CN104568709B - Aeration zone soil adsorption parameter tester based on weak adsorption pollutants - Google Patents
Aeration zone soil adsorption parameter tester based on weak adsorption pollutants Download PDFInfo
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Abstract
The invention provides an aeration zone soil adsorption parameter tester based on weak adsorption pollutants. The aeration zone soil adsorption parameter tester at least comprises a sealing cover, an experiment section, a sampling device, a constant water head fixing device, a constant water head water feeding device, a constant water head liquid supplying device and a water supplying and liquid supplying switching device, wherein the experiment section is composed of a soil column, gauze elements, an organic glass plate with holes, a quartz sand filtering layer and a soil column bracket; the sealing cover is mounted at the top of the soil column and is used for sealing the top of the soil column; the sampling device is arranged on the upper part of the soil column; the constant water head water feeding device and the constant water head liquid supplying device are mounted on the constant water head fixing device, and the upper and lower positions of the constant water head water feeding device and the constant water head liquid supplying device can be adjusted; the bottom of the constant water head water supplying device is connected with a water outlet pipe; the bottom of the constant water head liquid supplying device is connected with a liquid outlet pipe; and the water outlet pipe, the liquid outlet pipe and an input pipe are connected with the water supplying and liquid supplying switching device. The device can be used for accurately determining retardation factors and distribution factors of the pollutants with the relatively weak adsorption effect in aeration zone soil; and meanwhile, the method is simple and reliable.
Description
Technical field
The present invention relates to a kind of aerated zone soil adsorbs parametric measurement device, concretely relate to one kind and be based on weakly stable
The aerated zone soil absorption parameter determinator of pollutant.
Background technology
With the fast development of modern age soil physics and computing technology, currently in the quantitative study of solute transfer, more
The more to study and to grasp chemical fertilizer, the pesticide transition process in unsaturated soil using the method for mathematical model.For this reason,
Correctly determine necessary parameter in mathematical model, such as the retardance of solute transfer governing equation convective-diffusion equation because
Son, partition coefficient etc. just become a necessary job.Its pollution to subsoil water, regional water for research chemical fertilizer, pesticide etc.
For the salt characteristics of motion, sewage disposal and reutilization technology, have great importance.
Absorption is the outward manifestation of the physics chemical action in soil between solid phase, liquid phase, and it take part in solute in soil
In migration process, retardation is risen to solute transfer.When solving soil solute transport equation, if solute can be inhaled by soil
Attached, then must be determined by experiment block characteristics RdAnd partition coefficient K in soil-aqueous systems for the soluted.Solute transfer
Block characteristics Rd, i.e. the ratio of flow rate of water flow and solute transfer speed, dimensionless, characterize the ginseng that soil blocks solute migration ability
Number.Partition coefficient K in soil-aqueous systems for the soluted, also known as absorption ratio, refer to reach balance in soil-water two-phase system
During state, concentration proportion in soil with water for the solute, conventional unit is cm3/ g, is description solute absorption behavior in soil
Important physical chemical feature parameter.
In physical chemistry and agrology, common static empirical assay determines aerated zone soil absorption parameter.However, it is big
Quantifier elimination shows, the measurement result of static experiment, substantially more higher than the experimental result under infiltration condition.This is because, static
In experiment, all surfaces of soil particle are all interacted with solution, and under infiltration condition, soil sample does not stir, absorption
Act on the part surface only contacting with solution in granule to carry out.
Content of the invention
The invention provides a kind of aerated zone soil absorption parameter determinator based on weakly stable pollutant, the solution of this device
The problem that prior art exists, can retardation coefficient in aerated zone soil of Accurate Determining less strongly adsorbed contaminating action thing and point
Distribution coefficient, the method is simple and reliable simultaneously.
