A method, system, and storage medium for limiting ion diffusion in soil

Abstract

The application discloses a method, system and storage medium for limiting ion diffusion in soil, and relates to the technical field of soil treatment. The method comprises the following steps: obtaining soil information of soil in a target soil area; detecting a diffusion center and a diffusion range of a pollution ion in the target soil area based on the soil information; delineating a closed-loop isolation belt in the target soil area in combination with the diffusion center, the diffusion range and the soil information; arranging a plurality of electrode devices on both sides of the closed-loop isolation belt, and forming an electrolytic electric field in the soil in the closed-loop isolation belt when the plurality of electrode devices are started; and starting all the electrode devices to limit diffusion of the pollution ion in the soil where the closed-loop isolation belt is located to outside the closed-loop isolation belt. The application has the effect of limiting soil pollution diffusion and reducing construction amount and construction cost.

Description

Technical Field

[0001] This application relates to the field of soil remediation technology, and in particular to a method, system and storage medium for limiting ion diffusion in soil. Background Technology

[0002] Due to rapid population growth and industrial development, solid waste is constantly being piled up and dumped onto the soil surface, harmful wastewater is constantly seeping into the soil, and harmful gases and dust in the atmosphere are constantly falling into the soil with rainwater. When the soil contains too many harmful substances, exceeding the soil's self-purification capacity, it will cause changes in the soil's composition, structure, and function, inhibiting microbial activity. The gradual accumulation of harmful substances or their decomposition products in the soil will cause soil pollution.

[0003] The quality of contaminated soil will continue to decline, and the yield and quality of crops planted in contaminated soil will also decrease. More seriously, soil has a bioaccumulation effect on pollutants; some highly toxic pollutants, such as mercury and cadmium, accumulate in crop fruits, which can easily cause poisoning in humans or livestock. However, the remediation of soil pollution requires a long period of time, so it is necessary to first adopt some measures to control the spread of pollutants in the soil.

[0004] In related technologies, the site conditions of the contaminated soil can be examined first, and then a ring-shaped water-stop curtain can be constructed in combination with the site conditions and the extent of the contaminated soil. The water-stop curtain can be used to surround the contaminated soil, thereby physically blocking the pollutants in the contaminated soil and preventing the pollutants from continuing to spread and contaminate more soil.

[0005] Regarding the aforementioned technologies, the inventors believe that the following drawbacks exist: the construction of a water-stop curtain requires planning the curtain boundary, excavating a foundation pit according to the boundary, and finally pouring cement to form the water-stop curtain. The entire construction process involves a large amount of work and has high construction costs. Summary of the Invention

[0006] To address the drawbacks of requiring extensive engineering work and incurring high costs in limiting the diffusion of soil pollutants, this application provides a method, system, and storage medium for limiting the diffusion of ions in soil.

[0007] In a first aspect, this application provides a method for limiting ion diffusion in soil, comprising the following steps:

[0008] Obtain soil information for the target soil region;

[0009] Based on the soil information, the diffusion centers and diffusion ranges of pollutant ions in the target soil area are detected;

[0010] By combining the diffusion center, the diffusion range, and the soil information, a closed-loop isolation zone is delineated in the target soil area;

[0011] Multiple electrode devices are arranged on both sides of the closed-loop isolation zone. When the multiple electrode devices are activated, an electrolytic electric field is formed in the soil within the closed-loop isolation zone.

[0012] Activate all of the electrode devices to limit the diffusion of the pollutant ions in the soil where the closed-loop isolation zone is located out of the closed-loop isolation zone.

[0013] By adopting the above technical solution, soil information in the target soil area can be obtained first. Then, based on this soil information, the diffusion center and range of pollutant ions can be monitored. Based on all the acquired data, a closed-loop isolation zone can be delineated within the target soil area. Electrode devices can then be arranged on both sides of the closed-loop isolation zone, and all devices can be activated to create an electrolytic electric field in the soil. Driven by electric force, pollutant ions in the soil surrounded by the closed-loop isolation zone will be restricted from moving into the electrolytic electric field, thus preventing the pollutant ions from diffusing into the soil outside the closed-loop isolation zone. Compared to physical isolation methods such as water-stop curtains, using electrode devices to create an electrolytic electric field to restrict the diffusion of pollutant ions is less time-consuming and has a lower overall cost.

[0014] Optionally, the step of delineating a closed-loop isolation zone in the target soil area by combining the diffusion center, the diffusion range, and the soil information includes the following steps:

[0015] Based on the soil information, several restricted areas are delineated in the target soil region;

[0016] By combining the diffusion center and the diffusion range, an initial isolation zone is delineated in the target soil area;

[0017] Determine whether there is an overlap between the initial isolation zone and the restricted area;

[0018] If the initial isolation zone and the restricted area do not overlap, then the initial isolation zone is used as a closed-loop isolation zone.

[0019] If the initial isolation zone and the restricted area overlap, then the area of ​​the overlapping area is calculated.

[0020] The initial isolation zone is adjusted by combining the area of ​​the region and the target restricted area where the overlapping region is located, to obtain the closed-loop isolation zone.

