Method and device for removing bacteria and pesticides

Abstract

The invention discloses a method for removing bacteria and pesticides, which comprises the following steps: introducing ozone into water to generate ozone water with the concentration of 0.1-1.2 mg / L or 0.3-1.2 ppm; ultrasonic waves with the frequency of 28-60 kHz act on the ozone water; and putting a to-be-treated object into the ozone water subjected to ultrasonic treatment. The ozone water and the ultrasonic equipment are directly connected for use, so that ozone bubbles in the water are repeatedly compressed and broken by ultrasonic waves, ozone is converted into. OH under strong energy, and the use performance of the ozone water is further improved by improving the concentration of the ozone water and the frequency of the ultrasonic waves.

Description

Technical Field

[0001] The present invention relates to the technical field of pesticide cleaning methods, and in particular to a method and device for sterilizing and removing pesticides. Background Art

[0002] Ozone water has attracted widespread attention due to its hygienic and cleaning functions such as sterilization and pesticide removal. However, its effect in removing pesticides when used alone is poor.

[0003] Ultrasonic waves, which are sound waves exceeding 20kHz, can also be used to remove pesticides. While theoretically, the cavitation effect of ultrasonic waves in water, where bubbles are repeatedly compressed and expanded, creates a powerful energy upon rupture that breaks hydrogen bonds in water, generating free radicals and potentially killing and removing pesticides, when used alone, testing has shown that conventional frequency devices are virtually ineffective in removing bacteria and pesticides due to the low number of bubbles in water. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings in the prior art that ozone water has a poor effect on removing pesticides when used alone, and that when ultrasound is used alone, due to the small number of bubbles in the water itself, testing shows that the sterilization and pesticide removal effect of commonly used frequency equipment is almost non-existent, the present invention provides a method and device for sterilization and pesticide removal, which has the advantages of directly connecting ozone water with ultrasound equipment, so that the ozone bubbles in the water are repeatedly compressed and broken by ultrasound, and the ozone is converted into OH under the strong energy, thereby improving the performance of ozone water.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a method for sterilization and pesticide removal, comprising the following steps: 1) Ozone is introduced into the water to produce ozone water with a concentration of 0.1-1.2 mg / L or 0.3-1.2 ppm; 2) Applying ultrasonic waves with a frequency of 28-60kHz to the ozone water; 3) Place the object to be treated in ozone water after ultrasonic treatment.

[0006] Preferably, the operating frequency of the ultrasound is 28-40 kHz.

[0007] The present invention also discloses a sterilization and pesticide removal device, comprising: an ozone generator, an ultrasonic generator module, a water inlet module, and a power supply module. The water inlet module is connected to the ozone water generator, which is connected to the ultrasonic device so that the ozone water enters the ultrasonic device. The ultrasonic device operates at a frequency of 28-60 kHz.

[0008] Preferably, the ozone generator is an aeration device or an electrolytic water generator.

[0009] Preferably, the aeration device includes an ozone generating assembly and a gas diffusion plate.

[0010] Preferably, the electrolytic water generating device comprises an anode plate and a cathode plate, and the coating composition of the anode plate comprises platinum, tantalum or boron-doped diamond.

[0011] Preferably, the electrolytic water generating device comprises an anode plate and a cathode plate, and the coating composition of the anode plate comprises boron-doped diamond.

[0012] Preferably, the ozone generating module includes an anode electrode and a cathode electrode, the positive power supply end of the power supply module is connected to the anode electrode, and the negative power supply end of the power supply module is connected to the cathode electrode.

[0013] Preferably, the power supply module is configured to provide a current of 5-100 mA / cm2 to the anode electrode and the cathode electrode.

[0014] Preferably, the ultrasonic device includes an ultrasonic generator, a transducer, a water tank and a housing, wherein the ultrasonic generator and the transducer are arranged between the housing and the water tank; or the ultrasonic generator and the transducer are separately placed in the housing.

