Electrocatalytic peroxymonosulfate synergistic wastewater treatment method and device

Abstract

The application belongs to the technical field of water treatment, and provides an electro-catalytic periodate synergistic wastewater treatment method and device. The wastewater treatment method comprises the following steps: adding organic contaminant-containing wastewater to be treated into a wastewater treatment device provided with an anode plate and a cathode plate, adding periodate into the wastewater treatment device, starting a direct current power source connected with the anode plate and the cathode plate to perform wastewater treatment, and discharging the treated wastewater; the material of the anode plate is ruthenium oxide-iridium oxide, and the material of the cathode plate is carbon felt; in the wastewater treatment process, the organic contaminant is oxidized and degraded by direct electron transfer on the anode plate, and electro-catalytic oxidation is synergized with periodate to produce active species including OH · , 1 O2,O2 ·‑ ,H2O2,IO3 · and H2O2, IO3- and H2O2, which oxidize and degrade the organic contaminant in the wastewater, and the cathode plate removes part of the contaminant in the wastewater through adsorption. The application can realize efficient and low-cost treatment of wastewater containing refractory organic matter.

Description

Technical Field

[0001] This invention belongs to the field of water treatment technology and relates to a method and apparatus for electrocatalytic periodate synergistic wastewater treatment. Background Technology

[0002] With societal development, water pollution caused by wastewater from industrial production, agriculture, animal husbandry, and urban construction has become increasingly serious in recent decades. Various industries and technological advancements generate large amounts of wastewater, such as livestock wastewater, medical wastewater, and factory wastewater. This wastewater contains significant amounts of organic pollutants, which, upon entering the environment, disrupt the ecological balance and impact the home upon which humanity depends for survival.

[0003] Organic pollutants are diverse in type and complex in structure, and persist in the environment for a long time. Therefore, it is necessary to establish efficient water pollution control technologies to solve these environmental pollution problems. Advanced oxidation processes (AOPs) are one of the most promising wastewater treatment technologies, widely used for the degradation and elimination of various complex pollutants due to their high oxidative degradation efficiency. AOPs mainly remove pollutants by generating highly oxidizing active substances. Catalytic activation of oxidants to generate active substances is a common pathway for AOPs to produce active substances. Periodate (containing IO4) - Iodate salts are a common class of oxidizing agents that can be activated to produce a series of oxidizingly active substances, such as iodate radicals (IO3). · ), hydroxyl radicals ( · OH) and singlet oxygen ( 1 O2), etc. There are many activation methods for periodate, including microwave, heating, ultrasonic-assisted sludge carbon activation, and plasma glow discharge activation. However, wastewater treatment technologies based on these activation methods suffer from drawbacks such as low catalytic efficiency, complex equipment construction, and high operating costs. Therefore, developing a method to efficiently activate periodate to produce active substances is a primary task for promoting AOPs technology using periodate as an oxidant. Summary of the Invention

[0004] To address the problems of low catalytic efficiency, complex equipment construction, and high operating costs in existing methods based on the generation of active substances from activated periodate to degrade organic pollutants, this invention provides an electrocatalytic periodate-co-treated wastewater treatment method and apparatus to achieve efficient and low-cost treatment of wastewater containing recalcitrant organic matter.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] The application discloses an electro-catalytic periodate synergistic wastewater treatment method, which comprises the following steps:

[0007] The wastewater treatment device is arranged with an anode plate and a cathode plate, and the wastewater treatment device is added with organic contaminant-containing wastewater to be treated with a pH value of 3-11, and the wastewater treatment device is added with periodate, so that the concentration of the periodate in the wastewater is 0.5-2.0 mmol / L; a direct current power source connected with the anode plate and the cathode plate is started to treat the wastewater, and the treated wastewater is discharged; the material of the anode plate is ruthenium oxide-iridium oxide, and the material of the cathode plate is carbon felt.

[0008] In the wastewater treatment process, the organic contaminant is directly transferred to the anode plate to be oxidized and degraded, and the electro-catalytic synergistic periodate oxidation produces active species including OH · , 1 O2, O2 ·- , H2O2, IO3 · , which oxidize and degrade the organic contaminant in the wastewater, and the cathode plate removes part of the contaminant in the wastewater through adsorption; in the wastewater treatment process, the current density is controlled to be 5-10 mA / cm 2 , and the wastewater treatment time is controlled to be 15-30 min.

[0009] In the technical scheme of the electro-catalytic periodate synergistic wastewater treatment method, at least one anode plate and at least one cathode plate are arranged in the water treatment reactor, and each anode plate and each cathode plate are arranged in parallel and alternately, and preferably, the distance between adjacent anode plates and cathode plates is controlled to be 1-5 cm.

[0010] Further, in the technical scheme of the electro-catalytic periodate synergistic wastewater treatment method, the anode plate and the cathode plate in the water treatment reactor are arranged perpendicularly to the horizontal plane.

[0011] In the technical scheme of the electro-catalytic periodate synergistic wastewater treatment method, in order to strengthen the mass transfer efficiency in the wastewater treatment process, stirring can be applied in the wastewater treatment process, and the stirring speed is controlled to be 200-500 r / min.

[0012] In the technical scheme of the electro-catalytic periodate synergistic wastewater treatment method, the wastewater treatment time can be adjusted within the range of the wastewater treatment time defined above according to the water quality of the wastewater, and generally, the time when the target contaminant reaches or basically reaches degradation balance can be used as the wastewater treatment time.

[0013] In the technical scheme of the electro-catalytic periodate synergistic wastewater treatment method, the wastewater treatment mode can be intermittent or continuous. When the wastewater treatment mode is continuous, the wastewater treatment time refers to the hydraulic retention time of the wastewater in the wastewater treatment device provided with the anode plate and the cathode plate.

[0014] The experiment proves that the technical scheme of the electro-catalytic periodate synergistic wastewater treatment method can effectively resist the influence of the water body matrix on the degradation of organic pollutants. For example, the adverse effects of common anions such as Cl - , NO3 - , HCO3 - , SO4 2- in the water body on the degradation of organic pollutants can be overcome, and even Clˉ in the water body can strengthen the degradation capacity of organic pollutants. Therefore, in practical application, at least one of Cl - , NO3 - , HCO3 - , SO4 2- may be contained in the wastewater containing organic pollutants to be treated in the technical scheme of the electro-catalytic periodate synergistic wastewater treatment method.

[0015] In the technical scheme of the electro-catalytic periodate synergistic wastewater treatment method, the periodate is a water-soluble periodate, for example, common sodium periodate, potassium periodate, etc.

