CN105466815B - The simulator and application method that groundwater pollutant migrates under the conditions of more flowing - Google Patents
The simulator and application method that groundwater pollutant migrates under the conditions of more flowing Download PDFInfo
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- CN105466815B CN105466815B CN201610020021.9A CN201610020021A CN105466815B CN 105466815 B CN105466815 B CN 105466815B CN 201610020021 A CN201610020021 A CN 201610020021A CN 105466815 B CN105466815 B CN 105466815B
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- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 29
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 29
- 239000003673 groundwater Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 96
- 239000011521 glass Substances 0.000 claims abstract description 66
- 239000002689 soil Substances 0.000 claims abstract description 54
- 238000004088 simulation Methods 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 238000003895 groundwater pollution Methods 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 50
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 26
- 239000006004 Quartz sand Substances 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- 239000004677 Nylon Substances 0.000 claims description 13
- 229910052786 argon Inorganic materials 0.000 claims description 13
- 229920001778 nylon Polymers 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 238000007605 air drying Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000013508 migration Methods 0.000 claims description 3
- 230000005012 migration Effects 0.000 claims description 3
- 230000003204 osmotic effect Effects 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 239000013049 sediment Substances 0.000 abstract description 4
- 230000008021 deposition Effects 0.000 abstract description 3
- 230000009466 transformation Effects 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012790 confirmation 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
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011026 diafiltration Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000002352 surface water Substances 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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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses it is a kind of more flow under the conditions of the simulator that migrates of groundwater pollutant and application method, belong to groundwater pollution simulation instrument and equipment technical field, including pressure supply, water supply, earth pillar and connect sample unit；Pressure supply unit include outlet be equipped with pressure reducing valve pressure cylinder, water supplying unit include can pressure-bearing closed Organic glass column I；Earth pillar unit include can pressure-bearing closed Organic glass column II, Simulated soil columns are equipped in Organic glass column II, the top and bottom of Simulated soil columns are aqueous surface sediments, and middle part is aquiclude deposition medium；Connecing sample unit includes steady water tank and the graduated sampler of mark；Pressure reducing valve, Organic glass column I and Organic glass column II are sequentially connected by conduit, and Organic glass column II, steady water tank pass sequentially through conduit with sampler and be connected to.Easy to operate the present invention provides the high water head difference of underground water leakage-releasing water and the reducing environment of aquiclude, more stream head difference 0-15m, easy to adjust, test data is more accurate, reliable.
Description
Technical field
The present invention relates to groundwater pollution simulation instrument and equipment technical fields.
Background technique
Along with the acceleration of industrialization and Development of China's Urbanization, surface water and groundwater pollution tendencies are constantly aggravated.Shallow-layer
Being lauched mining rate due to water quality deterioration reduces, and mining rate is continuously increased deep phreatic water due to water quality is preferable；Shallow-layer and depth
Layer underground water head continues to increase, and then makes the phreatic water leakage-releasing water deep water polluted, leads to deep phreatic water water
Matter deteriorates.
Aquiclude is the tie that shallow-layer is connect with deep layer water-bearing layer, plays conduction water pressure and transmission solute component function.
Aquiclude media particle is small, micropore is more, and underground water mainly exists in the form of combining water, is often in weak reducing environment.Cause
This, there are significant differences with water-bearing layer for Water Transport feature and the transport kinetics rule of pollutant in aquiclude.Earth pillar mould
Important research method of the type as contaminant transportation dynamics problem, has obtained common concern and extensive use, and emerged in large numbers one
Large quantities of soil column leaching devices.For example, " a kind of device that analysis pollutant migrates in different media " of Li Peijun et al. design,
It can simulate etc. after connection Markov bottle and be seeped under the stabilization of heads；The designs such as Wang Minjian " a kind of research pollutant moves in the soil
The method and apparatus for moving and converting " can study the volatilization, diafiltration and degradation of pollutant in soil, be unsaturated soil column experiments；
" temperature control-pressure control underground water transfluent pollution simulation system " of Ma Chuanming et al. design can be used to steady temperature and pressure, wherein
Pressure controls to realize that streaming system is got in physical analogy by booster pump.
