Barrier zone simulation experiment device for intercepting heavy metal migration in soil
By designing a barrier zone simulation experimental device with multi-layer filling materials and segmented sampling devices, the problem of not being able to accurately determine the functional capacity of the barrier zone in existing technologies has been solved, and efficient analysis and accuracy have been achieved in the study of heavy metal migration and barrier.
Patent Information
- Application Number
- CN202422591421.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-10-25
AI Technical Summary
Existing experimental setups for heavy metal migration and blocking studies are simple in structure and usually use only a single material for filling. They cannot accurately determine the blocking capacity of each functional zone of the barrier band, resulting in an inability to fully analyze the migration and blocking mechanisms of heavy metals in the environment.
A barrier zone simulation experimental device for intercepting the migration of heavy metals in soil was designed, comprising a column device, a top cover device, an internal filling material layer, and a segmented sampling device. The internal filling material layer includes a buffer layer, a support material layer, and a core interception layer. The heavy metal interception capability of each treatment segment is sampled and analyzed by the segmented sampling device.
By combining various materials and using segmented sampling, the efficiency of heavy metal blocking research has been improved. It enables detailed analysis of the heavy metal interception capabilities of each treatment segment, thereby enhancing the accuracy and efficiency of the blocking effect.
Smart Images
Figure CN223597465U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of heavy metal migration in soil barrier, especially a simulation experiment device for blocking heavy metal migration in soil. BACKGROUND
[0002] Antimony is a global pollutant and one of the most toxic metal elements of international concern. Among them, antimony mine area has the pollution characteristics of antimony-arsenic composite pollution, water-soil interaction, spatial difference, etc. The commonly used treatment methods such as microbial method, chemical leaching, cement solidification / stabilization have the problems of simultaneous stabilization difficulty, low blocking and controlling efficiency, large capacity ratio, high cost, etc. At present, by mixing chemicals or adsorption materials, the pollutants can be stabilized and fixed or adsorbed through chemical reaction, which can prevent their transmission and diffusion. Especially in the mine area with wide pollution range, complex pollution scene and limited site construction, it has the advantages of easy operation, low treatment cost and avoiding secondary pollution. Therefore, the research on the migration and barrier law of heavy metals in soil and its mechanism can provide scientific basis for formulating effective environmental protection measures and pollution prevention and control in antimony mine area.
[0003] The existing experimental device for heavy metal migration and barrier research generally has a simple structure, and generally only uses a single material for filling and blocking. The blocking capacity of each functional area of the barrier belt cannot be accurately judged, so that the migration and barrier mechanism of heavy metals in the environment cannot be comprehensively analyzed. UTILITY MODEL CONTENT
[0004] The main purpose of the utility model is to provide a barrier belt simulation experiment device for intercepting heavy metal migration in soil, which aims to solve the problems in the prior art that the heavy metal migration and barrier related experiments in soil only use single material for filling and blocking, and the blocking capacity of each functional area of the barrier belt cannot be accurately judged.
[0005] To achieve the above purpose, the utility model provides a barrier belt simulation experiment device for intercepting heavy metal migration in soil, which comprises:
[0006] The column device has a containing cavity extending along the axial direction of itself inside.
[0007] The top cover device is detachably connected with both ends of the column device, so that the containing cavity of the column device forms a closed cavity. The top cover device has a through hole in communication with the closed cavity.
[0008] The internal filling material layer comprises a buffer layer, a support material layer and a core interception layer filled in the containing cavity along the axial direction.
[0009] Segmented sampling devices are arranged outside the column device and are in communication with the areas corresponding to the buffer layer, the support material layer and the core interception layer in the accommodating cavity respectively.
[0010] According to the embodiments of the present application, the segmented sampling devices include multiple groups of conduits.
[0011] The multiple groups of conduits are arranged in a straight line and distributed on the column device in the axial direction. The areas corresponding to the buffer layer, the support material layer and the core interception layer each have at least one group of conduits.