[0016] The experiment proves that the technical scheme of the electro-catalytic periodate synergistic wastewater treatment method has good degradation capacity for sulfamethoxazole (SMX), sulfisoxazole (SIZ), carbamazepine (CBZ), bisphenol A (BPA), atrazine (ATZ), nitrobenzene (NB), benzoic acid (BA) and 2,4,6-trichlorophenol (2,4,6-TCP), and especially has better degradation capacity for sulfamethoxazole (SMX), sulfisoxazole (SIZ), carbamazepine (CBZ), bisphenol A (BPA), atrazine (ATZ) and nitrobenzene (NB). Therefore, in the technical scheme of the electro-catalytic periodate synergistic wastewater treatment method, the organic pollutants in the wastewater containing organic pollutants to be treated can include at least one of sulfamethoxazole, sulfisoxazole, carbamazepine, bisphenol A, atrazine and nitrobenzene, and of course, the wastewater containing organic pollutants can also include organic pollutants that are more easily oxidized and degraded.

[0017] The application also provides a device for implementing the electro-catalytic periodate synergistic wastewater treatment method, but the device for implementing the wastewater treatment method is not limited to the following structure. The following structure is only one of many devices that can implement the wastewater treatment method.

[0018] A wastewater treatment device for electro-catalytic high iodate salt synergistic wastewater treatment method, comprising a power supply device, a water treatment reaction cabin, a high iodate salt dosing device;

[0019] The power supply device comprises a direct current power supply; the high iodate salt dosing device comprises a dosing pump and a medicament storage tank;

[0020] The water treatment reaction cabin comprises a reaction cabin shell, an upper cover, a stirring device, a plurality of anode plates and a plurality of cathode plates, the reaction cabin shell and the upper cover are not conductive; the reaction cabin shell is a cylinder with an open upper end, the upper part of the reaction cabin shell is provided with a water inlet, a medicament dosing port and a wire outlet, the lower part of the reaction cabin shell is provided with a water outlet and a stirring paddle extension inlet; the upper cover is installed on the open end of the reaction cabin shell to seal the reaction cabin shell; the anode plates and the cathode plates are arranged in the reaction cabin shell in a manner perpendicular to the horizontal plane, each anode plate and each cathode plate are parallel to each other and arranged alternately; the stirring device comprises a stirring paddle in the reaction cabin shell and a stirring motor outside the reaction cabin shell for driving the stirring paddle to rotate, the stirring paddle is located below the anode plates and the cathode plates; the material of the anode plates is ruthenium oxide-iridium oxide, and the material of the cathode plates is carbon felt;

[0021] The anode plates and the cathode plates are connected with the anode and the cathode of the direct current power supply respectively, the medicament storage tank is communicated with the medicament dosing port through the pipe and the dosing pump, and the water treatment reaction cabin is supported by a support in a state perpendicular to the horizontal plane.

[0022] In the technical scheme of the above wastewater treatment device, the height of the anode plates and the cathode plates is 40% to 60% of the height of the water treatment reaction cabin, and the anode plates and the cathode plates are arranged in the middle part of the reaction cabin shell.

[0023] In the technical scheme of the above wastewater treatment device, the width of the anode plates and the cathode plates is 50% to 70% of the diameter of the water treatment reaction cabin.

[0024] In the technical scheme of the above wastewater treatment device, the distance between adjacent anode plates and cathode plates is 1 to 5 cm.

[0025] In the technical scheme of the above wastewater treatment device, a conductive fixing ring is further fixedly arranged in the reaction cabin shell, the conductive fixing ring comprises anode plate conductive fixing rings and cathode plate conductive fixing rings, the anode plate conductive fixing rings and the cathode plate conductive fixing rings are connected with the anode and the cathode of the direct current power supply through wires respectively, each anode plate is fixed in the reaction cabin shell through the anode plate conductive fixing rings, and each cathode plate is fixed in the reaction cabin shell through the cathode plate conductive fixing rings; the anode plate conductive fixing rings and the cathode plate conductive fixing rings do not contact each other.

[0026] In the above-mentioned wastewater treatment device, the power supply device further includes an integrated circuit computer, and the DC power supply is controlled by the integrated circuit computer to provide controllable electrical energy to the anode plate and cathode plate; the periodate dosing device further includes a computer control terminal, and the dosing pump is controlled by the computer control terminal to regulate the reagent dosing rate.

[0027] The mechanism of the above-mentioned electrocatalytic periodate synergistic wastewater treatment method provided by the present invention is mainly as follows:

[0028] The above technical solution mainly utilizes the synergistic effect of electrocatalysis and periodate activation reaction to achieve a highly efficient catalytic oxidation effect. The synergistic effect includes the direct oxidation of organic pollutants on the electrode surface and the indirect oxidation by reactive species generated from electrocatalytic activation of periodate. Direct oxidation refers to the direct transfer of electrons between organic pollutants and the anode plate, thereby destroying the molecular structure of the organic pollutants and achieving oxidation and elimination. Indirect oxidation involves a series of electrocatalytic reactions that convert periodate into a series of highly oxidizing reactive species, specifically including hydroxyl radicals (OH-). · ), iodate radicals (IO3) · ), superoxide radicals (O2) ·- ), singlet oxygen ( 1 O2) and hydrogen peroxide (H2O2), these active species can efficiently oxidize and degrade organic pollutants in wastewater. The indirect oxidation mainly occurs at the cathode, where the high specific surface area of ​​the cathode plate (plate-type carbon felt electrode) allows for the efficient oxidative degradation of periodate (IO4). - IO4 readily adsorbs onto the cathode plate, accepts electrons on the surface of the cathode plate, and undergoes a series of electrocatalytic reduction reactions. - A single electron transfer reaction occurs on the cathode plate to generate periodate radicals (IO3). · (Equation 1), IO4 - Hydroxyl radicals (OH-) can also be generated through a two-electron transfer reaction. · (Equation 2) Simultaneously, in the electrocatalytic system, an oxygen reduction reaction occurs near the cathode plate to produce hydrogen peroxide (H2O2) in situ (Equation 3). The participation of H2O2 can make an important contribution to the generation of active substances in the system, because H2O2 can react with IO4-. - The reaction then produces OH · (Equations 4-5) and singlet oxygen ( 1 O2)(Formula 6). In addition, the cathode plate can also remove some pollutants from wastewater through adsorption.

[0029]

[0030]

[0031] O2 + 2H + +2e - →H2O2 (Equation 3)

[0032]

[0033]

[0034]

[0035] The combined effect of electrocatalysis and the oxidation of the aforementioned active species generated by electrocatalytic activation of periodate can effectively improve the electron transfer efficiency and mass transfer efficiency of reactants in the water matrix, greatly promoting the removal of various organic pollutants from wastewater.

