CN112051383B - Simulation experiment device for migration and transformation of pollutants in underground water level fluctuation zone - Google Patents
Simulation experiment device for migration and transformation of pollutants in underground water level fluctuation zone Download PDFInfo
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- CN112051383B CN112051383B CN202010877991.7A CN202010877991A CN112051383B CN 112051383 B CN112051383 B CN 112051383B CN 202010877991 A CN202010877991 A CN 202010877991A CN 112051383 B CN112051383 B CN 112051383B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 41
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 41
- 230000005012 migration Effects 0.000 title claims abstract description 26
- 238000013508 migration Methods 0.000 title claims abstract description 26
- 238000004088 simulation Methods 0.000 title claims abstract description 20
- 230000009466 transformation Effects 0.000 title claims description 12
- 239000002689 soil Substances 0.000 claims abstract description 90
- 238000012544 monitoring process Methods 0.000 claims abstract description 63
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 239000003673 groundwater Substances 0.000 claims description 21
- 238000002386 leaching Methods 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 13
- 238000001764 infiltration Methods 0.000 claims description 12
- 230000008595 infiltration Effects 0.000 claims description 12
- 238000002474 experimental method Methods 0.000 claims description 10
- 239000006004 Quartz sand Substances 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 238000013480 data collection Methods 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 230000035699 permeability Effects 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 2
- 238000005429 filling process Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 13
- 230000008859 change Effects 0.000 description 12
- 238000005273 aeration Methods 0.000 description 11
- 229920006395 saturated elastomer Polymers 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000000284 extract Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G01N33/246—Earth materials for water content
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
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Abstract
The invention provides an underground water level fluctuation belt pollutant migration and conversion simulation experiment device, which relates to the technical field of underground water level monitoring and aims to solve the technical problem that a wear-resistant structure in the prior art needs to be frequently replaced, and comprises a container, a first pipeline and a second pipeline, wherein: filling a soil sample in the container; the outer surface of the container is connected with a water pressure monitoring part, a water content monitoring part, an ORP monitoring part, a soil moisture monitoring part and a soil sample collecting part; a first porous plate is arranged in the container, a water storage cavity is arranged at the bottom of the first porous plate and the container, and a discharge port is formed at the bottom of the container; the first pipeline and the second pipeline are respectively connected with the top and the bottom of the container, and the first peristaltic pump and the second peristaltic pump are respectively arranged on the first pipeline and the second pipeline.
Description
Technical Field
The invention relates to the technical field of underground water level monitoring, in particular to an underground water level fluctuation belt pollutant migration and conversion simulation experiment device.
Background
The simulation research of the soil and underground water coupling experiment is an important research foundation in the related research of soil and underground water.
The groundwater level fluctuation zone is the interface between soil and a saturated groundwater aquifer and is also the main position of material exchange.
The applicant has found that the prior art has at least the following technical problems:
the existing experimental simulation device for migration and transformation of pollutants in the groundwater level fluctuation zone focuses on geochemical environment change of a saturated groundwater aquifer in the water level fluctuation process, changes of unsaturated environment of an aeration zone are ignored, and in addition, the existing experimental device for migration of pollutants cannot realize groundwater level fluctuation scene simulation caused by top precipitation.
Disclosure of Invention
The invention aims to provide an experimental device for simulating the migration and transformation of pollutants in a groundwater level fluctuation zone, and aims to solve the technical problems that the existing experimental device for simulating the migration and transformation of pollutants in a groundwater level fluctuation zone in the prior art mostly focuses on the geochemical environment change of a saturated groundwater aquifer in a water level fluctuation process, ignores the unsaturated environment change of an aeration zone, and cannot realize the simulation of a groundwater level fluctuation situation caused by top precipitation in the existing experimental device for migrating pollutants. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to realize the purpose, the invention provides the following technical scheme:
the invention provides an underground water level fluctuation belt pollutant migration and conversion simulation experiment device, which comprises a container, a first pipeline and a second pipeline, wherein:
filling a soil sample in the container;
the outer surface of the container is connected with a water pressure monitoring part, a water content monitoring part, an ORP monitoring part, a soil moisture monitoring part and a soil sample collecting part;
a first porous plate is arranged inside the container, a water storage cavity is arranged at the bottom of the first porous plate and the container, and a discharge port is formed at the bottom of the container;
the first pipeline and the second pipeline are respectively connected with the top and the bottom of the container, and a first peristaltic pump and a second peristaltic pump are respectively arranged on the first pipeline and the second pipeline.
