Environmental pollutant distribution monitoring device and component discrimination method

Abstract

The application relates to the technical field of groundwater pollution remediation and monitoring, in particular to an environmental pollutant distribution monitoring device and a component discrimination method. The environmental pollutant distribution monitoring device comprises a sand plate, a complex conductivity tester and a tracing mechanism. The sand plate can accommodate a dyed environmental sample, and the outer wall of the sand plate is provided with a power supply electrode and a measurement electrode. The complex conductivity tester can apply an alternating current field with a variable frequency to the accommodation space to obtain the complex conductivity sigma of the dyed environmental sample at multiple different positions in real time * , thereby obtaining an isopleth complex conductivity distribution map. The tracing mechanism is arranged opposite the sand plate and is used to record and obtain a distribution image of the dyed environmental sample in the accommodation space. Further, the isopleth complex conductivity distribution map and the pollutant color distribution image are integrated, and then a method of geostatistical correlation analysis can be used to discriminate the composition and distribution of the environmental pollutants.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of groundwater pollution remediation and monitoring, in particular to an environmental pollutant distribution monitoring device and component discrimination method. BACKGROUND

[0002] The soil environment has non-homogeneity, and the migration of pollutants in the soil medium is very complex due to the influence of soil types and pollutant compositions. At present, there are still great technical challenges in monitoring and evaluating the distribution and migration of pollutants in groundwater and soil, and laboratory-scale scientific research needs to be carried out.

[0003] At present, the research on environmental pollutants often collects soil and water samples to measure the concentration of environmental pollutants. This method has poor real-time performance and cannot comprehensively monitor the pollution of the environment. Alternatively, a camera is used to study the position of the dyed environmental pollutants, or a complex conductivity tester is used to study the concentration of environmental pollutants at different positions. These methods have good real-time performance, but cannot distinguish environmental pollutants and obtain the composition and distribution information of environmental pollutants. SUMMARY

[0004] Therefore, it is necessary to provide a device that can monitor the environmental pollution in real time and discriminate the composition and distribution of environmental pollutants.

[0005] An environmental pollutant distribution monitoring device for discriminating the proportion of each component pollutant in an environmental sample containing multiple pollutants, the environmental pollutant distribution monitoring device comprising:

[0006] A sandboard having an accommodation space inside, the accommodation space being used to accommodate a dyed environmental sample, the outer wall of the sandboard being provided with a power supply electrode and a measurement electrode; wherein one end of the power supply electrode is located in the accommodation space, and the other end is located outside the sandboard, one end of the measurement electrode is located in the accommodation space, and the other end of the measurement electrode is located outside the sandboard;

[0007] A complex conductivity tester provided with a power supply interface and a measurement interface, the power supply interface being electrically connected with the power supply electrode, an alternating current field with variable frequency is applied to the accommodation space, and the pollutant ions in the environmental sample are driven to move along the direction of the electric field under the action of the alternating current field with variable frequency; the measurement interface is connected with the measurement electrode to obtain the complex conductivities of the dyed environmental sample at multiple different positions in real time , and an isochromatic conductivity distribution map is obtained according to the multiple complex conductivities .

[0008] A tracing mechanism is arranged opposite to the sandboard to record and obtain the distribution image of the dyed environmental sample in the accommodation space.

[0009] According to the distribution image and the contour conductivity distribution map, the proportion of each component pollutant is obtained.

[0010] It can be understood that the power supply electrode and the measurement electrode are arranged in the accommodation space of the sand plate and connected with the complex conductivity tester. The complex conductivity tester can apply a variable frequency alternating current field to the accommodation space to obtain the complex conductivity of the environmental sample , and then the contour complex conductivity distribution map of the environmental sample can be obtained. On the other hand, the tracer mechanism is arranged opposite to the sand plate, so that the tracer mechanism can directly record and obtain the distribution image of the dyed environmental sample in the accommodation space. Therefore, by combining the contour conductivity distribution map and the color distribution image of the pollutant, the proportion of each component environmental pollutant is obtained, that is, the composition and distribution of the environmental pollutant are obtained.