[0015] The beneficial effects of the present invention are: (1) The principle of the present invention is that the small bubbles in the ozone water and the ozone microbubbles in the ozone water generating device repeatedly expand, contract and burst under the action of ultrasound, generating huge shock waves and microjets, which convert the ozone into high-energy active oxides. (2) The present invention directly connects ozone water with ultrasonic equipment, so that the ozone bubbles in the water are repeatedly compressed and broken by ultrasound, and the ozone is converted into ·OH under strong energy. In addition, the ozone water concentration and the working frequency of ultrasound are improved to further enhance the performance of ozone water. Within the ozone water concentration and ultrasonic frequency range of the present invention, the ultrasonic wave has a significant improvement in the effect of removing the clothing medicine of the ozone microbubbles. (3) The present invention superimposes the ozone cavitation effect of ultrasound, and the sterilization and pesticide removal effect of 0.3ppm ozone water is equivalent to that of simple 0.60ppm ozone water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a graph showing changes in hydroxyl radicals in the ultrasonic-ozone coupled ESR test results of the present invention; Figure 2 This is a graph showing changes in superoxide radicals in the ESR test results of ultrasound-ozone coupling of the present invention; Figure 3 This is a graph showing changes in singlet oxygen radicals in the ultrasound-ozone coupled ESR test results of the present invention; Figure 4Table 1 is the performance data of Examples 3 to 5 and Comparative Examples 1 to 2 of the ultrasonic-ozone sterilization and pesticide removal method of the present invention; Figure 5 Table 2 is the performance data of Examples 6 to 9 and Comparative Examples 1 to 2 of the ultrasonic-ozone sterilization and pesticide removal method of the present invention; Figure 6 It is a structural diagram of the sterilization and pesticide removal device of the present invention.

[0017] In the figure: 100, ozone generator, 200, power supply module, 300, water inlet module, 400, ultrasonic generating module, 301, solenoid valve, 302, flow pump, 401, ultrasonic generator, 402, transducer, 403, shell, 404, water tank. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] In the description of the present invention, unless otherwise specified, “multiple” means two or more; the terms “upper”, “lower”, “left”, “right”, “inside”, “outside”, “front end”, “rear end”, “head”, “tail”, etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms “connected” and “connected” should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In all embodiments of the present invention, the water condition provided by the water inlet module in the experiment is specified as the standard soft water specified in "GB / T23119-2017 Water for Performance Testing of Household and Similar Electrical Appliances".

[0021] The present invention employed a high-performance liquid chromatograph (HPLC) (Shimadzu LC-20A) and a chromatographic column (WondaCract ODS-2, 5 μm C18, 4.6 × 250 mm). The specific detection method primarily refers to the pesticide indicators in "GBT 5750.9-2006 Standard Test Method for Drinking Water." The specific liquid phase analysis method is shown in Tables 1 and 2 below. Diuron project content Mobile phase Methanol: water = 8:2 Total flow rate 1mL / min Column temperature 30℃ Sample injection volume 20 μl Analytical column C18 column Analysis wavelength 254nm Table 2 Atrazine project content Mobile phase Methanol: water = 6:4 Total flow rate 1mL / min Column temperature 30℃ Sample injection volume 20 μl Analytical column C18 column Analysis wavelength 220nm

[0022] In the present invention, the degradation rate = (pesticide concentration at 120 seconds - initial pesticide concentration) / initial pesticide concentration * 100%. The degradation enhancement effect = (ultrasonic excitation ozone water degradation rate - ultrasonic degradation rate - ozone water degradation rate) / ozone water degradation rate * 100%.

[0023] Example 1: A method for sterilizing and removing pesticides, comprising the following steps: 1) Apply 5 mA / cm 2 The ozone water with an ozone concentration of 0.1 mg / L was prepared by a direct current. 2) Place 1.5L of water directly into the water tank containing the ultrasonic module and power the module to generate 28kHz sound waves. 3) 1.5 mg of diuron was added to the water tank 404. After 2 minutes, a sample was taken and the diuron concentration in the water was measured using GCMS. The degradation effect on diuron was 82.01%.

