In-situ electrochemical water treatment device and method

Abstract

The invention discloses an in-situ electrochemical water treatment device and method, and the device comprises an ecological floating island as a main body; the protective shell and the screen are arranged below the ecological floating island; the oxidant loading chamber is arranged in the protective shell; the electrode system comprises a positive electrode, a negative electrode, a platinum sheet electrode clamp and a wire. The device adopts an innovative design and is combined with an automatic response and indication mechanism, so that the automation and intelligence level of water pollutant treatment is effectively improved, and meanwhile, secondary pollution is avoided. According to the working principle, an oxidation-reduction reaction is divided into an oxidation half reaction and a reduction half reaction, and direct contact between an oxidizing agent and a polluted water body is avoided, so that the risk of secondary pollution is reduced. In the device, the existence of pollutants causes the change of the voltage difference between the electrodes to trigger the start of degradation reaction, so that the pollutants can be treated in time. The device is further provided with an indicator lamp, the pollutant treatment progress is indicated through the brightness of the indicator lamp, and the visualization of water pollution treatment is enhanced.

Description

Technical Field

[0001] This invention belongs to the field of materials engineering and environmental engineering technology, and relates to an in-situ electrochemical water treatment device and method. Background Technology

[0002] The advent and continuous development of the industrial age have led to a sustained and rapid increase in the generation and discharge of anthropogenic wastewater, forcing people to seek inexpensive, efficient, and environmentally friendly wastewater treatment methods. Past experience in wastewater treatment has shown considerable success with comprehensive wastewater collection, treatment, and discharge systems and the construction of water treatment plants. However, it must be pointed out that this approach has inherent problems, such as high energy consumption, high treatment costs, and low treatment efficiency, especially in dealing with sudden pollution incidents in special geographical areas such as communities, wetlands, and parks, where wastewater transportation is inconvenient and timely treatment is difficult. Therefore, in-situ wastewater treatment has emerged. Due to its low cost and low energy consumption, in-situ wastewater treatment is becoming increasingly popular.

[0003] Currently, commonly used in-situ wastewater treatment technologies mainly include advanced oxidation technologies. These technologies involve adding strong oxidants to polluted water bodies to generate highly reactive oxidizing substances that degrade or transform organic pollutants. However, despite its effectiveness in treating organic pollutants, this technology also has serious drawbacks. First, direct contact between strong oxidants and their byproducts and the water body can easily cause secondary pollution, biological damage, and difficulties in waste disposal. Second, existing in-situ wastewater treatment technologies lack effective automated feedback mechanisms, making it impossible to monitor the presence of pollutants in the water, the initiation of the degradation process, and whether the degradation reaction has completely ended in real time. This leads to uncertainty in treatment effectiveness and difficulty in controlling the reaction process. Summary of the Invention

[0004] This invention proposes an in-situ electrochemical water treatment device and method, which aims to solve the problem of secondary pollution in the prior art and realize automatic response and automatic indication of the degradation process.

[0005] This invention effectively avoids direct contact between strong oxidants and polluted water by dividing the oxidation-reduction reaction into an oxidation half-reaction and a reduction half-reaction. The oxidation reaction in the device acts on organic pollutants in the polluted water, while the reduction reaction of the oxidant is isolated in a separate floating chamber, preventing direct contact between the oxidant and the water and thus avoiding potential secondary pollution. When pollutants enter the water, the voltage difference between the positive and negative electrodes of the device increases, triggering the degradation reaction. During the reaction, electrons are transferred from the pollutant end to the floating chamber end via the voltage difference, successfully degrading the pollutant. Through this voltage difference change, the device can automatically sense the presence of pollutants and automatically drive the degradation reaction. This process ensures that the oxidation reaction starts promptly when pollutants are present; when the pollutants are completely degraded, the voltage difference decreases, and the system automatically stops the reaction. This self-response mechanism not only reduces human intervention but also enhances the intelligence and automation of water pollution treatment. Simultaneously, the device is also equipped with an indicator light feedback mechanism. When pollutants are present, the device detects the voltage and triggers an indicator light (green light) to indicate that the degradation of the pollutants is in progress. When the reaction is complete and the degradation of pollutants in the water ends, the voltage drops below the set value, the indicator light goes out, and the pollutants have been completely treated. This design provides an automatically indicated pollutant treatment solution, significantly improving the automation and intelligence of the treatment process.