[0011] In one embodiment, the material of the power supply electrode and the measurement electrode is silver, and a silver-chloride silver plating layer is formed on the surface of the power supply electrode and the measurement electrode after being soaked in sodium hypochlorite solution.

[0012] It can be understood that silver has good conductivity, and the silver-chloride silver plating layer is relatively stable. Therefore, such arrangement is conducive to the test.

[0013] In one embodiment, the sand plate includes a box body and a cover plate. The box body has an opening, and the cover plate is sealingly and detachably arranged on the opening to form the accommodation space inside the box body.

[0014] In one embodiment, the number of power supply electrodes is multiple, and the multiple power supply electrodes are uniformly arranged along the outer periphery of the cover plate. One end of the power supply electrode extends into the accommodation space, and the other end penetrates the cover plate to the outside.

[0015] It can be understood that multiple power supply electrodes are arranged along the outer periphery of the cover plate. In this way, different direction electric fields can be applied to the inside of the accommodation space to meet the needs of different direction electric fields.

[0016] In one embodiment, the number of measurement electrodes is multiple, and the multiple measurement electrodes are arranged in an array on the surface of the cover plate and located inside the ring formed by the multiple power supply electrodes. One end of each measurement electrode extends into the accommodation space, and the other end penetrates the cover plate to the outside of the accommodation space to measure the complex conductivity of the environmental sample at multiple different positions .

[0017] It can be understood that multiple measurement electrodes are arranged on the surface of the cover plate in an array, which can comprehensively measure the complex conductivity of the environmental sample. to obtain a clear contour conductivity distribution map.

[0018] In an embodiment, the sand plate is provided with a liquid inlet and a liquid outlet, both of which are in communication with the accommodation space.

[0019] In an embodiment, the sand plate further comprises a rotating mechanism connected to the sand plate for driving the sand plate to rotate and / or tilt relative to the rotating mechanism.

[0020] It can be understood that the rotating mechanism can drive the sand plate to rotate and / or tilt relative to the rotating mechanism, so as to change the stress condition of the environmental sample in the sand plate, so as to study the distribution of the pollutants in the environmental sample under different stress conditions.

[0021] In an embodiment, the rotating mechanism comprises a base and a rotating unit, one end of the rotating unit being connected to the base and the other end being rotatably connected to the sand plate.

[0022] The present application also provides the following technical solutions:

[0023] A method for identifying the composition of environmental pollutants, which is realized based on an environmental pollutant distribution monitoring device, and comprises the following steps:

[0024] Mixing the environmental sample with a staining agent to obtain a stained sample;

[0025] Placing the stained sample in the accommodation space of the sand plate;

[0026] Based on a complex conductivity tester, applying a variable-frequency alternating electric field to the accommodation space to obtain the complex conductivity of the stained sample at multiple different positions ;

[0027] According to the multiple complex conductivities a contour complex conductivity distribution map is obtained;

[0028] Recording and obtaining the pollutant color distribution image of the stained sample through the tracing mechanism;

[0029] According to the contour complex conductivity distribution map and the pollutant color distribution image, the composition and distribution of the environmental pollutants are identified by using geostatistical correlation analysis.

[0030] Compared with the prior art, the environmental pollutant distribution monitoring device is provided with a power supply electrode and a measurement electrode in the accommodation space of the sand plate and is connected to a complex conductivity tester, so that the complex conductivity tester can apply a variable-frequency alternating electric field to the accommodation space to obtain the complex conductivity of the environmental sample , and then the contour complex conductivity distribution of the environmental sample can be obtained, on the other hand, the tracer mechanism is arranged opposite to the sand plate, and the tracer mechanism can directly record and obtain the distribution image of the dyed environmental sample in the accommodating space. Therefore, by synthesizing the contour complex conductivity distribution and the color distribution image of the pollutant, the proportion of each component environmental pollutant can be obtained, that is, the composition and distribution of the environmental pollutant are obtained. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Figure 1 The environmental pollutant distribution monitoring device provided by the present application is shown in the structural schematic diagram.

