CN113092339A - Visual micro-channel model for simulating migration process of pollutants in porous medium containing preferential flow - Google Patents
Visual micro-channel model for simulating migration process of pollutants in porous medium containing preferential flow Download PDFInfo
- Publication number
- CN113092339A CN113092339A CN202110385511.XA CN202110385511A CN113092339A CN 113092339 A CN113092339 A CN 113092339A CN 202110385511 A CN202110385511 A CN 202110385511A CN 113092339 A CN113092339 A CN 113092339A
- Authority
- CN
- China
- Prior art keywords
- micro
- channel
- preferential flow
- porous medium
- medium containing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000013508 migration Methods 0.000 claims abstract description 26
- 230000005012 migration Effects 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 15
- 239000010703 silicon Substances 0.000 claims abstract description 15
- 230000000007 visual effect Effects 0.000 claims abstract description 12
- 239000000356 contaminant Substances 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 20
- 231100000719 pollutant Toxicity 0.000 abstract description 18
- 239000002689 soil Substances 0.000 abstract description 8
- 239000011148 porous material Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011521 glass Substances 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005067 remediation Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000003895 groundwater pollution Methods 0.000 abstract 1
- 238000003900 soil pollution Methods 0.000 abstract 1
- 239000002609 medium Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 9
- 238000011161 development Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
本发明涉及土壤和地下水污染修复领域，提供了一种研究环境污染物在含优先流多孔介质内部流动的可视化微观通道模型，包括刻蚀在硅晶片上的入口、入口段、微通道、出口段和出口；微通道内设有多个呈交错排列的微柱，通过设置微柱阵列，可真实的模拟地下环境中含优先流的土壤复杂孔隙结构，微柱高度与微通道深度相同，在硅晶片的顶部设有载玻片，该载玻片与微通道和硅晶片实现密封连接。本发明的有益效果为：模拟污染物孔隙尺度下在含优先流的多孔介质内部的迁移过程，更真实反应污染物在含优先流的多孔介质中的迁移和滞留特性；提高对污染物在含优先流的地下含水多孔介质中去除机理的认识；且该微观通道模型透光性和可视性好，便于数据图像的采集和处理。The invention relates to the field of soil and groundwater pollution remediation, and provides a visual microscopic channel model for studying the flow of environmental pollutants in a porous medium containing preferential flow, including an inlet, an inlet section, a microchannel and an outlet section etched on a silicon wafer There are multiple staggered micropillars in the microchannel. By setting the micropillar array, the complex pore structure of soil with preferential flow in the underground environment can be simulated truly. The height of the micropillars is the same as the depth of the microchannels. The top of the wafer is provided with a glass slide, which is sealed with the microchannel and the silicon wafer. The beneficial effects of the present invention are: simulate the migration process of pollutants in the porous medium containing preferential flow at the pore scale, and more truly reflect the migration and retention characteristics of pollutants in the porous medium containing preferential flow; The understanding of the removal mechanism in the preferential flow underground water-bearing porous medium; and the microscopic channel model has good light transmission and visibility, which is convenient for data image acquisition and processing.
Description
Technical Field
The invention relates to the field of soil and underground water pollution remediation, in particular to a visual micro-channel model for researching the migration process of environmental pollutants in a porous medium containing a preferential flow.