Reflect that current earth pillar model has following several defects in previous research: first, the soil used at this stage
Column device is designed as the hydraulics of unsaturation or low pressure-bearing mostly, can not simulated groundwater more flow under the conditions of pollutant move
Mobile Laws of Mechanics；Second, only several high pressure earth pillars do not account for chemical environment but, such as underground water many places in aquiclude
In reducing environment, oxidation environment can be generated if being pressurized with booster pump, and cause isotope of redox-sensitive pollutant (such as NH4+,
SO42- etc.) Transport And Transformation in aquiclude runs counter to underground actual conditions.Current device cannot achieve chemical fields-
The test simulation of physic field coupling, and test simulation can only be carried out for single game (only considering pressure, water chemistry).
Therefore, a kind of actual conditions when being more nearly leakage-releasing water how to be researched and developed, high water head that leakage-releasing water is provided it is poor
The contaminant transportation simulator of pressure head can be adjusted with the reducing environment of aquiclude and accurately and easily, and avoided
The Forms Transformation runed counter to actual conditions occurs when testing simulation for the pollutant of isotope of redox-sensitive, is those skilled in the art
The technical issues of urgent need to resolve.
Summary of the invention
The technical problem to be solved in the present invention, be to provide it is a kind of more flow under the conditions of groundwater pollutant migrate simulator
And its application method, experimental enviroment provide the high water head difference of leakage-releasing water and going back for aquiclude closer to actual conditions
Former environment can accurately and easily adjust pressure head, and avoid the pollutant of isotope of redox-sensitive when experiment is simulated
The Forms Transformation runed counter to actual conditions keeps test data more accurate, reliable.
In order to solve the above technical problems, the technical solution used in the present invention is:
More flow under the conditions of groundwater pollutant migrate simulator, including be successively linked in sequence pressure supply unit, supply water
Unit, earth pillar unit and connect sample unit；
The pressure supply unit includes the pressure cylinder that outlet is equipped with pressure reducing valve, and the pressure cylinder is high-purity argon gas cylinder；Institute
State that water supplying unit includes an inside equipped with simulating pollution underground water can pressure-bearing closed Organic glass column I, organic glass
I upper end of glass column is connect by conduit with pressure reducing valve, the earth pillar unit include one can pressure-bearing closed Organic glass column II, institute
It states Simulated soil columns and is followed successively by quartz sand layer I, viscous soil horizon and quartz sand layer II from top to bottom, be equipped with simulation in Organic glass column II
Earth pillar simulates deposition medium (comprising upper and lower water-bearing layer and middle part aquiclude), and the bottom end of the Organic glass column I passes through
Conduit is connected to the top of Organic glass column II, and the sample unit that connects includes steady water tank and marks graduated sampler, described to have
The bottom end of machine glass column II is connected to by conduit with steady water tank bottom end, and the steady water tank is connected to by conduit with sampler.
Preferably, purity of argon >=99.999% in the high-purity argon gas cylinder.
Preferably, in the Simulated soil columns between every two media be equipped with nylon gauze, II bottom of quartz sand layer with
Nylon gauze also is provided between water outlet, nylon gauze aperture density is 50 to 500 mesh.
Preferably, the Organic glass column I and Organic glass column II include cylinder, the fastener at the top of cylinder
I, sieve filter membrane frid and the fastener II positioned at cylinder bottom, sieve filter membrane frid are located at the intracorporal earth pillar top of column, fastening
Part I is fixed with cylinder by washer and nut respectively with fastener II.
Preferably, the high 100cm of cylinder, internal diameter 10cm, cylinder is respectively marked with scale, precision 1mm, sieve from bottom to top
Net filter membrane frid aperture is 500 mesh.
Preferably, the conduit is polyfluortetraethylene pipe.
Preferably, stainless steel inner lining tube is equipped in conduit between the pressure reducing valve and Organic glass column I, pressure reducing valve
Card slot is equipped in connector, inner hole 3mm is threadedly coupled, and conduit and I junction of Organic glass column are sealed by taper rubber plug plug.
Preferably, the Organic glass column I and II bottom of Organic glass column are equipped with A-frame.