[0024] The sterilization and pesticide removal device in this embodiment includes: an ozone generator 100, an ultrasonic generator module 400, a water inlet module 300 and a power supply module 200. The water inlet module is connected to the ozone water generator, and the ozone water generator is connected to the ultrasonic device so that the ozone water enters the ultrasonic device. A water tank is provided in the ultrasonic device. The operating frequency of the ultrasonic device is 28-60kHz. The power supply module is configured to provide 5-150mA / cm 2 The ozone generating module includes an anode electrode and a cathode electrode, the positive power supply end of the power supply module is connected to the anode electrode, and the negative power supply end of the power supply module is connected to the cathode electrode. The ozone generating device adopts an aeration device, and the aeration device includes an ozone generating assembly and a gas diffusion plate. The ultrasonic device includes an ultrasonic generator 401, a transducer 402 and a shell 403, and the ultrasonic generator and transducer are arranged between the shell and the water tank 404. The anode plate and the cathode plate have a gap suitable for water flow, and the water inlet module includes a solenoid valve 301, a flow pump 302 and related water pipes, faucets and other accessories. Among them, one end of the solenoid valve is connected to the water inlet, and the other end is connected to the flow pump. The flow pump is used to control the water supply to the ozone water generating device. The power supply module is used to provide power to the ozone generating device, the ultrasonic generating module, and the water inlet module.

[0025] Example 2: A method for sterilizing and removing pesticides, comprising the following steps: 1) Apply 100mA / cm 2 The direct current was used to prepare ozone water with an ozone concentration of 1.2 mg / L. 2) Place 1.5L of the prepared ozone water directly into a water tank equipped with an ultrasonic module and power the module to generate 80kHz sound waves. 3) Then, 1.5 mg of diuron was added to the water tank. After 2 minutes, a sample was taken and the atrazine concentration in the water was measured using GCMS. The degradation effect on atrazine was 37.52%.

[0026] like Figure 6 As shown, the sterilization and pesticide removal device in this embodiment includes: an ozone generator, an ultrasonic generator module, a water inlet module, and a power supply module. The water inlet module is connected to the ozone water generator, which is connected to the ultrasonic device so that ozone water enters the ultrasonic device. The ultrasonic device is provided with a water tank. The ozone generator module includes an anode electrode and a cathode electrode. The positive power supply terminal of the power supply module is connected to the anode electrode, and the negative power supply terminal of the power supply module is connected to the cathode electrode. The ozone generator uses an aerator, which includes an ozone generating assembly and a gas diffuser plate. The ultrasonic device includes an ultrasonic generator, a transducer, and a housing. The ultrasonic generator and transducer are disposed between the housing and the water tank. The anode and cathode plates have a gap suitable for water flow. The water inlet module includes a solenoid valve, a flow pump, and related accessories such as water pipes and faucets. One end of the solenoid valve is connected to the water inlet, and the other end is connected to the flow pump. The flow pump is used to control the water supply to the ozone water generator.

[0027] Example 3: A method for sterilizing and removing pesticides, comprising the following steps: In this implementation, two sets of sterilization and pesticide removal devices were prepared; 1) Apply 150mA / cm 2 The direct current was used to prepare ozone water with an ozone concentration of 0.3 ppm. 2) Two 1.5L portions of ozone water were placed directly into the water tanks of two sterilization and pesticide removal devices equipped with ultrasonic modules, while power was supplied to the ultrasonic modules. The two sterilization and pesticide removal devices generated 28kHz and 40kHz sound waves, respectively. 3) Then, add 1.5 mg of diuron to the water tank. After 2 minutes, take a sample and test the diuron concentration in the water using GCMS. Parallel: 4) Then, add 1.5 mg of atrazine to the water tank. After 2 minutes, take a sample and test the atrazine concentration in the water using GCMS. 5) Then, add Staphylococcus aureus to the water tank and take a sample 2 minutes later to test the concentration of Staphylococcus aureus in the water. Here, steps 3), 4), and 5) are three sets of parallel steps, rather than being performed simultaneously. These three sets are subjected to parallel control experiments. In this example, six sets of parallel control experiments were actually performed.