[0021] By adopting the above technical solution, an initial isolation zone can be delineated based on the diffusion center and diffusion range of pollutant ions. Since there may be restrictive areas such as rock strata in the target soil area that are not convenient for the placement of electrode devices, it is necessary to delineate all restrictive areas based on soil information, identify the overlapping areas between the restrictive areas and the initial isolation zone, and adjust the initial isolation zone according to the area of ​​the overlapping areas, so as to make the soil in which the isolation zone is located as convenient as possible for the placement of electrode devices, and finally obtain the adjusted closed-loop isolation zone.

[0022] Optionally, adjusting the initial isolation zone by combining the area of ​​the region and the target restriction area where the overlapping region is located to obtain the closed-loop isolation zone includes the following steps:

[0023] Determine whether the area of ​​the region exceeds a preset area threshold;

[0024] If the area of ​​the region does not exceed the area threshold, the initial isolation zone will not be adjusted, and the initial isolation zone will be used as the closed-loop isolation zone.

[0025] If the area of ​​the region exceeds the area threshold, then the outer boundary restriction area outside the initial isolation zone in the target restriction area where the overlapping region is located is extracted;

[0026] Identify the regional boundary of the aforementioned restricted area;

[0027] The region boundary is smoothed to obtain a smoothed region boundary.

[0028] Draw an outer isolation zone based on the boundary of the smooth region;

[0029] Replace the isolation strip located in the overlapping area of ​​the initial isolation strip with the outer isolation strip;

[0030] The outer isolation zone and the remaining initial isolation zone are connected to form the closed-loop isolation zone.

[0031] By adopting the above technical solution, the area of ​​the overlapping region is judged by a preset area threshold. When the area is less than or equal to the area threshold, it means that the small number of overlapping restricted areas are unlikely to affect the arrangement of the electrode device, so the initial isolation zone does not need to be adjusted. When the area is greater than the area threshold, the isolation zone needs to be adjusted according to the area boundary of the restricted area so that the isolation zone avoids the restricted area, which is beneficial to the subsequent arrangement of the electrode device.

[0032] Optionally, the electrode device includes a power supply module, a first electrode device, and a second electrode device. The step of arranging multiple electrode devices on both sides of the closed-loop isolation strip includes the following steps:

[0033] Multiple first electrode devices are arranged in the soil on one side of the closed-loop isolation zone;

[0034] Multiple second electrode devices are arranged in the soil on the other side of the closed-loop isolation zone, with the number of first electrode devices and second electrode devices being the same and their electrodes being opposite.

[0035] The power supply module supplies power to all the first electrode devices and all the second electrode devices.

[0036] By adopting the above technical solution, an electrolytic electric field is formed in the soil of the closed-loop isolation zone by arranging electrode devices with opposite electrodes on both sides of the closed-loop isolation zone. When pollutant ions move into the electrolytic electric field, the electrodynamic force between the electrolytic electric field and the pollutant ions restricts the movement of pollutant ions in the soil of the closed-loop isolation zone, thereby achieving the effect of limiting the diffusion of pollutant ions.

[0037] Optionally, the power supply voltage of the power supply module is less than 1.25V.

[0038] By adopting the above technical solution, the pollutant ions exist in the soil solution of the polluted soil. The main purpose of arranging the electrode device is to form an electrolytic electric field to ionize the pollutant ions. Theoretically, the minimum voltage required for electrolyzing the soil solution is only 1.23V. Therefore, limiting the power supply voltage to a low voltage range of less than 1.25V can not only ensure the ionization effect, but also improve the safety of the ionization process.

[0039] Optionally, the step of detecting the diffusion center and diffusion range of pollutant ions in the target soil area based on the soil information includes the following steps:

[0040] Based on the soil information, multiple control soil regions were selected to compare with the target soil regions;

[0041] First soil data were obtained for soils in all of the control soil regions.

[0042] Based on the first soil data, target control soil regions are selected from all the control soil regions;

[0043] Obtain secondary soil data for the soil in the target soil region;

[0044] The pollution status of pollutant ions in the target soil area is analyzed by combining the first soil data and the second soil data of the target control soil area, and the diffusion center and diffusion range of the pollutant ions in the target soil area are determined.

[0045] By adopting the above technical solution, multiple control soil areas that can be used for comparison can be selected based on soil information. Then, based on the first soil data of the soil in the control soil areas, the most suitable target control soil area for comparison can be selected. Therefore, the first soil data of the target control soil area can be used as the standard value. Based on the second soil data of the soil in the target soil area, the pollution status of the target soil area can be analyzed, and the diffusion center and diffusion range of pollutant ions can be determined.

[0046] Optionally, the first soil data includes a first electrical conductivity value and a first in-phase value, and the step of selecting the target control soil region from all the control soil regions based on the first soil data includes the following steps:

[0047] Determine whether the coefficient of variation of the first conductivity value is lower than a preset first coefficient threshold.

[0048] If the coefficient of variation of the first conductivity value is lower than the first coefficient threshold, then determine whether the coefficient of variation of the first in-phase value corresponding to the control soil area is lower than the preset second coefficient threshold.

[0049] If the coefficient of variation of the first in-phase value is lower than the second coefficient threshold, then the corresponding control soil area is marked as a pre-selected soil area.

[0050] The number of the pre-selected soil regions is determined to be greater than or equal to 1;

[0051] If the number of pre-selected soil regions is equal to 1, then the pre-selected soil region is used as the target control soil region;

[0052] If the number of the pre-selected soil regions is greater than 1, then the comprehensive coefficient of variation for all the pre-selected soil regions is calculated based on the first soil data.

