CN106680466A - Device for simulating soil groundwater oxygen content gradient distribution under hydrostatic condition - Google Patents
Device for simulating soil groundwater oxygen content gradient distribution under hydrostatic condition Download PDFInfo
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- CN106680466A CN106680466A CN201710065078.5A CN201710065078A CN106680466A CN 106680466 A CN106680466 A CN 106680466A CN 201710065078 A CN201710065078 A CN 201710065078A CN 106680466 A CN106680466 A CN 106680466A
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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
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Abstract
The invention relates to a device for simulating soil groundwater oxygen content gradient distribution under a hydrostatic condition and can provide a simulated environment for related experiments and projects of researching pollutant transportation, reaction and control in different oxygen content conditions caused by groundwater body layering. The device comprises a rainfall device, a test earth pillar and an anaerobic water supply device, wherein the rainfall device comprises a water tank, a water inlet pump, a flow valve, a shower head and a connection pipeline, and the flow valve can be adjusted to control rainfall intensity; the test earth pillar comprises a plurality of detachable assembled assemblies of the same specification, each assembly is formed by assembling two half-cylinder tubes, the inside of the assembly is dull polished, and a series of holes are formed in the lateral edge to be connected with a sampling device; the anaerobic water supply device comprises an improved Mariotte bottle, a connection pipe with a valve and a connection disk with a permeable stone inner core. When the device is utilized, the transportation and reaction situation of pollutant in an aerobic, anaerobic and oxygen-deficient environment generated by an uneven water-gas distribution condition of an unsaturated-saturated zone can be taken into consideration and researched. Meanwhile, the device is suitable for simulation experiments of different lengths by assembling and disassembling different amount of models, so that the using rate of the models is improved, and cost is reduced.
Description
Technical field
The present invention relates to one kind contaminant transportation reaction in soil and subsoil water unsaturation-saturated zone under water statical condition
Conversion test analog, especially considers that pollutant are ground during vertical transfer by subsoil water oxygen content Different Effects
Study carefully.
Technical background
With the rapid propulsion of the industrialization of the country, economic sustainable development, environmental pollution is also on the rise, especially water money
Source environmental problem is more projected, and the severe contamination and shortage along with surface water resources, underground water pollution is also increasingly serious.And ground
Lower water is located at the invisibility below earth's surface, and the complexity of underground environment due to it, it is difficult to by soil-ground water regime
Itself is repaired, once contaminated post-processing difficulty is huge.Therefore transport reaction of the research pollutant in soil and groundwater is advised
Rule and its influence factor are particularly significant, it will help prediction and evaluation underground water pollution degree, and to control rehabilitating soil and ground
Lower water pollution provides scientific basis.
Vertical soil-column test model is the important means for studying contaminant transportation in soil and groundwater both at home and abroad, and application should
Model is very directly perceived in Study of The Underground water pollutant transport reaction rule, is to disclose pollutant and migrate in ground water regime to turn
Change the good approach of mechanism.At present, the vertical soil-column test model used by laboratory is relatively simple, single function, specifically exists
Problems with：
1st, the effect of rainfall is ignored.Because rainfall infiltration is the important source of the recharge of ground water, in this course in subsoil water
The various ingredients change such as increase of subsoil water oxygen content, with rainwater is infiltrated in soil, oxygen contains pollutant in soil aperture
Reduction of amount etc., and conventional model cannot effectively change rainfall intensity.
2nd, ignore body of groundwater increases oxygen different distributions problem with depth.Due to water-gas in unsaturation-saturated zone
Skewness situation, resulting aerobic, anaerobism, anaerobic environment, the subsoil water of different oxygen contents, pollutant are wherein
Course of reaction it is completely different.Dissolved oxygen is important electron acceptor, for example in the presence of oxygen, NH4 +Ion first exists
NO is oxidized under specific bacteria effect-；Under anaerobic environment, NO-Then by many antibacterials as breathing electron acceptor.
Therefore, oxygen concentration directly affects the direction that N occurs conversion.
