Soil pollution remediation device combining microbial electrochemical technology and plants

Abstract

The utility model provides a soil pollution remediation device combining a microbial electrochemical technology and plants. The soil pollution remediation device comprises a plurality of positive electrode plates, a plurality of negative electrode plates, a constant potential rectifier, remediation plants, remediation microorganisms and an electrode plate insertion device, the positive electrode plates and the negative electrode plates are inserted into to-be-remediated soil at intervals, the positive electrode plates and the negative electrode plates are connected with the potentiostat, the remediation plants are planted between the positive electrode plates and the negative electrode plates, and the remediation microorganisms are sprayed and permeated into the to-be-remediated soil; the electrode plate inserting device comprises a steel plate, a mounting frame, a lifting motor, an electrode plate pressing plate and a pressing plate limiting component, the steel plate is in vertical sliding connection with the positive electrode plate or the negative electrode plate, the steel plate is in vertical sliding connection with the mounting frame, and the lifting motor is connected with the steel plate through a transmission mechanism to drive the steel plate to lift; the electrode plate pressing plate is rotationally connected to the mounting frame through a hinge; and when the electrode plate pressing plate falls down, the electrode plate pressing plate corresponds to the positive electrode plate or the negative electrode plate in a vertical position.

Description

Technical Field

[0001] The utility model belongs to the technical field of soil pollution restoration, in particular to a soil pollution restoration device combining microbial electrochemical technology with plants. Background Art

[0002] Soil is one of the main natural resources on which human beings depend for survival, and is also an important part of the human ecological environment. With the increase in the emission of inorganic and organic pollutants in the environment, the situation of soil pollution has become increasingly severe. Soil pollution not only affects the output and quality of agricultural products, but also involves the quality of the atmosphere and water environment, and can endanger the life and health of animals and humans through the food chain. Soil pollution needs to be repaired. Soil remediation refers to the use of physical, chemical and biological methods to transfer, absorb, degrade and transform pollutants in the soil to reduce their concentration to an acceptable level, or to transform toxic and harmful pollutants into harmless substances. With the development of science and technology, many soil remediation materials have been developed. The remediation of contaminated soil by artificial spraying of remediation agents, inoculum solutions, etc. has the disadvantages of poor remediation effect and low remediation efficiency. Therefore, designing a soil pollution remediation device with better remediation effect and higher remediation efficiency for contaminated soil has become an urgent problem to be solved. Utility Model Content

[0003] The utility model aims to solve the above technical problems and provides a soil pollution repair device combining microbial electrochemical technology with plants.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A soil pollution remediation device combining microbial electrochemical technology with plants, comprising a plurality of positive electrode plates, a plurality of negative electrode plates, a constant potential instrument, remediation plants, remediation microorganisms and an electrode plate insertion device; the positive electrode plates and the negative electrode plates are inserted into the soil to be remediated at intervals, each of the positive electrode plates and the negative electrode plates is connected to the constant potential instrument, the remediation plants are planted between the positive electrode plates and the negative electrode plates, and the remediation microorganisms are sprayed and infiltrated into the soil to be remediated; the electrode plate insertion device comprises a steel plate, a mounting frame, a lifting motor, an electrode plate pressing plate and a pressing plate limiting component, the steel plate is connected to the positive electrode plate or the negative electrode plate in an up-and-down sliding manner, the steel plate is connected to the mounting frame in an up-and-down sliding manner, the lifting motor is connected to the steel plate through a transmission mechanism to drive the steel plate to lift, the electrode plate pressing plate is connected to the mounting frame through a hinge rotation, when the electrode plate pressing plate is hanging down, the electrode plate pressing plate corresponds to the positive electrode plate or the negative electrode plate in a vertical position, and the pressing plate limiting component is installed on the mounting frame and is located below the electrode plate pressing plate.

[0006] As a preferred technical solution, the lower end of the steel plate is gradually widened from bottom to top.

[0007] As a preferred technical solution, the electrode plate insertion device also includes an insertion handle, and the insertion handle is fixedly connected to the mounting frame.

[0008] As a preferred technical solution, the transmission mechanism includes a nut and a screw, the output shaft of the lifting motor is fixedly connected to the screw, the steel plate is fixedly connected to the nut, and the nut is threadedly connected to the screw.

[0009] As a preferred technical solution, the pressure plate limiting component includes a limiting rod and two hanging ears, the two hanging ears are fixedly connected to the two sides of the mounting frame, and the limiting rod is inserted into the two hanging ears.

