CN107631972B - A kind of experimental system that graphene particles are permeated in GCL - Google Patents
A kind of experimental system that graphene particles are permeated in GCL Download PDFInfo
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- CN107631972B CN107631972B CN201710654919.6A CN201710654919A CN107631972B CN 107631972 B CN107631972 B CN 107631972B CN 201710654919 A CN201710654919 A CN 201710654919A CN 107631972 B CN107631972 B CN 107631972B
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Abstract
The present invention relates to a kind of experimental systems that graphene particles are permeated in GCL, it include: permeability apparatus, the closed container of permeability hole (17) is had for a bottom, for holding graphene particles liquid, the permeability apparatus bottom is covered with geosynthetics clay liner GCL (15)；Pressurizing device is connected with the permeability apparatus, for adjusting permeability apparatus internal pressure；Collection device is connect with the permeability hole (17), for collecting the liquid oozed out from permeability apparatus；Temperature regulating device is coated on outside the permeability apparatus, for adjusting the internal temperature of permeability apparatus.Compared with prior art, cutoff performance research of the GCL to graphene under the effects of upper pressure, temperature, graphene initial concentration, ionic strength, content of organics, pH value can be achieved in the present invention, has great importance to the research of graphene cutoff performance.
Description
Technical field
The invention belongs to Environmental Geotechnicals and field of environment engineering, are related to a kind of permeability test system, more particularly, to one kind
The experimental system that graphene particles are permeated in GCL.
Background technique
Graphene by its excellent physicochemical properties and unique texture and be widely used in material, catalysis, absorption,
In the fields such as electronic device, but in its production, transport and application process, inevitably enters rubbish in the form of rubbish and fill out
It buries field and waits disposition.And graphene has extremely strong migration performance in water environment, and has bio-toxicity and environmental hazard,
If graphene enters in ecological environment through refuse landfill GCL, animal, plant, water body and the people in biosphere will be generated
Significant damage.
Currently, for graphene in the soil transfer ability and retention the case where, existing some scholars developed experiment system
System, but existing apparatus focuses on the property research of graphene dispersing solution, and it is initially dense to can not achieve upper pressure, temperature, graphene
GCL studies the cutoff performance of graphene under the effects of degree, ionic strength, content of organics, pH value, therefore, apparatus of the present invention
Exploitation to realize GCL to graphene cutoff performance research have great importance.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of graphene particles to exist
The experimental system permeated in GCL, controllable experimental variable such as GCL pave that thickness, graphene initial concentration, ion are strong in solution
Degree, content of organics, pH value, pressure and temperature etc. study permeance property situation of the graphene dispersing solution in GCL, Jin Erfen
GCL is analysed to the retention retardation capability of graphene.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of experimental system that graphene particles are permeated in GCL, comprising:
Permeability apparatus has the closed container of permeability hole for a bottom, for holding graphene particles liquid, the infiltration
Saturating bottom of device is covered with geosynthetics clay liner GCL；
Pressurizing device is connected with the permeability apparatus, for adjusting permeability apparatus internal pressure；
Collection device is connect with the permeability hole, for collecting the liquid oozed out from permeability apparatus；
Temperature regulating device is coated on outside the permeability apparatus, for adjusting the internal temperature of permeability apparatus.
The permeability apparatus includes sequentially connected top cover, cylindrical drum and pedestal, and the top cover and pressurizing device connect
It connects, permeability hole is set on the pedestal.
The top cover is equipped with the exhaust valve with control switch.
The cap base and cylindrical drum junction is equipped with the first groove, is used for mounting O-shaped sealing ring.
With groove built in annular, bottom surface is covered with stainless steel filtering net, the stainless steel at the cylindrical drum bottom surface edge
The edge of strainer is squeezed built in insertion annular in groove by O-ring seal, and is close to cylindrical drum inner wall, the position GCL
On stainless steel filtering net, the permeability hole is located at below stainless steel filtering net.
The pressurizing device includes air compressor, appendix and pressure regulator valve, and the air compressor passes through gas transmission
It is connect at the top of pipe and permeability apparatus, the pressure regulator valve is arranged on appendix.
The collection device includes that collection funnel, three-legged support and three standing screws, the collection funnel are fixed
It is connect at the top of permeability apparatus bottom, the standing screw with permeability apparatus, bottom is connect with three-legged support, three feet
Bracket and standing screw are used to support permeability apparatus.