Preferably, the steady water tank is made of polypropylene centrifuge tube, volume 10ml, internal diameter 10mm, steady water tank enter
The mouth of a river is located at the half of steady water tank side in bottom, outlet.
The application method for the simulator that groundwater pollutant migrates under the conditions of more flowing, use are described in any item among the above
The simulator that groundwater pollutant migrates under the conditions of more flowing, the specific steps are as follows:
The first step, cohesive soil excessive hole sizer after air-drying grinding, and be fitted into Organic glass column II by the bulk density of undisturbed soil,
In top layer and bottom the laying quartz sand of cohesive soil, filling using layering filling method, mono- layer of every 1cm, every layer is completed with compacting
Device compacting, the ball woll of soil layer surface, then fills out next layer, does not plan a successor phenomenon to avoid Simulated soil columns in experimentation；
Second step injects deionized water from II lower end of Organic glass column, and to drive away bubble in Simulated soil columns, guarantee was tested
Simulated soil columns are in water-saturated state in journey, and until water layer occurs in Simulated soil columns top, i.e., Simulated soil columns reach water-saturated state；
Third step after water of satisfying, Organic glass column II and Organic glass column I, pressure cylinder is linked in sequence, pressure reducing valve is adjusted
Outlet pressure to the numerical value of test setting, permeated with simulating pollution underground water on top, every 2h takes a sample, can be used for subsequent
Hydrochemical analyse, while recording out the flow of flow liquid, volume.
The beneficial effects of adopting the technical scheme are that the present invention is passed through first is that pressurizeed using pressure cylinder
Pressure head needed for pressure reducing valve control switch adjusts test, had both avoided passing through the lesser office of head difference range of Markov bottle simulation
It is sex-limited, the disturbance that booster pump pressurizes to chemical environment is in turn avoided, experimental enviroment provides more stream and mend closer to actual conditions
The reducing environment of the high water head difference and aquiclude given can accurately and easily adjust pressure head, keep test data more quasi-
Really, reliably, and avoid the pollutant of isotope of redox-sensitive that the Forms Transformation runed counter to actual conditions occurs when testing simulation；Two
It is that each unit is both the entirety mutually organically combined in system provided by the invention, while again can be flexible between each unit
Disassembly, easy to assembly, each unit is simple and easy to get, is laboratory common materials.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of the invention；
Fig. 2 is the joint structure schematic diagram of pressure reducing valve and conduit connection；
Fig. 3 is the working principle of the invention block diagram；
Each figure number title are as follows: 1-pressure cylinder, 2-pressure reducing valves, 3-connectors, 4-conduits, 5-fasteners I, 6-sieves
Filter membrane frid, 7-cylinders, 8-fasteners II, 9-nylon gauzes, 10-A-frames, 11-steady water tanks, 12-samplers,
13-Organic glass columns I, 14-Organic glass columns II, 15-internal lining pipes, 16-taper rubber plug plugs, 17-nuts.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the present invention includes the pressure supply unit being successively linked in sequence, water supplying unit, earth pillar unit and connects sample list
Member；The pressure supply unit includes that outlet is equipped with the offer pressure of pressure reducing valve 2 and the pressure cylinder 1 of reducing environment, the pressure reducing valve 2
Inlet pressure is reduced into the outlet pressure of setting and keeps stable, the pressure cylinder 1 is preferably high-purity argon gas cylinder, purity of argon
>=99.999%；The water supplying unit include an inside equipped with groundwater pollution simulation liquid, can pressure-bearing, closed organic glass
Column I 13, I 13 upper end of Organic glass column are connect by conduit with pressure reducing valve 2；The earth pillar unit include one can pressure-bearing
Closed Organic glass column II 14, the top and bottom of Organic glass column II 14 load aqueous surface sediments, and middle part loads weak permeable