[0028] The sterilization and pesticide removal device of this embodiment includes: an ozone generator, an ultrasonic generating module, a water inlet module and a power supply module. The water inlet module is connected to the ozone water generator, and the ozone water generator is connected to the ultrasonic device so that the ozone water enters the ultrasonic device. A water tank is provided in the ultrasonic device. The electrolytic water generator includes an anode plate and a cathode plate. The coating component of the anode plate includes platinum or tantalum or boron-doped diamond. The ozone generating module includes an anode electrode and a cathode electrode. The positive power supply end of the power supply module is connected to the anode electrode, and the negative power supply end of the power supply module is connected to the cathode electrode. The ozone generator adopts an electrolytic water generator. The electrolytic water generator includes an anode plate and a cathode plate. The coating component of the anode plate includes platinum or tantalum or boron-doped diamond. In addition, the ozone generator of this embodiment uses an aeration device for comparative experiments. The aeration device includes an ozone generating assembly and a gas diffusion plate.

[0029] Example 4: A method for sterilizing and removing pesticides, comprising the following steps: In this implementation, two sets of sterilization and pesticide removal devices were prepared; 1) Apply 150mA / cm 2 The direct current was used to prepare ozone water with an ozone concentration of 0.6 ppm. 2) Two 1.5L portions of ozone water were placed directly into the water tanks of two sterilization and pesticide removal devices equipped with ultrasonic modules, while power was supplied to the ultrasonic modules. The two sterilization and pesticide removal devices generated 28kHz and 40kHz sound waves, respectively. 3) Then, add 1.5 mg of diuron to the water tank. After 2 minutes, take a sample and test the diuron concentration in the water using GCMS. Parallel: 4) Then, add 1.5 mg of atrazine to the water tank. After 2 minutes, take a sample and test the atrazine concentration in the water using GCMS. 5) Then, add Staphylococcus aureus to the water tank and take a sample 2 minutes later to test the concentration of Staphylococcus aureus in the water. Here, steps 3), 4), and 5) are three sets of parallel steps, rather than being performed simultaneously. These three sets are subjected to parallel control experiments. In this example, six sets of parallel control experiments were actually performed.

[0030] The sterilization and pesticide removal device of this embodiment includes: an ozone generator, an ultrasonic generating module, a water inlet module and a power supply module. The water inlet module is connected to the ozone water generator, and the ozone water generator is connected to the ultrasonic device so that the ozone water enters the ultrasonic device. A water tank is provided in the ultrasonic device. The electrolytic water generator includes an anode plate and a cathode plate. The coating component of the anode plate includes platinum or tantalum or boron-doped diamond. The ozone generating module includes an anode electrode and a cathode electrode. The positive power supply end of the power supply module is connected to the anode electrode, and the negative power supply end of the power supply module is connected to the cathode electrode. The ozone generator adopts an electrolytic water generator. The electrolytic water generator includes an anode plate and a cathode plate. The coating component of the anode plate includes platinum or tantalum or boron-doped diamond. In addition, the ozone generator of this embodiment uses an aeration device for comparative experiments. The aeration device includes an ozone generating assembly and a gas diffusion plate.

[0031] Example 5: A method for sterilizing and removing pesticides, comprising the following steps: In this implementation, two sets of sterilization and pesticide removal devices were prepared; 1) Apply 150mA / cm 2 The direct current was used to prepare ozone water with an ozone concentration of 0.7 ppm. 2) Two 1.5L portions of ozone water were placed directly into the water tanks of two sterilization and pesticide removal devices equipped with ultrasonic modules, while power was supplied to the ultrasonic modules. The two sterilization and pesticide removal devices generated 28kHz and 40kHz sound waves, respectively. 3) Then, add 1.5 mg of diuron to the water tank. After 2 minutes, take a sample and test the diuron concentration in the water using GCMS. Parallel: 4) Then, add 1.5 mg of atrazine to the water tank. After 2 minutes, take a sample and test the atrazine concentration in the water using GCMS. 5) Then, add Staphylococcus aureus to the water tank and take a sample 2 minutes later to test the concentration of Staphylococcus aureus in the water. Here, steps 3), 4), and 5) are three sets of parallel steps, rather than being performed simultaneously. These three sets are subjected to parallel control experiments. In this example, six sets of parallel control experiments were actually performed.