[0006] In summary, this invention avoids direct contact between water and oxidant by separating the oxidation-reduction reaction. At the same time, the electrode system design and automated indication system realize automatic response and indication of the pollutant treatment process. This not only effectively avoids the secondary pollution problem in traditional oxidation technology, but also improves the visualization and controllability of water treatment, meeting the needs of water pollution control of different scales.

[0007] An in-situ electrochemical water treatment device, comprising: The main body that can float on water; An oxidant loading chamber is disposed inside the main body; A screen is installed under the main body; The negative electrode is disposed in the oxidant loading chamber; A positive electrode is disposed outside the main body; Circuit boards and indicator lights are mounted on the main body; The wires and electrode clips are connected to the electrode circuit board and indicator lights.

[0008] Further preferably, an in-situ electrochemical water treatment device includes: Ecological floating islands serve as the main element; A protective shell is installed under the ecological floating island, and the bottom of the protective shell is provided with an opening; A stainless steel screen is installed inside the opening. Oxidant loading chamber installed inside the protective shell; An electrode system includes a positive electrode, a negative electrode, a platinum electrode clip, and a wire, wherein the negative electrode is placed in polluted water, the positive electrode is placed in the oxidant loading chamber, and the wire is connected to the positive and negative electrodes through the platinum electrode clip. A circuit board connected to the wires; And indicator lights mounted on the circuit board.

[0009] The structural design of this device must meet the requirements for supporting efficient redox reactions, avoid secondary pollution, and ensure the stability and efficiency of the reaction process. Especially in floating water treatment devices, the stability of the device, the sealing of the reaction chamber, and the isolation from the water body must be considered to ensure the continuous and stable progress of the redox reaction during water treatment. Simultaneously, the device should possess flexible assembly capabilities and the ability to automate and visualize pollutant degradation to adapt to the needs of water pollution treatment at different scales. Therefore, this invention designs the following structural optimization scheme: First, the ecological floating island is made of polyethylene, and the ecological floating island made of high-density polyethylene (such as...) Figure 1 As shown, the floating island (the main body of the floating water treatment device) possesses sufficient buoyancy to ensure excellent stability in the water. The oxidant loading chamber is constructed of transparent acrylic material, with the reaction chamber built in the form of circular tubes and plates. This not only effectively ensures the sealing of the reaction chamber but also reduces the gravitational load on the device. To enhance the device's adaptability to different water environments, a protective shell and a stainless steel screen are installed below the floating bed. This screen effectively filters aquatic plants and large particles in the polluted water that may damage the electrodes. The protective shell is made of stainless steel. The stainless steel screen is 100 mesh. The screen is connected to the floating bed with nylon cable ties to ensure its sturdiness, thereby further improving the overall stability of the device.

[0010] The electrode system is designed with platinum sheet electrode clamps for fixation. The negative electrode is placed in the polluted water, while the positive electrode is located in the reduction semi-reaction chamber (load chamber). The two are connected by wires fixed to the surface of the floating bed to ensure the stability of the electrode system. The combined use of the platinum sheet electrode clamps and wires ensures the stability and anti-interference capability of the current flow in the water. In addition, the device is equipped with an indicator light circuit board, which is connected between the two platinum sheet electrode clamps via wires to control the on / off state of the indicator light. The indicator light is a voltage difference display indicator.

[0011] The reaction principle of this device is as follows: Figure 4As shown, when pollutants enter the water, the voltage difference between the positive and negative electrodes increases, automatically triggering the degradation reaction. Electrons are transferred from the pollutants to persulfate, successfully degrading the pollutants. The device designed based on this principle closely links voltage changes with the water pollution level, ensuring the reaction proceeds automatically. Furthermore, by isolating the floating chamber from the water, secondary pollution is avoided.

[0012] An in-situ electrochemical water treatment method, employing an in-situ electrochemical water treatment device, specifically includes: first preparing a positive electrode and a negative electrode, then installing them into the in-situ electrochemical water treatment device; adding potassium persulfate solution to the oxidant loading chamber; and immersing the device in wastewater containing bisphenol A.

[0013] The preparation of the positive and negative electrodes specifically includes: washing graphite felt with acetone, ethanol and deionized water in sequence, cutting the dried graphite felt into the required structure as a substrate, thoroughly mixing copper single-atom powder with ethanol, deionized water and Nafion solution, ultrasonically treating the mixture to obtain a stable suspension, then uniformly dripping the suspension onto the prepared substrate, drying it and washing it several times with deionized water to obtain the electrode, which serves as the positive and negative electrodes.