Preferably, the device further comprises a rainfall leaching device, the rainfall leaching device is arranged at the top of the container, wherein:
the rainfall eluviation device includes the casing, set up in apron and the second perforated plate at casing top, wherein:
a cavity is arranged in the shell, and the second porous plate is arranged at the bottom of the cavity and is positioned between the rainfall leaching device and the container;
the cover plate is provided with a solution inlet.
Preferably, the water content monitoring part, the ORP monitoring part, the soil moisture monitoring part and the soil sample collecting part are uniformly arranged along the circumferential direction of the outer surface of the container.
Preferably, the moisture content monitoring part is configured to include a plurality of moisture content sensors, and the plurality of moisture content sensors are uniformly distributed along the height direction of the container;
the ORP monitoring part is provided to comprise a plurality of ORP sensors which are uniformly distributed along the height direction of the container;
the soil moisture monitoring part comprises a plurality of soil moisture collectors which are uniformly distributed along the height direction of the container;
the soil sample collection portion includes a plurality of soil sample collection holes, and is a plurality of soil sample collection holes are followed the direction of height evenly distributed of container.
Preferably, the water pressure monitoring portion is arranged to include a water pressure sensor, the water pressure sensor is arranged at the bottom of the soil sample collecting hole, and the water pressure sensor and the soil sample collecting holes are equidistantly distributed on the soil sample collecting portion.
Preferably, the system further comprises a data collector and an analysis platform, wherein:
the data collector is connected with the water content sensor, the water pressure sensor, the ORP sensor and the soil moisture collector;
the analysis platform comprises a signal receiving device, the data acquisition unit comprises a signal transmitting device, and the data acquisition unit is in wireless connection with the analysis platform.
Preferably, the container is of a cylindrical structure, and a plurality of support legs are uniformly arranged at the bottom of the container along the circumferential direction of the container.
Preferably, quartz sand layers are arranged at the top and the bottom of the soil sample.
Preferably, the cover plate is a transparent cover plate, and a sealing structure is arranged between the cover plate and the shell.
Preferably, the aperture of each of the first perforated plate and the second perforated plate is set to 0.1-0.5 cm.
The invention provides an experiment device for simulating migration and conversion of pollutants in a groundwater level fluctuation zone, which is characterized in that a water pressure monitoring part, a water content monitoring part and an ORP monitoring part are adopted to monitor changes of a seepage field and a chemical field in real time in the whole simulation process, a soil moisture monitoring part is used for extracting a water sample of an aeration zone, a soil sample collecting part is used for extracting soil, pollutant concentration distribution, pollutant migration and conversion conditions, seepage field change conditions and chemical environment change conditions in the pollutant infiltration process are monitored, changes of physical and chemical environments of the aeration zone and a saturated zone are synchronously researched, a uniform rainfall infiltration leaching device is used in a matching mode, the device is used for simulating real rainfall scenes, and aeration zone water migration monitoring and saturated zone water level monitoring under different rainfall scenes can be completed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a simulation experiment device for migration and conversion of pollutants in a groundwater level fluctuation zone according to the present invention;
FIG. 2 is a schematic view of the structure of the rainfall leaching device;
FIG. 3 is a schematic top view of the container of the present invention;
FIG. 4 is a schematic view of the structure of the water content detecting section according to the present invention;
FIG. 5 is a schematic diagram of the structure of an ORP monitoring section of the present invention;
FIG. 6 is a schematic view showing the structure of a soil moisture monitoring section according to the present invention;
FIG. 7 is a schematic view showing the structure of a soil sample collecting section according to the present invention;
FIG. 8 is a schematic view of the structure of a first perforated plate according to the present invention;
fig. 9 is a schematic view of the structure of the second perforated plate of the present invention.