[0032] The sterilization and pesticide removal device of this embodiment includes: an ozone generator, an ultrasonic generating module, a water inlet module and a power supply module. The water inlet module is connected to the ozone water generator, and the ozone water generator is connected to the ultrasonic device so that the ozone water enters the ultrasonic device. A water tank is provided in the ultrasonic device. The electrolytic water generator includes an anode plate and a cathode plate. The coating component of the anode plate includes platinum or tantalum or boron-doped diamond. The ozone generating module includes an anode electrode and a cathode electrode. The positive power supply end of the power supply module is connected to the anode electrode, and the negative power supply end of the power supply module is connected to the cathode electrode. The ozone generator adopts an electrolytic water generator. The electrolytic water generator includes an anode plate and a cathode plate. The coating component of the anode plate includes platinum or tantalum or boron-doped diamond. In addition, the ozone generator of this embodiment uses an aeration device for comparative experiments. The aeration device includes an ozone generating assembly and a gas diffusion plate.

[0033] Example 6: A method for sterilizing and removing pesticides, comprising the following steps: In this implementation, four groups of sterilization and pesticide removal devices were prepared; 1) Apply 150mA / cm 2 The direct current was used to prepare ozone water with an ozone concentration of 0.3 ppm. 2) Four 1.5L portions of ozone water were placed directly into the water tanks of four sterilization and pesticide removal devices equipped with ultrasonic modules, while power was supplied to the ultrasonic modules. The four sterilization and pesticide removal devices generated sound waves at 28kHz, 40kHz, 60kHz, and 80kHz, respectively. 3) Then, add 1.5 mg of atrazine to the water tank. After 2 minutes, take a sample and use GCMS to test the atrazine concentration in the water.

[0034] The sterilization and pesticide removal device in this embodiment includes: an ozone generator, an ultrasonic generator module, a water inlet module and a power supply module. A water tank is provided in the ultrasonic device. The water inlet module is connected to the ozone water generator. The ozone water generator is connected to the ultrasonic device so that the ozone water can enter the ultrasonic device. The ozone generator module includes an anode electrode and a cathode electrode. The positive power supply end of the power supply module is connected to the anode electrode, and the negative power supply end of the power supply module is connected to the cathode electrode. The ozone generator adopts an electrolytic water generator. The electrolytic water generator includes an anode plate and a cathode plate. The coating component of the anode plate includes platinum or tantalum or boron-doped diamond. In this example, four groups of parallel control experiments were actually carried out.

[0035] Example 7: A method for sterilizing and removing pesticides, comprising the following steps: In this implementation, four groups of sterilization and pesticide removal devices were prepared; 1) Apply 150mA / cm 2The direct current was used to prepare ozone water with an ozone concentration of 0.6 ppm. 2) Four 1.5L portions of ozone water were placed directly into the water tanks of four sterilization and pesticide removal devices equipped with ultrasonic modules, while power was supplied to the ultrasonic modules. The four sterilization and pesticide removal devices generated sound waves at 28kHz, 40kHz, 60kHz, and 80kHz, respectively. 3) Then, 1.5 mg of atrazine was added to the water tank. After 2 minutes, a sample was taken and the atrazine concentration in the water was tested using GCMS. In this example, four parallel control experiments were conducted.

[0036] The sterilization and pesticide removal device in this embodiment includes: an ozone generator, an ultrasonic generator module, a water inlet module and a power supply module. The water inlet module is connected to the ozone water generator, and the ozone water generator is connected to the ultrasonic device so that the ozone water enters the ultrasonic device. The ozone generator module includes an anode electrode and a cathode electrode. The positive power supply end of the power supply module is connected to the anode electrode, and the negative power supply end of the power supply module is connected to the cathode electrode. The ozone generator adopts an electrolytic water generator. The electrolytic water generator includes an anode plate and a cathode plate. The coating composition of the anode plate includes platinum, tantalum or boron-doped diamond.

[0037] Example 8: A method for sterilizing and removing pesticides, comprising the following steps: In this implementation, four groups of sterilization and pesticide removal devices were prepared; 1) Apply 150mA / cm 2 The direct current was used to prepare ozone water with an ozone concentration of 1.2 ppm. 2) Four 1.5L portions of ozone water were placed directly into the water tanks of four sterilization and pesticide removal devices equipped with ultrasonic modules, while power was supplied to the ultrasonic modules. The four sterilization and pesticide removal devices generated sound waves at 28kHz, 40kHz, 60kHz, and 80kHz, respectively. 3) Then, 1.5 mg of atrazine was added to the water tank. After 2 minutes, a sample was taken and the atrazine concentration in the water was tested using GCMS. In this example, four parallel control experiments were conducted.