3rd, functional module does not have subsequent upgrade space.With going deep into for research, model function and parameter need constantly to adjust
It is whole, but the follow-up improvement of the typically no consideration of existing model, it is impossible to adapt to the test of different length or depth, recycling rate of waterused
It is low.
The content of the invention
The present invention is a kind of device of water statical condition Imitating soil subsoil water oxygen content Gradient distribution, is overcome above-mentioned
Deficiency in existing apparatus technology, the model considers rainfall and oxygen content factor, and structure is simpler, reasonable in design, systematic error
It is little, convenient and high recycling rate is sampled, it is easy to scientific research and promotes the use of.
A kind of device of water statical condition Imitating soil subsoil water oxygen content Gradient distribution proposed by the present invention, including drop
Rain device 1, test earth pillar 2 and anaerobic water feeder 3, the rainer 1 can adjust flow valve control rainfall intensity, bag
Water tank 11, connecting pipe 12, intake pump 13, flow valve 14 and shower nozzle 15 are included, water tank 11 passes through connecting pipe 12, intake pump 13
Connect shower nozzle 15 with flow valve 14；The test earth pillar 2 includes, each component assembled by the component 21 of some same specifications
21 are formed by connecting by two semicolumn tubing by ring flange with holes 22 and aperture sides fixed block 23, are adopted inside semicolumn tubing
Processed with frosted, side is provided with some thief holes, for connecting syringe type sampler 24；The anaerobic water feeder 3
It is made up of geneva bottle 4, the terminal pad 5 with valve connecting tube 46 and with permeable stone inner core, the bottom of geneva bottle 4 is by band valve connection
The terminal pad 5 of the connect band permeable stone inner core of pipe 46, the terminal pad 5 with permeable stone inner core is located at test earth pillar 2 bottom, described
Shower nozzle 15 is located at the top of test earth pillar 2.
In the present invention, the internal diameter of the component 21 is 150-160mm, and external diameter is 160-170mm, is highly 200mm, inwall mill
Sand process eliminates current short circuit；The internal diameter of the ring flange 22 is 150-160mm, and external diameter is 190-200mm, and thickness is 10mm；Institute
State the length and width of aperture sides fixed block 23 and be 10-15mm, thickness is 5mm, positioned at range semicircle column jecket material top and bottom 80mm
Place, is each provided with 2；The ring flange 22 is circumferentially opened and uniformly opens 8 holes, and with the opening diameter of side fixed block 23 3- is
5 mm, are adapted to the bolt of respective diameters；The thief hole airtight connection syringe type sampler 24, in face of cylinder component 21
At one semicolumn tubing face horizontal 1/3, vertical direction is arranged every 65mm, to sample for follow-up test analysis.
In the present invention, the improved geneva bottle 4 by glass tubing 41, rubber stopper 42, the Nanoscale Iron adding tube 43 with valve,
Water inlet pipe 44, bottom with valve densification screen membrane 45 is constituted；The geneva bottle is connected by band valve pipe 46 with earth pillar bottom
Connect device 5 to connect, the anaerobic water of the simulation deep phreatic water anaerobic environment to supply differing heights in test earth pillar.
In the present invention, the sidepiece of geneva bottle 4 is connected with the Nanoscale Iron adding tube 43 with valve, can add in geneva bottle 4
Deoxidant, the bottom of geneva bottle 4 is provided with filter screen 45, can be added in geneva bottle 4 by the Nanoscale Iron adding tube 43 with valve
Deoxidant, the Fe (OH) of formation3Stopped by filter screen 45.
In the present invention, the terminal pad 5 is formed by stacking by two-layer cylindrical tube 51, the flanged disk of Upper cylindrical pipe 51, upper strata
Inlay in cylindrical tube 51 and place in permeable stone 52, lower floor's cylindrical tube 51 bead 53, the bottom of lower floor's cylindrical tube 51 connection water inlet pipe
46, the bottom of lower floor's cylindrical tube 51 is provided with band valve outlet pipe 54, more uniform, hydraulic property when to make current enter earth pillar
More preferably.
