CN109297870B - Device and method for simulating migration rule of pollutants in soil under different rainfall intensity conditions - Google Patents
Device and method for simulating migration rule of pollutants in soil under different rainfall intensity conditions Download PDFInfo
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- CN109297870B CN109297870B CN201811427591.5A CN201811427591A CN109297870B CN 109297870 B CN109297870 B CN 109297870B CN 201811427591 A CN201811427591 A CN 201811427591A CN 109297870 B CN109297870 B CN 109297870B
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- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 80
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 80
- 230000005012 migration Effects 0.000 title claims abstract description 58
- 238000013508 migration Methods 0.000 title claims abstract description 58
- 239000002689 soil Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 136
- 239000007921 spray Substances 0.000 claims abstract description 86
- 238000001914 filtration Methods 0.000 claims abstract description 33
- 238000002474 experimental method Methods 0.000 claims abstract description 32
- 239000000706 filtrate Substances 0.000 claims abstract description 25
- 238000004088 simulation Methods 0.000 claims abstract description 7
- 238000005070 sampling Methods 0.000 claims description 29
- 230000001105 regulatory effect Effects 0.000 claims description 28
- 239000011800 void material Substances 0.000 claims description 12
- 239000000945 filler Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 230000002209 hydrophobic effect Effects 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 6
- 239000008400 supply water Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000000356 contaminant Substances 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000003802 soil pollutant Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a device for simulating a migration rule of pollutants in soil under different rainfall intensity conditions, which belongs to the field of environmental protection and comprises a spray water supply system, a pollutant migration experimental column, a filtrate collection system and a multi-layer support platform; the whole device is arranged on a multi-layer supporting platform, a top water supply tank and a lower water supply tank of a water supply system are connected through a metering pump and a rubber hose, the upper end and the lower end of a pollutant migration experiment column are both in an opening design, and the upper end and the lower end of the pollutant migration experiment column are respectively and fixedly connected with the water supply tank and a cylindrical filtering device of a filtrate collecting system through a threaded connection device; the spray water supply system comprises an upper water supply tank and a lower spray water tank, and a plate-type spray head is arranged at the bottom of the spray water tank. The invention also discloses a simulation method of the device. The device can be operated indoors, the simulated rainfall period is far smaller than the natural rainfall period, and the data required by the experiment can be obtained in a short time.
Description
Technical Field
The invention relates to an experimental simulation device for pollutant migration rules, belongs to the field of environmental protection, and particularly relates to a device for simulating the pollutant migration rules in soil under different rainfall intensity conditions and a simulation method thereof.
Background
The residual pollutants in the soil can permeate into the underground water under the scouring action of the rain water, so that the ecological environment is polluted, and the health and safety of human beings can be endangered, therefore, the migration rule of the pollutants in the soil under different rainfall intensity conditions is explored, and a powerful scientific basis can be provided for the control of the pollutants and the treatment of the ecological environment. In the process of performing experiments for simulating soil pollutant migration rules under different rainfall intensity conditions, in order to quickly obtain data required by the experiments in a given time, different rainfall intensity conditions are usually simulated by using an artificial rainfall simulation device.
However, some existing experimental devices have a number of disadvantages, such as: the migration rule of pollutants in soil under different rainfall intensity conditions cannot be well simulated; the soil sample and the gap water sample cannot be accurately layered, and the experimental error is large; the method can not meet the requirements of rainfall uniformity, and can not simulate different rainfall intensities.
Disclosure of Invention
The invention aims to overcome the defects, develop a device and a simulation method thereof for simulating the migration rule of pollutants in soil under different rainfall intensity conditions, regulate the water flow pumped into a spray water tank by regulating a metering pump, control the opening and closing of a plate-type spray head at the bottom of the spray water tank and the overflow speed of the plate-type spray head by regulating a spray head control valve, further achieve the purpose of simulating different rainfall intensity, and further determine the time-space difference characteristics and response mechanism of the pollutants in overlying water, soil and interstitial water under different rainfall intensity conditions by layering soil samples at different heights of a pollutant migration experiment column, interstitial water samples and collecting filtrate by a cylindrical filtering device.