[0053] The minimum value among all the aforementioned combined coefficients of variation is selected as the target coefficient of variation;

[0054] The pre-selected soil region corresponding to the target coefficient of variation is used as the target control soil region.

[0055] By adopting the above technical solution, the first soil data is first screened by combining two preset coefficients of variation to select pre-selected soil areas. If there is only one pre-selected soil area, it is directly used as the target control soil area. If there are multiple pre-selected soil areas, the comprehensive coefficient of variation of the pre-selected soil areas needs to be calculated. The lower the comprehensive coefficient of variation, the lower the dispersion of the first soil data, and the better the soil condition of the corresponding pre-selected soil area. Therefore, the pre-selected soil area with the smallest comprehensive coefficient of variation is used as the target control soil area.

[0056] Optionally, the second soil data includes a second electrical conductivity value and a second in-phase value. The step of combining the first and second soil data of the target soil area to analyze the pollution status of pollutant ions in the target soil area and determining the diffusion center and diffusion range of the pollutant ions in the target soil area includes the following steps:

[0057] Calculate the mean conductivity of the first conductivity value and the mean phase of the first in-phase value;

[0058] The target electrical conductivity value of the target soil region is calculated by combining the average electrical conductivity value and the second electrical conductivity value.

[0059] The target in-phase value of the target soil region is calculated by combining the mean in-phase value and the second in-phase value.

[0060] Based on the target conductivity value and the target in-phase value, draw a conductivity-in-phase value distribution map of the target soil region;

[0061] The diffusion center and diffusion range of the pollutant ions in the target soil region are determined based on the conductivity-phase value distribution map.

[0062] By adopting the above technical solution, the target conductivity value is calculated by combining the first conductivity value and the second conductivity value, and the target in-phase value is calculated by combining the first in-phase value and the second in-phase value. Thus, a conductivity-in-phase value distribution map of the target soil area can be drawn based on the target conductivity value and the target in-phase value, and the diffusion center and diffusion range of pollutant ions can be determined based on the conductivity-in-phase value distribution map.

[0063] Secondly, this application also provides a system for limiting ion diffusion in soil, including a memory, a processor, and a program stored in the memory and executable on the processor, which, when loaded and executed by the processor, implements a method for limiting ion diffusion in soil as described in the first aspect.

[0064] By employing the above technical solution, soil information in the target soil area can be obtained first through program retrieval. Then, based on this soil information, the diffusion center and range of pollutant ions can be monitored. Based on all the acquired data, a closed-loop isolation zone can be delineated within the target soil area. Electrode devices can then be arranged on both sides of the closed-loop isolation zone, and all devices can be activated to create an electrolytic electric field in the soil. Driven by electric force, pollutant ions in the soil surrounded by the closed-loop isolation zone will be restricted from moving into the electrolytic electric field, thus preventing the pollutant ions from diffusing into the soil outside the closed-loop isolation zone. Compared to physical isolation methods such as water-stop curtains, using electrode devices to create an electrolytic electric field to restrict the diffusion of pollutant ions is less time-consuming and has a lower overall cost.

[0065] Thirdly, this application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to implement a method for limiting ion diffusion in soil as described in the first aspect.

[0066] By employing the above technical solution, soil information in the target soil area can be obtained first through program retrieval. Then, based on this soil information, the diffusion center and range of pollutant ions can be monitored. Based on all the acquired data, a closed-loop isolation zone can be delineated within the target soil area. Electrode devices can then be arranged on both sides of the closed-loop isolation zone, and all devices can be activated to create an electrolytic electric field in the soil. Driven by electric force, pollutant ions in the soil surrounded by the closed-loop isolation zone will be restricted from moving into the electrolytic electric field, thus preventing the pollutant ions from diffusing into the soil outside the closed-loop isolation zone. Compared to physical isolation methods such as water-stop curtains, using electrode devices to create an electrolytic electric field to restrict the diffusion of pollutant ions is less time-consuming and has a lower overall cost.

[0067] In summary, this application includes at least one of the following beneficial technical effects:

[0068] 1. Soil information in the target soil area can be obtained first. Based on this information, the diffusion center and range of pollutant ions can be monitored. A closed-loop isolation zone can be delineated within the target soil area using all acquired data. Electrode devices can then be placed on both sides of the closed-loop isolation zone, and all devices can be activated to create an electrolytic electric field in the soil. Driven by electric force, pollutant ions in the soil surrounded by the closed-loop isolation zone will be restricted from moving into the electrolytic electric field, thus preventing the pollutant ions from diffusing into the soil outside the closed-loop isolation zone. Compared to physical isolation methods such as water-stop curtains, using electrode devices to create an electrolytic electric field to restrict the diffusion of pollutant ions is less time-consuming and has a lower overall cost.

[0069] 2. Pollutant ions exist in the soil solution of polluted soil. The main purpose of arranging the electrode device is to form an electrolytic electric field to ionize the pollutant ions. Theoretically, the minimum voltage required for electrolyzing the soil solution is only 1.23V. Therefore, limiting the power supply voltage to a low voltage range of less than 1.25V can ensure the ionization effect and improve the safety of the ionization process. Attached Figure Description

[0070] Figure 1 This is a flowchart illustrating one embodiment of the method for limiting ion diffusion in soil according to this application.

[0071] Figure 2 This is a flowchart illustrating one embodiment of the method for limiting ion diffusion in soil according to this application.