[0014] Dry at 35~45℃ for 4~8 hours.

[0015] The ratio of the copper single-atom powder to ethanol, deionized water and Nafion solution is 150~250 mg: 15~25 mL: 15~25 mL: 150~250 μL.

[0016] The Nafion solution has a mass percentage of 4-6 wt%.

[0017] The indicator light circuit includes: power management current, IV conversion circuit, running indicator light circuit, and STM32F103RCT6 minimum system circuit, specifically including: The main control unit adopts the STM32F103C8T6 microcontroller minimum system, including: Clock circuit: Connects to an 8MHz external crystal oscillator to provide a reference clock signal; Reset circuit: An RC delay network consisting of a 10kΩ pull-up resistor and a 100nF capacitor; Boot mode selection circuit: Equipped with a BOOT selection jumper interface; Debugging interface: adopts FPC8 interface, including SWDIO and SWCLK debug signal lines, MCU_TXD and MCU_RXD data transmission lines, DAT signal line, AD signal line and power line; Power supply decoupling circuit: includes 4 sets of 0.1μF decoupling capacitors arranged in parallel, which are respectively connected to the power supply pins of the microcontroller; The power management system includes: Main power module: It adopts IP5306CK power management chip, which is connected to a 3.0V-4.2V lithium battery at its input terminal. It integrates a boost converter to output a DC voltage with a precision of 5V±2%, and has a built-in power metering unit. It supports a maximum charging current of 2A and a discharging current of 2.4A. Secondary voltage regulator module: adopts XC6206-3.3nr voltage regulator chip, the input terminal is connected to the output terminal of the main power module, the output voltage is regulated to 3.3V±1%, and a 10μF ceramic filter capacitor is connected in parallel at the output terminal; The IV conversion circuit includes: Analog multiplexer: An 8-channel voltage divider resistor selection circuit is constructed using the CD4051 chip; Signal amplification circuit: It consists of an operational amplifier, and its output is connected to the GPIO port of the main control unit; The operating status indication system includes: Voltage status indicator unit: Green LED connected to PA8 pin of main control unit; Power status indicator unit: red LED; Operating status indicator: Blue LED, whose flashing state indicates that the chip is working normally.

[0018] The working principle of the indicator light is as follows Figure 9 As shown, when the device is in unpolluted water, the voltage difference between the positive and negative electrodes is approximately 0.11V; when pollutants are added to the water, the voltage difference increases to 0.55V. The built-in analog-to-digital converter on the circuit board converts this analog signal into a digital signal, and the program determines whether the voltage value exceeds a set threshold (0.45V). When the voltage difference reaches this threshold, the circuit board outputs a high level through the GPIO port, creating a potential difference across the connected LED, thus illuminating the LED. This indicator feedback mechanism can reflect the start and end of the pollutant degradation process in real time, providing automatic indication capabilities, thereby effectively reducing manual intervention and improving the visualization and intelligence level of the water treatment process.

[0019] The present invention has the following outstanding features and beneficial effects.

[0020] 1. The device is carbon-zero driven: the system uses the chemical energy of pollutants to drive the reaction, without the need for additional energy supply.

[0021] 2. Environmentally friendly: It avoids the oxidative damage to aquatic organisms caused by oxidants or active substances in traditional in-situ chemical oxidation processes, and also avoids the discharge of other substances from the reaction.

[0022] 3. Self-response of pollutant degradation: The presence of pollutants in the water body causes an increase in the voltage difference between the positive and negative electrodes, thereby automatically driving the initiation of the degradation reaction.

[0023] 4. Visualized Pollution Detection: The voltage difference between the positive and negative electrodes of the device is 0.11V in water without pollutants and 0.55V in water with pollutants. With 0.45V as the set value, when the voltage difference between the positive and negative electrodes is detected to be greater than 0.45V, the indicator light will illuminate to indicate the presence of pollutants and the start of degradation; the light will go out to indicate that the pollutants have been removed.

[0024] 5. Modular device construction: The reaction device is designed as a modular device. Each device can work independently or be assembled in an array according to the scale of the water body to be treated, adapting to different sizes of water bodies to meet the diverse needs of in-situ treatment of polluted water bodies.