The device is mainly technically characterized by comprising a spray water supply system, a pollutant migration experiment column, a filtrate collection system, a hose connecting device, a threaded connecting device and a multi-layer support platform, wherein the spray water supply system consists of an upper water supply tank and a lower spray water tank, the upper water supply tank and the lower water supply tank are connected through a metering pump and a rubber hose and are respectively arranged on the upper layer and the middle layer of the multi-layer support platform, a stainless steel air booster-type circular plate-type spray head is arranged at the bottom of the spray water tank, a control valve is arranged on the side surface of the bottom, the spray head is made of environment-friendly ABS resin, the overflow speed of the plate-type spray head can be controlled by adjusting the control valve, the pollutant migration experiment column is arranged on the lower side of the middle layer of the multi-layer support platform, the upper part is fixedly connected with the spray water tank through a first threaded connecting device, the bottom is fixedly connected with a cylindrical filtering device, the filtrate collection system consists of the cylindrical filtering device and a filtrate collector, and the bottom layer is arranged on the lower side of the multi-layer support platform.
Preferably, the spray water supply system comprises a water supply tank and a spray water tank, wherein the water supply tank and the spray water tank are connected through a metering pump and a rubber hose, liquid is pumped out of the water supply tank by the metering pump to flow into the spray water tank, a plate-type spray head is installed at the bottom of the spray water tank, a control valve is installed, the water flow rate of the pumped spray water tank is regulated by regulating a regulating hand wheel of the metering pump, the opening and closing of the plate-type spray head at the bottom of the spray water tank and the overflow speed of the plate-type spray head are realized through the control valve on the right side of the control plate-type spray head, and the purpose of simulating different rainfall intensities is achieved.
As the preference, vertical every interval 5cm evenly distributed in pollutant migration experimental column left side has the column type sampling mouth, and column type sampling mouth is used for taking the soil sample, and vertical every interval 2 cm in right side evenly distributed has the tubular sampling mouth, and the tubular sampling mouth is used for taking the clearance water sample, and pollutant migration experimental column is the opening design from top to bottom, and bottom exit is fixed with a circular sieve plate, circular sieve plate's radius is 25cm, and thickness is 1cm, and the bottom is through second threaded connection device and cylindricality filter equipment fixed connection, and pollutant migration experimental column inner wall is equipped with the helicitic texture, can effectively prevent the short flow phenomenon.
Preferably, the filtrate collecting system comprises a cylindrical filtering device and a replaceable filtrate collector, the top of the cylindrical filtering device is fixedly connected with the bottom of the pollutant migration experiment column through a first threaded connection device, the cylindrical filtering device is filled with polypropylene filler for hydrophilic pollutants, the filled void ratio is 1:8, the cylindrical filtering device is filled with inert high-alumina balls for hydrophobic pollutants, the filled void ratio is 1:9, a liquid outlet valve is arranged at the bottom of the cylindrical filtering device and is connected with the replaceable filtrate collector, and the volume of each replaceable filtrate collector is 500 mL.
A method for simulating migration rules of pollutants in soil under different rainfall intensity conditions is characterized by comprising the following steps: a device for simulating migration rules of pollutants in soil under different rainfall intensity conditions as claimed in claim 1, comprising the following steps:
first, filling filler into a cylindrical filtering device: for hydrophilic pollutants, filling polypropylene filler into the cylindrical filtering device, wherein the filling void ratio is 1:8, and for hydrophobic pollutants, filling inert high-alumina balls into the cylindrical filtering device, wherein the filling void ratio is 1:9;
secondly, loading homogenized soil samples required by experiments: homogenizing a soil sample for experiments, and uniformly paving and filling the soil sample into a pollutant migration experiment column;
thirdly, injecting water into the water supply tank: filling water required by the experiment into a water supply tank at the upper part of a spraying water supply system;
fourth, artificially simulating different rainfall intensities: starting a metering pump, pumping water from a water supply water tank into a spray water tank positioned below the water supply water tank by using the metering pump, adjusting the pumped water flow by adjusting an adjusting hand wheel of the metering pump, and controlling the opening and closing of a plate-type spray head at the bottom of the spray water tank and the overflow speed of the plate-type spray head by controlling a control valve at the side surface of the bottom of the spray water tank so as to achieve the aim of simulating different rainfall intensities;
fifthly, sampling and testing soil samples and interstitial water samples: a plurality of groups of soil samples are layered from a column sampling port of the pollutant migration experimental column, a plurality of groups of gap water samples are layered from a tube sampling port of the pollutant migration experimental column, all sampling operations can be performed in different time nodes, and then the concentration and the content of pollutants in the soil samples and the gap water samples are detected and analyzed;
sixth step: sampling and testing of deep leakage: the deep-layer leachate flowing out of the bottom of the cylindrical filtration device is collected by a filtrate collector, and then the concentration and the content of pollutants in the deep-layer leachate are detected and analyzed.