[0036] Compared with the prior art, the technical solution of the present invention has the following beneficial technical effects:

[0037] 1. This invention provides a method for the synergistic treatment of wastewater by electrocatalysis and periodate. The main technology and concept lie in utilizing the synergistic effect of electrocatalysis and the electrocatalytic activation of periodate to produce a highly efficient catalytic oxidation effect. This synergistic effect includes the direct oxidation of organic pollutants on the electrode surface (electrocatalysis) and the indirect oxidation by active species generated from the electrocatalytic activation of periodate. Direct oxidation refers to the direct transfer of electrons to organic pollutants on the anode plate, resulting in their oxidative degradation. Indirect oxidation involves a series of electrocatalytic reactions that convert periodate into hydroxyl radicals (OH-). · ), iodate radicals (IO3) · ), superoxide radicals (O2) ·- ), singlet oxygen ( 1 Highly oxidizing reactive species, including O2 and hydrogen peroxide (H2O2), are used to efficiently oxidize and degrade organic pollutants in wastewater. The synergistic effect of electrocatalysis and the oxidation of these reactive species effectively improves the electron transfer efficiency and mass transfer efficiency of reactants in the aqueous matrix, greatly promoting the removal of various organic pollutants from wastewater. Furthermore, the method of this invention is powered by electricity, a clean energy source, and the substances produced after the reaction from periodate are non-toxic. Therefore, the method of this invention is an environmentally friendly water treatment technology with high pollutant oxidation and degradation efficiency.

[0038] 2.The method has good stability in degrading organic pollutants, and has good degradation efficiency for refractory organic matters such as sulfamethoxazole (SMX), sulfisoxazole (ATZ), carbamazepine (CBZ), bisphenol A (BPA), atrazine (ATZ), nitrobenzene (NB), benzoic acid (BA) and 2, 4, 6-trichlorophenol (2, 4, 6-TCP), etc. In addition, the method has the advantages of energy saving and high efficiency through energy consumption calculation (EE / O).

[0039] 3.The method has satisfactory degradation efficiency for organic pollutants in different anion-influenced environments, and has strong tolerance to coexisting anions in wastewater, such as Cl - , NO3 - , HCO3 - , SO4 2- , etc., and can adapt to different water qualities to efficiently degrade various pollutants.

[0040] 4.The wastewater treatment device for implementing the above method has simple structure, only including a power supply device, a water treatment reaction cabin and a periodate dosing device, so that the operation cost is low, the controllability is high, and the maintenance is convenient. Meanwhile, the wastewater treatment device can be designed as an integrated structure in practical application, has the advantage of small occupied area, and can be applied to remote mountainous areas with complex terrain and inconvenient transportation and rural areas with poor water pollution treatment conditions. Meanwhile, the wastewater treatment device does not include other physical and chemical treatment devices, such as waste pulverizer and sedimentation tank, so that it has small noise and no odor, has small influence on the surrounding environment, and can be applied to cities, such as hospitals and residential areas, to treat hospital wastewater and urban domestic wastewater. The wastewater treatment device can realize in-situ treatment of wastewater, reduces the transportation cost of wastewater and the risk of environmental pollution caused by harmful substances in the transportation process. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a structural schematic diagram of the electro-catalytic periodate synergistic wastewater treatment device.

[0042] Figure 2 is a structural schematic diagram of the power supply device in example 1.

[0043] Figure 3 is a structural schematic diagram of the periodate dosing device in example 1.

[0044] Figure 4 is an external structural schematic diagram of the water treatment reaction cabin in example 1.

[0045] Figure 5 FIG. 1 is a schematic diagram of the installation of the anode plate and the cathode plate in the water treatment reaction chamber in Example 1.

[0046] Figure 6 FIG. 5 is a schematic diagram of the connection of the anode plate and the cathode plate in Example 1 to the direct current power supply through the conductive fixing ring via the wire.

[0047] Figures 1-6 In the figure, 1 - power supply device, 1-1 - direct current power supply, 1-2 - integrated circuit computer, 1-3 - power supply box body, 1-4 - box body door, 1-5 - observation window, 2 - water treatment reaction chamber, 2-1 - reaction chamber shell, 2-1-1 - water inlet, 2-1-2 - reagent adding port, 2-1-3 - wire inlet and outlet, 2-1-4 - water outlet, 2-1-5 - stirring paddle extension inlet, 2-2 - upper cover, 2-3-1 - stirring paddle, 2-3-2 - stirring motor, 2-4 - anode plate, 2-5 - cathode plate, 2-6 - conductive fixing ring, 2-7 - newborn floc discharge pipe, 2-8 - second hollow sphere flocculation unit, 2-9 - reagent adding port, 3 - high iodate adding device, 3-1 - adding pump, 3-2 - reagent storage tank, 3-3 - computer control terminal, 3-4 - stirrer, 4 - support.

[0048] Figure 7 FIG. 6 is a C / C0 curve of SMX over time in Example 2 and Comparative Examples 1 to 3.

[0049] Figure 8 FIG. 7 is a pollutant degradation curve under different coexisting anion conditions in Example 3.

[0050] Figure 9 FIG. 8 is a pollutant degradation curve of Example 4 using cathode plates of different materials (graphite, carbon felt, stainless steel).

[0051] Figure 10 FIG. 9 is a scanning electron microscope image of the cathode plates of different materials (graphite, carbon felt, stainless steel) used in Example 4.

[0052] Figure 11 FIG. 10 is the test result of the degradation efficiency of different organic pollutants in Example 5 and Comparative Example 4.

[0053] Figure 12 FIG. 11 is the test result of the influence of the addition of different quenching agents on the degradation of organic pollutants and the contribution degree of different oxidative active species to the degradation of organic pollutants in Example 6.

[0054] Figure 13 FIG. 12 is an EE / O value graph of the degradation of different pollutants in Example 7.

[0055] Figure 14 FIG. 13 is a schematic diagram of the mechanism of the degradation of SMX by the method of the present application. ​​​​​​​​​​DETAILED DESCRIPTION

[0056] The electro-catalytic periodate synergistic wastewater treatment method and device provided by the present application are further described by the following examples. It is necessary to point out that the following examples are only used to further describe the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above description, which still belongs to the protection scope of the present application.

[0057] Example 1

[0058] In this embodiment, the structure of the electro-catalytic periodate synergistic wastewater treatment device is provided.

[0059] The structure schematic diagram of the electro-catalytic periodate synergistic wastewater treatment device described in this embodiment is shown in Figure 1 which includes a power supply device 1, a water treatment reaction cabin 2 and a periodate dosing device 3.

[0060] Figure 2 is a structure schematic diagram of the power supply device, the power supply device 1 includes a direct current power supply 1-1, an integrated circuit computer 1-2, a power supply box body 1-3 for accommodating the direct current power supply 1-1 and the integrated circuit computer 1-2, the integrated circuit computer 1-2 is provided with a display screen, the power supply box body is provided with an openable box body door 1-4, and the box body door 1-4 is provided with an observation window 1-5 for observing the display screen of the integrated circuit computer; the direct current power supply 1-1 is controlled by the integrated circuit computer 1-2 to provide controllable power energy for the anode plate and the cathode plate.