The collection funnel bottom has osmos tube.
The temperature regulating device includes circulating water chennel, constant temperature water tank and water pump, and the circulating water chennel is by thin layer shell ring
It is wound on permeability apparatus periphery to be formed, the gap water supply between thin layer shell and permeability apparatus flows through, and the circulating water chennel passes through
Water inlet pipe and return pipe connect to form circulation with constant temperature water tank, and the water pump that cycles through provides power.
The circulating water chennel is organic glass.
Compared with prior art, the invention has the following advantages that
(1) by the parameter of setting inner cavity chamber pressure and graphene particles liquid, inner cavity room temperature is controlled, it can be achieved that top
Rejection of the GCL to graphene under the effects of pressure, temperature, graphene initial concentration, ionic strength, content of organics, pH value
It can study, have great importance to the research of graphene cutoff performance.
(2) cap base and cylindrical drum junction are equipped with the first groove, are used for mounting O-shaped sealing ring, sealing effect is good, mentions
High experiment parameter controls precision.
(3) with groove built in annular, bottom surface is covered with stainless steel filtering net, the edge of stainless steel filtering net at cylindrical drum bottom surface edge
It is squeezed built in insertion annular in groove by O-ring seal, and is close to cylindrical drum inner wall, guarantee percolation effect.
(4) permeability apparatus is supported by tripod and standing screw, and stability is good, is not easy to shake and be deformed, reduces to reality
Test the influence of result.
(5) inner cavity temperature is controlled by external circulating water chennel, contact area is big, and heat-transfer effect is good.
(6) circulating water chennel is organic glass, can observe permeability apparatus internal state, guarantees experiment effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the present embodiment experimental system；
Appended drawing reference:
1 is screw thread；2 be nut；3 be top cover；4 be standing screw；5 be collection funnel；6 be three-legged support；7 be air pressure
Contracting machine；8 be appendix；9 be the first groove；10 be pressure regulator valve；11 be cylindrical drum；12 be the outer wall of circulating water chennel, and 13 be circulation
Sink；14 be pedestal；15 be GCL；16 be stainless steel filtering net；17 be permeability hole；18 be groove built in annular；19 be leaky pipe；
20 be exhaust valve；21 be control switch；22 be water inlet pipe；23 be return pipe；24 be constant temperature water tank；25 be water pump；26 be inner cavity
Room.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment
As shown in Figure 1, a kind of experimental provision that graphene particles are permeated in GCL includes pressurizing device, permeability apparatus, receipts
Acquisition means and temperature regulating device, four constitute a system, realize research of the GCL to graphene rejection effect under different condition,
Variable includes the factors such as GCL thickness, ionic strength, temperature, pressure, content of organics, pH value and graphene concentration.
Permeability apparatus includes top cover 3, cylindrical drum 11 and pedestal 14.Top cover 3 is made by stainless steel, upper part and exhaust valve 20
With 10 airtight connection of pressure regulator valve with control switch；Pressure regulator valve 10 can show and adjust permeability apparatus internal pressure；Under top cover 3
The first groove 9 is arranged in portion, to dispose O-ring to guarantee device air-tightness.Cylindrical drum 11 is made of organic glass；The setting of its lower end
There is the internal screw thread airtight connection of external screw thread and pedestal 14.Pedestal 14 is made of stainless steel, close by screw thread and circulating water chennel 13
Connection is closed, and forms inner cavity chamber 26 with 11 airtight connection of cylindrical drum；Stainless steel filtering net 16 is spread in 14 bottom of pedestal, uses O-ring
Stainless steel filtering net 16 is squeezed into groove 18 built in insertion annular；Bottom protrusion part is uniformly arranged diameter 2mm in pedestal 14 simultaneously
The permeability hole 17 of left and right.
Pressurizing device includes air compressor 7, appendix 8 and pressure regulator valve 10.Air compressor 7 has control switch 21,
Work will be automatically stopped when pressure reaches the upper limit；Appendix 8 and 10 airtight connection of pressure regulator valve with control switch.