In the present invention, the internal diameter of cylindrical tube 51 in the terminal pad 5 is 150-160mm, and external diameter is 160-170mm, height
For 40-60mm；The ring flange internal diameter is 150-160mm, and external diameter is 190-200mm, and thickness is 10mm, circumferentially opens uniform
8 holes are opened, opening diameter is 3-5 mm, is adapted to the bolt of respective diameters, is bolted to connection with top earth pillar；It is built-in
20-30mm thickness permeable stones 52, the glass bead layer 53 after 20-30mm, bottom water inlet pipe 46 internal diameter aperture 50-60mm, external diameter 55-
65mm, the internal diameter aperture of bottom outlet pipe 54 is 20-30mm, and external diameter is 25-35mm, and pipe range is 30-40mm.
Beneficial effects of the present invention：
1st, the present invention provides the dewatering device that can change raininess such that it is able to which research passes through Rainfall Recharge process
The various ingredients change such as increase of subsoil water oxygen content in middle subsoil water, pollutant are entered in soil with rainwater is infiltrated, soil hole
Impact of the reduction of oxygen content etc. to underground water pollutant transport reaction in gap.
2nd, device does not consider that body of groundwater increases oxygen distribution gradient with depth before solving the problems, such as.By improving
Geneva bottle with to test earth pillar in supply differing heights simulation deep phreatic water anaerobic environment anaerobic water.Lower floor's anaerobic water
Mix with the water full of oxygen of upper strata rainfall infiltration, so as to be formed with the groundwater occurrence of oxygen gradient in vertical direction.
Experiment dress is provided for oxygen content in simulation soil-ground water regime related from now on as the related experiment of the material impact factor
Put reference.
3rd, there is great motility and operability in sampling.There is connection syringe type sampler earth pillar side,
It is easy to that experiment water sample is observed and is gathered；Simultaneously thief hole can transform the point source pollutant inlet of different depth as, grind
Study carefully the impact of different depth pollutant injection；Additionally, after experiment terminates, by disassembling to the horizontal and vertical of model, can use
Each position soil sample carries out assay, more conducively accurate assurance pollutant spread condition and the absorption situation in soil.
4th, earth pillar component has offer standard component, the length models for meeting different requirements can be assembled by combination, greatly
The recycling rate of waterused of single component is improved, can be produced in batches, be easy to large-scale promotion.
Description of the drawings
Fig. 1 is general structure schematic diagram of the present invention；
Fig. 2 is earth pillar component cylinder tubing schematic diagram of the present invention；
Label in figure：1 is rainer, and 11 is water tank, and 12 is connecting pipe, and 13 is intake pump, and 14 is flow valve, and 15 is the seedpod of the lotus
Head, 2 are test earth pillar, 21 cylinder tubes, and 22 is ring flange, and 23 is side contiguous block, and 24 is syringe sampling device, 3
For anaerobic water feeder, 4 is improved geneva bottle, and 41 is glass tubing, and 42 is rubber stopper, and 43 is the addition of the Nanoscale Iron with valve
Pipe, 44 is band valve water inlet pipe, and 45 is filtering net film, and 46 is band valve connecting pipe, and 5 is terminal pad, the circle of 51 flanged disks
Column jecket, 52 is permeable stone, and 53 is bead, and 54 is band valve outlet conduit.
Specific embodiment
Accompanying drawing is combined below by embodiment further illustrate the present invention.
L embodiments 1：As shown in figure 1, with the annexation between each part of explanatory note, supplementing
L is as shown in Fig. 2 with the annexation between each part of explanatory note, supplement
Embodiment 2：Using the device described in embodiment 1, nitrate transfer conversion test is carried out.
1st, standby soil：Sampled away from earth's surface 10 ~ 15m depth.It is indoor in experiment, middle sand is air-dried, Jing 2mm
Screened, determined unit weight, porosity, nitrate nitrogen content, nitrite nitrogen content, ammonia-nitrogen content, the content of organic matter, PH.