[0072] Figure 3 This is a flowchart illustrating one embodiment of the method for limiting ion diffusion in soil according to this application.

[0073] Figure 4 This is a flowchart illustrating one embodiment of the method for limiting ion diffusion in soil according to this application.

[0074] Figure 5 This is a flowchart illustrating one embodiment of the method for limiting ion diffusion in soil according to this application.

[0075] Figure 6 This is a flowchart illustrating one embodiment of the method for limiting ion diffusion in soil according to this application.

[0076] Figure 7 This is a flowchart illustrating one embodiment of the method for limiting ion diffusion in soil according to this application. Detailed Implementation

[0077] The following is in conjunction with the appendix Figures 1 to 7This application will be described in further detail.

[0078] This application discloses a method for limiting ion diffusion in soil.

[0079] Reference Figure 1 Methods to limit ion diffusion in soil include the following steps:

[0080] S101. Obtain soil information for the target soil region.

[0081] In the initial contaminated soil exploration process, target soil areas containing contaminated soil are marked. The extent of these target soil areas is estimated based on the results of the initial exploration. Soil information mainly includes soil density, soil porosity, and soil texture. By testing the soil in the target soil areas, this soil information can be detected.

[0082] S102. Based on soil information, detect the diffusion center and diffusion range of pollutant ions in the target soil area.

[0083] Based on soil information, areas with similar soil conditions to the target soil area and that are basically unpolluted can be selected as control areas. Thus, by detecting and comparing pollutants, the diffusion centers and diffusion ranges of pollutant ions in the target soil area can be identified.

[0084] S103. Delineate a closed-loop isolation zone in the target soil area by combining the diffusion center, diffusion range, and soil information.

[0085] First, a basic isolation zone is delineated based on the diffusion center and diffusion range of pollutant ions. However, since electrode devices need to be placed around the isolation zone and are located in the soil, the delineation of the isolation zone needs to avoid some hard soils. The isolation zone can be adjusted based on soil information, and finally a closed-loop isolation zone is delineated.

[0086] S104. Multiple electrode devices are arranged on both sides of the closed-loop isolation zone. When the multiple electrode devices are started, an electrolytic electric field is formed in the soil within the closed-loop isolation zone.

[0087] The electrode device is divided into a positive electrode electrolysis device and a negative electrode electrolysis device. The positive electrode electrolysis device includes a positive electrode well, and the negative electrode electrolysis device includes a negative electrode well. A positive electrode electrolysis plate is installed in the positive electrode well, and a negative electrode electrolysis plate is installed in the negative electrode well. Electrolytic solution is installed in both the positive electrode well and the negative electrode well. The positive electrode electrolysis device and the negative electrode electrolysis device are respectively arranged on both sides of the closed-loop isolation zone. When the electrode device is started, an electrolytic electric field can be formed in the soil within the closed-loop isolation zone.

[0088] S105. Activate all electrode devices to limit the diffusion of pollutant ions in the soil where the closed-loop isolation zone is located to the outside of the closed-loop isolation zone.

[0089] When all electrode devices are activated, an electrolytic electric field is formed in the soil where the closed-loop isolation zone is located. The electrolytic electric field ionizes the pollutant ions in the soil solution and restricts the movement of the pollutant ions in the electric field under the action of the electric field force, thereby limiting the diffusion of pollutant ions outside the closed-loop isolation zone.

[0090] The implementation principle of this embodiment is as follows:

[0091] Soil information within the target soil area can be obtained first. Based on this information, the diffusion center and range of pollutant ions can be monitored. Using all the acquired data, a closed-loop isolation zone can be delineated within the target soil area. Electrode devices can then be deployed on both sides of this zone, and activation of all devices creates an electrolytic electric field in the soil. Driven by electric force, pollutant ions within the soil surrounded by the closed-loop isolation zone will be restricted from moving into the electrolytic electric field, thus preventing their diffusion into the soil outside the isolation zone. Compared to physical isolation methods such as water-stop curtains, using electrode devices to create an electrolytic electric field to limit pollutant ion diffusion is faster and less costly.

[0092] In one embodiment of the present application, reference is made to Figure 2 Step S103 specifically includes the following steps:

[0093] S201. Delineate several restricted areas in the target soil region based on soil information.

[0094] Among them, the soil density and soil texture in the soil information are analyzed to determine the overall soil hardness of the target soil area. Based on the preset threshold, a restricted area with harder soil is divided. If an electrode device is to be placed in the restricted area, it will generate a larger amount of engineering work and incur higher construction costs than placing an electrode device in the unrestricted area.

[0095] S202. Delineate an initial isolation zone in the target soil area by combining the diffusion center and diffusion range.

[0096] The process involves calculating a first distance from the diffusion center to the boundary of the diffusion range, then subtracting a preset interval distance from this first distance to obtain a second distance. This interval distance can be preset based on the magnitude of the electric field generated by the electrode devices to be subsequently deployed. Two circles are drawn with the diffusion center as the center and the first and second distances as radii, respectively. The annulus formed by these two circles constitutes the initial isolation zone; therefore, the interval distance is also the width of the initial isolation zone.

[0097] S203. Determine whether there is an overlapping area between the initial isolation zone and the restricted area. If there is no overlapping area between the initial isolation zone and the restricted area, proceed to step S204; if there is an overlapping area between the initial isolation zone and the restricted area, proceed to step S205.