[0033] Figure 2 The environmental pollutant distribution monitoring device provided by the present application is shown in the structural schematic diagram from another perspective.

[0034] Figure 3 The environmental pollutant distribution monitoring device provided by the present application is shown in the structural schematic diagram when the sand plate is arranged obliquely.

[0035] Figure 4 The environmental pollutant component discrimination method provided by the present application is shown in the flowchart.

[0036] The drawings show: 100, environmental pollutant distribution monitoring device; 101, environmental pollutant component discrimination method; 10, sand plate; 11, accommodating space; 12, power supply electrode; 13, measurement electrode; 14, box body; 141, opening; 15, cover plate; 16, sealing element; 17, liquid inlet; 18, liquid outlet; 19, bolt; 20, complex conductivity tester; 21, power supply interface; 22, measurement interface; 30, tracer mechanism; 40, rotating mechanism; 41, base; 42, rotating unit. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0038] It is to be understood that when an element such as a layer, film or region is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can also be present. In contrast, when an element such as a layer, film or region is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. It will be understood that, when a layer, film or region is referred to as being "on" or "connected to" another element, it has the same meaning as when the layer, film or region is referred to as being "directly on" or "directly connected to" the other element.

[0039] In addition, the terms "first", "second", etc. are used herein only to describe various elements, and do not imply a relative importance or a specific order of the elements. Thus, features defined with "first", "second", etc. can include at least one of the features, explicitly or implicitly.

[0040] In the present application, unless otherwise explicitly specified and limited, "on", "under", "above", and "over" of a first element to a second element can mean that the first element is in direct contact with the second element, or the first element is in indirect contact with the second element through an intermediate medium. Moreover, "on", "above", and "over" of a first element to a second element can mean that the first element is directly above or obliquely above the second element, or only means that the first element is horizontally higher than the second element. "Under", "below", and "underneath" of a first element to a second element can mean that the first element is directly below or obliquely below the second element, or only means that the first element is horizontally lower than the second element.

[0041] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0042] Please refer to Figures 1 to 3 The present application provides an environmental pollutant distribution monitoring device 100, which can monitor and evaluate pollution in real time, realize visualization of migration of non-homogeneous soil pollutants and synchronous testing of complex resistivity imaging, and further determine the proportion of each component pollutant in an environmental sample containing multiple pollutants.

[0043] As Figure 1As shown, the environmental pollutant distribution monitoring device 100 comprises a sand plate 10, a complex conductivity tester 20 and a tracing mechanism 30. The sand plate 10 has an accommodation space 11 inside for accommodating the dyed environmental sample. The outer wall of the sand plate 10 is provided with a power supply electrode 12 and a measurement electrode 13. One end of the power supply electrode 12 is located in the accommodation space 11, and the other end is located outside the sand plate 10. One end of the measurement electrode 13 is located in the accommodation space 11, and the other end is located outside the sand plate 10. The complex conductivity tester 20 is provided with a power supply interface 21 and a measurement interface 22. The power supply interface 21 is electrically connected with the power supply electrode 12 to apply a variable frequency alternating current field to the accommodation space 11, and to drive the pollutant ions in the environmental sample to move along the direction of the electric field under the action of the variable frequency alternating current field. The measurement interface 22 is electrically connected with the measurement electrode 13 to obtain the complex conductivity of the dyed environmental sample at multiple different positions in real time , and to obtain the contour electric conductivity distribution map according to multiple complex conductivities . The tracing mechanism 30 is arranged opposite to the sand plate 10 to record and obtain the distribution image of the dyed environmental sample in the accommodation space 11. According to the distribution image and the contour electric conductivity distribution map, the proportion of each component pollutant is obtained.

[0044] It should be explained that the power supply electrode 12 and the measurement electrode 13 are arranged in the accommodation space 11 of the sand plate 10 and connected with the complex conductivity tester 20. Therefore, the complex conductivity tester 20 can apply a variable frequency alternating current field to the accommodation space 11 to obtain the complex conductivity of the environmental sample , and further obtain the contour electric conductivity distribution map of the environmental sample. On the other hand, the tracing mechanism 30 is arranged opposite to the sand plate 10 to directly record and obtain the distribution image of the dyed environmental sample in the accommodation space 11. Therefore, the proportion of each component environmental pollutant is obtained by comprehensively analyzing the contour electric conductivity distribution map and the pollutant color distribution image, that is, the composition and distribution of the environmental pollutant are obtained.