Background
In recent years, with rapid development of economy, people have increasingly demanded water resources, which leads to serious destruction of underground water resources. Once the groundwater is contaminated, no technique exists to thoroughly decontaminate. The development of the migration and removal behaviors of pollutants (such as microorganisms, nanoparticles or nano plastics and the like) in the environment, particularly in an aqueous medium, plays a very important role in accurately predicting the exposure probability of the pollutants and various organisms. Preferential flow refers to the phenomenon of rapid transport of moisture and solutes to deep soil and groundwater along preferential paths, bypassing the matrix. The soil forming the preferential flow mechanism in nature is common, and the occurrence and development process of the preferential flow is very complicated due to the influence of factors such as soil property, structure and the like. Therefore, it is necessary to study the mechanism of contaminant flow and migration within a porous media containing a preferential flow. However, most of the current researches on the migration process of pollutants in the environment are focused on laboratory column experiments, so that the microscopic migration process of pollutants in the porous medium containing the preferential flow cannot be observed in the laboratory column experiments, and the influence of the preferential flow on the migration mechanism of the pollutants cannot be clarified. Chinese patent (CN 107036951A) discloses a micro-channel model for simulating the internal flow of a porous medium, which realizes the visual measurement of the flow details in the micro-channel through simulating the pore structure in the core, but cannot obtain the influence of the preferential flow on the fluid flow in the porous medium. To improve the understanding of the mechanism of contaminant migration within the porous media containing the preferential flow, a suitable visualization microchannel model needs to be selected.
Disclosure of Invention
The invention aims to provide a visual micro-channel model for simulating the migration process of pollutants in a porous medium containing a preferential flow, and the pore structure in the underground water-soil porous medium containing the preferential flow is simulated through different micro-column arrays in a micro-channel; the microcosmic channel model can accurately simulate the migration capacity of pollutants in the porous medium containing the priority flow and the flowing rule of fluid, can clearly observe the microcosmic migration process of the whole pollutants in the porous medium containing the priority flow, can realize visual measurement, is easy to find the migration and retention mechanism of the pollutants in the porous medium containing the priority flow, and has good practicability.
The technical scheme of the invention is as follows:
a visual microchannel model for simulating the migration of contaminants within a porous medium containing a preferential flow, the visual microchannel model comprising: the model comprises an inlet cavity etched on a silicon wafer, an inlet section, a micro-channel, a micro-column array, an outlet section and an outlet cavity, wherein the micro-column array is formed by staggering a plurality of micro-columns, and the height of the micro-column array is the same as the depth of the micro-channel; on top of the silicon wafer a slide is placed which makes a sealed connection with the micro channel and the silicon wafer substrate.
Preferably, the length of the micro-channel is 730-750 microns, the width is 360-380 microns, and the depth of the micro-channel is 10-15 microns; the section of each micro-column is circular, the diameter of the circle is 28-32 microns, and the spacing range of the micro-columns is 5-25 microns. The micro-channel porosity is 40% -49%.
Preferably, the inlet and outlet chambers are identical and circular, have a diameter of 1.2-1.7 mm and a depth equal to the depth of the microchannel.
The invention has the following beneficial effects: through setting up the arrangement mode of microcolumn array in the microchannel, the inside complicated pore structure of underground water and soil medium that simulation contains preferential flow, simultaneously, can also realize the migration of the inside preferential flow of microchannel and the visual measurement of fluid flow details through the slide glass of microchannel model top, provide the guarantee for researcher to find out the migration mechanism of pollutant in the porous medium that contains preferential flow.
Drawings
FIG. 1 is a visualized microchannel model simulating the migration of contaminants within a porous media containing a preferential flow.
Fig. 2 is a schematic structural diagram 1 of an embodiment of a micropillar array.
Fig. 3 is a schematic structural diagram 2 of an embodiment of the micropillar array.
Fig. 4 is a schematic structural diagram 3 of an embodiment of the micropillar array.
Fig. 5 is a confocal microscope photograph corresponding to the schematic structural diagram 1 of the micro-column array embodiment.
Fig. 6 is a confocal microscope photograph corresponding to the schematic structural diagram 2 of the micro-column array embodiment.
Fig. 7 is a confocal microscope photograph corresponding to the schematic structural diagram 3 of the micro-column array embodiment.
In the figure: 1-an inlet chamber; 2-an inlet section; 3-a microchannel; 4-micro-column array; 5-an outlet section; 6-outlet chamber.
