CN112661289A - Method for monitoring and preventing groundwater pollution - Google Patents
Method for monitoring and preventing groundwater pollution Download PDFInfo
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- CN112661289A CN112661289A CN202011611674.7A CN202011611674A CN112661289A CN 112661289 A CN112661289 A CN 112661289A CN 202011611674 A CN202011611674 A CN 202011611674A CN 112661289 A CN112661289 A CN 112661289A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
- 238000003895 groundwater pollution Methods 0.000 title claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 96
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 239000003673 groundwater Substances 0.000 claims abstract description 28
- 238000005067 remediation Methods 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 230000000903 blocking effect Effects 0.000 claims abstract description 9
- 238000005065 mining Methods 0.000 claims abstract description 8
- 238000005070 sampling Methods 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 24
- 229910001385 heavy metal Inorganic materials 0.000 claims description 19
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 13
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims description 10
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000292 calcium oxide Substances 0.000 claims description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 10
- 229920002678 cellulose Polymers 0.000 claims description 10
- 239000001913 cellulose Substances 0.000 claims description 10
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 10
- 239000004021 humic acid Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 229910021389 graphene Inorganic materials 0.000 claims description 7
- 229920001661 Chitosan Polymers 0.000 claims description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 5
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 5
- 239000010433 feldspar Substances 0.000 claims description 5
- 229940072033 potash Drugs 0.000 claims description 5
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 5
- 235000015320 potassium carbonate Nutrition 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 3
- 238000001223 reverse osmosis Methods 0.000 claims description 3
- 238000003911 water pollution Methods 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 229910052785 arsenic Inorganic materials 0.000 description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000382 dechlorinating effect Effects 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000271 synthetic detergent Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a method for monitoring and controlling underground water pollution, which comprises the following steps: (1) setting a plurality of detection points in the range of a mining area, detecting an underground water source, recording a water source area with heavy pollution and establishing an underground well; (2) sampling underground water through an underground well, detecting, analyzing and comparing, and analyzing the pollution condition of the underground water; (3) determining a pollution source as a field to be prevented and controlled according to the pollution condition; (4) blocking a field to be controlled by a water blocking device, and then adding a groundwater remediation agent into the field to be controlled; and a filter wall is arranged at the downstream of the underground water source. Aiming at monitoring and preventing the pollution of underground water, the method is less influenced by the terrain, and the prevention range can cover the whole monitoring area and the underground depth; the invention can detect the pollution source, effectively treat the pollution source and prevent the pollution source by adopting the filter wall.
Description
Technical Field
The invention relates to the technical field of groundwater treatment, in particular to a method for monitoring and controlling groundwater pollution.
Background
Groundwater refers to water present in the interstices of rocks below ground level and in the narrower sense to water in saturated aquifers below the surface of the groundwater. The groundwater is an important component of water resources, and is one of important water sources for agricultural irrigation, industrial and mining and cities due to stable water quantity and good water quality. With the rapid development of national economy and industry in China, the problem of environmental pollution is increasingly highlighted, and toxic and harmful pollutants enter an underground environment system through various ways to cause underground water pollution.
The water pollution caused by mining is an environmental problem commonly existing in mines, the mining and production activities of the mines are the same as other production activities, and various wastes need to be discharged, and due to unreasonable discharge and stockpiling of the wastes, the water environment in a mining area and around the mining area is damaged to different degrees. The pollution of mines to underground water brings long-term damage to local environment, the daily life health of surrounding residents is greatly influenced, a local natural ecosystem is damaged, and the traditional underground water treatment method needs to invest huge early-stage cost and brings great economic burden to a constructor.