2nd, assemble：Rainer 1 and anaerobic water feeder 3 are connected, the various pieces of test earth pillar are passed through into bolt
In ring flange 22, side contiguous block 23 splices, and earth pillar splices with terminal pad, and the valve of all pipelines is remained turned-off.
3rd, banket：Soil after sieve is carried out into layering filling, and is slightly tamped, it is ensured that current can be real in earth pillar
Now lift the homogeneity with Soil structure.
4th, anaerobic water is injected：The glass tubing 41 of adjustment geneva screen 4 opens the valve of water injection pipe 44, inward to proper height
Face is filled with nitrogen 5 minutes, is subsequently charged with and processed not oxygenous water body until the water of geneva bottle 4 is expired；Close the valve of water injection pipe 44
Door, the valve of opening conduits 46 waits level stability in earth pillar silently, closes the valve of connecting pipe 46；Beat in this process
Output the valve of waterpipe 54 and survey content of oxygen dissolved in water under air-proof condition, Nanoscale Iron oxygen scavenger is opened if oxygen is detected
43 valves, urgent removal oxygen is zero up to oxygen content is detected, and is then turned off the valve of Nanoscale Iron adding tube 43, outlet 54
The level stabilities such as place's valve, continuation, close the valve of connecting pipe 46.
5th, rainfall：Certain raininess is controlled, flow valve valve 14 is opened in firm discharge position, intake pump 15 is opened, is started
Rainfall, waits to the top layer soil body and occurs after certain hydrops, putting water pump 15 and flow control valve 14 into immediately.
6th, pollutant injection：After standing 2h, moment injection 2L, 500mg/L potassium nitrate solution, subsequently quiet at the top of earth pillar
Put.
7th, sample：According to experimental program not in the same time, diverse location sampled, with ultraviolet spectrophotometry survey nitre state
Nitrogen, N- (1 naphthyl)-ethylenediamine Spectrophotometric Determination nitrite nitrogen, Nessler's reagent photometer surveys ammoniacal nitrogen, and DO test devices are surveyed
Dissolved oxygen content.
8th, after end to be tested, the valve of outlet conduit 54 is opened, water is vented, model backward is disassembled, you can complete right
Soil sample layering collection after test, and cleaning afterwards, it is convenient to reuse.
Claims (6)
1. a kind of device of water statical condition Imitating soil subsoil water oxygen content Gradient distribution, it is characterised in that including rainfall dress
(1), test earth pillar (2) and anaerobic water feeder (3) are put, it is strong that the rainer (1) can adjust flow valve control rainfall
Degree, including water tank (11), connecting pipe (12), intake pump (13), flow valve (14) and shower nozzle (15), water tank (11) is by even
Adapter road (12), intake pump (13) and flow valve (14) connection shower nozzle (15)；Test earth pillar (2) is included by some with rule
The component (21) of lattice is assembled, and each component (21) is by two semicolumn tubing by ring flange with holes (22) and aperture sides
Fixed block (23) is formed by connecting, and semicolumn tubing inside is processed using frosted, and side is provided with some thief holes, for connecting injection
Device formula sampler (24)；The anaerobic water feeder (3) is by geneva bottle (4), band valve connecting tube (46) and band permeable stone
Terminal pad (5) composition of inner core, geneva bottle (4) bottom passes through the terminal pad with valve connecting tube (46) connect band permeable stone inner core
(5), the terminal pad with permeable stone inner core (5) positioned at test earth pillar (2) bottom, the shower nozzle (15) positioned at test earth pillar
(2) top.
2. a kind of device of water statical condition Imitating soil subsoil water oxygen content Gradient distribution according to claim 1, its
It is characterised by that the component (21) internal diameter is 150-160mm, external diameter is 160-170mm, is highly 200mm, inwall frosted is processed
Eliminate current short circuit；Ring flange (22) internal diameter is 150-160mm, and external diameter is 190-200mm, and thickness is 10mm；It is described to open
Hole side fixed block (23) length and width are 10-15mm, and thickness is 5mm, at range semicircle column jecket material top and bottom 80mm,
It is each provided with 2；The ring flange (22) is circumferentially opened and uniformly opens 8 holes, is with side fixed block (23) opening diameter
3-5 mm, are adapted to the bolt of respective diameters；The thief hole airtight connection syringe type sampler (24), in face of cylinder component
(21) at a semicolumn tubing face horizontal 1/3, vertical direction is arranged every 65mm, to sample for follow-up test point
Analysis.