Realizing the technical scheme that above-mentioned purpose of the present invention adopted is：
A kind of aerated zone soil absorption parameter determinator based on weakly stable pollutant, including closure, experimental section, sampling
Device, determine head fixing device, determine head water supply installation, determine head liquid feed device and water supply feed flow switching device, wherein testing
Section is made up of earth pillar, gauze, poly (methyl methacrylate) plate with holes, quartzy sand filter blanket and earth pillar support, and earth pillar is placed with soil sample for inside
Cylindrical shape Organic glass column, earth pillar support is located at the bottom of earth pillar, and closure is installed on the top of earth pillar and by earth pillar
Top seals；The top that sampler is arranged at earth pillar is used for sampling from earth pillar；Gauze, poly (methyl methacrylate) plate with holes, quartz sand
Filtering layer is respectively positioned in earth pillar, and gauze is provided with upper and lower two-layer, and the lower section of soil sample is from top to bottom followed successively by upper strata gauze, quartz sand
Filtering layer, poly (methyl methacrylate) plate with holes and lower floor's gauze, its at the middle and upper levels gauze contact with soil sample, poly (methyl methacrylate) plate with holes be located at have
At the top 8～12cm of the bottom surface of machine glass column, the bottom surface of Organic glass column is provided with entrance, porch is connected with input
Pipe；Described determine head fixing device by determining head fixed mount and iron rod forms, iron rod is provided with 4 and is vertically installed at and determines head
On fixed mount, determine head water supply installation, determine head liquid feed device and be respectively mounted and determine in head fixing device and both upper bottoms
Put scalable；The bottom determining head water supply installation is connected with outlet pipe, and the bottom determining head liquid feed device is connected with drain pipe, goes out
Water pipe, drain pipe and input pipe are all connected with water supply feed flow switching device, and described water supply feed flow switching device is connected by three
Head, control valve A and control valve B composition, outlet pipe, drain pipe and input pipe are all connected with three way cock, have on outlet pipe
Control valve A, has control valve B on drain pipe；Control valve A is opened, control valve B is closed, and is to earth pillar service position；Control valve A is closed, control
Valve B processed opens, and is to supply liquid status to earth pillar.
Closure is made up of circular poly (methyl methacrylate) plate, silica gel ring and retainer ring, and silica gel ring is fixed on circular lucite
On the bottom surface of plate, and the diameter of silica gel ring is identical with earth pillar internal diameter；Retainer ring is hollow ring poly (methyl methacrylate) plate, retainer ring chlorine
The imitative top sides being fixed on earth pillar are along upper；Retainer ring and circular poly (methyl methacrylate) plate are provided with corresponding 6 screw, will seal
Cover on earth pillar, silica gel ring just buckles in earth pillar, the sealing of earth pillar can be ensured by fixed screw.
Described sampler is made up of copper pagoda and seal head, and copper pagoda is contained at the 5cm of earth pillar top, on seal head
There is the screw thread matching with copper pagoda.
Described head water supply installation of determining is made up of baffle plate, water supply overflow pipe, feed pipe, outlet pipe and interior rotary screw, fixed
Head water supply installation is the cuboid box of the scarce top surface of high 10cm, and the height of baffle plate is 8cm, and baffle plate is vertically fixed on cuboid box
In, entirely determined head water supply installation and be divided into left and right two Room, left room bottom Far Left is provided with apopore, outlet pipe and apopore phase
Even；Left room bottom right is provided with water supply hole, and feed pipe is connected with water supply hole；Right ventricle bottom is provided with spout hole, water supply overflow pipe with
Spout hole is connected；The rear wall determining head water supply installation has two holes passed through for iron rod, can will determine water by screwing interior rotary screw
Head water supply installation is fixed on to be determined on head fixed mount.