Therefore, the research on a method which is low in cost and can effectively monitor and control the groundwater pollution source is an urgent problem to be solved by the technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention provides a method for monitoring and preventing groundwater pollution, which is low in cost and capable of effectively monitoring and preventing groundwater pollution sources.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for monitoring and controlling groundwater pollution comprising the steps of:
(1) setting a plurality of detection points in the range of a mining area, detecting an underground water source, recording a water source area with heavy pollution and establishing an underground well;
(2) sampling underground water through an underground well, detecting, analyzing and comparing, and analyzing the pollution condition of the underground water;
(3) determining a pollution source as a field to be prevented and controlled according to the pollution condition;
(4) blocking a field to be controlled by a water blocking device, and then adding a groundwater remediation agent into the field to be controlled; and a filter wall is arranged at the downstream of the underground water source.
The invention has the beneficial effects that: aiming at monitoring and preventing the pollution of underground water, the method is less influenced by the terrain, and the prevention range can cover the whole monitoring area and the underground depth; the invention can detect the pollution source, effectively treat the pollution source and prevent the pollution source by adopting the filter wall.
Preferably, in the step (1), the setting density of the detection points is 6-7km2。
Preferably, in the step (1), the detection device adopts a water quality sensor, a water level sensor, a heavy metal detection sensor and a pH value sensor.
Preferably, the detection items in the step (1) and the step (2) are water quality, water level, heavy metal content and pH value.
Preferably, in step (4), the water retaining device is a cement board or a geomembrane.
Preferably, the exterior of the filter wall is sealed by a reverse osmosis membrane, and the filter wall is filled with nano manganese dioxide, graphene oxide and active carbon, wherein the mass ratio of the nano manganese dioxide to the graphene oxide to the active carbon is (5-6) to (2-3) to (1-2).
The strengthening effect of removing heavy metals in the filtering process by adopting nano manganese dioxide is achieved; the graphene oxide can adsorb pollutants in water; the active carbon can be used for decoloring, deodorizing, dechlorinating, removing organic matters and heavy metals, and removing pollutants such as synthetic detergents, bacteria, viruses, radioactivity and the like in water treatment.
Preferably, in the step (4), the groundwater remediation agent comprises the following raw materials in parts by weight: 25-30 parts of potassium feldspar, 15-25 parts of calcium oxide, 5-7 parts of cellulose, 12-18 parts of humic acid, 15-18 parts of activated carbon, 3-5 parts of montmorillonite clay, 6-8 parts of chitosan and 40-50 parts of water.
Preferably, the preparation method of the groundwater remediation agent comprises the following steps:
(1) weighing the raw materials according to the underground water repairing agent;
(2) crushing potash feldspar, calcium oxide, humic acid, active carbon, ceramsite, ore and montmorillonite clay, sieving the crushed materials with a 100-mesh and 200-mesh sieve, and stirring and mixing the crushed materials to obtain a material A;
(3) adding cellulose into the material A, stirring and mixing to obtain a material B;
(4) and adding water into the material B, and granulating to obtain the groundwater remediation agent particles with the particle size of 5-6 mm.
Preferably, in the step (2), the stirring speed is 200-300r/min, and the time is 20-30 min.
Preferably, in the step (3), the stirring speed is 150-.
The groundwater remediation agent prepared by the raw materials and the preparation method can adsorb various heavy metal ions contained in groundwater, and meanwhile, the remediation agent adopts degradable raw materials, so that after the water body is remedied, the remediation agent cannot cause secondary pollution to the water body, the raw materials are easy to obtain, the treatment effect is good, and no secondary pollution is caused.
According to the technical scheme, compared with the prior art, the method for monitoring and controlling the pollution of the underground water is provided, aiming at the pollution monitoring and controlling of the underground water, downstream pollution sources are filtered in multiple directions, the polluted underground water is subjected to multiple treatment from the source, the purification efficiency is high, the investment cost is low, and the practicability is high.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The exterior of a filter wall in the following embodiment is sealed by a reverse osmosis membrane, and the filter wall is filled with nano manganese dioxide, graphene oxide and active carbon, wherein the ratio of the nano manganese dioxide to the graphene oxide to the active carbon is 6:3: 2.