Surface sediments medium (i.e. simulation deposition medium), the Simulated soil columns are followed successively by (the simulation water-bearing layer of quartz sand layer I from top to bottom
Deposit), viscous soil horizon (simulation aquiclude deposit) and quartz sand layer II (simulating aqueous surface sediments), every two in earth pillar
It is equipped with nylon gauze 9 between kind medium, avoids top quartz sand layer I from leaking into the viscous soil horizon at middle part, while preventing cohesive soil
Soil in layer is scattering into the quartz sand layer II of bottom, also is provided with nylon yarn between II bottom of quartz sand layer and water outlet
The nylon gauze 9 of cloth, the bottom is then filtered water outlet, avoids taking particulate matter into Simulated soil columns out of, the nylon yarn cloth hole
Diameter density is 50 to 500 mesh (selecting suitable mesh number according to the size of media particle size), and the bottom end of the Organic glass column I 13 is logical
Conduit 4 is crossed to be connected to the top of Organic glass column II 14, the Organic glass column I 13 and the Organic glass column II 14 from lower and
On be respectively marked with scale, precision 1mm；The sample unit that connects includes steady water tank 11 and the graduated sampler 12 of mark, it is preferred that institute
It states steady water tank 11 to be made of polypropylene centrifuge tube, volume 10ml, internal diameter 10mm, steady 11 water inlet of water tank is in bottom, outlet
At steady 11 side half of water tank, it can prevent air from entering in the hole of the medium in Simulated soil columns, avoid blocking
The bottom end of the migration pathway of underground water, the Organic glass column II 14 is connected to by conduit 4 with steady 11 bottom end of water tank, the steady water
Case 11 is connected to by conduit 4 with sampler 12, and the sampler 12 preferably uses graduated cylinder, and graduated cylinder is glass material, Ke Yizhun
Really read the volume of efflux；Above-mentioned conduit 4 is all made of polyfluortetraethylene pipe.
In this experimental provision, quartz sand layer I and II height of quartz sand layer is 50mm, partial size is 2 to 4mm, for simulating
Lower water-bearing layer, viscous soil horizon are used to simulate the aquiclude between two water-bearing layers, and high-purity argon gas cylinder carrys out simulated groundwater and gets over
Pass through the osmotic pressure and weak reducing environment of aquiclude when stream supply.Experimental temperature is controlled at 13 to 15 DEG C, under closely
The actual environment of water.2 outlet pressure of high-purity argon gas cylinder pressure reducing valve is adjusted to 0.25MPa to simulate more flowing pressure (15m head
Difference), and the weak reducing environment supplied subsurface water.When experiment, the underground of the NH4Cl simulation ammonium nitrogen pollution of 90mg/L can be used
Water, wherein Cl- can be used as the transportion and transformation of conservative ion in tracer instruction underground water.It is adopted when loading Simulated soil columns
With layering filling method, mono- layer of every 1cm, every layer completes and is compacted with compactor, the ball woll of soil layer surface, then fills out next layer, to avoid
Earth pillar does not plan a successor phenomenon in experimentation.
Further, the Organic glass column I 13 and Organic glass column II 14 include cylinder 7, positioned at 7 top of cylinder
Fastener I 5, sieve filter membrane frid 6 and the fastener II 8 positioned at 7 bottom of cylinder, 7 precision of cylinder is 1mm, using medical grade height
Precision thickeies glass production, and fastener I 5 and fastener II 8 use high density polyoxymethylene plastic production, sieve filter membrane frid 6
In the aquiclude Simulated soil columns top in cylinder 7, play the role of uniform gas distribution and cloth liquid, fastener I 5 and fastener II 8
It is fixed respectively with cylinder 7 by washer and nut；Further, the cylinder 7 is 100cm high, internal diameter 10cm, sieve filter membrane frid
6 apertures are 500 mesh.
Further, the Organic glass column I 13 and II 14 bottom of Organic glass column are equipped with A-frame 10.
Further, it is equipped with stainless steel inner lining tube 15 in the conduit 4 between the pressure reducing valve 2 and Organic glass column I 13, subtracts
Card slot is equipped in the connector 3 of pressure valve 2, inner hole 3mm is threadedly coupled, and conduit 4 and I 13 junction of Organic glass column pass through conical rubber
Plug 16 is filled in seal.