[0045] Specifically, the contour electric conductivity distribution map and the pollutant color distribution image can be subjected to a statistical correlation analysis by using ArcGIS software. The distribution rule and correlation of the pollutant concentration in the region are analyzed by calculating the local Moran index, and finally the distribution and composition of each pollutant in the region are determined. It should be noted that the local Moran index is more inclined to identify local autocorrelation phenomenon than the global Moran index, and is a fine-grained spatial statistical tool. It should be understood that the above analysis method is known and will not be described here.

[0046] In an embodiment, the material of the power supply electrode 12 and the measuring electrode 13 is all silver, that is, the silver content of the material of the power supply electrode 12 and the measuring electrode 13 is 99.99%, and a silver-chloride silver plating layer (not shown in the figure) is formed on the surface of the power supply electrode 12 and the measuring electrode 13 after being soaked in sodium hypochlorite solution. It should be explained that silver has good electrical conductivity, and the silver-chloride silver plating layer is relatively stable, which can prevent the electrode from being polarized, and the electrode polarization will interfere with the experimental signal. Therefore, the above setting is conducive to the test.

[0047] As shown in Figure 1 and Figure 2 , the sanding plate 10 includes a box body 14 and a cover plate 15. The box body 14 has an opening 141, and the cover plate 15 is sealingly and detachably covered on the opening 141 to form a containing space 11 inside the box body 14. Specifically, the shape of the containing space 11 in the embodiment is rectangular, and in other embodiments, the shape of the containing space 11 can also be cylindrical, triangular, etc.

[0048] In an embodiment, the sanding plate 10 further includes a sealing member 16, which is circumferentially arranged around the opening 141 and located between the box body 14 and the cover plate 15. The gap between the box body 14 and the cover plate 15 is sealed by the sealing member 16, thereby preventing the liquid in the containing space 11 from leaking out through the gap between the box body 14 and the cover plate 15. Here, the sealing member 16 can be a sealing ring or a sealing gasket or other components with sealing function.

[0049] Specifically, a plurality of threaded holes (not labeled in the figure) are uniformly arranged on one side of the box body 14 facing the cover plate 15, and corresponding threaded holes (not labeled in the figure) are arranged on the cover plate 15. The threaded holes are sequentially threaded through the threaded holes on the box body 14 and the cover plate 15 to fix the box body 14 and the cover plate 15 together. The number of threaded holes can be 20, 24 or 28. Of course, the specific number of threaded holes can be selected and adjusted according to actual conditions.

[0050] As shown in Figure 1 , the number of power supply electrodes 12 is multiple, and the multiple power supply electrodes 12 are uniformly arranged along the outer periphery of the cover plate 15. One end of the power supply electrode 12 extends into the containing space 11, and the other end extends to the outside through the cover plate 15. Specifically, the number of power supply electrodes 12 can be 20, 24 or 28. It should be explained that the multiple power supply electrodes 12 do not need to be all connected, and the corresponding power supply electrodes 12 can be connected according to the needs of the electric field of the specific experiment.

[0051] As shown in Figure 1As shown, the number of measuring electrodes 13 is multiple, and the multiple measuring electrodes 13 are arranged on the surface of the cover plate 15 in an array manner and are located inside the annular formed by the multiple power supply electrodes 12, one end of each measuring electrode 13 extends into the containing space 11, and the other end extends out of the containing space 11 through the cover plate 15, so as to measure the complex conductivity of the environmental sample at multiple different positions . Specifically, the number of measuring electrodes 13 can be 20, 40 or 60. It needs to be explained that the multiple measuring electrodes 13 can comprehensively measure the complex conductivity of the environmental sample to obtain a clear contour complex conductivity distribution map.