[0010] After adopting the above technical solution, the utility model has the following advantages:

[0011] (1) The utility model adopts electrochemical remediation of contaminated soil. Electrochemical remediation is a technology that uses electrochemical processes to remove pollutants from contaminated soil. Its principle is based on the principle of electrolysis: the contaminated soil is used as an electrolytic cell, and by applying current, a redox reaction occurs between electrodes, thereby degrading or removing pollutants in the soil. During the electrochemical remediation process, the pollutants undergo the following reactions: anode reaction, the pollutants are oxidized and release electrons; cathode reaction, the electrons are accepted by the reducing agent (usually water or oxygen) to generate hydrogen or hydroxide ions. These reactions produce redox conditions, which promote the degradation or passivation of pollutants.

[0012] (2) The utility model combines plants and anaerobic microorganisms to repair soil. The plant rhizosphere is a complex area of ​​plant-soil-microorganism interaction, and the microorganisms therein have a very important influence on plants in the process of repairing heavy metal-contaminated soil. Microorganisms can change the physical and chemical properties of the soil and thus change the form of heavy metals. They can also secrete organic acids, surfactants, etc. to change the form of heavy metals, making it easier for plants to absorb soil heavy metals, thereby improving the efficiency of plant repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a soil pollution remediation device combining microbial electrochemical technology with plants;

[0014] Figure 2 This is a schematic diagram of the structure of the electrode plate insertion device. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 1 As shown, a soil pollution remediation device combining microbial electrochemical technology with plants comprises a plurality of positive electrode plates 1, a plurality of negative electrode plates 2, a constant potential instrument 3, remediation plants 4, remediation microorganisms 5 and an electrode plate insertion device.

[0017] The positive electrode plate 1 and the negative electrode plate 2 are spaced apart (Equal spacing) Inserted into the soil to be repaired, each of the positive electrode plate 1 and the negative electrode plate 2 is connected to the constant potential instrument 3, the repair plant 4 is planted between the positive electrode plate 1 and the negative electrode plate 2, and the repair microorganism 5 is sprayed and infiltrated into the soil to be repaired.

[0018] The remediation plant 4 may be iris. The remediation microorganism 5 may be aerobic bacteria, anaerobic bacteria and facultative bacteria. Aerobic bacteria: degrade organic matter, such as polycyclic aromatic hydrocarbons and chlorinated hydrocarbons; anaerobic bacteria: degrade heavy metals and nitroaromatic compounds; facultative bacteria: can degrade pollutants under both aerobic and anaerobic conditions.

[0019] The positive electrode plate 1 and the negative electrode plate 2 can be made of graphite electrode plates, metal electrode plates (such as iron, aluminum) and mixed electrode plates (such as activated carbon electrodes), and their advantages are as follows: graphite electrode plates: good conductivity, corrosion resistance, suitable for removing organic pollutants; metal electrode plates: can be used as sacrificial anodes, provide a source of electrons, suitable for removing heavy metals; mixed electrode plates: have the characteristics of adsorption and electrochemical activity, suitable for removing various pollutants. Metal electrode plates are prone to bending and deformation during the insertion process of soil, and graphite electrode plates and activated carbon electrodes are prone to breakage during the insertion process of soil, so an electrode plate insertion device is used to assist the insertion of the electrode plate to ensure that the electrode plate does not bend or break during the insertion process.

[0020] In this embodiment, the positive electrode plate 1 and the negative electrode plate 2 are metal electrode plates, and a coating with excellent conductivity and corrosion resistance is electroplated on the metal electrode plates, and the coating can be made of titanium. The advantage is that after a repair project is completed, the electrode plates can be taken out and reused, saving costs.

[0021] like Figure 2 As shown, the electrode plate insertion device includes a steel plate 6, a mounting frame 7, a lifting motor 8, an electrode plate pressing plate 9, a pressing plate limiting component and an insertion handle 10.

[0022] The steel plate 6 is connected to the positive electrode plate 1 or the negative electrode plate 2 by sliding up and down, and the steel plate 6 is connected to the mounting frame 7 by sliding up and down. The upper part of the steel plate 6 is kept in uniform thickness, which saves time for processing the steel plate and is convenient for the operation of the electrode plate insertion device. The lower end of the steel plate 6 is gradually widened from bottom to top, and when the lower end of the steel plate 6 is inserted into the soil, it plays a guiding role, which facilitates the insertion of the steel plate 6 into the soil.

[0023] The lifting motor 8 is connected to the steel plate 6 through a transmission mechanism to drive the steel plate 6 to lift and lower. In this embodiment, the transmission mechanism includes a nut and a screw rod. The output shaft of the lifting motor 8 is fixedly connected to the screw rod, the steel plate 6 is fixedly connected to the nut, and the nut is threadedly connected to the screw rod.