Described head liquid feed device of determining is made up of baffle plate, feed flow overflow pipe, feed pipe, drain pipe and interior rotary screw, fixed
Head liquid feed device is the cuboid box of the scarce top surface of high 10cm, and the height of baffle plate is 8cm, and baffle plate is vertically fixed on cuboid box
In, entirely determined head liquid feed device and be divided into left and right two Room, left room bottom Far Left is provided with liquid outlet, drain pipe and liquid outlet phase
Even；Left room bottom right is provided with confession fluid apertures, and feed pipe is connected with confession fluid apertures；Right ventricle bottom is provided with spout hole, feed flow overflow pipe with
Spout hole is connected；The rear wall determining head liquid feed device has two holes passed through for iron rod, can will determine water by screwing interior rotary screw
Head liquid feed device is fixed on to be determined on head fixed mount.
The operation principle that a kind of aerated zone soil based on weakly stable pollutant of the present invention adsorbs parameter determinator is as follows：
When the migration velocity of solute is less than the movement velocity of soil moisture, solute transfer is blocked.In soil
Difference between the movement velocity of moisture and the migration velocity of solute is caused by adsorption by soil solute, generally uses block characteristics
RdTo assess the migration velocity of the solute being blocked：
In formula：RdBlock characteristics for solute transfer in soil；
υwFor the average pore flow velocity of soil moisture, cm/min；
υcFor the average migration velocity of soil solute, cm/min.
By measuring υwAnd υc, you can ask and calculate Rd.Then, partition coefficient K can be calculated using formula (2)d：
In formula：RdFor block characteristics；
ρdFor the dry density of soil, g/cm3；
θ is the volumetric water content of soil, cm3/cm3；
KdFor partition coefficient in soil-aqueous systems for the solute, cm3/g.
The aerated zone soil absorption parameter determinator based on weakly stable pollutant of the present invention compared with prior art has
Following advantage：
(1) analyzer of the present invention is to adsorb parameter by the aerated zone soil that dynamic earth pillar absorption method determines, absorption is made
Carried out with the part surface only contacting with solution in granule, and all surfaces of static adsorptive method soil particle are all and solution
Interaction, the method is compared more accurately and reliably than static adsorptive method.
(2) analyzer of the present invention determine head water supply installation with determine head liquid feed device, by water supply feed flow switching fill
Put flexibly to control and earth pillar is supplied water and feed flow.
(3) the analyzer structure of the present invention is simple, easy to use, is with a wide range of applications.Can be widely applied to wrap
In gas band hydrologic research, contribute to student as instruments used for education and be best understood from weakly stable pollutant aerated zone soil absorption parameter
Principle and its scope of application；And can be used to measure weakly stable pollutant aerated zone soil absorption parameter aborning, it is farmland
Soil improvement provides research parameter, provides research parameter for weakly stable pollutant in the migration of aerated zone soil.
Brief description
Fig. 1 is a kind of absorption parameter determinator structural representation of the aerated zone soil based on weakly stable pollutant.
Fig. 2 is the cap structure schematic diagram of the present invention.
Fig. 3 be the present invention in determine head water supply installation top view.
In figure：1- earth pillar, 2- sampler, 3- closure, 4- gauze, 5- quartz sand filter blanket, 6- poly (methyl methacrylate) plate with holes,
7- three way cock, 8- control valve A, 9- control valve B, 10- determines head liquid feed device, 11- baffle plate, 12- feed flow overflow pipe, and 13- supplies
Liquid pipe, 14- drain pipe, 15- determines head water supply installation, 16- water supply overflow pipe, 17- feed pipe, 18- outlet pipe, and 19- determines head
Fixed mount, 20- entrance, 21- earth pillar support, 22- copper pagoda, 23- seal head, 24- poly (methyl methacrylate) plate, 25- silica gel ring, 26- is solid
Determine ring, 27- screw A, 28- fixed screw, 29- screw B, 30- rear wall, 31- iron rod, rotary screw in 32-, 33- spout hole, 34-
Water supply hole, 35- apopore.
Specific embodiment
With reference to specific embodiment, detailed specific description is done to the present invention, but protection scope of the present invention not office
It is limited to following examples.