In the figure: 1. a container; 11. a first perforated plate; 12. a water storage cavity; 13. an outlet port; 14. a quartz sand layer; 2. a first pipeline; 21. a first peristaltic pump; 3. a second pipeline; 31. a second peristaltic pump; 4. a rainfall leaching device; 41. a housing; 42. a cover plate; 43. a second perforated plate; 44. a cavity; 45. a solution inlet; 5. a support structure; 6. a data acquisition unit; 7. an analysis platform; 10. a soil moisture monitoring section; 20. an ORP monitoring unit; 30. a soil sample collection part; 40. a water content monitoring section; 101. a soil moisture collector; 201. an ORP sensor; 301. a soil sample collection hole; 401. a water content sensor; 501. and a water pressure sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides a simulation experiment device for migration and conversion of pollutants caused by fluctuation of underground water level, wherein fig. 1 is a schematic structural diagram of the embodiment, and as shown in fig. 1, the simulation experiment device comprises a container 1, a first pipeline 2 and a second pipeline 3, wherein:
filling a soil sample in the container 1; the outer surface of the container 1 is connected with a water pressure monitoring part, a soil moisture monitoring part 10, an ORP monitoring part 20, a soil sample collecting part 30 and a moisture content monitoring part 40;
a first porous plate 11 is arranged in the container 1 and used for water seepage, a water storage cavity 12 is arranged at the bottom of the first porous plate 11 and the container 1 and used for storing water, and a discharge port 13 is arranged at the bottom of the container 1 and used for collecting effluent liquid; the first pipeline 2 and the second pipeline 3 are respectively connected with the top and the bottom of the container 1, and the first pipeline 2 and the second pipeline 3 are respectively provided with a first peristaltic pump 21 and a second peristaltic pump 31.
This device simulation overall process adopts through water pressure monitoring portion, moisture content monitoring portion 40, ORP monitoring portion 20 real-time supervision seepage flow field, the chemical field changes, and extract the water sample in aeration zone through soil moisture monitoring portion 10, extract soil through soil sample collection portion 30, monitoring pollutant infiltration process pollutant concentration distribution, pollutant migration transformation condition, seepage flow field change situation and chemical environment change situation, the physicochemical environment change of synchronous study aeration zone and saturated area, the cooperation is used even rainfall infiltration leaching device, real rainfall sight is simulated to the operative installations, aeration zone moisture migration monitoring and saturated area water level monitoring under the different rainfall sights can be accomplished.
As an optional implementation manner, the rainfall leaching device 4 is further included, fig. 2 is a schematic view of a main structure of the rainfall leaching device in this embodiment, as shown in fig. 2, the rainfall leaching device 4 is disposed at the top of the container 1, and a supporting device of rainfall leaching is disposed above the experimental device for simulating the migration and conversion of pollutants due to fluctuation of the groundwater level, so as to simulate a real rainfall process.
Specifically, the rainfall leaching device 4 includes a housing 41, a cover plate 42 and a second porous plate 43 disposed on the top of the housing 41, wherein: the interior of the housing 41 is provided with a cavity 44, the second porous plate 43 is arranged at the bottom of the cavity 44 and used for uniform rainfall, and is positioned between the rainfall leaching device 4 and the container 1, and the cover plate 42 is provided with a solution inlet 45. The simulation experiment device for migration and conversion of pollutants under the fluctuation of the underground water level can simulate different rainfall intensity scenes through the rainfall eluviation device 4. The simulation method can also be used for simulating the initial infiltration process of pollutants, the change process of the polluted soil under the rainfall eluviation condition and the like, and has wide application.
As an alternative embodiment, fig. 3 is a schematic top view of the container of the present embodiment, and as shown in fig. 3, the moisture content monitoring part 40, the ORP monitoring part 20, the soil moisture monitoring part 10, and the soil sample collection part 30 are uniformly arranged along the circumferential direction of the outer surface of the container 1.
In this embodiment, container 1 adopts the main part internal diameter to be 15cm, highly is 60 cm's cylinder structure, and the hole is established respectively on the cylinder four sides and is arranged different sensors and sampling hole, specifically includes: the simulation overall process adopts the seepage field and the chemical field change monitored in real time through pressure, water content and the ORP sensor, extracts the water sample of the aeration zone through the soil water collecting instrument, extracts the soil through the soil sample collecting hole on the side of the earth pillar, and monitors the pollutant concentration distribution, the pollutant migration and conversion condition, the seepage field change condition and the chemical environment change condition in the pollutant infiltration process.