3. a kind of device of water statical condition Imitating soil subsoil water oxygen content Gradient distribution according to claim 1, its
Be characterised by the improved geneva bottle (4) by glass tubing (41), rubber stopper (42), the Nanoscale Iron adding tube (43) with valve,
Water inlet pipe with valve (44) and bottom densification screen membrane (45) composition；The geneva bottle is by band valve pipe (46) and earth pillar
Base connector (45) connects, the anaerobic of the simulation deep phreatic water anaerobic environment to supply differing heights in test earth pillar
Water.
4. a kind of device of water statical condition Imitating soil subsoil water oxygen content Gradient distribution according to claim 1, its
It is characterised by that geneva bottle (4) sidepiece is connected with the Nanoscale Iron adding tube (43) with valve, can adds in geneva bottle (4) and deoxygenate
Agent, geneva bottle (4) bottom is provided with filter screen (45), can be added in geneva bottle 4 by the Nanoscale Iron adding tube (43) with valve
Enter deoxidant, the Fe (OH) of formation3Stopped by filter screen (45).
5. a kind of device of water statical condition Imitating soil subsoil water oxygen content Gradient distribution according to claim 1, its
It is characterised by that the terminal pad (5) is formed by stacking by two-layer cylindrical tube (51), the flanged disk of Upper cylindrical pipe (51), upper strata cylinder
Inlay in pipe (51) and place in permeable stone (52), lower floor's cylindrical tube (51) bead (53), the connection of lower floor's cylindrical tube (51) bottom
Water inlet pipe (46), lower floor's cylindrical tube (51) bottom be provided with band valve outlet pipe (54), to make current enter earth pillar when more
Uniformly, hydraulic property is more preferable.
6. a kind of device of water statical condition Imitating soil subsoil water oxygen content Gradient distribution according to claim 5, its
It is characterised by that the internal diameter of cylindrical tube 51 in the terminal pad (5) is 150-160mm, external diameter is 160-170mm, is highly 40-
60mm；The ring flange internal diameter is 15-160mm, and external diameter is 190-200mm, and thickness is 10mm, circumferentially opens and uniformly open 8
Hole, opening diameter is 3-5 mm, is adapted to the bolt of respective diameters, is bolted to connection with top earth pillar；Built-in 20-30mm
Thick permeable stone 52,20-30mm thick glass bead layer (53), bottom water inlet pipe (46) internal diameter aperture 50-60mm, external diameter 55-65mm,
Bottom outlet pipe (54) internal diameter aperture is 20-30mm, and external diameter is 25-35mm, and pipe range is 30-40mm.
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| CN201710065078.5A CN106680466B (en) | 2017-02-06 | 2017-02-06 | A kind of device of water statical condition Imitating soil underground water oxygen content gradient distribution |
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| CN201710065078.5A CN106680466B (en) | 2017-02-06 | 2017-02-06 | A kind of device of water statical condition Imitating soil underground water oxygen content gradient distribution |
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Cited By (23)
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| CN107976527A (en) * | 2017-12-13 | 2018-05-01 | 广东省环境科学研究院 | It is a kind of to simulate the device that soil pollution discharges under different soils environmental condition |
| CN108020652A (en) * | 2017-12-29 | 2018-05-11 | 长江大学 | More rotatable production simulating sand evaluating apparatus of series of strata |
| CN108169102A (en) * | 2018-03-07 | 2018-06-15 | 山东大学 | Initial rainwater pollutant spatial and temporal distributions physical simulating device in the soil and method |
| CN108489870A (en) * | 2018-03-14 | 2018-09-04 | 成都理工大学 | A kind of homogeneous aeration zone simulation test device and method |
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