A kind of aerated zone soil absorption parameter determinator based on weakly stable pollutant that the present invention provides, its structure is as schemed
Shown in 1.Including closure, experimental section, sampler, determine head fixing device, determine head water supply installation, determine head liquid feed device
With water supply feed flow switching device.Described closure is made up of top cover 3, retainer ring 26 and fixed screw 28, as shown in Figure 2.Close
The top of capping 3 is the circular poly (methyl methacrylate) plate 24 of a diameter of 28cm, and bottom is and tests earth pillar internal diameter same diameter is 20cm
Silica gel ring 25；Retainer ring 26 is internal diameter 22cm, the hollow ring poly (methyl methacrylate) plate of external diameter 28cm, and retainer ring 25 is fixed with chloroform
On earth pillar 1；It is provided with the screw A27 of corresponding 6 0.5cm in retainer ring 26, top cover 3 poly (methyl methacrylate) plate is provided with relatively
The screw B29 of 6 0.5cm answering, screw A27 are mutually corresponding with the position of screw B28；Top cover 3 is covered on earth pillar 1, silica gel
Circle 25 just buckles into the sealing that can ensure earth pillar 1 in earth pillar 1 by fixed screw 28.
Described experimental section is by earth pillar 1, gauze, poly (methyl methacrylate) plate with holes 6, quartzy sand filter blanket 5, earth pillar support 21 and entrance
20 compositions.Earth pillar 1 is the Organic glass column of 120cm wall thickness 1cm for internal diameter, is provided with sampler 2 at earth pillar top；Away from earth pillar
It is provided with poly (methyl methacrylate) plate 6 with holes at the 10cm of bottom, under poly (methyl methacrylate) plate, be stained with gauze 4；Poly (methyl methacrylate) plate 6 with holes is provided with
The thick quartzy sand filter blanket 5 of 5cm；Quartzy sand filter blanket 5, lucite with holes 6, gauze 4 available buffer current；Earth pillar support 21 is four
The poly (methyl methacrylate) plate of high 5cm, is connected with earth pillar 1 bottom by chloroform；It is provided with entrance 20 in earth pillar bottom, can supply water, liquid feeds
In earth pillar.
Described sampler 2 is made up of copper pagoda 22 and seal head 23.Copper pagoda 22 is contained at earth pillar 1 top 5cm,
The screw thread being matched with copper pagoda 22 is had on seal head 23.
Described determine head fixing device by determining head fixed mount 19 and iron rod 31 forms.Determine head fixed mount to be done by angle steel
Become, be provided with 4 iron rods 31 on determining head fixed mount 19.
The described structure determining head water supply installation is as shown in figure 3, by baffle plate 11, water supply overflow pipe 16, feed pipe 17, go out
Water pipe 18, spout hole 33, water supply hole 34, apopore 35 and interior rotary screw 32 form.Determining head water supply installation is lacking of high 10cm
The cuboid box of top surface, in the baffle plate 11 of the high 8cm in middle position determining head water supply installation, is entirely determined head water supply installation and is divided into
Left and right two Room, left room bottom Far Left is provided with apopore 35, and outlet pipe 18 is connected with apopore 35；Left room bottom right is provided with confession
Water hole 34, feed pipe 17 is connected with water supply hole 34；Right ventricle bottom is provided with spout hole 33, water supply overflow pipe 16 and spout hole 33 phase
Even；The rear wall 30 determining head water supply installation has two holes passed through for iron rod 31, can will determine head by screwing interior rotary screw 32
Water supply installation is fixed on to be determined on head fixed mount 19.Described determines the structure of head liquid feed device and determines the knot of head water supply installation
Structure is identical.
Described water supply feed flow switching device is made up of three way cock 7, control valve A8, control valve B9.Drain pipe 14 with go out
Water pipe 18 is connected with earth pillar entrance 20 by three way cock 7；Outlet pipe 18 there is control valve A8, control valve is had on drain pipe
B9；Control valve A8 is opened, control valve B9 is closed, and is to earth pillar service position；Control valve A8 is closed, control valve B9 is opened, and is to earth pillar 1 feed flow
State.