[0025] 6. The device's structural design includes an ecological floating island as the main body, an oxidant loading chamber constructed of acrylic material, and a screen filtration system. An electrode circuit system is installed within the device to automatically drive pollutant degradation through voltage changes and provides feedback from indicator lights. This device not only achieves highly efficient automated pollutant degradation but also allows for visualization of the degradation process, avoiding the high energy consumption and secondary pollution problems of traditional technologies. Its modular design makes it suitable for water pollution treatment needs of different scales, exhibiting good scalability and adaptability.

[0026] 7. The water treatment device of the present invention has advantages such as zero-carbon drive, environmental friendliness, modular assembly, self-response to pollutant degradation, and visual detection of pollution. It is suitable for pollution treatment of various water bodies, and shows unique advantages, especially in sudden pollution events and special geographical environments. Attached Figure Description

[0027] Figure 1 It is an ecological floating island.

[0028] Figure 2 A plan view diagram of the device design.

[0029] Figure 3 A 3D model of the device.

[0030] Figure 4 This is a schematic diagram illustrating the working principle of the device.

[0031] Figure 5 This is a schematic diagram of the device operating in actual water. In the diagram, 1 is the ecological floating island; 2 is the oxidant loading chamber; 3 is the protective shell and stainless steel screen; 4 is the negative electrode; 5 is the positive electrode; 6 is the circuit board; 7 is the indicator light; 8 is the platinum electrode clamp; 9 is the wire; 10 is the water containing pollutants; 11 is the pollutant; and 12 is the degradation product.

[0032] Figure 6The images shown are the front view, top view, and top-view of the device (from left to right). Figure 7 The relative concentration of bisphenol A, C t / C0 trend graph as a function of reaction time (hours).

[0033] Figure 8 The diagram shows the indicator lights. The left image shows the indicator light off before the contaminant is added, and the right image shows the indicator light on after the contaminant is added.

[0034] Figure 9 This is a schematic diagram of an indicator light.

[0035] Figure 10 This is the circuit diagram for the indicator light module.

[0036] Figure 11 The images show the front view (top left), side view (top right), top view (bottom left), and top view (bottom right) of the floating device array for in-situ pollution purification.

[0037] Figure 12 A schematic diagram and photos of the floating device array for in-situ purification of zero-carbon emissions at five different deployment points in the northern river network of Qiandao Lake. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings.

[0039] like Figure 5 As shown, an in-situ electrochemical water treatment device includes: an ecological floating island 1 as the main body; a protective shell and a stainless steel screen 3 disposed under the ecological floating island 1, the top of the protective shell being fixed to the ecological floating island 1 and the bottom of the protective shell being fixed to the screen; an oxidant loading chamber 2 installed inside the protective shell; an electrode system including a positive electrode 5, a negative electrode 4, a platinum electrode clip 8, and a wire 9, wherein the negative electrode 4 is placed in water 10 containing pollutants 11, the positive electrode 5 is placed in the oxidant loading chamber 2, and the wire 9 is connected to the positive electrode 5 and the negative electrode 4 through the platinum electrode clip 8; a circuit board 6 connected to the wire 8; and an indicator light 7 installed on the circuit board 6. The ecological floating island 1 is made of polyethylene. The protective shell is made of stainless steel. The stainless steel screen is 100 mesh. The oxidant loading chamber 2 is constructed of acrylic material.

[0040] Example 1: Preparation and Application of In-situ Electrochemical Water Treatment Device (1) Processing procedure of the present invention Synthesis and preparation of catalyst and electrode: 2.092 g Cu(CO2CH3)2⦁H2O and 0.771 g L-1 glutamic acid were added and fully dissolved in 500 mL deionized water. Simultaneously, 1.16 g 1,3,5-benzenetricarboxylic acid was dissolved in a mixture of 450 mL deionized water and 50 mL ethanol under ultrasonic treatment. The two solutions were then mixed together and stirred under ambient conditions for 2 hours. Afterwards, the mixture was centrifuged, and the resulting blue powder was washed three times with deionized water and then dried at 60 °C for 12 hours. The resulting solid powder was Cu(BTC)(H2O)3MOF. 0.2 g of Cu(BTC)(H2O)3MOF powder was mixed with 2 g DCD. The mixture was ground in a mortar for 10 minutes. The mixture was then ground at 5 °C for 1 minute under an argon atmosphere. - 1 The heating rate was maintained at 800 °C for 5 h. Finally, the obtained powder was soaked in 40 ml of 5% HCl aqueous solution and saturated oxygen for 4 h to remove residues. Afterwards, the collected powder was washed several times with deionized water, and the final powder was used for further electrode preparation.