[0012] According to the embodiments of the present application, each group of conduits has a corresponding control switch.
[0013] According to the embodiments of the present application, the column device has an observation window extending in the axial direction and capable of observing the internal filling material layer.
[0014] According to the embodiments of the present application, the observation window is provided with scale lines for calculating the filling length of the internal filling material layer.
[0015] According to the embodiments of the present application, the column device includes multiple column segments connected in the axial direction, and each column segment is provided with a corresponding segmented sampling device.
[0016] According to the embodiments of the present application, the column device further includes a communication pipe in communication with the hole of the top cover device.
[0017] According to the embodiments of the present application, the buffer layer includes a first buffer layer and a second buffer layer, and the first buffer layer and the second buffer layer are located at two ends of the accommodating cavity respectively.
[0018] The support material layer includes a first support material layer and a second support material layer, the first support material layer is located on the side of the first buffer layer away from the corresponding top cover device, and the second support material layer is located on the side of the second buffer layer away from the corresponding top cover device.
[0019] The core interception layer is located between the first support material layer and the second support material layer.
[0020] According to the embodiments of the present application, the first buffer layer and the second buffer layer are both quartz sand layers.
[0021] According to the embodiments of the present application, the first support material layer and the second support material layer are both zeolite layers, attapulgite layers or quartz sand layers.
[0022] The present application has the following beneficial effects:
[0023] The barrier band simulation experiment device for intercepting heavy metal migration in soil has the internal filling material layer including a buffer layer, a support material layer and a core interception layer, multiple treatment sections are formed inside, each treatment section has a corresponding segmented sampling device, sampling is carried out through the segmented sampling device, the barrier liquid of different treatment sections can be collected, and the heavy metal interception capacity of each treatment section in the barrier device is analyzed, and the working efficiency of heavy metal efficient barrier research is further improved. BRIEF DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the technical scheme 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 as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.
[0025] Figure 1 It is a stereoscopic structure schematic view of the barrier band simulation experiment device for intercepting heavy metal migration in soil according to an optional embodiment of the present application.
[0026] Figure 2 It is a comparison graph of influences of different support materials on arsenic and antimony isolation capacity in the barrier band simulation experiment device for intercepting heavy metal migration in soil according to an optional embodiment of the present application.
[0027] The implementation, functional features and advantages of the present application will be further described with reference to the drawings in combination with the embodiments.
[0028] 1, water inlet pipe; 2, internal filling material layer; 3, column device; 4, top cover device; 5, hole; 6, buffer layer; 7, support material layer; 8, core interception layer; 9, segmented sampling device; 10, conduit. DETAILED DESCRIPTION
[0029] In order to more clearly illustrate the purpose, technical scheme and advantages of the present application, the present embodiment will be further described in detail in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0030] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.
[0031] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features.
[0032] Furthermore, the technical solutions of various embodiments of the present application can be combined with each other, but must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the scope of protection required by the present application.
[0033] Referring to Figure 1 The present application provides a kind of for intercepting heavy metal migration in soil barrier band simulation experiment device, the barrier band simulation experiment device for intercepting heavy metal migration in soil described in the application includes column device 3, top cap device 4, internal filling material layer 2 and segmented sampling device 9.Column device 3 has the accommodating cavity extending along its own axial direction inside.Column device 3 is detachably connected with the two ends of top cap device 4, so that the accommodating cavity of the column device 3 forms a closed cavity.The top cap device 4 has a through hole 5, which communicates with the closed cavity.Internal filling material layer 2 includes buffer layer 6, support material layer 7 and core interception layer 8, which are filled in the accommodating cavity along the axial direction.Segmented sampling device 9 is arranged outside the column device 3 and communicates with the corresponding regions of the buffer layer 6, the support material layer 7 and the core interception layer 8 in the accommodating cavity.