The application method for the simulator that groundwater pollutant migrates under the conditions of more flowing, use are described in any item among the above
The simulator that groundwater pollutant migrates under the conditions of more flowing, the specific steps are as follows:
The first step, cohesive soil crosses the porous sieve of 100 purposes after air-drying grinding, and is packed into organic glass by the bulk density of undisturbed soil
In column II 14, the quartz sand of 5cm is respectively laid in the top layer and bottom of cohesive soil to simulate water-bearing layer up and down, top layer is quartz sand layer
I, bottom is quartz sand layer II, and II bottom end of quartz sand layer uses the nylon gauze of 200 mesh as loaded filter to prevent cohesive soil particle
Exhalant canal is blocked, is separated between every layer of medium with 200 mesh nylon gauzes, using layering filling method, every 1cm mono- when loading earth pillar
Layer, every layer completes and is compacted with compactor, the ball woll of soil layer surface, then fills out next layer, goes out to avoid Simulated soil columns in experimentation
Existing fault-layer-phenomenon；Second step injects deionized water from II 14 lower end of Organic glass column, to drive away the bubble in Simulated soil columns, protects
Simulated soil columns are in water-saturated state during confirmation is tested, and until water layer occurs in Simulated soil columns top, i.e., Simulated soil columns reach full
Water state；Third step satisfies after water, Organic glass column II 14 and Organic glass column I 13, pressure cylinder 1 is linked in sequence, adjusting subtracts
The outlet pressure of pressure valve 2 is permeated with simulating pollution underground water on top, every 2h takes a sample, can use to the numerical value of test setting
In subsequent hydrochemical analyse, while recording out the flow of flow liquid, volume.
Device provided by the invention can simulating pollution object in underground water leakage-releasing water Transport And Transformation effect, proving ring
Border provides the high water head difference of leakage-releasing water and the reducing environment of aquiclude closer to actual conditions, can be accurately and easily
Pressure head is adjusted, and the form for avoiding the pollutant of isotope of redox-sensitive from occurring to run counter to actual conditions when testing simulation turns
Change, keep test data more accurate, reliable, measurement is convenient, error is small, and the high pressure reducing environment created is close to underground water
True environment；Dispersion coefficient, infiltration coefficient can be calculated by the data obtained in present apparatus experimentation simultaneously
Etc. parameters.The present apparatus is improved by connecting the pressure cylinder of inert gas, simulates ammonium nitrogen using the NH4Cl of 90mg/L
When the underground water of pollution, the present embodiment experimental result is shown, NO3-, NO2- concentration maintain always reduced levels in flow liquid out,
That is in a reducing environment, modal conversion is substantially not present mainly based on suction-operated in NH4+, and if in oxygen
The reactions such as nitrification generation NO3- may be occurred by changing NH4+ in environment, this will be runed counter to actual conditions, be unable to reach interior
Experimental simulation device restores the purpose of contaminant transportation conversion process in practical underground water.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is common
Technical staff under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, may be used also
By make it is many in the form of specific transformation, within these are all belonged to the scope of protection of the present invention.
Claims (8)
1. the simulator that groundwater pollutant migrates under the conditions of more flowing, it is characterised in that: including the pressure supply being successively linked in sequence
Unit, water supplying unit, earth pillar unit and connect sample unit；
The pressure supply unit includes the pressure cylinder (1) that outlet is equipped with pressure reducing valve (2), and the pressure cylinder (1) is high-purity argon gas
Pass through the osmotic pressure and weak reducing environment of aquiclude when bottle, the high-purity argon gas cylinder carry out simulated groundwater leakage-releasing water；Institute
State it is that water supplying unit includes an inside equipped with groundwater pollution simulation liquid, can pressure-bearing, closed Organic glass column I (13), institute
It states Organic glass column I (13) upper end to connect by conduit (4) with pressure reducing valve (2), the pressure reducing valve (2) and Organic glass column I
(13) stainless steel inner lining tube (15) are equipped in the conduit (4) between；The earth pillar unit includes that an inside is filled with simulation soil
The closed Organic glass column II (14) of column, the Simulated soil columns are followed successively by quartz sand layer I, viscous soil horizon and quartz sand from top to bottom
Layer II is equipped with nylon gauze in the Simulated soil columns, between II bottom of quartz sand layer and water outlet between every two media
Equipped with nylon gauze, nylon gauze aperture density is 50 to 500 mesh；The Organic glass column I (13) and Organic glass column II
(14) include cylinder (7), be located at cylinder (7) at the top of fastener I (5), sieve filter membrane frid (6) and be located at cylinder (7) bottom
The fastener II (8) in portion, sieve filter membrane frid (6) are located at the Simulated soil columns top in cylinder (7), fastener I (5) and fastener
II (8) are fixed with cylinder (7) by washer and nut respectively；The bottom end of the Organic glass column I (13) passes through conduit (4) and has
The top of machine glass column II (14) is connected to, and the top link position of the conduit (4) and Organic glass column II (14) is higher than described
The bottom end of Organic glass column I (13)；The sample unit that connects includes steady water tank (11) and marks graduated sampler (12), described steady
Water tank (11) water inlet is located on the right side of steady water tank (11) in bottom, outlet, and the bottom end of the Organic glass column II (14) is by leading
Pipe (4) is connected to steady water tank (11) bottom end, and the exit of the steady water tank (11) is higher than the bottom of the Organic glass column II (14)
End, the steady water tank (11) are connected to by conduit (4) with sampler (12).