[0061] Figure 3 is a structure schematic diagram of the periodate dosing device, the periodate dosing device 3 includes a dosing pump 3-1, a medicament storage tank 3-2, a computer control terminal 3-3 and a stirrer 3-4, the medicament storage tank is used for containing a periodate solution, the stirrer is communicated with the medicament storage tank and is used for stirring the medicament solution contained in the medicament storage tank, and the dosing pump 3-1 is a hydraulic vacuum pump, and the dosing pump 3-1 is controlled by the computer control terminal 3-3 to control the dosing speed of the periodate.

[0062] Figure 4 is an external structure schematic diagram of the water treatment reaction cabin, Figure 5is a schematic diagram of the installation of anode plates and cathode plates in a water treatment reaction chamber. The water treatment reaction chamber 2 comprises a reaction chamber shell 2-1, an upper cover 2-2, a stirring device, a plurality of anode plates 2-4 and a plurality of cathode plates 2-5, and further comprises a conductive fixing ring 2-6. The reaction chamber shell 2-1 and the upper cover 2-2 are not conductive, which is achieved by providing an insulating layer on the inner wall of the reaction chamber shell and on the inner wall of the upper cover. The reaction chamber shell 2-1 is a cylindrical body with an open upper end. The upper part of the reaction chamber shell 2-1 is provided with a water inlet 2-1-1, a reagent adding port 2-1-2, and a wire outlet 2-1-3. The lower part of the reaction chamber shell 2-1 is provided with a water outlet 2-1-4 and a stirring paddle access port 2-1-5. The upper cover 2-2 is installed on the open end of the reaction chamber shell 2-1 by flange fixation to seal the reaction chamber shell. The anode plates 2-4 and the cathode plates 2-5 are arranged in the reaction chamber shell 2-1 in a manner perpendicular to the horizontal plane. Each anode plate 2-4 and each cathode plate 2-5 are parallel to each other and arranged alternately. The stirring device comprises a stirring paddle 2-3-1 located inside the reaction chamber shell 2-1 and a stirring motor 2-3-2 located outside the reaction chamber shell 2-1 for driving the stirring paddle to rotate. The stirring paddle 2-3-1 is located below the anode plates and the cathode plates. During wastewater treatment, the stirring motor 2-3-2 for driving the stirring paddle to rotate can be turned on according to actual needs to drive the stirring paddle 2-3-1 to rotate to apply stirring to the water in the water treatment reaction chamber. The application of stirring can strengthen the mass transfer process and is beneficial to improving the water treatment efficiency.

[0063] More specifically: the material of the anode plates 2-5 is ruthenium oxide-iridium oxide, and the material of the cathode plates 2-6 is carbon felt. The reaction chamber shell 2-1 includes five identical anode plates and five identical cathode plates. The height of the anode plates 2-5 and the cathode plates 2-6 is 60% of the height of the water treatment reaction chamber 2, and the anode plates 2-5 and the cathode plates 2-6 are arranged in the middle of the reaction chamber shell 2-1. The width of the anode plates 2-5 and the cathode plates 2-6 is 60% of the diameter of the water treatment reaction chamber 2. The distance between adjacent anode plates and cathode plates is 1.5 cm. The reaction chamber shell 2-1 is also fixedly provided with a conductive fixing ring 2-6, which includes an anode plate conductive fixing ring and a cathode plate conductive fixing ring. The anode plate conductive fixing ring is connected to the anode of the direct current power supply 1-1 through wires, and the cathode plate conductive fixing ring is connected to the cathode of the direct current power supply 1-1 through wires. The wires pass through the wire outlet 2-1-3 on the reaction chamber shell 2-1 to connect with the direct current power supply. Each anode plate 2-5 is fixed in the reaction chamber shell 2-1 through the anode plate conductive fixing ring, and each cathode plate 2-6 is fixed in the reaction chamber shell 2-1 through the cathode plate conductive fixing ring. The anode plate conductive fixing ring and the cathode plate conductive fixing ring do not contact each other. A schematic diagram of the connection of the anode plates and the cathode plates to the direct current power supply through the conductive fixing ring is shown in Figure 6 .

[0064] The medicament storage tank 3-2 is in communication with the medicament dosing port 2-1-2 through a pipe and a dosing pump 3-1, and the water treatment reaction chamber 2 is supported by a support 4 connected to the outer wall of the reaction chamber shell 2-1 in a state perpendicular to the horizontal plane.

[0065] Example 2

[0066] In this example, the electro-catalytic periodate synergistic wastewater treatment method according to the present application is provided, which uses the electro-catalytic periodate synergistic wastewater treatment device according to Example 1, and the details are as follows:

[0067] A commonly used antibiotic, sulfamethoxazole (SMX), is used as the target pollutant, and a SMX simulated wastewater with a SMX concentration of 2 mg / L is prepared, and the pH value of the simulated wastewater is 7.4. The SMX simulated wastewater is completely submerged in the anode plate and the cathode plate in the water treatment reaction chamber of the electro-catalytic periodate synergistic wastewater treatment device, the sodium periodate solution stored in the medicament storage tank is dosed into the water treatment reaction chamber through the periodate dosing device, the concentration of sodium periodate in the wastewater is adjusted to 1.0 mmol / L, the direct current power source connected to the anode plate and the cathode plate is started to treat the wastewater, and after the wastewater treatment is completed, the treated wastewater is discharged from the water outlet. During the wastewater treatment process, the stirring speed is controlled at 400 r / min, the current density is controlled at 7.78 mA / cm 2 , and the wastewater is sampled from the water treatment reaction chamber every 2-5 min for water quality detection, the ratio of the SMX concentration (C) at the corresponding time to the initial SMX concentration (C0) is calculated, and the C / C0 curve of SMX with time is drawn, as shown in the "EC / PI" group curve in Figure 7 . The percentage number above each group curve in Figure 7 represents the degradation efficiency when the degradation reaches equilibrium, and the degradation efficiency = (C0-C) / C0 x 100%.

[0068] Comparative Example 1

[0069] The operation of this comparative example is basically the same as that of Example 2, except that the electro-catalytic periodate synergistic wastewater treatment device does not have an anode plate and a cathode plate, and only sodium periodate is used for wastewater treatment. In this comparative example, the C / C0 curve of SMX with time is shown in the "PI alone" group curve in Figure 7 .

[0070] Comparative Example 2

[0071] The operation of this comparative example is basically the same as that of Example 2, except that no sodium periodate solution is dosed, and only electro-catalysis is used for wastewater treatment. In this comparative example, the C / C0 curve of SMX with time is shown in the "EC alone" group curve in Figure 7as shown in the "single EC system" group curve in FIG. 1.