The invention has the advantages and effects that:
firstly, the device for simulating the migration rule of pollutants in soil under different rainfall intensity conditions is used for regulating the water flow pumped into the spray water tank by regulating the regulating handwheel of the metering pump, and controlling the opening and closing of the plate-type spray head at the bottom of the spray water tank and the overflow speed of the plate-type spray head by regulating the control valve at the bottom of the spray water tank, so that the aim of simulating different rainfall intensity is fulfilled;
secondly, the pollutant migration experimental column can take soil samples and gap water samples in a layered mode, a sieve plate is arranged at the bottom of the experimental column in a cushioning mode, and the design of the sieve plate is convenient for infiltration of solution in the experimental column while preventing soil loss; aiming at hydrophilic/hydrophobic pollutants, the polypropylene filler/inert high-alumina balls are respectively filled in the cylindrical filtering device, so that the loss of the pollutants in the filtrate caused by adsorption in the infiltration process is greatly reduced, and the accurate collection of the pollutants in the filtrate is facilitated;
secondly, this device can be at indoor operation, and the rainfall simulation cycle is far less than the natural rainfall cycle, can obtain the required data of experiment in the short time, and whole device is arranged in on the multilayer supporting platform, and upper and lower compact structure, clear and be convenient for remove, easy operation, with low costs, and each environmental factor is like: the temperature, the illumination and the like are controllable, so that the method has good popularization and use values.
Drawings
FIG. 1 is a schematic diagram of the structural principle of the invention.
The names of the components corresponding to the reference numerals in the figures are as follows:
1 water supply tank, 2 water inlet valve, 3 metering pump, 4 hose connecting device, 5 water outlet valve, 6 spray tank, 7 plate-type shower nozzle, 8 spray device control valve, 9 spray water supply system, 10 first screw connection device, 11 column sampling mouth, 12 tubular sampling mouth, 13 pollutant migration experimental column, 14 second screw connection device, 15 column filter device, 16 liquid outlet valve, 17 filtrate collector, 18 multilayer supporting platform, 19 universal wheel.
Detailed Description
The invention provides a device for simulating migration rules of pollutants in soil under different rainfall intensity conditions. The water supply tank at the top of the spray water supply system is connected with the spray water tank below through a rubber hose and a metering pump, liquid is pumped out of the water supply tank from the metering pump and flows into the spray water tank, a plate-type spray head is installed at the bottom of the spray water tank, a spray device control valve is installed, the water flow pumped into the spray water tank is regulated through regulating a regulating hand wheel of the metering pump, the opening and closing of the plate-type spray head at the bottom of the spray water tank and the overflow speed of the plate-type spray head are controlled through regulating the valve, the purpose of simulating different rainfall intensities is further achieved, and the soil sample, the gap water sample and the cylindrical filter device are collected at different heights of the pollutant migration experiment column to further determine the time-space different characteristics and response mechanisms of pollutants in overlying water, soil and gap water under different rainfall intensity conditions.