[0098] The overlapping area is the area where the initial isolation zone covers the target soil area and the restricted area covers the target soil area. A rectangular coordinate system can be constructed based on any point in the target soil area. Then, the first coordinates of all points in the initial isolation zone and the second coordinates of all points in the restricted area can be obtained according to the rectangular coordinate system. Points with the same first and second coordinates are summarized, and the set of summarized points is all the points in the overlapping area.

[0099] S204. Use the initial isolation zone as a closed-loop isolation zone.

[0100] S205. Calculate the area of ​​the overlapping region.

[0101] Since the overlapping area is also part of the initial isolation zone, and the initial isolation zone is a ring, the area of ​​the overlapping area can be calculated according to the perpendicular bisector theorem of a circle and the preset arc area calculation formula.

[0102] S206. Adjust the initial isolation zone by combining the area of ​​the region and the target restricted area where the overlapping area is located to obtain a closed-loop isolation zone.

[0103] The implementation principle of this embodiment is as follows:

[0104] An initial isolation zone can be delineated based on the diffusion center and diffusion range of pollutant ions. Since there may be restrictive areas such as rock strata in the target soil area that are not conducive to the placement of electrode devices, it is necessary to delineate all restrictive areas based on soil information, identify the overlapping areas between the restrictive areas and the initial isolation zone, and adjust the initial isolation zone according to the area of ​​the overlapping areas, so as to make the soil in which the isolation zone is located as convenient as possible for the placement of electrode devices, and finally obtain the adjusted closed-loop isolation zone.

[0105] In one embodiment of the present application, reference is made to Figure 3 Step S206 specifically includes the following steps:

[0106] S301. Determine whether the area of ​​the region exceeds the preset area threshold. If the area of ​​the region does not exceed the area threshold, proceed to step S302; if the area of ​​the region exceeds the area threshold, proceed to step S303.

[0107] Electrode devices are typically arranged along an isolation zone at preset intervals. These intervals are predetermined based on the requirements for subsequent electrode placement. The area of ​​the isolation zone between adjacent electrode devices is calculated using the preset intervals and the width of the initial isolation zone, and this calculated area serves as a preset area threshold. Therefore, when the area does not exceed the area threshold, overlapping areas generally do not affect the placement of subsequent electrode devices. However, when the area of ​​the overlapping zone exceeds the area threshold, some electrode devices will inevitably be placed in the overlapping area, increasing the workload and cost. Therefore, the initial isolation zone can be adjusted to avoid overlapping areas. Although adjusting the initial isolation zone also increases the number of electrode devices and costs, the increase is much smaller than the cost of forcibly placing electrode devices in restricted areas.

[0108] S302. Do not adjust the initial isolation zone, and use the initial isolation zone as a closed-loop isolation zone.

[0109] S303. Extract the outer boundary restricted area located outside the initial isolation zone within the target restricted area where the overlapping area is located.

[0110] The restricted area located outside the ring formed by the initial isolation zone is defined as the outer restricted area.

[0111] S304. Identify the area boundaries of restricted areas outside the designated boundaries.

[0112] Among them, the boundary of the restricted area outside the boundary is identified and extracted by the edge extraction algorithm.

[0113] S305. Smooth the region boundary to obtain a smooth region boundary.

[0114] S306. Draw the outer isolation zone based on the smooth region boundary.

[0115] Specifically, an outer isolation zone boundary is drawn outside the target restricted area based on the smooth region boundary. The distance between any point on the outer isolation zone boundary and the corresponding point on the smooth region boundary is always equal to the width of the initial isolation zone. The isolation zone formed by the outer isolation zone boundary and the smooth region boundary is the outer isolation zone.

[0116] S307. Replace the outer boundary isolation zone with the isolation zone located in the overlapping area of ​​the initial isolation zone.

[0117] S308. Connect the outer isolation zone and the remaining initial isolation zone to obtain a closed-loop isolation zone.

[0118] The closed-loop isolation zone remains in a closed-loop state at all times.

[0119] The implementation principle of this embodiment is as follows:

[0120] The area of ​​the overlapping region is judged by a preset area threshold. When the area is less than or equal to the area threshold, it means that the small number of overlapping restricted areas are unlikely to affect the arrangement of the electrode device, so the initial isolation zone does not need to be adjusted. When the area is greater than the area threshold, the isolation zone needs to be adjusted according to the area boundary of the restricted area so that the isolation zone avoids the restricted area, which is beneficial to the subsequent arrangement of the electrode device.

[0121] In another embodiment of this application, the electrode device includes a power supply module, a first electrode device, and a second electrode device, as shown below. Figure 4 Step S104 specifically includes the following steps:

[0122] S401. Multiple first electrode devices are arranged in the soil on one side of the closed-loop isolation zone.

[0123] Among them, multiple first electrode devices are arranged at certain intervals along the boundary on the same side of the closed-loop isolation zone.

[0124] S402. Arrange multiple second electrode devices in the soil on the other side of the closed-loop isolation zone.

[0125] The number of first electrode devices and second electrode devices are the same and their electrodes are opposite, and the distance between any second electrode device and its nearest first electrode device is equal to the width of the closed-loop isolation zone.

[0126] S403. Power is supplied to all first electrode devices and all second electrode devices via the power supply module.

[0127] The power supply module has a power supply voltage of less than 1.25V.