Collection device is by including 5, three foot supports 6 of collection funnel and standing screw 4.Collection funnel 5 is made of stainless steel,
Bottom setting leaky pipe 19 simultaneously welds three-legged support 6, to support experiment upper unit；5 top edge of collection funnel welding three
There is screw thread 1 on root standing screw 4,4 top of standing screw, and standing screw 4 and top cover 3 pass through the closed fixation of nut 2.
Temperature regulating device includes constant temperature water tank 24, water pump 25, water inlet pipe 22, return pipe 23 and circulating water chennel 13.Circulating water chennel
13 are made of thin layer organic glass, and lower end setting external screw thread and 14 upper internal threaded airtight connection of pedestal, circulating water chennel 13 exist
Lower end and upper end airtight connection corresponding with water inlet pipe 22, return pipe 23 respectively, circulating water chennel bottom, which is laid with, needs thickness
GCL15.Constant temperature water tank 24 keeps its interior water temperature to maintain to stablize, and the water of 24 fixed temperature of constant temperature water tank is passed through water inlet pipe by water pump 25
22 are transported to the bottom of circulating water chennel 13, and the water in circulating water chennel 13 flows back into 24 heating/cooling of constant temperature water tank through return pipe 23
And circulating water chennel 13 is gone successively to, with this, to realize, temperature is constant in permeability apparatus.
By the present apparatus, bottom is laid with the GCL of specific thicknesses and complete aquation in permeability apparatus, by ionic strength, temperature
The specific graphene solution of the variables such as degree, content of organics, pH value and graphene concentration, pour into it is closed in permeameter, by adding
Pressure device maintains pressure in permeability apparatus constant, and keeps temperature in permeability apparatus to stablize by temperature regulating device, keeps graphene molten
Liquid infiltration GCL is simultaneously flowed out through bottom stainless steel filtering net, by collection device, is collected the graphene penetrating fluid penetrated and is detected it
Middle graphene concentration, to study under specified conditions GCL to the rejection effect of graphene.
Main experience following steps are analyzed with the present apparatus.
Firstly, simulation osmotic condition, is arranged experimental variable.It is qualitative that a circle is laid in 26 bottom of permeability apparatus inner cavity chamber
Filter paper, and it is laid with the GCL15 of a layer specific thickness and complete aquation on it, and dense according to experimental design configuration particular graphite alkene
Degree, pH value, ionic strength, content of organics graphene dispersing solution, dispersion liquid is poured into inner cavity chamber 26 and is placed in GCL layer
On；Dispersion liquid needs to handle through ultrasonic wave separating apparatus concussion before pouring into, and makes its interior graphene uniform distribution.
Secondly, assembly experiment device, and guarantee air-tightness.Permeability apparatus top cover 3 and pressurizing device 7 are passed through into appendix 8
It is close to connect, the quick coupling of specific dimensions is installed, the also installation pair respectively on permeability apparatus and pressurizing device on appendix
Answer the male connector or female of size quick coupling；Permeability apparatus and thermostat are closely connected by screw thread；By standing screw 4
With nut 2, collection device and permeability apparatus top cover 3 are closely connected；To guarantee air-tightness, in permeability apparatus top cover lower part first
Groove 9 is embedded in O-ring；To guarantee percolation effect, the stainless steel of one layer of 100 mesh is laid at 14 indent position of permeability apparatus pedestal
Stainless steel filtering net is pressed into built in bottom in annular groove 18 by strainer 16 with O-ring, and with epoxy resin by O-ring and infiltration
Saturating device inner wall is into tight bond.
Then, it adjusts pressure and maintains temperature.After assembling instrument and guaranteeing air-tightness, open pressurizing device, be allowed to
Inner cavity chamber 26 continues air inlet, stops air inlet after reaching certain pressure, and adjust air inflow according to pressure regulator valve reading, to maintain
Pressure is stablized；Pressurizing device mainly uses air compressor 7, chamber inner pressure can be made to reach 0.8Mpa by force by ventilation；According to reality
Requirement setting 24 temperature of constant temperature water tank is tested, water in case is made to reach requirement water temperature, passes through the water in constant temperature water tank 24 by water pump 25
It is input into water pipe 22 and is input to 13 bottom of circulating water chennel, while circulating water chennel upper water voluntarily flows back into constant temperature water tank through return pipe 23
24。
Finally, pressure is maintained to stablize, is tested and collect effusion.Graphene dispersing solution is in specific pressure in inner cavity chamber 26
Under power and temperature action, GCL15 is penetrated through bottom percolation hole 17 and flows into collection funnel 5, is received after being flowed out by leaky pipe 19
Collect and is sealed.