Detailed Description
The invention will be further described with reference to the accompanying drawings and two specific embodiments:
FIG. 1 is a visualized microchannel model for simulating the migration of contaminants within a porous medium containing a preferential flow, the model comprising an inlet chamber 1, an inlet section 2, microchannels 3, a microcolumn array 4, an outlet section 5, and an outlet chamber 6 etched in a silicon wafer; the micro-column array 5 is formed by a plurality of micro-columns which are staggered, and the height of the micro-column array is the same as the depth of the micro-channel 4; on top of the silicon wafer a slide is placed which makes a sealed connection with the micro channel and the silicon wafer substrate.
In the microchannel model of the invention, the length of the microchannel 4 is 730-750 micrometers, the width is 360-380 micrometers, and the depth is 10-15 micrometers.
As shown in fig. 2, the microcolumn array 5 is composed of a plurality of microcolumns with circular cross-sections, each microcolumn has a diameter of 30 μm, 20 circular microcolumns are arranged in the channel length direction, and 10 circular microcolumns are arranged in the channel width direction; two rows of circular microcolumns close to the edge of the channel in the length direction of the microchannel 4 are 5 microns away from the channel, the distance between the rest microcolumns is 7 microns, and the height of the microcolumns is the same as the depth of the microchannel 4; the circular microcolumns in the micro-channel model are uniformly distributed.
As shown in fig. 3, the microcolumn array 5 is composed of a plurality of microcolumns with circular cross-sections, each microcolumn has a diameter of 30 μm, 20 circular microcolumns are arranged in the channel length direction, and 10 circular microcolumns are arranged in the channel width direction; and 5 rows of round microcolumns which are close to the edge of the channel in the length direction of the microchannel 4 are 5 micrometers away from the channel; the distance between the middle 5 th and 6 th rows of circular microcolumns is 23 micrometers; the space between every two columns of micro-pillars in the width direction of the micro-channel 4 is 7 micrometers, and the height of the micro-pillars is the same as the depth of the micro-channel 4; the channel with the distance of 23 μm between the middle 5 th and 6 th rows of circular micro-pillars in the micro-channel model can be regarded as a priority flow channel.
As shown in fig. 4, the microcolumn array 5 is composed of a plurality of microcolumns with circular cross-sections, each microcolumn has a diameter of 30 μm, 20 circular microcolumns are arranged in the channel length direction, and 10 circular microcolumns are arranged in the channel width direction; and 3 rows of round microcolumns close to the edge of the channel in the length direction of the microchannel 4 are 5 microns away from the channel; the distance between the middle 4 th, 5 th, 6 th and 7 th rows of circular microcolumns is 5 micrometers; the distance between the 3 rd row and the 4 th row and the distance between the 7 th row and the 8 th row of the circular microcolumns are 14 micrometers respectively; the micro-pillars of each row in the width direction of the micro-channel 4 are arranged at a pitch of 7 micrometers, and the height of the micro-pillars is the same as the depth of the micro-channel 4. In the microchannel model, two channels with a circular microcolumn pitch of 14 μm can be regarded as the preferential flow channel.
As shown in fig. 5, the figure is a confocal microscope photograph corresponding to the schematic structural diagram 1 of the micro-column array embodiment.
As shown in fig. 6, the figure is a confocal microscope photograph corresponding to the schematic structural diagram 2 of the micro-column array embodiment.
As shown in fig. 7, the figure is a confocal microscope photograph corresponding to the schematic structural diagram 3 of the micro-column array embodiment.
The preparation method of the micro-channel model comprises the steps of etching an inlet cavity 1, an inlet section 2, a micro-channel 3, a micro-column array 4, an outlet section 5 and an outlet cavity 6 on a silicon wafer by utilizing a photoetching and ion etching method, then respectively using a through hole with the diameter of 0.5-0.9 mm in the inlet cavity 1 and the outlet cavity 6 as an inlet and an outlet on the back surface of the silicon wafer by utilizing a bulk silicon corrosion method, and finally realizing the sealing of a glass slide and a silicon wafer substrate by utilizing an anode bonding method.