[0041] A commercially available graphite felt (GF) with a thickness of 2.0 mm was washed successively with acetone, ethanol, and deionized water. After drying at 60 °C for 6 hours, the cleaned GF was cut into the desired structure for further use. To prepare the coating, 200 mg of the prepared powder was thoroughly mixed with 20 mL of ethanol, 20 mL of deionized water, and 200 μL of Nafion solution (5 wt%). The mixture was sonicated for 1 hour to obtain a stable suspension. The suspension was then uniformly dripped onto a prepared GF substrate, which was 8.0 cm long, 5.0 cm high, and 0.20 cm thick. The resulting sample was dried at 40 °C for 6 hours and then washed several times with deionized water. The cleaned sample became the electrode.

[0042] Device setup: Ecological floating islands (such as Figure 1 The floating bed serves as the main body of the floating water treatment unit, ensuring sufficient buoyancy. An oxidant loading chamber is constructed using acrylic tubing and plates. A stainless steel screen is installed below the floating bed to filter out aquatic plants and large particles that could potentially damage the electrodes. Nylon cable ties connect the floating bed and the screen. A schematic diagram of the unit design is shown below. Figure 2 Simultaneously, the electrodes are fixed with platinum electrode clamps. The negative electrode is placed in the polluted water, and the positive electrode is placed in the reduction semi-reaction chamber (load chamber). The two platinum electrode clamps are connected with wires, and the wires are fixed to the surface of the floating bed. The circuit board with indicator lights is connected to the middle of the two platinum electrode clamps with wires.

[0043] Indicator light manufacturing: according to, for example Figure 10 The circuit diagram shown is used to build an indicator light module, as follows. Figure 9 As shown, when the device is in a polluted water body, the voltage difference between the anode and cathode is 0.11 V. After pollutants are added, the voltage difference increases to 0.55 V. The analog-to-digital converter module built into the circuit board converts the analog voltage signal into a digital signal. The built-in program on the circuit board judges the digital voltage value. When the voltage value reaches a certain threshold (0.45 V), the circuit board controls a GPIO port to output a high level, so that a potential difference is generated across the LED connected to the GPIO port, and the LED lights up.

[0044] (2) Effects obtained by this embodiment Figure 3 For the 3D model of the device, Figure 4 This is a schematic diagram illustrating the working principle. Figure 5 This is a schematic diagram of the device operating in an actual water body. The constructed device is as follows: Figure 6 As shown, the front view, side view, and top view of the device are respectively, indicating that the device has been successfully assembled.

[0045] 500 mL of 10 mmol / L potassium persulfate (PDS) solution was added to the cathode reaction chamber. The apparatus was then placed in 48 L of an aqueous solution containing 0.5 μmol / L bisphenol A (BPA). This aqueous environment contained 0.5 wt‰ NaCl as the electrolyte. After placing the apparatus in the polluted water body, the first sample was collected. Subsequent samples were collected at intervals (1 mL of the reaction solution was passed through a membrane). After 42 hours of reaction, the BPA concentration of all samples was measured using high-performance liquid chromatography (HPLC) under methanol:water = 70:30 conditions. The peak area of ​​BPA for the first sample was denoted as C0, and the peak areas for subsequent samples were denoted as C10, C20, C30, C40, C50, C60, C70, C80, C9 ... t Plotting reaction time (time (h)) on the x-axis and BPA relative concentration C on the y-axis... t With / C0 as the ordinate, plot C t The line graph of / C0 as a function of reaction time (h) is shown below. Figure 7 As shown. By Figure 7 It can be seen that after 24 hours of reaction, the relative concentration of BPA was 66.80% of the initial concentration, indicating a high purification efficiency. After 48 hours of reaction, the relative concentration of BPA decreased to 39.79%, at which point the device had completed more than 50% purification of BPA. The test results show that the device has good purification efficiency for BPA.

[0046] like Figure 8 As shown on the left, before the contaminant was added, the device was not working, the voltage difference was lower than the set value, and the indicator light was not lit. Figure 8As shown on the right, when a contaminant is added, the voltage difference in the circuit exceeds the set value. The circuit board detects this and triggers the indicator light to illuminate, indicating that a purification reaction has occurred. After the purification reaction is complete, the voltage difference in the circuit decreases below the set value, and the indicator light goes out. This demonstrates that the device has an automatic indication function.