[0024] The electrode plate pressing plate 9 is rotatably connected to the mounting frame 7 by a hinge. When the electrode plate pressing plate 9 is hanging down, the electrode plate pressing plate 9 corresponds to the positive electrode plate 1 or the negative electrode plate 2 in a vertical position. The pressing plate limiting component is installed on the mounting frame 7 and is located below the electrode plate pressing plate 9. In this embodiment, the pressing plate limiting component includes a limiting rod 11 and two hanging ears 12. The two hanging ears 12 are fixedly connected to both sides of the mounting frame 7, and the limiting rod 11 is inserted into the two hanging ears 12.

[0025] The insertion handle 10 is fixedly connected to the mounting frame 7, so as to facilitate holding the electrode plate insertion device.

[0026] After the steel plate 6 is pulled out, a gap is formed in the soil. After the nutrient solution containing the repair microorganisms 5 is sprayed, the soil will fill the gap formed after the steel plate 6 is pulled out. Before the gap is filled, the electrode plate is temporarily fixed to prevent the electrode plate from tilting.

[0027] The soil pollution remediation device combining microbial electrochemical technology with plants is used as follows:

[0028] 1. Insert the positive electrode plate 1 and the negative electrode plate 2 into the soil to be repaired at intervals;

[0029] (1) Insert the positive electrode plate 1 or the negative electrode plate 2 into the steel plate 6;

[0030] (2) Pressing the insertion handle 10, so that the steel plate 6 and the positive electrode plate 1 or the negative electrode plate 2 are inserted into the soil to be repaired;

[0031] (3) Remove the limiting rod 11, so that the electrode plate pressing plate 9 falls down, and the lower end of the electrode plate pressing plate 9 presses against the positive electrode plate 1 or the negative electrode plate 2;

[0032] (4) Start the lifting motor 8, so that the steel plate 6 rises along the mounting frame 7, and the positive electrode plate 1 or the negative electrode plate 2 is pressed by the electrode plate pressing plate 9 and stays in the soil;

[0033] 2. Planting the restoration plant 4 between the positive electrode plate 1 and the negative electrode plate 2;

[0034] 3. Spray irrigate with nutrient solution containing repair microorganisms 5.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A soil pollution remediation device combining microbial electrochemical technology with plants, characterized in that: A plurality of positive electrode plates, a plurality of negative electrode plates, a constant potential instrument, a repair plant, a repair microorganism and an electrode plate insertion device; the positive electrode plates and the negative electrode plates are inserted into the soil to be repaired at intervals, each of the positive electrode plates and the negative electrode plates is connected to the constant potential instrument, the repair plant is planted between the positive electrode plates and the negative electrode plates, and the repair microorganism is sprayed and infiltrated into the soil to be repaired; the electrode plate insertion device comprises a steel plate, a mounting frame, a lifting motor, an electrode plate pressing plate and a pressing plate limiting component, the steel plate is connected to the positive electrode plate or the negative electrode plate for sliding up and down, the steel plate is connected to the mounting frame for sliding up and down, the lifting motor is connected to the steel plate through a transmission mechanism to drive the steel plate to lift and lower, the electrode plate pressing plate is rotatably connected to the mounting frame through a hinge, when the electrode plate pressing plate is hanging down, the electrode plate pressing plate corresponds to the positive electrode plate or the negative electrode plate in a vertical position, and the pressing plate limiting component is installed on the mounting frame and is located below the electrode plate pressing plate.

2. The soil pollution remediation device combining microbial electrochemical technology and plants according to claim 1 is characterized in that: The lower end of the steel plate is gradually widened from bottom to top.

3. The soil pollution remediation device combining microbial electrochemical technology and plants according to claim 1 is characterized in that: The electrode plate insertion device also includes an insertion handle, and the insertion handle is fixedly connected to the mounting frame.

4. The soil pollution remediation device combining microbial electrochemical technology and plants according to claim 1 is characterized in that: The transmission mechanism comprises a nut and a screw rod, the output shaft of the lifting motor is fixedly connected to the screw rod, the steel plate is fixedly connected to the nut, and the nut is threadedly connected to the screw rod.

5. The soil pollution remediation device combining microbial electrochemical technology and plants according to claim 1 is characterized in that: The pressure plate limiting component includes a limiting rod and two hanging ears, the two hanging ears are fixedly connected to the two sides of the mounting frame, and the limiting rod is inserted into the two hanging ears.

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