Example 1
A method for monitoring and controlling groundwater pollution comprising the steps of:
(1) every 6km in the area2Setting a detection point, detecting an underground water source by adopting a water quality sensor, a water level sensor, a heavy metal detection sensor and a pH value sensor, recording a water source area with heavy pollution and establishing an underground well;
(2) sampling underground water through an underground well, detecting, analyzing and comparing, and analyzing the pollution condition of the underground water;
(3) determining a pollution source as a field to be prevented and controlled according to the pollution condition;
(4) blocking a field to be controlled by adopting a cement board, and then adding a groundwater remediation agent into the field to be controlled; and a filter wall is arranged at the downstream of the underground water source. The heavy metal content in the water before and after treatment is shown in table 1 below.
The detection items in the step (1) and the step (2) are water quality, water level, heavy metal content and pH value.
The groundwater remediation agent comprises the following raw materials: 25kg of potassium feldspar, 15kg of calcium oxide, 5kg of cellulose, 12kg of humic acid, 15kg of activated carbon, 3kg of montmorillonite clay, 6kg of chitosan and 40kg of water.
The preparation method of the groundwater remediation agent comprises the following steps:
(1) weighing the raw materials according to the underground water repairing agent;
(2) crushing potash feldspar, calcium oxide, humic acid, activated carbon, ceramsite, ore and montmorillonite clay, sieving with a 100-mesh sieve, and stirring at 300r/min for 20min to obtain a material A;
(3) adding cellulose into the material A, and stirring for 35min at the speed of 150r/min to obtain a material B;
(4) and adding water into the material B, and granulating to obtain the groundwater remediation agent particles with the particle size of 5 mm.
TABLE 1 heavy metal content in Water before and after treatment
| Lead (mg/L) | Zinc (mg/L) | Cadmium (mg/L) | Arsenic (mg/L) | Copper (mg/L) | |
| Before treatment | 0.621 | 3.626 | 0.051 | 0.242 | 2.160 |
| After treatment | 0.064 | 1.241 | 0.008 | 0.058 | 0.987 |
Example 2
A method for monitoring and controlling groundwater pollution comprising the steps of:
(1) every 7km in the area2Setting a detection point, detecting an underground water source by adopting a water quality sensor, a water level sensor, a heavy metal detection sensor and a pH value sensor, recording a water source area with heavy pollution and establishing an underground well;
(2) sampling underground water through an underground well, detecting, analyzing and comparing, and analyzing the pollution condition of the underground water;
(3) determining a pollution source as a field to be prevented and controlled according to the pollution condition;
(4) blocking a field to be controlled by adopting a cement board, and then adding a groundwater remediation agent into the field to be controlled; and a filter wall is arranged at the downstream of the underground water source. The heavy metal content in the water before and after treatment is shown in Table 2.
The detection items in the step (1) and the step (2) are water quality, water level, heavy metal content and pH value.
The groundwater remediation agent comprises the following raw materials: 30kg of potassium feldspar, 25kg of calcium oxide, 7kg of cellulose, 18kg of humic acid, 18kg of activated carbon, 5kg of montmorillonite clay, 8kg of chitosan and 50kg of water.
The preparation method of the groundwater remediation agent comprises the following steps:
(1) weighing the raw materials according to the underground water repairing agent;
(2) crushing potash feldspar, calcium oxide, humic acid, activated carbon, ceramsite, ore and montmorillonite clay, sieving with a 100-mesh sieve, and stirring at 300r/min for 20min to obtain a material A;
(3) adding cellulose into the material A, and stirring for 35min at the speed of 150r/min to obtain a material B;
(4) and adding water into the material B, and granulating to obtain the groundwater remediation agent particles with the particle size of 5 mm.