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the device for simulating the migration law of pollutants in soil under different rainfall intensity conditions comprises a spray water supply system 9, a pollutant migration experimental column 13, a cylindrical filtering device 15, a first threaded connection device 10, a second threaded connection device 14 and a multi-layer supporting platform 18. The spraying water supply system 9 is made of polymethyl methacrylate and consists of an upper water supply tank 1 and a lower spraying water tank 6, the upper part and the lower part are connected through a metering pump 3 and a rubber hose 4, the upper part and the lower part are respectively arranged on an upper layer supporting platform and a middle layer supporting platform of the multi-layer supporting platform 18, the spraying water tank 6 is fixedly connected with a pollutant migration experiment column 13 through a first threaded connection device 10, and a water inlet valve 2 and a water outlet valve 5 are respectively arranged at two ends of the rubber hose 4.
When the device is used, liquid is pumped out of the water supply water tank 1 from the metering pump 3 and flows into the spray water tank 6, the plate-type spray head 7 is arranged at the bottom of the spray water tank 6, the spray device control valve 8 is arranged, the water flow pumped into the spray water tank 6 is regulated by regulating the regulating hand wheel of the metering pump 3, the opening and closing of the plate-type spray head 7 at the bottom of the spray water tank 6 and the overflow speed are controlled by regulating the spray device control valve 8, and then the aim of simulating different rainfall intensities is achieved.
In the invention, the pollutant migration experimental column 13 is made of polymethyl methacrylate, the upper part and the lower part are both in an opening design, column type sampling ports 11 are uniformly distributed at each interval of 5cm in the vertical direction on the left side of the pollutant migration experimental column 13, tubular sampling ports 12 are uniformly distributed at each interval of 2 cm in the vertical direction on the right side, and space-time distribution characteristics and rules of pollutants in overlying water, soil and interstitial water are further determined under different rainfall intensity conditions by sampling at different heights of the pollutant migration experimental column 13 in a layering manner; the pollutant migration experiment column 13 is fixedly connected with the spray water tank 6 at the bottom of the spray water supply system 9 and the cylindrical filtering device 15 respectively through the first threaded connection device 10 and the second threaded connection device 14, and the inner wall of the pollutant migration experiment column 13 is provided with a threaded structure, so that the short flow phenomenon can be effectively prevented.
In the invention, the filtrate collecting system consists of a cylindrical filtering device 15 and a replaceable filtrate collector 17, and is made of polymethyl methacrylate material, wherein the top of the cylindrical filtering device 15 is fixedly connected with the bottom of a pollutant migration experiment column 13 through a second threaded connection device 14; for hydrophilic pollutants, polypropylene filler is filled in the cylindrical filtering device 15, the void ratio of the filling is 1:8, inert high-alumina balls are filled in the cylindrical filtering device 15 for hydrophobic pollutants, the void ratio of the filling is 1:9, a liquid outlet valve 16 is arranged at the bottom of the cylindrical filtering device 15 and is connected with replaceable filtrate collectors 17, and the volume of each replaceable filtrate collector 17 is 500 mL. Universal wheels 19 are arranged at four supporting feet of the multi-layer supporting platform 18, so that the whole device can be conveniently moved and placed.
In the invention, a device for simulating the migration rule of pollutants in soil under different rainfall intensity conditions comprises the following steps:
in a first step, the cylindrical filter device 15 is filled with a filler: for hydrophilic pollutants, filling polypropylene filler into the cylindrical filtering device 15, wherein the filling void ratio is 1:8; for hydrophobic contaminants, the column filter 15 was filled with inert high alumina spheres with a void fraction of 1:9.
Secondly, loading homogenized soil samples required by experiments: after homogenizing the soil sample used for the experiment, the soil sample was uniformly spread into the contaminant transfer column 13.
Thirdly, injecting water into the water supply tank 1: the water required by the experiment is filled into the water supply tank 1 at the upper part of the spray water supply system 9.
Fourth, artificially simulating different rainfall intensities: starting a metering pump 3, and pumping the water body out of the water supply water tank 1 by using the metering pump 3 to flow into a spray water tank 6 positioned below; the water flow of the pump is regulated by regulating the regulating handwheel of the metering pump 3, and the opening and closing of the plate-type spray head 7 at the bottom of the spray water tank 6 and the overflow speed are controlled by regulating the spray device control valve 8 at the bottom of the spray water tank 6, so that the aim of simulating different rainfall intensities is fulfilled.