A kind of aerated zone soil based on weakly stable pollutant that the present invention provides adsorbs the job step of parameter determinator
And interpretation is as follows：
First, job step
1st, gather sample
Sample needed for collection experiment, standby；Meanwhile, take undisturbed sample using cutting ring, measure it using drying-weight method and do
Density p 'd.
2nd, prepare sample
Air-dry sample, smash to pieces and sieve (aperture is 2mm aperture), standby.
3rd, moisten sample
Mix one layer of soil container middle berth sieve air-dry after sample, use watering can uniform sprinkling；Then, repave one layer of sample,
Spill one layer of water again, in this approach sample is all moistened, add a cover a vexed night afterwards, outer layer covers a plastic bag again to be prevented from evaporating and make
Moisture redistribution in the sample.
4th, test specimens initial mass moisture content
The sample having moistened fully is mixed, takes a small amount of soil sample to load in the little aluminum box of known quality in different positions,
Do 5 parallel.Put into 105 DEG C of drying 12h in baking oven after weighing weight in the balance and, to constant weight, claim quality after cooling, calculate quality and contain
Water rate θm.
5th, load earth pillar
Dress 5cm quartz sand filter blanket at the 10cm of earth pillar bottom；Stage casing is sample section 100cm, according to diameter D, the length of sample
Degree L and dry density ρ 'd, initial aqueous rate θm, by formula mFilling=[(π R2)/4]·ρ′d·(1+θm) calculate filling quality,
The quality such as segmentation (every layer of 5cm) load earth pillar, interlayer hacking, prevent the formation that interlayer runs off.
6th, saturation earth pillar
Head liquid feed device will be determined and determine head water supply installation and earth pillar lower inlet is connected, open control valve A, close control
Valve B processed, with distilled water progressively saturation earth pillar from bottom to top, to exclude the air in earth pillar, makes earth pillar hole fully satisfy water.7th, drench
Molten experiment
Saturation, after earth pillar constant weight, continues to determine head water supply, after water flow velocity to be distilled is stable, closing control valve A, opens control
Valve B processed, with determine head input now join solute standard working solution (concentration be CEnterG/L), start simultaneously at and collect out flow liquid, input is molten
Matter standard working solution after (input time determines according to type of solutes, sample physical property, percolation flow velocity etc.), opens control for a period of time
Valve A processed, closing control valve B, continue to determine head water supply, use distilled water leaching.Record water supply flow Q.
8th, gather water sample
Timing t at sampleri(i=0,1,2,3 ...) samples, to measure its concentration Ci(i=0,1,2,3 ...), draw
Its breakthrough curve.
9th, dry density and the porosity of sample are measured
After sampling terminates, record experiment end time tn；Then, in earth pillar, take undisturbed sample using cutting ring, using baking
Dry weight method measures its dry density ρdWith porosity n.
10th, measure water sample
Measure the concentration C of solute in water sample using ion meteri.Need water sample or the soil sample of pretreatment, enter again after pretreatment
Row measures.
2nd, Experiment Result arranges
1st, calculate the average pore flow velocity of moisture in earth pillar
Calculated using formula (3)
In formula：υwFor the average pore flow velocity of moisture in earth pillar, cm/min；
V is the average Darcy velocity in earth pillar, cm/min；
N is the porosity of sample in earth pillar, %/%.
2nd, calculate the average migration velocity of pollutant in earth pillar
(1) calculated according to breakthrough curve
1. with relative concentration Ci/CEnterFor vertical coordinate (CiFor solute concentration in water seepage, CEnterFor solute concentration in water leaking-in),
Time of break-through t is abscissa, draws solute concentration breakthrough curve figure.
2. C/C is read on concentration breakthrough curve figureEnterT when=0.50.5Value, as solute penetrate sample in earth pillar when
Between.