[0047] Example 2: Application of in-situ electrochemical water treatment device array in the northern river network of Qiandao Lake like Figure 11 As shown in the diagram, this embodiment assembles six in-situ pollution purification floating device units into a hexagonal array. The array is deployed at five different locations in the northern river network of Qiandao Lake in Chun'an County, Hangzhou City. The locations and deployment sites are shown in the diagram. Figure 12 As shown.

[0048] Among them, the No. 1 and No. 2 release points are located near the source of the river, where the water is clear and the pollutant concentration is low. The release array can further reduce the pollutant concentration and improve the source water quality. The No. 3 and No. 4 release points are located upstream of the confluence of the tributary and the main stream, where the water is relatively turbid and the current is relatively rapid. The array can reduce the pollutant concentration before the tributary flows into the main stream, indirectly improving the water quality of the main stream. The No. 5 release point is located upstream of the confluence near a residential area, where the water turbidity is even higher. The release array can reduce the pollutant concentration in the tributary while improving the water quality for residents' domestic use.

[0049] This embodiment aims to achieve source control of water quality in Qiandao Lake, improve the overall quality of water flowing into the lake through upstream water purification, and provide a demonstration for subsequent large-scale application in ecological water areas.

Claims

1. An in-situ electrochemical water treatment device, characterized in that, The utility model relates to an in-situ electrochemical water treatment device, comprising: an ecological floating island as a main body; a protective shell and a screen mesh arranged under the ecological floating island, the top of the protective shell being fixed with the ecological floating island, and the bottom of the protective shell being fixed with the screen mesh; an oxidant loading chamber installed in the protective shell; an electrode system comprising a positive electrode, a negative electrode, a platinum sheet electrode clamp and a wire, wherein the negative electrode is placed in a polluted water body, the positive electrode is placed in the oxidant loading chamber, and the wire is connected with the positive electrode and the negative electrode through the platinum sheet electrode clamp; a circuit board connected with the wire; and an indicator light installed on the circuit board.

2. The in-situ electrochemical water treatment device of claim 1, wherein, The ecological floating island is made of polyethylene.

3. The in-situ electrochemical water treatment device of claim 1, wherein, The protective shell is made of stainless steel.

4. The in-situ electrochemical water treatment device of claim 1, wherein, The screen mesh is a stainless steel mesh with a mesh size of 50-120.

5. The in-situ electrochemical water treatment device of claim 1, wherein, The oxidant loading chamber is made of acrylic material.

6. The in-situ electrochemical water treatment device of claim 1, wherein, The indicator light is an indicator light with a voltage difference state display.

7. The in-situ electrochemical water treatment device of claim 1, wherein, The circuit board is provided with an indicator light circuit connected with the indicator light, which comprises a power management circuit, an I-V conversion circuit connected with the power management circuit, a running indicator light circuit connected with the I-V conversion circuit, and an embedded-microcontroller integrated circuit of the running indicator light circuit, and the indicator light is connected with the running indicator light circuit.

8. An in-situ electrochemical water treatment method, characterized by, The in-situ electrochemical water treatment device according to any one of claims 1-7, specifically comprising: firstly preparing the positive electrode and the negative electrode, then installing them into the in-situ electrochemical water treatment device, adding potassium peroxydisulfate solution into the oxidant loading chamber, and placing the device into sewage containing organic pollutants.

9. The in-situ electrochemical water treatment method of claim 1, wherein, The preparation of the positive electrode and the negative electrode specifically comprises: washing graphite felt with acetone, ethanol and deionized water in sequence, cutting the dried graphite felt into a required structure as a substrate, thoroughly mixing copper monatomic powder with ethanol, deionized water and Nafion solution, ultrasonically treating the mixture to obtain a stable suspension, then uniformly dropping the suspension onto the prepared substrate, washing the dried substrate with deionized water for several times to obtain the electrode as the positive electrode and the negative electrode.

10. The in-situ electrochemical water treatment method of claim 1, wherein, The ratio of the use amounts of the copper monatomic powder, ethanol, deionized water and Nafion solution is 150-250 mg: 15-25 mL: 15-25 mL: 150-250 μL. The mass percentage of the Nafion solution is 4-6 wt%.

Images