2. the simulator that groundwater pollutant migrates under the conditions of more stream according to claim 1, it is characterised in that: described
Purity of argon >=99.999% in high-purity argon gas cylinder.
3. the simulator that groundwater pollutant migrates under the conditions of more stream according to claim 1, it is characterised in that: described
Cylinder (7) high 100cm, internal diameter 10cm, sieve filter membrane frid (6) aperture are 500 mesh.
4. the simulator that groundwater pollutant migrates under the conditions of more stream according to claim 1, it is characterised in that: described
Conduit (4) is polyfluortetraethylene pipe.
5. the simulator that groundwater pollutant migrates under the conditions of more stream according to claim 1, it is characterised in that: described
Card slot is equipped in the connector (3) of pressure reducing valve (2), inner hole 3mm is threadedly coupled, and conduit passes through with Organic glass column I (13) junction
Taper rubber plug plug (16) sealing.
6. the simulator that groundwater pollutant migrates under the conditions of more stream according to claim 1, it is characterised in that: described
Organic glass column I (13) and Organic glass column II (14) bottom are equipped with A-frame (10).
7. the simulator that groundwater pollutant migrates under the conditions of more stream according to claim 1, it is characterised in that: described
Steady water tank (11) is made of polypropylene centrifuge tube, and volume 10ml, internal diameter 10mm, steady water tank (11) water inlet is in bottom, out
Mouth is located at the half of steady water tank (11) side.
8. the application method for the simulator that groundwater pollutant migrates under the conditions of more flowing, it is characterised in that: described more to flow condition
Groundwater pollutant under the conditions of the simulator of lower groundwater pollutant migration is more flowed using claim 1-7 is described in any item
The simulator of migration, specifically used step include:
The first step, cohesive soil excessive hole sizer after air-drying grinding, and be fitted into Organic glass column II (14) by the bulk density of undisturbed soil,
In top layer and bottom the laying quartz sand of cohesive soil, filling using layering filling method, mono- layer of every 1cm, every layer is completed with compacting
Device compacting, the ball woll of soil layer surface, then fills out next layer, does not plan a successor phenomenon to avoid Simulated soil columns in experimentation；
Second step injects deionized water from Organic glass column II (14) lower end, and to drive away bubble in Simulated soil columns, guarantee was tested
Simulated soil columns are in water-saturated state in journey, and until water layer occurs in Simulated soil columns top, i.e., Simulated soil columns reach water-saturated state；
After water of satisfying, Organic glass column II (14) and Organic glass column I (13), pressure cylinder (1) are linked in sequence for third step, institute
Stating pressure cylinder (1) is high-purity argon gas cylinder, by aquiclude when the high-purity argon gas cylinder carrys out simulated groundwater leakage-releasing water
Osmotic pressure and weak reducing environment adjust the outlet pressure of pressure reducing valve (2) to the numerical value of test setting, with simulating pollution underground water
It is permeated on top, every 2h takes a sample, while recording out the flow of flow liquid, volume.
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