[0038] The sterilization and pesticide removal device in this embodiment includes: an ozone generator, an ultrasonic generator module, a water inlet module and a power supply module. The water inlet module is connected to the ozone water generator, and the ozone water generator is connected to the ultrasonic device so that the ozone water enters the ultrasonic device. The ozone generator module includes an anode electrode and a cathode electrode. The positive power supply end of the power supply module is connected to the anode electrode, and the negative power supply end of the power supply module is connected to the cathode electrode. The ozone generator adopts an electrolytic water generator. The electrolytic water generator includes an anode plate and a cathode plate. The coating composition of the anode plate includes platinum, tantalum or boron-doped diamond.

[0039] Example 9: A method for sterilizing and removing pesticides, comprising the following steps: In this implementation, four groups of sterilization and pesticide removal devices were prepared; 1) Apply 150mA / cm 2 The ozone water with an ozone concentration of 1.5 ppm was prepared by a direct current. 2) Four 1.5L portions of ozone water were placed directly into the water tanks of four sterilization and pesticide removal devices equipped with ultrasonic modules, while power was supplied to the ultrasonic modules. The four sterilization and pesticide removal devices generated sound waves at 28kHz, 40kHz, 60kHz, and 80kHz, respectively. 3) Then, 1.5 mg of atrazine was added to the water tank. After 2 minutes, a sample was taken and the atrazine concentration in the water was tested using GCMS. In this example, four parallel control experiments were conducted.

[0040] The sterilization and pesticide removal device in this embodiment includes: an ozone generator, an ultrasonic generator module, a water inlet module and a power supply module. The water inlet module is connected to the ozone water generator, and the ozone water generator is connected to the ultrasonic device so that the ozone water enters the ultrasonic device. The ozone generator module includes an anode electrode and a cathode electrode. The positive power supply end of the power supply module is connected to the anode electrode, and the negative power supply end of the power supply module is connected to the cathode electrode. The ozone generator adopts an electrolytic water generator. The electrolytic water generator includes an anode plate and a cathode plate. The coating composition of the anode plate includes platinum, tantalum or boron-doped diamond.

[0041] This example is a control group, and its experimental data shows that when the ozone concentration exceeds 1.5 ppm, there is no improvement effect but rather a problem of reducing the degradation rate.

[0042] Comparative Example 1: 1.5 L of water was placed directly into a water tank 401 equipped with an ultrasonic module 400. Power was supplied to the ultrasonic module, generating 80 kHz sound waves. Then, 1.5 mg of diuron was added to the water tank 404. After 2 minutes, a sample was taken and the diuron concentration in the water was measured using GCMS. The test showed that pure ultrasound had a diuron degradation effect of 1.93%.

[0043] Comparative Example 2: 1.5 L of ozone water was placed in a water tank equipped with an ultrasonic module 400. Without power to the ultrasonic module, 1.5 mg of diuron was added to the water tank. After 2 minutes, a sample was taken and the diuron concentration in the water was measured using GCMS. The ozone water showed a 67.42% degradation rate on diuron.

[0044] In summary, Figure 1 、 Figure 2 and Figure 3 The presence of a 1:2:2:1 ratio of ·OH signal peaks, a 1:1:1:1 ratio of ·O2- signal peaks, and a 1:1:1 ratio of 1O2 characteristic signal peaks in both the BDD and BDD-coupled ultrasound systems demonstrates the presence of ·OH, ·O2-, and 1O2 in both systems. Furthermore, the peak intensities in both the BDD and BDD-coupled ultrasound systems are in the order of 1O2 > ·OH > ·O2-. Furthermore, the figure shows that the three active species signal peaks are enhanced at 30s, 60s, and 120s in the BDD-coupled ultrasound system compared to the BDD system, indicating that BDD-coupled ultrasound can, to a certain extent, accelerate the generation of reactive oxygen species in the reaction system, thereby accelerating the degradation of the target pollutants. ESR technology was used to identify the reactive oxygen species that may have been generated in both the BDD and BDD-coupled ultrasound systems.