[0052] In an embodiment, the sand plate 10 is provided with a liquid inlet 17 and a liquid outlet 18, both of which are in communication with the containing space 11. In this way, the pollutant solution can be introduced into the containing space 11 through the liquid inlet 17 for subsequent pollutant composition distribution testing, and the pollutant solution can be discharged outwards through the liquid outlet 18 after the testing is completed.

[0053] In an embodiment, the tracing mechanism 30 can be a camera to take pictures of the migration process of the environmental sample in the sand plate 10. Specifically, the camera model is not required, as long as it can clearly and accurately reflect the migration process of the environmental sample. Here, the tracing mechanism 30 can also be a camera, a scanner or other devices with a photographing function.

[0054] As shown in the figure, Figure 2 The sand plate 10 further comprises a rotating mechanism 40 connected to the sand plate 10 to drive the sand plate 10 to rotate and / or tilt relative to the rotating mechanism 40. It needs to be explained that tilting the sand plate 10 can change the stress condition of the environmental sample in the sand plate 10 to study the distribution of pollutants in the environmental sample under different stress conditions. Specifically, the inclination angle of the sand plate 10 can be 30 degrees, 45 degrees or 60 degrees. Figure 3 The environmental pollutant distribution monitoring device 100 when the inclination angle of the sand plate 10 is 45 degrees.

[0055] In this embodiment, the rotating mechanism 40 comprises a base 41 and a rotating unit 42, one end of the rotating unit 42 is connected to the base 41, and the other end is rotatably connected to the sand plate 10. Specifically, the base 41 is provided in a triangular structure. Of course, the base 41 can also be provided in a rectangular structure and the like, as long as the base 41 can be stable and immovable. The rotating unit 42 is provided with a rotating shaft or a universal joint and the like to realize rotation relative to the base 41.

[0056] As shown in the figure, Figure 4As shown, the present application also provides an environmental pollutant component discrimination method 101, which is realized based on the environmental pollutant distribution monitoring device 100. Specifically, the environmental pollutant component discrimination method 101 comprises the following steps:

[0057] Step S1, mixing the environmental sample and the dyeing agent to obtain a dyed sample;

[0058] Step S2, placing the dyed sample in the accommodation space of the sand plate;

[0059] Step S3, based on the complex conductivity tester, applying an alternating current field with a variable frequency to the accommodation space to obtain the complex conductivities of the dyed sample at multiple different positions ;

[0060] Step S4, obtaining the contour complex conductivity distribution map according to the multiple complex conductivities ;

[0061] Step S5, recording and obtaining the pollutant color distribution image of the dyed sample by the tracing mechanism;

[0062] Step S6, according to the contour complex conductivity distribution map and the pollutant color distribution image, using geostatistical correlation analysis to discriminate the composition and distribution of the environmental pollutant.

[0063] In step S1, the dyeing agent can be carmine, rhodamine or methylene blue, and its concentration is adjusted according to the experimental requirements. For example, in the present embodiment, carmine with a concentration of 15% can be selected.

[0064] In step S3, the obtaining step of each complex conductivity is as follows:

[0065] Step S31, based on the complex conductivity tester, obtaining the frequency domain phase angle and the amplitude of the environmental sample;

[0066] Step S32, calculating the complex conductivity using the formula ;

[0067] In step S4, the values of the multiple complex conductivities are recorded, and the points with the same complex conductivity are connected to draw the contour complex conductivity distribution map.

[0068] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not contradict, they shall be considered as the scope of the present disclosure.