[0072] Comparative Example 3

[0073] The operation of the present comparative example is basically the same as that of Example 2, except that the direct current power source connected to the anode plate and the cathode plate is not started, and the adsorption of the cathode plate and sodium periodate are used for wastewater treatment. In the present comparative example, the C / C0 curve of SMX over time is shown in FIG. 2. Figure 7 as shown in the "CF / PI" group curve in FIG. 1.

[0074] It can be seen from Examples 2 and Comparative Examples 1-3 that the degradation efficiency of SMX in Comparative Example 1 is only 5.2% when SMX reaches degradation equilibrium; the degradation efficiency of SMX in Comparative Example 2 is only 16.2% when SMX reaches degradation equilibrium; the degradation efficiency of SMX in Comparative Example 3 is 32% when SMX reaches degradation equilibrium; it is shown that the degradation ability of high iodate alone and electro-catalysis alone on SMX is very limited, and the adsorption removal ability of the cathode plate on SMX is also relatively limited, which cannot achieve efficient removal of SMX. In Example 2, SMX can reach degradation equilibrium in 15 min, and the degradation efficiency of SMX reaches 100%. It is shown that electro-catalysis and high iodate oxidation have a strong synergistic effect on the degradation of pollutants, can efficiently degrade refractory organic matter, and can effectively solve the problem of organic pollution in water environment.

[0075] Example 3

[0076] In the present example, the influence of different anions (Cl - , NO3 - , HCO3 - , SO4 2- ) on the degradation ability of pollutants by the method described in the present application is investigated.

[0077] The actual wastewater system is relatively complex, and various anions exist therein, which can have an adverse effect on some links in the wastewater treatment process. Therefore, the influence of different anions (Cl - , NO3 - , HCO3 - , SO4 2- ) on the degradation ability of pollutants by the method described in the present application under the common anion concentration conditions in the actual wastewater is explored.

[0078] A commonly used antibiotic, sulfamethoxazole (SMX), is used as a target pollutant to prepare an SMX solution, and then different concentrations of anions are added to the SMX solution to obtain simulated wastewater containing different concentrations and different types of anions, as follows:

[0079] The simulated wastewater containing Cl- is prepared: each contains Cl- In simulated wastewater, Cl - The concentrations of the simulated wastewater were 0, 1, 3, 5, and 10 mmol / L, respectively, and the concentration of SMX was 2 mg / L. The pH value of the simulated wastewater was 7.4.

[0080] Formulating NO3 - Simulated wastewater: each containing NO3 - In simulated wastewater, NO3 - The concentrations of the simulated wastewater were 0, 1, 3, 5, and 10 mmol / L, respectively, and the concentration of SMX was 2 mg / L. The pH value of the simulated wastewater was 7.4.

[0081] Preparation containing HCO3 - Simulated wastewater: each containing HCO3 - In the simulated wastewater, HCO3 - The concentrations of the simulated wastewater were 0, 1, 3, 5, and 10 mmol / L, respectively, and the concentration of SMX was 2 mg / L. The pH value of the simulated wastewater was 7.4.

[0082] Preparation containing SO4 2- Simulated wastewater: each containing SO4 2- In the simulated wastewater, SO4 2- The concentrations of the simulated wastewater were 0, 1, 3, 5, and 10 mmol / L, respectively, and the concentration of SMX was 2 mg / L. The pH value of the simulated wastewater was 7.4.

[0083] The simulated wastewater was fed into the water treatment reaction chamber of the electrocatalytic periodate synergistic wastewater treatment device described in Example 1. Sodium periodate solution stored in the reagent storage tank was added to the reaction chamber via a periodate dosing device, completely submerging the anode and cathode plates. The concentration of sodium periodate in the wastewater was adjusted to 1 mmol / L. The DC power supply connected to the anode and cathode plates was then activated to treat the wastewater. After treatment, the treated wastewater was discharged from the outlet. During the wastewater treatment process, the current density was controlled at 7.78 mA / cm². 2 Water samples were taken from the water treatment reaction chamber every 2–5 minutes for water quality testing. The ratio of the SMX concentration (C) at the corresponding treatment time to the initial SMX concentration (C0) was calculated, and the C / C0 curve of SMX over time was plotted. Figure 8 As shown.

[0084] Figure 8 The diagrams a through d represent the effects of the above-mentioned substances containing Cl, respectively. - NO3 - HCO3 - or SO4 2-The curves showing the C / CO ratio of SMX over time during the treatment of simulated wastewater are shown. "No addition" indicates that the simulated wastewater contains only SMX and no anions. Figure 8 As shown in Figure a, in Cl - Under coexistence conditions, when Cl in the simulated wastewater - When the concentration reaches 10 mmol / L, it promotes the degradation efficiency of SMX, which should be due to the active substances generated during the wastewater degradation process, such as... · OH and SO4 ·- Able to interact with Cl - The reaction produces other reactive chlorine substances, which can also oxidize and degrade organic pollutants. Figure 8 As shown in Figure b, in NO3 - Under conditions of coexistence, with NO3 - With increasing concentration, the degradation efficiency of SMX was only slightly inhibited, but the degradation efficiency of SMX could still reach 90% to 95%, indicating that the degradation efficiency of the method of the present invention is not significantly affected by NO3. - The impact is minimal. Figure 8 As shown in graph c, low concentrations of HCO3 - (1 mmol / L) had a slight inhibitory effect on the degradation of SMX, but the degradation efficiency of SMX could still reach close to 90%. - As the concentration increases, its inhibitory effect on SMX degradation decreases, indicating that the degradation efficiency of the method of this invention for pollutants is affected by HCO3. - The impact is also relatively small. Figure 8 As can be seen from the d-graph, in SO4 2- Under coexisting conditions, when SMX reaches degradation equilibrium (treatment time reaches 15 min), the degradation efficiency of SMX can reach 100%, indicating that the degradation efficiency of the method of the present invention for pollutants is affected by SO4. 2- The impact is also very small.

[0085] From the above experimental results, it can be seen that Cl - NO3 - HCO3 - SO4 2- The coexistence of these common anions, within the actual concentration range of water bodies, has little or no significant impact on the pollutant removal ability of the method described in this invention, indicating that the method of this invention has good adaptability to complex water bodies and can exhibit stable organic pollutant degradation ability under various water qualities.

[0086] Example 4

[0087] In this embodiment, the effects of cathode plates made of different materials (graphite, carbon felt, stainless steel) on the ability of the electrocatalytic periodate co-treatment method to degrade pollutants were investigated.