Specifically, fig. 4 is a schematic structural diagram of the moisture content detection portion, and as shown in fig. 4, the moisture content monitoring portion 40 is configured to include a plurality of moisture content sensors 401, the plurality of moisture content sensors 401 are uniformly distributed along the height direction of the container 1, in this embodiment, the distance between every two moisture content sensors 401 is set to be 10cm, and four moisture content sensors 401 are totally configured from top to bottom to monitor moisture content information at different positions.
FIG. 5 is a schematic diagram of the structure of the ORP monitoring part, as shown in FIG. 5, the ORP monitoring part 20 is configured to include a plurality of ORP sensors 201, the plurality of ORP sensors 201 are uniformly distributed along the height direction of the container 1, in this embodiment, the distance between every two ORP sensors 201 is set to be 10cm, and five ORP sensors 201 are configured from top to bottom to monitor ORP information at different positions;
fig. 6 is a schematic structural diagram of the soil moisture monitoring section, as shown in fig. 6, the soil moisture monitoring section 10 is configured to include a plurality of soil moisture collectors 101, the plurality of soil moisture collectors 101 are uniformly distributed along the height direction of the container 1, in this embodiment, the distance between every two soil moisture collectors 101 is set to be 10cm, and five soil moisture collectors 101 are configured from top to bottom to collect soil moisture information at different positions;
fig. 7 is a schematic structural view of the soil sample collecting part, and as shown in fig. 7, the soil sample collecting part 30 includes a plurality of soil sample collecting holes 301, the plurality of soil sample collecting holes 301 are uniformly distributed along the height direction of the container 1, in this embodiment, the distance between every two soil sample collecting holes 301 is set to be 10cm, and five soil sample collecting holes 301 are provided from top to bottom in total to collect soil samples at different positions.
As an optional embodiment, the water pressure monitoring portion is configured to include a water pressure sensor 501, the water pressure sensor 501 is disposed at the bottom of the plurality of water content sensors 401, and the water pressure sensor 501 and the plurality of water content sensors 401 are equidistantly distributed on the water content monitoring portion 40 for monitoring the water pressure.
As an optional implementation mode, the system further comprises a data acquisition unit 6 and an analysis platform 7, the sensor real-time monitoring data is connected with a signal transmitting device through the data acquisition unit 6, is uploaded to the cloud platform through a wireless network, and is remotely read to carry out analysis.
Wherein: the data acquisition unit 6 is connected with the water content sensor 401, the water pressure sensor 501, the ORP sensor 201 and the soil moisture acquisition unit 101; the analysis platform 7 comprises a signal receiving device, the data acquisition device comprises a signal transmitting device, and the data acquisition device 6 is in wireless connection with the analysis platform 7.
During the use, water pressure sensor 501, moisture content sensor 401, ORP sensor 201 in this embodiment all pass through the data line and are connected to data collection station, connect signal transmitter and pass through wireless network with data and upload to the cloud platform. The soil moisture collector 101 collects a sample by an air pump. The experimental data result can be further used for carrying out model construction and fitting analysis in a numerical simulation mode.
As an alternative embodiment, the container 1 is of a cylindrical structure, and a plurality of support structures 5 are uniformly arranged on the bottom of the container 1 along the circumference of the container 1, are used for supporting the device, keep a certain distance from the ground, and can facilitate the drainage of the discharge port 13 or the connection with other external devices.
As an alternative embodiment, the top and the bottom of the soil sample are provided with the quartz sand layer 14, in this embodiment, the quartz sand layer 14 is made of coarse-grained quartz sand with a diameter of 0.5cm, the thickness of the quartz sand layer 14 is set to 1cm, and in this embodiment, the height of the actual filled soil sample is 50 cm.
As an alternative embodiment, the cover plate 42 is a transparent cover plate for easy observation, and a sealing structure, such as a sealing ring, is provided between the cover plate 42 and the housing 41 to ensure that the rainfall leaching device 4 has good sealing performance.
Alternatively, the aperture of each of the first porous plate 11 and the second porous plate 43 is set to 0.1 to 0.5cm, and the thickness of each of the first porous plate 11 and the second porous plate 43 is 1 cm. Preferably, fig. 8 is a schematic structural view of the first perforated plate of the present embodiment, as shown in fig. 8, the aperture of the first perforated plate 11 is set to 0.5cm, and fig. 9 is a schematic structural view of the second perforated plate of the present embodiment, as shown in fig. 9, the aperture of the second perforated plate 43 is set to 0.5cm or 0.2 cm.