[0045] Combine Figure 4 It can be seen that in Examples 3, 4, and 5, when the ozone concentration in the ozone water is 0.3 ppm and 0.6 ppm and the ultrasonic operating frequency is 28-40 kHz, the degradation effect of diuron and the improvement effect of atrazine degradation rate are both very good (the improvement effect on the degradation effect of diuron is 18%-58%, and the improvement effect on the degradation effect of atrazine is 29%-147%). For specific data, see Figure 4 The improvement effect on the removal of Staphylococcus aureus also reached 60-114%.

[0046] At the same time, according to the experimental results, it is found that for the same concentration of ozone water, the effect of electrolysis method is greater than that of aeration method. Figure 4 The comparison results in the experiment also show that the ozone bubbles produced by the electrolysis method are smaller, which is conducive to the degradation reaction; and it is conducive to the enhancement of the cavitation effect of ultrasound and the stimulation of more free radicals.

[0047] Combine Figure 5It can be seen that in Examples 6, 7, 8 and 9, when the ozone concentration in the ozone water is 0.3ppm and 0.6ppm and the ultrasonic operating frequency is 28-60kHz, the atrazine degradation rate is improved very high. However, when the ozone concentration in the ozone water is 1.2ppm and the ultrasonic operating frequency is 28-60kHz, the atrazine degradation rate is improved by only 15-35%, while when the ozone concentration in the ozone water is 1.5ppm and the ultrasonic operating frequency is 28-60kHz, the atrazine degradation rate is improved by -7-2%. Obviously, when the ozone concentration in the ozone water exceeds 1.2ppm, the degradation rate improvement effect is greatly reduced; under the action of 80kHz ultrasound, the atrazine degradation rate improvement effect decreases at different ozone concentrations in the ozone water.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent structural transformation made by using the contents of the description and drawings of the present invention, directly or indirectly applied to other related technical fields, is also included in the scope of protection of the present invention.

Claims

1. A method for sterilization and pesticide removal, characterized in that: The following steps are involved: 1) Ozone is introduced into the water to produce ozone water with a concentration of 0.1-1.2 mg / L or 0.3-1.2 ppm; 2) Applying ultrasonic waves with a frequency of 28-60kHz to the ozone water; 3) Place the object to be treated in ozone water after ultrasonic treatment.

2. The method for sterilization and pesticide removal according to claim 1, wherein: The operating frequency of the ultrasonic wave is 28-40 kHz.

3. A sterilization and pesticide removal device, characterized in that: include: An ozone generator, an ultrasonic generating module, a water inlet module and a power supply module, wherein the water inlet module is connected to the ozone water generator, and the ozone water generator is connected to the ultrasonic device so that the ozone water enters the ultrasonic device; the operating frequency of the ultrasonic device is 28-60kHz.

4. The sterilization and pesticide removal device according to claim 3, characterized in that: The ozone generating device adopts an aeration device or an electrolytic water generating device.

5. The sterilization and pesticide removal device according to claim 4, characterized in that: The aeration device includes an ozone generating component and a gas diffusion plate.

6. The sterilization and pesticide removal device according to claim 4, characterized in that: The electrolytic water generating device comprises an anode plate and a cathode plate, and the coating component of the anode plate comprises platinum or tantalum.

7. The sterilization and pesticide removal device according to claim 4, characterized in that: The electrolytic water generating device comprises an anode plate and a cathode plate, and the coating composition of the anode plate comprises boron-doped diamond.

8. The sterilization and pesticide removal device according to claim 3, characterized in that: The ozone generating module comprises an anode electrode and a cathode electrode. The positive power supply end of the power supply module is connected to the anode electrode, and the negative power supply end of the power supply module is connected to the cathode electrode.

9. The sterilization and pesticide removal device according to claim 8, characterized in that: The power supply module is configured to provide 5-100 mA / cm2 to the anode electrode and the cathode electrode. 2 of current.

10. The sterilization and pesticide removal device according to claim 3, characterized in that: The ultrasonic device comprises an ultrasonic generator, a transducer, a water tank and a shell, wherein the ultrasonic generator and the transducer are arranged between the shell and the water tank; or the ultrasonic generator and the transducer are separately placed in the shell.

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