Fifthly, sampling and testing soil samples and interstitial water samples: multiple groups of soil samples are layered and taken from a column sampling port 11 vertical to the left side of a pollutant migration experimental column 13, and multiple groups of gap water samples are layered and taken from a tube sampling port 12 vertical to the right side of the pollutant migration experimental column 13; all sampling operations can be performed at different time nodes, followed by detection and analysis of the concentration and content of contaminants in soil and interstitial water samples.
Sixth step: sampling and testing of deep leakage: the deep-layer leachate which flows out from the bottom of the column filtration device 15 is collected by a filtrate collector 17, and then the concentration and content of contaminants in the deep-layer leachate are detected and analyzed.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (4)
1. The utility model provides a device of pollutant migration law in soil under the different rainfall intensity conditions of simulation, its characterized in that: the device comprises a spraying water supply system (9), a pollutant migration experiment column (13), a filtrate collection system and a multi-layer support platform (18);
the spraying water supply system (9) comprises an upper water supply tank (1) and a lower water supply tank (6), wherein the water supply tank (1) and the lower water supply tank are respectively arranged on the upper layer and the middle layer of the multi-layer supporting platform (18), the water supply tank (1) and the water supply tank (6) are connected through a hose connecting device (4), and a metering pump (3) is arranged on the hose connecting device (4);
the stainless steel air booster-type circular plate type spray head (7) is arranged at the bottom of the spray water tank (6), the control valve (8) is arranged on the side surface of the bottom of the spray water tank (6), the water flow pumped into the spray water tank (6) is regulated by regulating the regulating handwheel of the metering pump (3), the opening and closing of the plate type spray head (7) at the bottom of the spray water tank (6) and the overflow speed of the plate type spray head (7) are realized by regulating the control valve (8), and then the aim of simulating different rainfall intensities is achieved;
the pollutant migration experiment column (13) is arranged at the lower side of the middle layer of the multi-layer support platform (18), and the upper part of the pollutant migration experiment column (13) is fixedly connected with the spray water tank (6) through the first threaded connection device (10);
the filtrate collection system is arranged at the lower side of the bottom layer of the multi-layer support platform (18) and comprises a cylindrical filtering device (15) and a replaceable filtrate collector (17), the cylindrical filtering device (15) is fixedly connected with the bottom of the pollutant migration experiment column (13) through a second threaded connection device (14), and the replaceable filtrate collector (17) is used for collecting deep seepage flowing out of the bottom of the cylindrical filtering device (15);
for hydrophilic pollutants, the cylindrical filtering device (15) is filled with polypropylene filler, and the void ratio of the filling is 1:8; aiming at hydrophobic pollutants, inert high-alumina balls are filled in the cylindrical filtering device (15), the filled void ratio is 1:9, and a liquid outlet valve (16) is arranged at the bottom of the cylindrical filtering device (15);
the water supply tank (1) and the lower spray tank (6) are made of polymethyl methacrylate, the density of the plate-type spray head (7) is 15 meshes, and the spray nozzle is made of environment-friendly ABS resin.
2. A device for simulating migration laws of pollutants in soil under different rainfall intensity conditions as claimed in claim 1, wherein: column sampling ports (11) are uniformly distributed on one side of the pollutant migration experimental column (13) vertically at each interval of 5cm, and the column sampling ports (11) are used for sampling soil samples;
the other side of the pollutant migration experimental column (13) is vertically and uniformly provided with tubular sampling ports (12) at intervals of 2 cm, and the tubular sampling ports (12) are used for taking gap water samples;
the upper part and the lower part of the pollutant migration experiment column (13) are respectively designed into an opening;
a circular sieve plate is fixed at the outlet of the bottom of the pollutant migration experimental column (13), and the radius of the circular sieve plate is 25cm, and the thickness of the circular sieve plate is 1cm;
the inner wall of the pollutant migration experiment column (13) is provided with a thread structure.
3. A device for simulating migration laws of pollutants in soil under different rainfall intensity conditions as claimed in claim 1, wherein: the volume of each replaceable filtrate collector is 500 mL.