3. utilize formula (4) if calculating the average migration velocity of absorption pollutant
υc=L/t0.5(4) in formula：υcIf for the average migration velocity adsorbing pollutant in soil, cm/min；
L is specimen length in earth pillar, cm；
t0.5With relative concentration C/CEnter=0.5 corresponding time, min.
3rd, block characteristics are calculated
υw、υcSubstitution formula (1), you can calculate block characteristics Rd.
4th, calculation of distribution coefficient
Rd、ρd, θ (sample satisfy water when, its moisture content be equal to its porosity n) substitute into formula (2), you can ask and calculate weakly stable
Partition coefficient K in soil-aqueous systems for the pollutantd.
The analyzer structure of the present invention is simple, easy to use, is with a wide range of applications.As can be widely applied to bag gas
In band hydrologic research, contribute to student as instruments used for education and be best understood from the former of weakly stable pollutant aerated zone soil absorption parameter
Reason and its scope of application；And can be used to measure weakly stable pollutant aerated zone soil absorption parameter aborning, it is farmland soil
Earth improvement provides research parameter, provides research parameter for weakly stable pollutant in the migration of aerated zone soil.
Claims (5)
1. a kind of based on weakly stable pollutant aerated zone soil absorption parameter determinator it is characterised in that：Including closure, reality
Test section, sampler, determine head fixing device, determine head water supply installation, determine head liquid feed device and water supply feed flow switching device,
Wherein experimental section is made up of earth pillar, gauze, poly (methyl methacrylate) plate with holes, quartzy sand filter blanket and earth pillar support, and earth pillar is put for inside
Be equipped with the Organic glass column of the cylindrical shape of soil sample, earth pillar support be located at earth pillar bottom, closure be installed on earth pillar top and
Top sealing by earth pillar；The top that sampler is arranged at earth pillar is used for sampling from earth pillar；Gauze, lucite with holes
Plate, quartzy sand filter blanket are respectively positioned in earth pillar, and gauze is provided with upper and lower two-layer, and the lower section of soil sample is from top to bottom followed successively by upper strata yarn
Net, quartzy sand filter blanket, poly (methyl methacrylate) plate with holes and lower floor's gauze, its at the middle and upper levels gauze contact with soil sample, organic glass with holes
Glass plate is located at the top 8～12cm of bottom surface of Organic glass column, and the bottom surface of Organic glass column is provided with entrance, and porch is even
It is connected to input pipe；Described determine head fixing device by determining head fixed mount and iron rod forms, iron rod is provided with 4 and vertically-mounted
On determining head fixed mount, determine head water supply installation, determine head liquid feed device and be mounted on determining in head fixing device and both
Upper-lower position scalable；The bottom determining head water supply installation is connected with outlet pipe, and the bottom determining head liquid feed device is connected with
Drain pipe, outlet pipe, drain pipe and input pipe are all connected with water supply feed flow switching device, described water supply feed flow switching device
It is made up of three way cock, control valve A and control valve B, outlet pipe, drain pipe and input pipe are all connected with three way cock, going out
Control valve A is had on water pipe, control valve B is had on drain pipe；Control valve A is opened, control valve B is closed, and is to earth pillar service position；Control
Valve A closes, control valve B is opened, and is to supply liquid status to earth pillar.
2. the aerated zone soil absorption parameter determinator based on weakly stable pollutant according to claim 1, its feature exists
In：Closure is made up of circular poly (methyl methacrylate) plate, silica gel ring and retainer ring, and silica gel ring is fixed on the bottom of circular poly (methyl methacrylate) plate
On face, and the diameter of silica gel ring is identical with earth pillar internal diameter；Retainer ring is hollow ring poly (methyl methacrylate) plate, and retainer ring chloroform is fixed
On the top sides edge of earth pillar；Retainer ring and circular poly (methyl methacrylate) plate are provided with corresponding 6 screw, closure is covered
On earth pillar, silica gel ring just buckles in earth pillar, can ensure the sealing of earth pillar by fixed screw.