[0128] The implementation principle of this embodiment is as follows:

[0129] By arranging electrode devices with opposite electrodes on both sides of the closed-loop isolation zone, an electrolytic electric field is formed in the soil within the isolation zone. When pollutant ions move into this field, the electrodynamic force between the field and the ions confines them to the soil within the closed-loop zone, thus limiting their diffusion. Since the pollutant ions are present in the soil solution of the contaminated soil, the electrode devices are primarily used to create the electrolytic electric field to ionize them. Theoretically, the minimum voltage required for electrolyzing the soil solution is only 1.23V. Therefore, limiting the supply voltage to less than 1.25V ensures both effective ionization and improved safety during the process.

[0130] In another embodiment of this application, step S104 may further include the following steps: arranging three layers of electrode devices around a closed-loop isolation strip, with each layer of electrode devices having the same electrodes. The electrodes of the three layers of electrode devices may be positive, negative, and positive in sequence, or negative, positive, and negative in sequence. Power is supplied to all electrode devices through a power supply module, and the power supply voltage of the power supply module is less than 1.25V.

[0131] In another embodiment of the present application, reference is made to Figure 5 Step S102 specifically includes the following steps:

[0132] S501. Based on soil information, select control soil areas for multiple target soil areas.

[0133] The soil conditions and soil structure of the control soil area are basically the same as those of the target soil area, and the control soil area is at a certain distance from the target soil area.

[0134] S502. Obtain the first soil data for the soils in all control soil regions respectively.

[0135] Among them, the first soil data can be obtained by detecting the soil in the control soil area using an electromagnetic induction instrument. The first soil data includes a first conductivity value and a first in-phase value. The first conductivity value can reflect the electrical conductivity of the soil in the control soil area, and the first in-phase value can reflect the magnetic susceptibility of the control soil area.

[0136] S503. Select the target control soil area from all control soil areas based on the first soil data.

[0137] One method is to use the coefficient of variation of the first soil data for screening.

[0138] S504. Obtain second soil data for the soil in the target soil region.

[0139] Among them, the second soil data can be obtained by detecting the soil in the target soil area using an electromagnetic induction instrument. The second soil data includes a second conductivity value and a second in-phase value. The second conductivity value can reflect the electrical conductivity of the soil in the target soil area, and the second in-phase value can reflect the magnetic susceptibility of the target soil area.

[0140] S505. Analyze the pollution status of pollutant ions in the target soil area by combining the first and second soil data of the target control soil area, and determine the diffusion center and diffusion range of pollutant ions in the target soil area.

[0141] The implementation principle of this embodiment is as follows:

[0142] Multiple control soil areas can be selected based on soil information. Then, the target control soil area that is most suitable for comparison can be selected based on the first soil data of the soil in the control soil areas. Therefore, the first soil data of the target control soil area can be used as the standard value. Based on the second soil data of the soil in the target soil area, the pollution status of the target soil area can be analyzed, and the diffusion center and diffusion range of the pollutant ions can be determined.

[0143] In another embodiment of the present application, reference is made to Figure 6 Step S503 specifically includes the following steps:

[0144] S601. Determine whether the coefficient of variation of the first conductivity value is lower than the preset first coefficient threshold. If the coefficient of variation of the first conductivity value is lower than the first coefficient threshold, then execute step S602.

[0145] The coefficient of variation of the first conductivity value can be calculated by dividing the standard deviation of all first conductivity values ​​in the control soil area by the average value of all first conductivity values. If the coefficient of variation of the first conductivity value is not lower than the first coefficient threshold, the corresponding control soil area is screened out. The preset first coefficient threshold is usually 10%.

[0146] S602. Determine whether the coefficient of variation of the first in-phase value of the corresponding control soil area is lower than the preset second coefficient threshold. If the coefficient of variation of the first in-phase value is lower than the second coefficient threshold, then proceed to step S603.

[0147] The coefficient of variation of the first in-phase value can be calculated by dividing the standard deviation of all first in-phase values ​​in the control soil area by the average value of all first in-phase values. If the coefficient of variation of the first in-phase value is not lower than the second coefficient threshold, the corresponding control soil area is screened out. The preset second coefficient threshold is usually 15%.

[0148] S603. Mark the corresponding control soil area as the pre-selected soil area.

[0149] Among them, the first soil data of the pre-selected soil area has a lower dispersion and is more suitable as a control area.

[0150] S604. Determine if the number of pre-selected soil areas is greater than or equal to 1. If the number of pre-selected soil areas is equal to 1, proceed to step S605; if the number of pre-selected soil areas is greater than 1, proceed to step S606.

[0151] If the number of pre-selected soil areas is 0, then the first coefficient threshold and the second coefficient threshold are increased, and steps S601 to S604 are repeated.

[0152] S605. Use the pre-selected soil area as the target control soil area.

[0153] S606. Calculate the comprehensive coefficient of variation for all pre-selected soil regions based on the first soil data.

[0154] The sum of the coefficient of variation of the first conductivity value and the coefficient of variation of the first in-phase value is the comprehensive coefficient of variation of the corresponding pre-selected soil region.

[0155] S607. Select the minimum value among all comprehensive coefficients of variation as the target coefficient of variation.

[0156] The lower the coefficient of variation, the lower the dispersion of the soil data.

[0157] S608. Use the pre-selected soil area corresponding to the target coefficient of variation as the target control soil area.