The complete groundwater level fluctuation zone pollutant infiltration experimental process of the embodiment is as follows:
1. and (3) installing the water pressure sensor 501, the water content sensor 401, the ORP sensor 201 and the soil moisture collector 101, preparing a soil sample, and performing layered compaction.
2. The deionized water from bottom to top saturates the sand column, and the process of filling water is: and (3) opening a water stop valve of the first peristaltic pump 21, injecting simulated underground water from the bottom of the sand column by using the first peristaltic pump 21, keeping the rotating speed of the first peristaltic pump 21 at 5mL/min to ensure that the permeability meets the requirement, and stopping water supply when the experimental sand column is filled with water. And was stable for 2 hours after saturation.
3. The first peristaltic pump 21 was turned on and water was slowly pumped down to a water level of 10 cm. And after 2 hours of stabilization, collecting soil moisture to detect conventional indexes. And acquiring the physical and chemical parameter distribution under natural conditions.
4. When the time is 0, the first peristaltic pump 21 and the second peristaltic pump 31 are simultaneously turned on, the upper portion infiltration amount is larger than the lower portion discharge amount, and the water level slowly rises. And after the water level is stable, collecting soil moisture and detecting. Acquiring the influence of natural conditions on the physicochemical environment caused by the water level rise.
5. And reducing rainfall, gradually reducing the water level to 10cm, and stabilizing for 2 hours.
6. The prepared pollutant solution is pumped in, the upper infiltration amount is larger than the lower discharge amount, and the water level slowly rises. And after the water level is stable, collecting soil moisture and detecting. The pollutants are obtained to infiltrate along with rainfall, and the influence of the rise of the water level on the physical and chemical environment is obtained.
7. And reducing rainfall, gradually reducing the water level to 10cm, and stabilizing for 2 hours. At this point the cartridge is completely contaminated. Collecting soil moisture and soil samples.
The problem of the aeration zone and the water saturation zone synchronous monitoring seepage field and chemical field is solved, and the effect of synchronously researching the multi-field parameters of the underground water level fluctuation zone is achieved through the sensor arrangement and sampling device. Secondly, the simulation problem of the situation that the water level of underground water fluctuates due to the fact that pollutants seep along with rainfall is solved. The invention designs a matched rainfall leaching device, and considers the influence of rainfall on the fluctuation of the groundwater level.
The whole device controls the water level to rise and fall through the upper precipitation and the bottom outflow flow, after a stable seepage field is obtained, heavy metal (or other pollutants) solution with fixed concentration is continuously eluviated from the upper part of the model aiming at the situation that pollutants infiltrate from the earth surface and enter a saturated zone through an aeration zone, and the situation that the pollutants infiltrate downwards to influence the soil and the underground water is simulated.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides an utilize groundwater level fluctuation area pollutant migration conversion simulation experiment device's experimental method which characterized in that, its device structure includes container, first pipeline, second pipeline, wherein:
filling a soil sample in the container, wherein quartz sand layers are arranged at the top and the bottom of the soil sample;
the outer surface of the container is connected with a water pressure monitoring part, a water content monitoring part, an ORP monitoring part, a soil moisture monitoring part and a soil sample collecting part, and the water content monitoring part, the ORP monitoring part, the soil moisture monitoring part and the soil sample collecting part are uniformly arranged along the circumferential direction of the outer surface of the container;
a first porous plate is arranged inside the container, a water storage cavity is arranged at the bottom of the first porous plate and the container, and a discharge port is formed at the bottom of the container;
the first pipeline and the second pipeline are respectively connected with the top and the bottom of the container, and a first peristaltic pump and a second peristaltic pump are respectively arranged on the first pipeline and the second pipeline;
still include the rainfall eluviation device, the rainfall eluviation device set up in the top of container, wherein:
the rainfall eluviation device includes the casing, set up in apron and the second perforated plate at casing top, wherein:
a cavity is arranged in the shell, and the second porous plate is arranged at the bottom of the cavity and is positioned between the rainfall leaching device and the container;
the cover plate is provided with a solution inlet;
the water content monitoring part comprises a plurality of water content sensors which are uniformly distributed along the height direction of the container;
the soil moisture monitoring part comprises a plurality of soil moisture collectors which are uniformly distributed along the height direction of the container;