[0069] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An environmental pollutant distribution monitoring device for determining the proportion of each component pollutant in an environmental sample containing a plurality of pollutants, characterized by comprising: The environmental pollutant distribution monitoring device comprises: A sand plate (10) has an accommodating space (11) inside for accommodating a dyed environmental sample, and an outer wall of the sand plate (10) is provided with a power supply electrode (12) and a measurement electrode (13); one end of the power supply electrode (12) is located in the accommodating space (11), and the other end is located outside the sand plate (10); one end of the measurement electrode (13) is located in the accommodating space (11), and the other end is located outside the sand plate (10); The complex conductivity tester (20) is provided with a power supply interface (21) and a measurement interface (22), the power supply interface (21) is connected with the power supply electrode (12), an alternating current field with variable frequency is applied to the accommodation space (11), under the action of the alternating current field with variable frequency, the pollutant ions in the environmental sample move along the direction of the electric field; the measurement interface (22) is electrically connected with the measurement electrode (13), so as to obtain the complex conductivity of the dyed environmental sample at a plurality of different positions in real time According to a plurality of complex conductivities The contour complex conductivity distribution map is obtained. A tracing mechanism (30) is arranged opposite to the sand plate (10) to record and obtain a distribution image of the dyed environmental sample in the accommodating space (11); According to the distribution image and the contour conductivity distribution map, a spatial autocorrelation of the pollutant concentration in the region is analyzed by using a geostatistical correlation analysis method to obtain the composition and distribution of each component environmental pollutant.

2. The environmental pollutant distribution monitoring apparatus according to claim 1, wherein The power supply electrode (12) and the measurement electrode (13) are both made of silver, and a silver-chloride silver plating layer is formed on surfaces of the power supply electrode (12) and the measurement electrode (13) after being soaked in sodium hypochlorite solution.

3. The environmental pollutant distribution monitoring apparatus of claim 1, wherein The sand plate (10) comprises a box body (14) and a cover plate (15), the box body (14) has an opening (141), and the cover plate (15) is sealingly and detachably arranged on the opening (141) to form the accommodating space (11) in the box body (14).

4. The environmental pollutant distribution monitoring apparatus of claim 3, wherein The sand plate (10) further comprises a sealing member (16) which is arranged around the opening (141) and between the box body (14) and the cover plate (15) to seal the gap between the box body (14) and the cover plate (15).

5. The environmental pollutant distribution monitoring apparatus of claim 3, wherein The power supply electrode (12) is provided in a plurality of numbers, and the plurality of power supply electrodes (12) are uniformly arranged along an outer periphery of the cover plate (15), one end of the power supply electrode (12) extends into the accommodating space (11), and the other end penetrates through the cover plate (15) to the outside.

6. The environmental pollutant distribution monitoring apparatus of claim 5, wherein The measuring electrodes (13) are multiple in number and are arranged on the surface of the cover plate (15) in an array inside the ring formed by the power supply electrodes (12), one end of each of the measuring electrodes (13) extending into the accommodation space (11) and the other end extending out of the accommodation space (11) through the cover plate (15) to measure the complex permittivity of the environmental sample at multiple different positions .

7. The environmental pollutant distribution monitoring apparatus of claim 3, wherein The sand plate (10) is provided with a liquid inlet (17) and a liquid outlet (18), and the liquid inlet (17) and the liquid outlet (18) are both in communication with the accommodating space (11).

8. The environmental pollutant distribution monitoring apparatus of claim 1, wherein The sand plate (10) further comprises a rotating mechanism (40) connected to the sand plate (10) to drive the sand plate (10) to rotate and / or tilt relative to the rotating mechanism (40).

9. The environmental pollutant distribution monitoring apparatus of claim 8, wherein The rotating mechanism (40) comprises a base (41) and a rotating unit (42), one end of the rotating unit (42) is connected to the base (41), and the other end is rotationally connected to the sand plate (10).

10. A method for discriminating environmental pollutant components, realized based on the environmental pollutant distribution monitoring device according to any one of claims 1-9; characterized in that, The environmental pollutant component identification method comprises the following steps: Mixing the environmental sample and the dyeing agent to obtain a dyed sample; Placing the dyed sample in the accommodating space of the sand plate; Based on the complex conductivity tester, an alternating current field with varying frequency is applied to the containing space to obtain the complex conductivity of the dyeing sample at multiple different positions ; According to the multiple complex conductivities Obtaining a contour complex conductivity profile; Recording and obtaining the pollutant color distribution image of the dyed sample by the tracing mechanism; According to the contour map of the specific conductivity and the color distribution of the pollutants, the composition and distribution of the environmental pollutants are determined by using the correlation analysis of geostatistics.

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