of hydrogen peroxide is 1~4 g / L, and the mass concentration of the demulsifier TA-MO is 0.2~1.2 g / L.
6. The processing method according to claim 5, characterized in that, In the oily wastewater, the mass concentration of hydrogen peroxide is 2.5~3.5 g / L, and the mass concentration of the demulsifier TA-MO is 0.8~1 g / L.
7. The processing method according to claim 4, characterized in that, The demulsification process is performed at room temperature for 60-120 minutes.
8. The processing method according to claim 7, characterized in that, The demulsification process takes 80-100 minutes.
9. The processing method according to claim 5, characterized in that, Also includes: The reaction solution was filtered and the filter residue was recovered. After washing and drying, the demulsifier TA-MO was recovered.