[0158] The implementation principle of this embodiment is as follows:

[0159] First, the first soil data is screened using two preset coefficients of variation to select pre-selected soil regions. If only one pre-selected soil region is selected, it is directly used as the target control soil region. If multiple pre-selected soil regions are selected, the comprehensive coefficient of variation of the pre-selected soil regions needs to be calculated. The lower the comprehensive coefficient of variation, the lower the dispersion of the first soil data, and the better the soil condition of the corresponding pre-selected soil region. Therefore, the pre-selected soil region with the smallest comprehensive coefficient of variation is used as the target control soil region.

[0160] In one embodiment of the present application, reference is made to Figure 7 Step S505 specifically includes the following steps:

[0161] S701. Calculate the mean conductivity of the first conductivity value and the mean phase of the first in-phase value.

[0162] The average of all first conductivity values ​​measured in the target control soil region is the conductivity mean, and the average of all first in-phase values ​​measured in the target control soil region is the in-phase mean.

[0163] S702. The target electrical conductivity value of the target soil area is calculated by combining the mean electrical conductivity value and the second electrical conductivity value.

[0164] In this step, all the second conductivity values ​​measured in the target soil area are divided by the mean conductivity value to obtain multiple target conductivity values. This step is a normalization process for the second conductivity values.

[0165] S703. The target in-phase value of the target soil area is calculated by combining the mean in-phase value and the second in-phase value.

[0166] In this step, all the second in-phase values ​​measured in the target soil area are divided by the mean in-phase value to obtain multiple target in-phase values. This step is to normalize the second in-phase values.

[0167] S704. Draw a distribution map of conductivity-in-phase values ​​for the target soil region based on the target conductivity value and the target in-phase value.

[0168] The conductivity-in-phase value distribution map includes a contour map of the target conductivity value and a contour map of the target in-phase value. Different regions in the two contour maps are filled with different colors according to different contour lines. The higher the value of the contour line, the darker the color of the corresponding region.

[0169] S705. Determine the diffusion center and diffusion range of pollutant ions in the target soil area based on the conductivity-phase value distribution diagram.

[0170] The process involves overlapping two isopleth maps, resulting in the superposition of all colors in both maps. Image recognition technology is then used to identify the darkest point in the superimposed isopleth map as the diffusion center of the pollutant ions. The diffusion range of the pollutant ions is then delineated using the diffusion center as the center and a preset color threshold as the boundary.

[0171] The implementation principle of this embodiment is as follows:

[0172] The target conductivity value is calculated by combining the first conductivity value and the second conductivity value, and the target in-phase value is calculated by combining the first in-phase value and the second in-phase value. Thus, a conductivity-in-phase value distribution map of the target soil area can be drawn based on the target conductivity value and the target in-phase value, and the diffusion center and diffusion range of pollutant ions can be determined based on the conductivity-in-phase value distribution map.

[0173] This application also discloses a system for limiting ion diffusion in soil, including a memory, a processor, and a program stored in the memory and executable on the processor. This program, when loaded and executed by the processor, can achieve the following: Figures 1 to 7 The image shows a method for limiting ion diffusion in soil.

[0174] The implementation principle of this embodiment is as follows:

[0175] By retrieving the program, soil information in the target soil area can be obtained first. Then, based on this information, the diffusion center and range of pollutant ions can be monitored. Based on all the acquired data, a closed-loop isolation zone can be delineated within the target soil area. Electrode devices can then be placed on both sides of the closed-loop isolation zone, and all devices are activated to create an electrolytic electric field in the soil. Driven by electric force, pollutant ions in the soil surrounded by the closed-loop isolation zone will be restricted from moving into the electrolytic electric field, thus preventing the pollutant ions from diffusing into the soil outside the closed-loop isolation zone. Compared to physical isolation methods such as water-stop curtains, using electrode devices to create an electrolytic electric field to limit the diffusion of pollutant ions is less time-consuming and has a lower overall cost.

[0176] This application also discloses a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the following... Figures 1 to 7 The image shows a method for limiting ion diffusion in soil.

[0177] The implementation principle of this embodiment is as follows:

[0178] By retrieving the program, soil information in the target soil area can be obtained first. Then, based on this information, the diffusion center and range of pollutant ions can be monitored. Based on all the acquired data, a closed-loop isolation zone can be delineated within the target soil area. Electrode devices can then be placed on both sides of the closed-loop isolation zone, and all devices are activated to create an electrolytic electric field in the soil. Driven by electric force, pollutant ions in the soil surrounded by the closed-loop isolation zone will be restricted from moving into the electrolytic electric field, thus preventing the pollutant ions from diffusing into the soil outside the closed-loop isolation zone. Compared to physical isolation methods such as water-stop curtains, using electrode devices to create an electrolytic electric field to limit the diffusion of pollutant ions is less time-consuming and has a lower overall cost.