4. A method for simulating migration rules of pollutants in soil under different rainfall intensity conditions is characterized by comprising the following steps: the method is realized by adopting the device for simulating the migration rule of pollutants in soil under different rainfall intensity conditions according to any one of claims 1-3, and comprises the following steps:
firstly, filling filler into a cylindrical filtering device (15): for hydrophilic pollutants, filling polypropylene filler into the cylindrical filtering device (15), wherein the filling void ratio is 1:8, and for hydrophobic pollutants, filling inert high-alumina balls into the cylindrical filtering device (15), wherein the filling void ratio is 1:9;
secondly, loading homogenized soil samples required by experiments: after homogenizing the soil sample for experiment, uniformly paving and filling the soil sample into a pollutant migration experiment column (13);
thirdly, injecting water into the water supply tank (1): filling water required by experiments into a water supply tank (1) at the upper part of a spray water supply system (9);
fourth, artificially simulating different rainfall intensities: starting a metering pump (3), pumping water from a water supply water tank (1) into a spray water tank (6) positioned below the water supply water tank (1) by using the metering pump (3), regulating the pumped water flow by regulating a regulating hand wheel of the metering pump (3), and controlling the opening and closing of a plate-type spray head (7) at the bottom of the spray water tank (6) and the overflow speed of the plate-type spray head (7) by controlling a control valve (8) at the side surface of the bottom of the spray water tank (6), so as to realize the purpose of simulating different rainfall intensities;
fifthly, sampling and testing soil samples and interstitial water samples: multiple groups of soil samples are taken in layers from a column sampling port (11) vertical to a pollutant migration experimental column (13), multiple groups of gap water samples are taken in layers from a tube sampling port (12) vertical to the pollutant migration experimental column (13), all sampling operations can be performed in different time nodes, and then the concentration and the content of pollutants in the soil samples and the gap water samples are detected and analyzed;
sixth step: sampling and testing of deep leakage: the deep seepage liquid flowing out from the bottom of the cylindrical filtering device (15) is collected by a filtrate collector (17), and then the concentration and the content of pollutants in the deep seepage liquid are detected and analyzed.
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| CN113588209A (en) * | 2021-07-30 | 2021-11-02 | 交通运输部天津水运工程科学研究所 | Experimental device and method for phosphorus flux water tank in river |
| CN113655200A (en) * | 2021-08-11 | 2021-11-16 | 辽宁大学 | Soil heavy metal migration simulation soil column rainfall leaching experimental device and experimental method |
| CN114994245A (en) * | 2022-05-19 | 2022-09-02 | 浙江大学 | Microuniverse test device and method for simulating migration and transformation of pollutants in multi-media |
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| CN201348841Y (en) * | 2008-12-22 | 2009-11-18 | 西北农林科技大学 | Portable easily-installed movable rainfall simulating device |
| CN201749072U (en) * | 2010-07-16 | 2011-02-16 | 沈阳大学 | Leaching device for transfer and conversion of pollutants in soil |
| CN202041523U (en) * | 2011-03-07 | 2011-11-16 | 南昌大学 | Soil nutrient vertical migration leaching device |
| CN105277476A (en) * | 2014-07-16 | 2016-01-27 | 江苏常环环境科技有限公司 | Soil pollutant vertical migration simulator |
| CN205384202U (en) * | 2016-01-01 | 2016-07-13 | 三峡大学 | Rainfall infiltration law test system based on aqueous vapor two -phase flow |
| CN106248900A (en) * | 2016-08-10 | 2016-12-21 | 同济大学 | A kind of for the low experimental system affecting development facility simulation of water quality |
| CN206420686U (en) * | 2016-12-17 | 2017-08-18 | 南华大学 | A kind of soil leaching experimental provision |
| CN206671328U (en) * | 2016-12-28 | 2017-11-24 | 环境保护部南京环境科学研究所 | A kind of original position soil gathers dystopy Simulated soil columns leaching device |
| CN209198260U (en) * | 2018-11-27 | 2019-08-02 | 扬州大学 | A kind of device for simulating contaminant transportation rule in different rainfall intensity Soil Under Conditions |
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