[0034] The top cap device 4 can be detachably connected to the two ends of the column device 3 by bolts.The top cap device 4 is provided with a hole 5, which can be connected to water inlet and outlet pipes for injecting or collecting liquid.In some embodiments, a communication pipe is further provided, which communicates with the hole 5 of the top cap device 4.Exemplarily, one side of the communication pipe is a water inlet pipe 1, which is connected to a peristaltic pump to control the flow rate of water and different solutions to control the concentration of water, and the other side of the communication pipe is a water outlet pipe 11 for collecting water.
[0035] The column device 3 can be connected to the top cap device 4 at both ends to form a closed structure, and the inside is used for filling materials to block heavy metals.The internal filling material can be optimized by using various materials to fill the column device 3.The internal filling material includes buffer layer 6, support material layer 7 and core interception layer 8, and the materials of each layer can be selected as needed.
[0036] The segmented sampling device 9 is arranged outside the column device 3 and penetrates the column. The segmented sampling device 9 is in communication with the column region corresponding to each layer of the buffer layer 6, the support material layer 7 and the core interception layer 8, so that water samples can be taken for analysis for each layer of material, so as to study the heavy metal interception capacity of each layer of material, that is, each treatment section of the buffer layer 6, the support material layer 7 and the core interception layer 8.
[0037] In some embodiments, the buffer layer 6 includes a first buffer layer and a second buffer layer, and the first buffer layer and the second buffer layer are respectively located at two ends of the containing cavity. The support material layer 7 includes a first support material layer and a second support material layer, and the first support material layer is located away from the top cover device 4 on the side of the first buffer layer, and the second support material layer is located away from the top cover device 4 on the side of the second buffer layer. The core interception layer 8 is located between the first support material layer and the second support material layer.
[0038] The buffer layer 6 is filled at both ends of the column device 3 and adjacent to the top cover device 4. The buffer layer 6 is located at the front end of the blocking device and can effectively disperse the water flow entering the experimental device uniformly. The uniform dispersion of the water flow can not only reduce the physical impact of the water flow impact on the experimental device, but also avoid the breakdown phenomenon caused by the continuous work of the subsequent filling material. The buffer layer 6 at the tail end can intercept the parts that may fall off from the front end structure during the treatment process, and can help stabilize the blocking effect.
[0039] The support material layer is filled inside the column device 3 close to the two end buffer layers 6. The front end support material layer is the second layer structure contacted by the solution after entering the blocking device. The support material layer can assist in intercepting heavy metals for the first time, reducing the processing pressure and concentration impact on the subsequent stage. The rear end support material layer can perform secondary interception on the heavy metals that are not intercepted by the core interception layer 8.
[0040] Preferably, the support material layer 7 is partially selected from zeolite, attapulgite and quartz sand. In order to ensure obvious results and facilitate observation and analysis, experiments are carried out under high flow rate and high water concentration conditions. Therefore, the experimental conditions are as follows: flow rate 3 m / d, heavy metal concentration 10 mg / L, core interception layer 8 filling length 2 cm, support material layer 7 filling length 6 cm, support material selection: quartz sand, attapulgite, zeolite, buffer layer thickness 10 cm, and buffer layer 6 filled with quartz sand. The data show that the zeolite has a better heavy metal interception efficiency than attapulgite and quartz sand. Figure 2 Therefore, zeolite is preferably used as the support material.
[0041] The core interception layer 8 is filled inside the support material layer 7. The structure has high heavy metal interception capacity, and the left and right sides of the core interception layer 8 are the support material layer 7.
[0042] In some embodiments, the first buffer layer and the second buffer layer are both quartz sand layers.
[0043] In some embodiments, the first support material layer and the second support material layer are both zeolite layers.
[0044] The simulation experiment device for intercepting heavy metal migration in soil in the utility model is used for the research work of heavy metal interception, the internal filling material with good interception effect is obtained by adjusting the types of internal filling materials, the optimal combination of internal filling materials is obtained by optimizing the combination of various materials, the optimal filling length of each structure of the internal filling material is selected by orthogonal experiment, so that the simulation experiment device for intercepting heavy metal migration in soil obtains the optimal interception effect.