[0088] Using the commonly used antibiotic sulfamethoxazole (SMX) as the target pollutant, a simulated wastewater with an SMX concentration of 2 mg / L and a pH of 7.4 was prepared. Three experimental groups were conducted according to the following procedures:

[0089] Experimental Group 1: SMX simulated wastewater was introduced into the water treatment reaction chamber of the electrocatalytic periodate synergistic wastewater treatment device described in Example 1, completely submerging the anode and cathode plates. Sodium periodate solution stored in the reagent storage tank was added to the water treatment reaction chamber via the periodate dosing device to adjust the sodium periodate concentration in the wastewater to 1 mmol / L. The DC power supply connected to the anode and cathode plates was then activated for wastewater treatment. After treatment, the treated wastewater was discharged from the outlet. During the wastewater treatment process, the current density was controlled at 7.78 mA / cm². 2 Every 2–5 minutes, samples were taken from the water treatment reaction chamber for water quality testing. The ratio of the SMX concentration (C) at the corresponding treatment time to the initial SMX concentration (C0) was calculated, and the C / C0 curve of SMX over time was plotted. Since the cathode plate used in the electrocatalytic periodate co-treatment wastewater treatment device described in Example 1 is made of carbon felt, the results of this experimental group are as follows: Figure 9 The curves for the "carbon felt electrode" group are shown in the figure.

[0090] Experimental Group 2: The operation of this experimental group was basically the same as that of Experimental Group 1, except that the cathode plate used in the electrocatalytic periodate co-treatment wastewater device described in Example 1 was replaced with graphite. The results of this experimental group are as follows: Figure 9 The curves of the "graphite plate electrode" group are shown in the figure.

[0091] Experimental Group 3: The operation of this experimental group was basically the same as that of Experimental Group 1, except that the cathode plate used in the electrocatalytic periodate co-treatment wastewater device described in Example 1 was replaced with stainless steel. The results of this experimental group are as follows: Figure 9 The curves for the "stainless steel electrode" group are shown in the figure.

[0092] Depend on Figure 9It can be seen that, within 15 min of reaction time, the degradation efficiency of SMX is less than 45% when the material of the cathode plate is graphite and stainless steel, indicating that the electrocatalytic system composed of the two materials of the cathode plate and the RuO2-IrO2 anode plate does not exhibit good degradation synergistic effect. The degradation efficiency of the electrocatalytic system composed of the carbon felt material of the cathode plate and the RuO2-IrO2 anode plate reaches 100%, indicating that the two can exhibit excellent synergistic degradation effect in the electrocatalytic system. This may be due to the fact that the carbon felt material of the cathode plate has good electrical conductivity and a unique three-dimensional spatial structure, as shown in Figure 10 , the three-dimensional spatial structure of the carbon felt material of the cathode plate is conducive to more effectively capturing periodate in water and making it activated to produce a large number of abundant oxidative active species.

[0093] Example 5

[0094] In this embodiment, the ability of the method of the present application to degrade different organic pollutants is investigated.

[0095] The degradation of common organic pollutants in the environment is taken as the target pollutants, specifically including sulfamethoxazole (SMX), sulfisoxazole (SIZ), carbamazepine (CBZ), bisphenol A (BPA), atrazine (ATZ), nitrobenzene (NB), benzoic acid (BA) and 2,4,6-trichlorophenol (2,4,6-TCP). Each target pollutant is dissolved in water to prepare simulated wastewater with a target pollutant concentration of 2 mg / L and a pH value of 7.4.

[0096] The above simulated wastewater is respectively introduced into the water treatment reaction cabin of the electrocatalytic periodate synergistic wastewater treatment device described in Example 1, completely submerging the anode plate and the cathode plate, and the sodium periodate solution stored in the reagent storage tank is added to the water treatment reaction cabin through the sodium periodate dosing device to adjust the concentration of sodium periodate in the wastewater to 1 mmol / L, and the direct current power source connected with the anode plate and the cathode plate is started to treat the wastewater, and after the wastewater treatment is completed, the treated wastewater is discharged from the water outlet. During the wastewater treatment process, the current density is controlled to be 7.78 mA / cm 2 , and the water quality is detected by sampling from the water treatment reaction cabin every 2-5 min, the ratio of the pollutant concentration (C) at the corresponding time to the initial pollutant concentration (C0) is calculated, and the C / C0 curve of each pollutant with time, i.e. the change curve of the degradation efficiency of each pollutant with time, is drawn, as shown in the “EC / PI system” group data in Figure 11 .

[0097] Comparative Example 4

[0098] The operation of this comparative example is basically the same as that of Example 5, except that sodium periodate solution is not added to the water treatment reaction chamber. The C / CO ratio curves of each pollutant over time, i.e., the degradation efficiency curves of each pollutant over time, are plotted, as shown below. Figure 11 The data is shown in the "Individual EC System" group.

[0099] Based on Example 5 and Comparative Example 4, it can be seen that the electrocatalytic periodate synergistic activation system used in Example 5 can achieve a degradation efficiency of over 65% for sulfamethoxazole (SMX), sulfisoxazole (SIZ), carbamazepine (CBZ), bisphenol A (BPA), atrazine (ATZ), nitrobenzene (NB), benzoic acid (BA), and 2,4,6-trichlorophenol (2,4,6-TCP). In particular, the degradation efficiency for sulfamethoxazole (SMX) can reach 100%, the degradation efficiency for sulfisoxazole (SIZ) and carbamazepine (CBZ) can reach over 90%, and the degradation efficiency for bisphenol A (BPA), atrazine (ATZ), and nitrobenzene (NB) can reach over 80%. In Comparative Example 4, the degradation efficiency of sulfamethoxazole (SMX), sulfaisoxazole (SIZ), carbamazepine (CBZ), bisphenol A (BPA), atrazine (ATZ), benzoic acid (BA), and 2,4,6-trichlorophenol (2,4,6-TCP) using a single electrocatalytic system did not exceed 40%, and even the degradation efficiency of nitrobenzene (NB), which showed the best degradation effect, did not exceed 60%. These experimental results demonstrate that the method of the present invention has strong oxidative synergy and good universality in the degradation of various organic pollutants, and can be used to treat wastewater containing different organic pollutants.

[0100] Example 6

[0101] In this embodiment, the oxidation mechanism of the method described in this invention and the degree of oxidation contribution of active species are examined.

[0102] Free radical scavenging experiments utilize free radical scavengers to inhibit the contribution of free radical reactive substances to the oxidation of organic pollutants, thereby inferring the degree of contribution of these reactive substances in the oxidation of pollutants. Because free radical scavengers have a certain specificity for reactive substances, the use of multiple free radical scavengers allows for the study of various reactive substances and complex oxidation mechanisms contained in the system.