The measuring process of the invention is as follows:
the pollutant solution to be detected is injected into the micro model containing the preferential flow channel through the low-speed peristaltic pump and flows through the micro channels with different micro-column arrays, so that the migration and retention behaviors of the pollutants in the micro-column array gaps containing the preferential flow at different moments and the influence of the preferential flow on the migration process of the pollutants can be observed; and recording the outlet concentration of the pollutants at the outlet position of the micro model with the priority flow channel at different moments to obtain the penetration curve of the pollutants in the micro model with the priority flow channel.
The above embodiments are merely illustrative of the technical idea of the present invention, and any person skilled in the art can modify the above embodiments without departing from the principle and scope of the present invention, and such modifications are also considered to be covered by the protection scope of the present invention.
Claims (5)
1. A visual microchannel model for simulating the migration of contaminants within a porous medium containing a preferential flow, the visual microchannel model comprising: the model comprises an inlet cavity etched on a silicon wafer, an inlet section, a micro-channel, a micro-column array, an outlet section and an outlet cavity, wherein the micro-column array is formed by staggering a plurality of micro-columns, and the height of the micro-column array is the same as the depth of the micro-channel; on top of the silicon wafer a slide is placed which makes a sealed connection with the micro channel and the silicon wafer substrate.
2. The visualized microchannel model for simulating the migration process of contaminants within a porous medium containing a preferential flow according to claim 1, wherein: the length of the micro-channel is 730-.
3. The visualized microchannel model for simulating the migration process of contaminants within a porous medium containing a preferential flow according to claim 1, wherein: the section of each micro-column in the micro-channel is circular, the diameter of the circle is 28-32 microns, and the spacing range of the micro-columns is 5-25 microns.
4. A visual microchannel model for simulating contaminant migration within a porous media containing a preferential flow according to claim 1 or 2, wherein: the depth of the micro-channel is 10-15 microns, and the height of the micro-column is the same as the depth of the micro-channel.
5. The visualized microchannel model for simulating the migration process of contaminants within a porous medium containing a preferential flow according to claim 1, wherein: the inlet cavity and the outlet cavity are the same and circular, the diameter is 1.2-1.7 mm, and the depth of the inlet cavity and the outlet cavity is the same as the depth of the micro-channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110385511.XA CN113092339A (en) | 2021-04-10 | 2021-04-10 | Visual micro-channel model for simulating migration process of pollutants in porous medium containing preferential flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110385511.XA CN113092339A (en) | 2021-04-10 | 2021-04-10 | Visual micro-channel model for simulating migration process of pollutants in porous medium containing preferential flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113092339A true CN113092339A (en) | 2021-07-09 |
Family
ID=76676105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110385511.XA Pending CN113092339A (en) | 2021-04-10 | 2021-04-10 | Visual micro-channel model for simulating migration process of pollutants in porous medium containing preferential flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113092339A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115254213A (en) * | 2022-06-24 | 2022-11-01 | 中国计量大学 | A microfluidic chip device based on real soil pore network |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106334589A (en) * | 2016-10-13 | 2017-01-18 | 中国石油大学(华东) | Micro-fluidic chip simulating organic solvent pollution in underground water system |
| CN106437697A (en) * | 2016-11-03 | 2017-02-22 | 西南石油大学 | Simulate five-spot network micro carve visualization model and apply method |