[0045] Preferably, the filling length of the core interception layer 8, the filling length of the support material layer 7, and the filling particle size of the support material layer are the three main influencing factors, and the arsenic and antimony standard barrier capacity is used as the observation index to perform orthogonal experiment (Table 1), and the result analysis is shown in Tables 2 and 3.
[0046] Table 1 orthogonal experiment table
[0047]
[0048] Table 2 orthogonal experiment results and analysis-As
[0049]
[0050] Table 3 orthogonal experiment results and analysis-Sb
[0051]
[0052] From the range analysis of the arsenic element experiment in Table 2, R1>R2>R3, among the three influencing factors, the filling length of the core interception layer 8 has the greatest influence on the arsenic standard barrier capacity, the filling length of the support material layer 7 is second, and the filling particle size of the support material layer has less influence. Therefore, the optimal barrier scheme for arsenic elements is A3B3C3, that is, the filling length of the core interception layer 8 is 6 cm, the filling length of the support material layer 7 is 8 cm, and the filling particle size of the support material layer is 40-80 mesh. From Table 3, the optimal barrier scheme for antimony elements is A3B2C3, that is, the filling length of the core interception layer 8 is 6 cm, the filling length of the support material layer 7 is 6 cm, and the filling particle size of the support material layer is 40-80 mesh.
[0053] In order to ensure the optimal treatment effect, the later experiment will adopt the scheme A3B3C3, that is, the optimal parameters of the internal filling material are obtained: the filling length of the core interception layer 8 is 6 cm, the filling length of the support material layer 7 is 8 cm, and the filling particle size of the support material layer is 40-80 meshes.
[0054] The barrier band simulation experiment device for intercepting heavy metal migration in soil in the utility model, the internal filling material layer 2 includes the buffer layer 6, the support material layer 7 and the core interception layer 8, so that a plurality of treatment sections are formed inside, each functional area has a corresponding segmented sampling device 9, sampling is carried out through the segmented sampling device 9, the barrier liquid of different treatment sections can be collected, and the heavy metal interception capacity of each treatment section in the barrier device is analyzed, and the working efficiency of heavy metal efficient barrier research is further improved.
[0055] In some embodiments, the segmented sampling device 9 includes a plurality of groups of conduits 10. The plurality of groups of conduits 10 are arranged in a straight line and distributed on the column device 3 in the axial direction. The buffer layer 6, the support material layer 7 and the core interception layer 8 correspond to at least one group of conduits 10 in the respective regions.
[0056] In this embodiment, the buffer layer 6, the support material layer 7 and the core interception layer 8 each have at least one corresponding group of conduits 10 in each treatment section. The corresponding conduits 10 can be used to take out the corresponding water samples for research. The device can more specifically simulate the heavy metal migration and interception behavior in the barrier process. The segmented sampling device 9 can collect the barrier liquid of different treatment sections, so as to analyze the heavy metal interception capacity of each treatment section in the barrier device, and the working efficiency of heavy metal efficient barrier research is further improved.
[0057] Moreover, when each treatment section has two or more groups of conduits 10, the heavy metal interception capacity of the filling length of each treatment section can be researched by sampling and researching through different conduits 10.
[0058] In some embodiments, each group of conduits 10 has a corresponding control switch. The control switch can control the opening and closing of the conduit 10, and the conduit 10 is only opened during sampling research. Exemplarily, the control switch is a pipe valve, which is arranged at a position close to the column device 3 of the conduit 10. In this way, the volume of water sample entering the conduit 10 is small when sampling is not carried out.
[0059] In some embodiments, the column device 3 has an observation window extending in the axial direction, which can observe the internal filling material layer 2.
[0060] The observation window is made of transparent material, such as glass, resin and the like. The observation window is embedded in the column device 3 and arranged along the axial direction, has a long extension length, and has a large observation area, so that the filling condition (e.g., whether the filling is flat and compact) of the internal filling material layer 2 and the flow condition of water sample during operation can be observed.