[0103] tert-Butanol (TBA) and hydroxyl radicals (OH) · The two reactions exhibit high reactivity (reaction rate constant is 7.6 × 10⁻⁶). 8 M -1 s -1 It can effectively quench OH in the system. · The oxidation of furfuryl alcohol (FFA) and singlet oxygen (… 1O2) between them has high reactivity (reaction rate constant is 1.2 x 10 7 M -1 s -1 ), which can effectively quench the oxidation of O2 1 O2between superoxide dismutase (SOD) and superoxide free radical (O2 ·- ) has high reactivity (reaction rate constant is 2.0 x 10 9 M -1 s -1 ), which can effectively quench O2 ·- . Catalase (CAT) has high reactivity with H2O2 (reaction rate constant is 7.9 x 10 6 M -1 s -1 ), which can effectively quench H2O2. Phenol has high reaction rate with OH · and IO3 · .

[0104] With the commonly used antibiotic sulfamethoxazole (SMX) as the target pollutant, SMX simulated wastewater with a concentration of 2 mg / L was prepared, and the pH value of the simulated wastewater was 7.4. In the following experimental process, TBA, FFA, SOD, CAT, SOD+CAT and phenol were used as quenching agents, and the addition amounts of each quenching agent in the simulated wastewater were as follows: TBA 100 mmol / L, FFA 1 mmol / L, SOD 30 U / mL, CAT 500 U / mL, SOD+CAT 30 U / mL+500 U / mL, and phenol 1 mmol / L.

[0105] The SMX simulated wastewater was introduced into the water treatment reaction cabin of the electro-catalytic periodate synergistic wastewater treatment device described in Example 1, completely submerging the anode plate and the cathode plate. Sodium periodate solution stored in the reagent storage tank was added to the water treatment reaction cabin through the sodium periodate dosing device, and the concentration of sodium periodate in the wastewater was adjusted to 1 mmol / L. Different quenching agents were added according to the above-mentioned addition amounts, and the direct current power source connected to the anode plate and the cathode plate was started to treat the wastewater. After the wastewater treatment was completed, the treated wastewater was discharged from the water outlet. During the wastewater treatment process, the current density was controlled at 7.78 mA / cm 2 , and samples were taken from the water treatment reaction cabin every 2-5 min for water quality detection. The ratio of the SMX concentration (C) at the corresponding time to the initial SMX concentration (C0) was calculated, and the C / C0 curve of SMX with time was drawn. The case without adding any quenching agent was taken as a control, and the results are shown in Figure 12As shown in Figure a. Simultaneously, water samples were taken from the water treatment reaction chamber after 15 minutes of degradation for water quality testing. The degradation efficiency of SMX was calculated when different quenchers were added within the same time period. The results are shown in Figure a. Figure 12 As shown in Figure b.

[0106] Depend on Figure 12 It can be seen that the addition of TBA significantly inhibited the degradation efficiency of SMX, with an inhibition rate of 50.9%. This indicates that OH... · The presence of FFA in the system and its role in the degradation of organic pollutants play an important role. Similarly, the addition of FFA significantly inhibited the degradation efficiency of SMX, with an inhibition rate of 52.3%, indicating that... 1 The presence of O2 in the system plays a crucial role in the degradation of organic pollutants. The addition of SOD and CAT also has a certain inhibitory effect on the degradation efficiency of SMX, but the inhibitory effect is not as significant as that of TBA and FFA, indicating that O2... ·- H₂O₂ acts as a reaction intermediate in the free radical reaction process, contributing a relatively weak degree to the degradation of organic pollutants. Meanwhile, the addition of phenol significantly inhibited the degradation efficiency of SMX, with an inhibition rate of 81.3%, indicating that OH⁻... · and IO3 · All of them made a significant contribution to the degradation of organic pollutants.

[0107] Example 7

[0108] To verify the low-energy advantage of the electrocatalytic synergistic periodate activation system during operation, the energy efficiency (EE / O) ratios of different pollutants, including sulfamethoxazole (SMX), sulfaisoxazole (ATZ), carbamazepine (CBZ), bisphenol A (BPA), atrazine (ATZ), nitrobenzene (NB), benzoic acid (BA), and 2,4,6-trichlorophenol (2,4,6-TCP), were calculated. The results are as follows: Figure 13 As shown. The formula for calculating EE / O is as follows:

[0109]

[0110] Where P is the total electrical energy (kW), t is the reaction time, V is the volume of the reaction system (L), C0 is the initial target pollutant concentration, and C t k represents the concentration of the target pollutant at reaction time t. obs The first-order apparent rate constant (min) -1 ).

[0111] Depend on Figure 13It can be seen that the energy consumption required for the degradation of different types of pollutants by the electrocatalysis synergistic periodate activation system is low, and the energy consumption required for the degradation of SMX is the lowest, and the EE / O value is 0.19 kWh / m 3 .

[0112] According to the above experimental results, the method of the present application utilizes electrocatalysis synergistic periodate to generate various oxidative active species including OH · , 1 O2, O2 ·- , H2O2, IO3 · , and constitutes a multiple oxidation mechanism. The mechanism of the method of the present application for degrading SMX is shown in Figure 14 . The method of the present application can cope with different types of organic pollutants and actual water pollution environments, and has the characteristics of high efficiency, high energy and good universality.

[0113] Example 8

[0114] In this embodiment, the electrocatalysis periodate synergistic wastewater treatment method of the present application is provided. The electrocatalysis periodate synergistic wastewater treatment device used in the method is basically the same as that in Example 1, except that the reaction cabin shell 2-1 includes four identical anode plates and four identical cathode plates. The height of the anode plate 2-5 and the cathode plate 2-6 is 50% of the height of the water treatment reaction cabin 2, and the anode plate 2-5 and the cathode plate 2-6 are arranged in the middle of the reaction cabin shell 2-1. The width of the anode plate 2-5 and the cathode plate 2-6 is 50% of the diameter of the water treatment reaction cabin 2. The distance between adjacent anode plates and cathode plates is 5 cm. The specific operation is as follows:

[0115] SMX is used as the target pollutant, and SMX simulated wastewater with a SMX concentration of 5 mg / L is prepared. The pH value of the simulated wastewater is 3. The SMX simulated wastewater is completely submerged in the anode plate and the cathode plate in the water treatment reaction cabin of the electrocatalysis periodate synergistic wastewater treatment device, and the sodium periodate solution stored in the reagent storage tank is added to the water treatment reaction cabin through the sodium periodate adding device to adjust the concentration of sodium periodate in the wastewater to 2.0 mmol / L. The wastewater treatment is started by starting the direct current power source connected to the anode plate and the cathode plate, and after the wastewater treatment is completed, the treated wastewater is discharged from the water outlet. During the wastewater treatment process, the stirring speed is controlled at 500 r / min, the current density is controlled at 10 mA / cm 2 , and the wastewater treatment time is controlled at 30 min. After the wastewater treatment is completed, the sample is taken for water quality detection, and the degradation efficiency is calculated. It is found that the degradation efficiency of SMX in this embodiment reaches 100%.