the experimental method comprises the following steps:
1) installing a water pressure sensor, a water content sensor, an ORP sensor and a soil moisture collector, preparing a soil sample, and compacting by layers;
2) the deionized water from bottom to top saturates the sand column, and the water filling process is as follows: opening a water stop valve of a first peristaltic pump, injecting simulated underground water from the bottom of the sand column by using the first peristaltic pump, keeping the rotating speed of the first peristaltic pump at 5mL/min to ensure that the permeability meets the requirement, stopping water supply when the experimental sand column is full of water, and stabilizing the experimental sand column after 2 hours of saturation;
3) opening the first peristaltic pump, slowly pumping water until the water level is 10cm, stabilizing for 2 hours, collecting soil moisture detection conventional indexes, and obtaining physical and chemical parameter distribution under natural conditions;
4) when the time is 0, the first peristaltic pump and the second peristaltic pump are started at the same time, the upper portion infiltration amount is larger than the lower portion discharge amount, the water level rises slowly, after the water level is stabilized, soil moisture is collected and detected, and the influence of the water level rise on the physical and chemical environment under the natural condition is obtained;
5) reducing rainfall, gradually reducing the water level to 10cm, and stabilizing for 2 hours;
6) pumping the prepared pollutant solution, wherein the infiltration amount of the upper part is larger than the drainage amount of the lower part, the water level slowly rises, after the water level is stable, collecting soil moisture and detecting to obtain the influence of the pollutant infiltration along with rainfall and the rise of the water level on the physical and chemical environment;
7) reducing rainfall, gradually reducing the water level to 10cm, stabilizing for 2 hours, completely polluting the column body at the moment, and collecting soil moisture and soil samples.
2. The experimental method of the experimental device for simulating the migration and transformation of the pollutants by utilizing the fluctuation of the groundwater level as claimed in claim 1, wherein:
the ORP monitoring part is provided to comprise a plurality of ORP sensors which are evenly distributed along the height direction of the container;
the soil sample collection portion includes a plurality of soil sample collection holes, and is a plurality of soil sample collection holes are followed the direction of height evenly distributed of container.
3. The experimental method of the experimental device for simulating the migration and transformation of the pollutants by utilizing the fluctuation of the groundwater level as claimed in claim 2, wherein: the water pressure monitoring portion is arranged to comprise water pressure sensors, the water pressure sensors are arranged at the bottoms of the soil sample collecting holes, and the water pressure sensors and the soil sample collecting holes are distributed on the soil sample collecting portion in an equidistance mode.
4. The experimental method of the experimental device for simulating the migration and transformation of the pollutants by utilizing the fluctuation of the groundwater level as claimed in claim 3, wherein: still include data collection station and analysis platform, wherein:
the data collector is connected with the water content sensor, the water pressure sensor, the ORP sensor and the soil moisture collector;
the analysis platform comprises a signal receiving device, the data acquisition device comprises a signal transmitting device, and the data acquisition device is in wireless connection with the analysis platform.
5. The experimental method of the experimental device for simulating the migration and transformation of the pollutants by utilizing the fluctuation of the groundwater level as claimed in claim 1, wherein: the container adopts a cylindrical structure, and a plurality of support legs are uniformly arranged at the bottom of the container along the circumferential direction of the container.
6. The experimental method of the experimental device for simulating the migration and transformation of the pollutants by utilizing the fluctuation of the groundwater level as claimed in claim 1, wherein: the cover plate is a transparent cover plate, and a sealing structure is arranged between the cover plate and the shell.
7. The experimental method for simulating the experimental apparatus for the migration and transformation of the pollutants by utilizing the fluctuation of the groundwater level as claimed in claim 1 or 6, wherein: the aperture of the first porous plate and the aperture of the second porous plate are both set to be 0.1-0.5 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010877991.7A CN112051383B (en) | 2020-08-27 | 2020-08-27 | Simulation experiment device for migration and transformation of pollutants in underground water level fluctuation zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010877991.7A CN112051383B (en) | 2020-08-27 | 2020-08-27 | Simulation experiment device for migration and transformation of pollutants in underground water level fluctuation zone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112051383A CN112051383A (en) | 2020-12-08 |
| CN112051383B true CN112051383B (en) | 2022-09-06 |
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