Claims (10)
1. a kind of experimental system that graphene particles are permeated in GCL characterized by comprising
Permeability apparatus has the closed container of permeability hole (17) for a bottom, for holding graphene particles liquid, the infiltration
Saturating bottom of device is covered with geosynthetics clay liner GCL (15)；
Pressurizing device is connected with the permeability apparatus, for adjusting permeability apparatus internal pressure；
Collection device is connect with the permeability hole (17), for collecting the liquid oozed out from permeability apparatus；
Temperature regulating device is coated on outside the permeability apparatus, for adjusting the internal temperature of permeability apparatus.
2. the experimental system that a kind of graphene particles according to claim 1 are permeated in GCL, which is characterized in that described
Permeability apparatus include sequentially connected top cover (3), cylindrical drum (11) and pedestal (14), the top cover (3) and pressurizing device
It connects, permeability hole (17) is set on the pedestal (14).
3. the experimental system that a kind of graphene particles according to claim 2 are permeated in GCL, which is characterized in that described
Top cover (3) be equipped with the exhaust valve (20) with control switch.
4. the experimental system that a kind of graphene particles according to claim 2 are permeated in GCL, which is characterized in that described
Top cover (3) bottom and cylindrical drum (11) junction be equipped with the first groove (9), be used for mounting O-shaped sealing ring.
5. the experimental system that a kind of graphene particles according to claim 2 are permeated in GCL, which is characterized in that described
Cylindrical drum (11) bottom surface edge with annular built in groove (18), bottom surface is covered with stainless steel filtering net (16), the stainless steel
The edge of strainer (16) is squeezed built in insertion annular in groove (18) by O-ring seal, and is close to cylindrical drum (11) inner wall,
The GCL (15) is located on stainless steel filtering net (16), and the permeability hole (17) is located at below stainless steel filtering net (16).
6. the experimental system that a kind of graphene particles according to claim 1 are permeated in GCL, which is characterized in that described
Pressurizing device include air compressor (7), appendix (8) and pressure regulator valve (10), the air compressor (7) passes through gas transmission
It is connect at the top of pipe (8) and permeability apparatus, the pressure regulator valve (10) is arranged on appendix (8).
7. the experimental system that a kind of graphene particles according to claim 1 are permeated in GCL, which is characterized in that described
Collection device include collection funnel (5), three-legged support (6) He Sangen standing screw (4), the collection funnel (5) is fixed
In permeability apparatus bottom, it is connect at the top of the standing screw (4) with permeability apparatus, bottom is connect with three-legged support (6), described
Three-legged support (6) and standing screw (4) be used to support permeability apparatus.
8. the experimental system that a kind of graphene particles according to claim 7 are permeated in GCL, which is characterized in that described
Collection funnel (5) bottom have osmos tube (19).
9. the experimental system that a kind of graphene particles according to claim 1 are permeated in GCL, which is characterized in that described
Temperature regulating device include circulating water chennel (13), constant temperature water tank (24) and water pump (25), the circulating water chennel (13) is by thin layer shell
Body is looped around permeability apparatus periphery and is formed, and the gap water supply between thin layer shell and permeability apparatus flows through, the circulating water chennel
(13) formation circulation is connect with constant temperature water tank (24) by water inlet pipe (22) and return pipe (23), described cycles through water pump
(25) power is provided.
10. the experimental system that a kind of graphene particles according to claim 9 are permeated in GCL, which is characterized in that described
Circulating water chennel (13) outer wall material be organic glass.
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| CN109187310A (en) * | 2018-09-28 | 2019-01-11 | 中国科学院武汉岩土力学研究所 | Groundwater seepage and wash away rock analogy method |
| CN110044796A (en) * | 2019-05-15 | 2019-07-23 | 河海大学 | Geotechnical fibre filter performance and multifunctional tester |
| CN111982785A (en) * | 2020-08-31 | 2020-11-24 | 甘肃省建材科研设计院有限责任公司 | Artificial water simulation test device for hydrophobic particles and test method thereof |
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