[0179] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for restricting ion diffusion in soil, characterized in that, Includes the following steps: Obtain soil information for the target soil region; Based on the soil information, the diffusion centers and diffusion ranges of pollutant ions in the target soil area are detected; By combining the diffusion center, the diffusion range, and the soil information, a closed-loop isolation zone is delineated in the target soil area; Multiple electrode devices are arranged on both sides of the closed-loop isolation zone. When the multiple electrode devices are activated, an electrolytic electric field is formed in the soil within the closed-loop isolation zone. Activate all the aforementioned electrode devices to limit the diffusion of the contaminating ions in the soil where the closed-loop isolation zone is located out of the closed-loop isolation zone; The step of delineating a closed-loop isolation zone in the target soil area by combining the diffusion center, the diffusion range, and the soil information includes the following steps: Based on the soil information, several restricted areas are delineated in the target soil region; By combining the diffusion center and the diffusion range, an initial isolation zone is delineated in the target soil area; Determine whether there is an overlap between the initial isolation zone and the restricted area; If the initial isolation zone and the restricted area do not overlap, then the initial isolation zone is used as a closed-loop isolation zone. If the initial isolation zone and the restricted area overlap, then the area of ​​the overlapping area is calculated. The initial isolation zone is adjusted by combining the area of ​​the region and the target restricted area where the overlapping region is located, thus obtaining the closed-loop isolation zone; The step of adjusting the initial isolation zone by combining the area of ​​the region and the target restriction area where the overlapping region is located to obtain the closed-loop isolation zone includes the following steps: Determine whether the area of ​​the region exceeds a preset area threshold; If the area of ​​the region does not exceed the area threshold, the initial isolation zone will not be adjusted, and the initial isolation zone will be used as the closed-loop isolation zone. If the area of ​​the region exceeds the area threshold, then the outer boundary restriction area outside the initial isolation zone in the target restriction area where the overlapping region is located is extracted; Identify the regional boundary of the aforementioned restricted area; The region boundary is smoothed to obtain a smoothed region boundary. Draw an outer isolation zone based on the boundary of the smooth region; Replace the isolation strip located in the overlapping area of ​​the initial isolation strip with the outer isolation strip; The outer isolation zone and the remaining initial isolation zone are connected to form the closed-loop isolation zone.

2. The method for restricting ion diffusion in soil according to claim 1, characterized in that, The electrode device includes a power supply module, a first electrode device, and a second electrode device. The step of arranging multiple electrode devices on both sides of the closed-loop isolation zone includes the following steps: Multiple first electrode devices are arranged in the soil on one side of the closed-loop isolation zone; Multiple second electrode devices are arranged in the soil on the other side of the closed-loop isolation zone, with the number of first electrode devices and second electrode devices being the same and their electrodes being opposite. The power supply module supplies power to all the first electrode devices and all the second electrode devices.

3. The method for restricting ion diffusion in soil according to claim 2, characterized in that: The power supply module has a power supply voltage of less than 1.25V.

4. The method for restricting ion diffusion in soil according to claim 1, characterized in that, The detection of the diffusion centers and diffusion range of pollutant ions in the target soil region based on the soil information includes the following steps: Based on the soil information, multiple control soil regions were selected to compare with the target soil regions; First soil data were obtained for soils in all of the control soil regions. Based on the first soil data, target control soil regions are selected from all the control soil regions; Obtain secondary soil data for the soil in the target soil region; The pollution status of pollutant ions in the target soil area is analyzed by combining the first soil data and the second soil data of the target control soil area, and the diffusion center and diffusion range of the pollutant ions in the target soil area are determined.

5. The method for limiting ion diffusion in soil according to claim 4, characterized in that, The first soil data includes a first electrical conductivity value and a first in-phase value. The step of selecting a target control soil region from all the control soil regions based on the first soil data includes the following steps: Determine whether the coefficient of variation of the first conductivity value is lower than a preset first coefficient threshold. If the coefficient of variation of the first conductivity value is lower than the first coefficient threshold, then determine whether the coefficient of variation of the first in-phase value corresponding to the control soil area is lower than the preset second coefficient threshold. If the coefficient of variation of the first in-phase value is lower than the second coefficient threshold, then the corresponding control soil area is marked as a pre-selected soil area. The number of the pre-selected soil regions is determined to be greater than or equal to 1; If the number of pre-selected soil regions is equal to 1, then the pre-selected soil region is used as the target control soil region; If the number of the pre-selected soil regions is greater than 1, then the comprehensive coefficient of variation for all the pre-selected soil regions is calculated based on the first soil data. The minimum value among all the aforementioned combined coefficients of variation is selected as the target coefficient of variation; The pre-selected soil region corresponding to the target coefficient of variation is used as the target control soil region.

6. The method for restricting ion diffusion in soil according to claim 5, characterized in that, The second soil data includes a second electrical conductivity value and a second in-phase value. The step of combining the first and second soil data of the target soil area to analyze the pollution status of pollutant ions in the target soil area and determining the diffusion center and diffusion range of the pollutant ions in the target soil area includes the following steps: Calculate the mean conductivity of the first conductivity value and the mean phase of the first in-phase value; The target electrical conductivity value of the target soil region is calculated by combining the average electrical conductivity value and the second electrical conductivity value. The target in-phase value of the target soil region is calculated by combining the mean in-phase value and the second in-phase value. Based on the target conductivity value and the target in-phase value, draw a conductivity-in-phase value distribution map of the target soil region; The diffusion center and diffusion range of the pollutant ions in the target soil region are determined based on the conductivity-phase value distribution map.

7. A system for restricting ion diffusion in soil, characterized in that, It includes a memory, a processor, and a program stored in the memory and executable on the processor, the program being loaded and executed by the processor to implement a method for limiting ion diffusion in soil as described in any one of claims 1 to 6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, causes the processor to implement a method for limiting ion diffusion in soil as described in any one of claims 1 to 6.

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