[0061] In some embodiments, the observation window is provided with a scale line for calculating the filling length of the internal filling material layer 2.
[0062] The internal filling material layer 2 is usually filled by vertically placing the column device 3. In this case, the conventional barrier tape simulation experiment device is not easy to control the height of the internal filling material layer. In the present embodiment, the filling length can be accurately controlled by the observation window and the scale line. The scale line can be provided on the observation window by printing or etching and the like.
[0063] In some embodiments, the column device 3 comprises a plurality of column segments connected in series along the axial direction, and each column segment is provided with a corresponding segment sampling device 9.
[0064] The column segments can be detachably connected by threads, buckles and the like. For example, the number of column segments is 2-4. This kind of arrangement is helpful for filling the internal material layer. When filling the first layer of the internal material layer, according to the filling length of this part, one column segment or two column segments combined are selected to fill the material, so that the material in this part can be filled and the uniform filling of this part can be controlled.
[0065] In summary, the above technical scheme of the present application is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation or direct / indirect application in other related technical fields based on the technical concept of the present application and the content of the present application are included in the patent protection scope of the present application.
Claims
1. A barrier zone simulation experimental device for intercepting the migration of heavy metals in soil, characterized in that, The barrier zone simulation experimental device for intercepting the migration of heavy metals in soil includes: A cylindrical device with an internal receiving cavity extending along its own axial direction; The top cover device is detachably connected to both ends of the column device, so that the receiving cavity of the column device forms a closed cavity; the top cover device has a through hole that communicates with the closed cavity; The internal filling material layer includes a buffer layer, a support material layer, and a core interception layer that are filled in the cavity and distributed axially. The segmented sampling device is located outside the columnar device and is connected to the regions corresponding to the buffer layer, the support material layer, and the core interception layer within the receiving cavity.
2. The barrier zone simulation experimental device for intercepting the migration of heavy metals in soil according to claim 1, characterized in that, The segmented sampling device includes multiple sets of catheters; The multiple sets of conduits are arranged in a straight line and distributed axially on the column device; the regions corresponding to the buffer layer, the support material layer, and the core interception layer each have at least one set of conduits.
3. The barrier zone simulation experimental device for intercepting the migration of heavy metals in soil according to claim 2, characterized in that, Each set of catheters has a corresponding control switch.
4. The barrier zone simulation experimental device for intercepting the migration of heavy metals in soil according to claim 1, characterized in that, The columnar device has an axially extending observation window that allows observation of the internal filling material layer.
5. The barrier zone simulation experimental device for intercepting the migration of heavy metals in soil according to claim 4, characterized in that, The observation window is provided with scale lines for calculating the filling length of the internal filling material layer.
6. The barrier zone simulation experimental device for intercepting the migration of heavy metals in soil according to claim 1, characterized in that, The column device includes multiple column segments connected end to end along the axial direction, and each column segment is equipped with a corresponding segment sampling device.
7. The barrier zone simulation experimental device for intercepting the migration of heavy metals in soil according to claim 1, characterized in that, It also includes a connecting pipe that communicates with the opening of the top cover device.
8. The barrier zone simulation experimental apparatus for intercepting the migration of heavy metals in soil according to any one of claims 1 to 7, characterized in that, The buffer layer includes a first buffer layer and a second buffer layer, which are located at opposite ends of the receiving cavity. The support material layer includes a first support material layer and a second support material layer. The first support material layer is located on the side of the first buffer layer away from the corresponding top cover device, and the second support material layer is located on the side of the second buffer layer away from the corresponding top cover device. The core interception layer is located between the first support material layer and the second support material layer.
9. The barrier zone simulation experimental device for intercepting the migration of heavy metals in soil according to claim 8, characterized in that, Both the first buffer layer and the second buffer layer are quartz sand layers.
10. The barrier zone simulation experimental device for intercepting the migration of heavy metals in soil according to claim 8, characterized in that, Both the first support material layer and the second support material layer are zeolite layers, attapulgite layers, or quartz sand layers.