3. the aerated zone soil absorption parameter determinator based on weakly stable pollutant according to claim 1, its feature exists
In：Described sampler is made up of copper pagoda and seal head, and copper pagoda is contained at the 5cm of earth pillar top, seal head has with
The screw thread that copper pagoda matches.
4. the aerated zone soil absorption parameter determinator based on weakly stable pollutant according to claim 1, its feature exists
In：Described head water supply installation of determining is made up of baffle plate, water supply overflow pipe, feed pipe, outlet pipe and interior rotary screw, determines head and supplies
Water installations are the cuboid box of the scarce top surface of high 10cm, and the height of baffle plate is 8cm, and baffle plate is vertically fixed in cuboid box, will
Entirely determine head water supply installation and be divided into left and right two Room, left room bottom Far Left is provided with apopore, and outlet pipe is connected with apopore；Left
Room bottom right is provided with water supply hole, and feed pipe is connected with water supply hole；Right ventricle bottom is provided with spout hole, water supply overflow pipe and spout hole
It is connected；The rear wall determining head water supply installation has two holes passed through for iron rod, can be supplied water determining head by screwing interior rotary screw
Device is fixed on to be determined on head fixed mount.
5. the aerated zone soil absorption parameter determinator based on weakly stable pollutant according to claim 1, its feature exists
In：Described head liquid feed device of determining is made up of baffle plate, feed flow overflow pipe, feed pipe, drain pipe and interior rotary screw, determines head and supplies
Liquid device is the cuboid box of the scarce top surface of high 10cm, and the height of baffle plate is 8cm, and baffle plate is vertically fixed in cuboid box, will
Entirely determine head liquid feed device and be divided into left and right two Room, left room bottom Far Left is provided with liquid outlet, and drain pipe is connected with liquid outlet；Left
Room bottom right is provided with confession fluid apertures, and feed pipe is connected with confession fluid apertures；Right ventricle bottom is provided with spout hole, feed flow overflow pipe and spout hole
It is connected；The rear wall determining head liquid feed device has two holes passed through for iron rod, can will determine head feed flow by screwing interior rotary screw
Device is fixed on to be determined on head fixed mount.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510047647.4A CN104568709B (en) | 2015-01-29 | 2015-01-29 | Aeration zone soil adsorption parameter tester based on weak adsorption pollutants |
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| CN201510047647.4A CN104568709B (en) | 2015-01-29 | 2015-01-29 | Aeration zone soil adsorption parameter tester based on weak adsorption pollutants |
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| CN104568709B true CN104568709B (en) | 2017-02-22 |
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| CN107986555A (en) * | 2017-11-14 | 2018-05-04 | 中电建水环境治理技术有限公司 | Ground water circulation restorative procedure and system based on function pipe network |
| CN110850058B (en) * | 2019-11-18 | 2023-11-14 | 长安大学 | Leaching test device and application method thereof |
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| JP4217953B2 (en) * | 2003-02-03 | 2009-02-04 | 清水建設株式会社 | Test method for poorly water-permeable soil materials |
| JP4840812B2 (en) * | 2006-08-21 | 2011-12-21 | 国立大学法人 香川大学 | Permeability tester and method |
| JP4587054B2 (en) * | 2008-01-29 | 2010-11-24 | 清水建設株式会社 | Test method for poorly water-permeable soil materials |
| CN101344515B (en) * | 2008-08-29 | 2011-10-05 | 成都理工大学 | Permeability coefficient determinator |
| CN102519856B (en) * | 2011-12-19 | 2013-06-26 | 中国地质大学（武汉） | Apparatus for layered undisturbed soil seepage experiment |
| CN102636630A (en) * | 2012-03-29 | 2012-08-15 | 中国地质大学（武汉） | Large unsaturated seepage physical simulator for soil in aerated zone |
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