| CN107036951A (en) * | 2016-12-16 | 2017-08-11 | 清华大学 | A kind of micro-channel model for simulating porous media internal flow |
| CN108238583A (en) * | 2016-12-26 | 2018-07-03 | 中国石油天然气股份有限公司 | Stepped micro-nano-scale channel model and preparation method thereof |
| US20210197197A1 (en) * | 2018-06-06 | 2021-07-01 | Zigzag Biotechnology Ltd. | Laterally-displaced micropost array chip and use thereof |
-
2021
- 2021-04-10 CN CN202110385511.XA patent/CN113092339A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106334589A (en) * | 2016-10-13 | 2017-01-18 | 中国石油大学(华东) | Micro-fluidic chip simulating organic solvent pollution in underground water system |
| CN106437697A (en) * | 2016-11-03 | 2017-02-22 | 西南石油大学 | Simulate five-spot network micro carve visualization model and apply method |
| CN107036951A (en) * | 2016-12-16 | 2017-08-11 | 清华大学 | A kind of micro-channel model for simulating porous media internal flow |
| CN108238583A (en) * | 2016-12-26 | 2018-07-03 | 中国石油天然气股份有限公司 | Stepped micro-nano-scale channel model and preparation method thereof |
| US20210197197A1 (en) * | 2018-06-06 | 2021-07-01 | Zigzag Biotechnology Ltd. | Laterally-displaced micropost array chip and use thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张学羿;窦智;: "黏土微观孔隙结构对可溶性污染物运移的影响", 水文地质工程地质, no. 04, pages 163 - 170 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115254213A (en) * | 2022-06-24 | 2022-11-01 | 中国计量大学 | A microfluidic chip device based on real soil pore network |
| CN115254213B (en) * | 2022-06-24 | 2024-05-03 | 中国计量大学 | A microfluidic chip device based on real soil pore network |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20240253004A1 (en) | Formation of Array of Membranes and Apparatus Therefor | |
| CN100401048C (en) | A multi-channel microfluidic chip and its preparation method | |
| CN110437992B (en) | A large-scale and rapid digital decomposition chip for liquid samples and method of using the same | |
| CN108195647A (en) | It is a kind of simulate oil reservoir miniature model and carry out the method for petroleum driving experiment with it | |
| Kelly et al. | Subsurface to substrate: dual-scale micro/nanofluidic networks for investigating transport anomalies in tight porous media | |
| CN105651574A (en) | Micron-sized capillary tube bundle model for qualitatively analyzing capillary action in porous medium and manufacturing method thereof | |
| CN113092339A (en) | Visual micro-channel model for simulating migration process of pollutants in porous medium containing preferential flow | |
| Yong et al. | Self‐Driving Underwater “Aerofluidics” | |
| CN2831115Y (en) | Multi-channel microflow controlled chip | |
| CN102896006B (en) | Microsphere separation and screening chip and preparation method thereof | |
| CN114011478B (en) | Multifunctional microfluidic chip and manufacturing method thereof | |
| CN106334589B (en) | Microfluidic chip for simulating organic solvent contamination in groundwater systems | |
| CN113713868A (en) | Microfluidic chip and manufacturing method thereof | |
| CN103468569B (en) | Micro fluidic chip system for microalgae toxicity test | |
| CN117448144A (en) | A system and method for simulating microbial migration in contaminated groundwater | |
| CN202330222U (en) | Microfluidic chip for granule and cell fixation | |
| JP3979919B2 (en) | Biopolymer analysis method and apparatus | |
| CN115121304B (en) | A high-throughput particle control system and detection method | |
| Duran et al. | Low-cost gel-filled microwell array device for screening marine microbial consortium | |
| US10926261B1 (en) | Large microfluidic bioreactor and manufacturing method thereof | |
| Wells et al. | DLD Particle Separation Device with Thin Top Membrane | |
| AbdEIFatah et al. | A nanosurface microfluidic device for capture and detection of bacteria | |
| CN212321387U (en) | Calcite petroleum microscopic model and system | |
| Teo et al. | A microfluidic approach to investigate the effects of bacteria deposition in porous media containing randomly packed microbeads via real-time pressure measurement | |
| Peng | Pore-Scale Imbibition Studies for Tight Rock Systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210709 |
|
| WD01 | Invention patent application deemed withdrawn after publication |