[0116] Example 9

[0117] In this embodiment, the electro-catalytic periodate synergistic wastewater treatment method is provided. The electro-catalytic periodate synergistic wastewater treatment device used in the method is basically the same as that in Embodiment 1, except that the reaction cabin shell 2-1 includes six identical anode plates and six identical cathode plates. The height of the anode plate 2-5 and the cathode plate 2-6 is 40% of the height of the water treatment reaction cabin 2, and the anode plate 2-5 and the cathode plate 2-6 are arranged in the middle of the reaction cabin shell 2-1. The width of the anode plate 2-5 and the cathode plate 2-6 is 70% of the diameter of the water treatment reaction cabin 2. The distance between adjacent anode plates and cathode plates is 1 cm. The specific operation is as follows:

[0118] SMX was used as the target pollutant, and SMX simulated wastewater with a concentration of 4 mg / L was prepared. The pH value of the simulated wastewater was 11. The SMX simulated wastewater was completely submerged in the anode plate and the cathode plate in the water treatment reaction cabin of the electro-catalytic periodate synergistic wastewater treatment device. The sodium periodate solution stored in the reagent storage tank was added to the water treatment reaction cabin through the sodium periodate adding device to adjust the concentration of sodium periodate in the wastewater to 0.5 mmol / L. The direct current power source connected to the anode plate and the cathode plate was started to treat the wastewater. After the wastewater treatment was completed, the treated wastewater was discharged from the water outlet. During the wastewater treatment process, the stirring rate was controlled at 200 r / min, the current density was controlled at 5 mA / cm 2 , and the wastewater treatment time was controlled at 30 min. After the wastewater treatment was completed, the water quality was detected, the degradation efficiency was calculated, and it was found that the degradation efficiency of SMX in this embodiment was 98%.

Claims

1. An electro-catalytic periodate salt synergistic wastewater treatment method, characterized by, The method comprises the following steps: The wastewater treatment device is arranged with anode plates and cathode plates, and the wastewater treatment device is added with organic pollutant-containing wastewater to be treated with pH value of 3-11, and the wastewater treatment device is added with a permanganate salt, so that the concentration of the permanganate salt in the wastewater is 0.5-2.0 mmol / L, and the wastewater is treated by starting a direct current power source connected with the anode plates and the cathode plates, and the treated wastewater is discharged; the material of the anode plates is ruthenium oxide-iridium oxide, and the material of the cathode plates is carbon felt; In the wastewater treatment process, the organic pollutants are oxidized and degraded by direct electron transfer on the anode plate, and the electrocatalysis and high iodate oxidation produce active species including OH • , 1 O2, O2 •- , H2O2, IO3 • , which oxidize and degrade the organic pollutants in the wastewater, and part of the pollutants in the wastewater are removed by adsorption on the cathode plate; in the wastewater treatment process, the current density is controlled to be 5~10 mA / cm 2 , and the wastewater treatment time is controlled to be 15~30 min. The wastewater treatment device comprises a power supply device (1), a water treatment reaction cabin (2) and a permanganate salt adding device (3); the power supply device (1) comprises a direct current power source (1-1); the permanganate salt adding device (3) comprises an adding pump (3-1) and a medicament storage tank (3-2); the water treatment reaction cabin (2) comprises a reaction cabin shell (2-1), an upper cover (2-2), a stirring device, a plurality of anode plates (2-4) and a plurality of cathode plates (2-5), the reaction cabin shell (2-1) and the upper cover (2-2) are not conductive; the reaction cabin shell (2-1) is a cylinder with an open upper end, the upper part of the reaction cabin shell (2-1) is provided with a water inlet (2-1-1), a medicament adding port (2-1-2) and a wire inlet and outlet (2-1-3), and the lower part of the reaction cabin shell (2-1) is provided with a water outlet (2-1-4) and a stirring paddle extension inlet (2-1-5); the upper cover (2-2) is installed on the open end of the reaction cabin shell (2-1) to seal the reaction cabin shell; the anode plates (2-4) and the cathode plates (2-5) are arranged in the reaction cabin shell (2-1) in a manner perpendicular to the horizontal plane, each anode plate (2-4) and each cathode plate (2-5) are parallel to each other and arranged alternately; the stirring device comprises a stirring paddle (2-3-1) located in the reaction cabin shell (2-1) and a stirring motor (2-3-2) located outside the reaction cabin shell (2-1) and used for driving the stirring paddle to rotate, and the stirring paddle (2-3-1) is located below the anode plates and the cathode plates; the material of the anode plates (2-4) is ruthenium oxide-iridium oxide, and the material of the cathode plates (2-5) is carbon felt; the anode plates (2-4) and the cathode plates (2-5) are connected with the anode and the cathode of the direct current power source (1-1) respectively, the medicament storage tank (3-2) is communicated with the medicament adding port (2-1-2) through the pipe and the adding pump (3-1), and the water treatment reaction cabin (2) is supported by a support (4) in a state perpendicular to the horizontal plane. The height of the anode plate (2-4) and the cathode plate (2-5) is 40% to 60% of the height of the water treatment reaction chamber (2), and the anode plate (2-4) and the cathode plate (2-5) are arranged in the middle of the reaction chamber shell (2-1); the width of the anode plate (2-4) and the cathode plate (2-5) is 50% to 70% of the diameter of the water treatment reaction chamber (2); the distance between adjacent anode plates and cathode plates is 1 to 5 cm; the reaction chamber shell (2-1) is also fixedly provided with a conductive fixing ring (2-6), which includes an anode plate conductive fixing ring and a cathode plate conductive fixing ring, and the anode plate conductive fixing ring and the cathode plate conductive fixing ring are connected with the anode and the cathode of the direct current power supply (1-1) through wires, respectively, and each anode plate (2-4) is fixed in the reaction chamber shell (2-1) through the anode plate conductive fixing ring, and each cathode plate (2-5) is fixed in the reaction chamber shell (2-1) through the cathode plate conductive fixing ring.

2. The electro-catalytic high iodate salt synergic wastewater treatment method according to claim 1, characterized in that, The anode plate and the cathode plate in the wastewater treatment device are arranged perpendicular to the horizontal plane.

3. The electro-catalytic high iodate salt synergic wastewater treatment method according to claim 1 or 2, characterized in that, The wastewater to be treated containing organic pollutants also contains at least one of Cl - , NO3 - , HCO3 - , SO4 2- .

4. The electro-catalytic high iodate salt synergic wastewater treatment method according to claim 1 or 2, characterized in that, Stirring is applied during the wastewater treatment process.

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