TABLE 2 heavy metal content in Water before and after treatment
| Lead (mg/L) | Zinc (mg/L) | Cadmium (mg/L) | Arsenic (mg/L) | Copper (mg/L) | |
| Before treatment | 0.456 | 2.626 | 0.029 | 0.198 | 1.958 |
| After treatment | 0.045 | 1.069 | 0.006 | 0.051 | 0.895 |
Example 3
A method for monitoring and controlling groundwater pollution comprising the steps of:
(1) every 7km in the area2Setting a detection point, detecting an underground water source by adopting a water quality sensor, a water level sensor, a heavy metal detection sensor and a pH value sensor, recording a water source area with heavy pollution and establishing an underground well;
(2) sampling underground water through an underground well, detecting, analyzing and comparing, and analyzing the pollution condition of the underground water;
(3) determining a pollution source as a field to be prevented and controlled according to the pollution condition;
(4) blocking a field to be controlled by adopting a cement board, and then adding a groundwater remediation agent into the field to be controlled; and a filter wall is arranged at the downstream of the underground water source.
The detection items in the step (1) and the step (2) are water quality, water level, heavy metal content and pH value. The heavy metal content in the water before and after treatment is shown in Table 3.
The groundwater remediation agent comprises the following raw materials: 28kg of potassium feldspar, 20kg of calcium oxide, 6kg of cellulose, 15kg of humic acid, 17kg of activated carbon, 4kg of montmorillonite clay, 7kg of chitosan and 47kg of water.
The preparation method of the groundwater remediation agent comprises the following steps:
(1) weighing the raw materials according to the underground water repairing agent;
(2) crushing potash feldspar, calcium oxide, humic acid, activated carbon, ceramsite, ore and montmorillonite clay, sieving with a 100-mesh sieve, and stirring at 300r/min for 20min to obtain a material A;
(3) adding cellulose into the material A, and stirring for 35min at the speed of 150r/min to obtain a material B;
(4) and adding water into the material B, and granulating to obtain the groundwater remediation agent particles with the particle size of 5 mm.
TABLE 2 heavy metal content in Water before and after treatment
| Lead (mg/L) | Zinc (mg/L) | Cadmium (mg/L) | Arsenic (mg/L) | Copper (mg/L) | |
| Before treatment | 0.456 | 2.626 | 0.029 | 0.198 | 1.958 |
| After treatment | 0.045 | 1.069 | 0.006 | 0.051 | 0.895 |
The data in the table show that the method has low cost for treating the pollution of the underground water, and the pollutants in the method for repairing and treating the polluted underground water can be degraded and removed in situ, so that the excellent repairing effect can be realized in a short time, and secondary pollution can not be generated; and the groundwater remediation agent can also be degraded in situ to avoid secondary pollution.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for monitoring and controlling groundwater pollution, comprising the steps of:
(1) setting a plurality of detection points in the range of a mining area, detecting an underground water source, recording a water source area with heavy pollution and establishing an underground well;
(2) sampling underground water through an underground well, detecting, analyzing and comparing, and analyzing the pollution condition of the underground water;
(3) determining a pollution source as a field to be prevented and controlled according to the pollution condition;
(4) blocking a field to be controlled by a water blocking device, and then adding a groundwater remediation agent into the field to be controlled; and a filter wall is arranged at the downstream of the underground water source.
2. A method for monitoring and controlling groundwater pollution according to claim 1, wherein in the step (1), the density of the detection points is set to 6-7km2A/one.
3. A method for monitoring and controlling groundwater pollution according to claim 1, wherein in the step (1), the detection device is a water quality sensor, a water level sensor, a heavy metal detection sensor or a pH value sensor.
4. A method for monitoring and controlling groundwater pollution according to claim 1, wherein the items detected in the steps (1) and (2) are water quality, water level, heavy metal content and pH value.
5. A method of monitoring and controlling groundwater pollution as claimed in claim 1, wherein in step (4), the water retaining device is a cement board or a geomembrane.
6. The method as claimed in claim 1, wherein the exterior of the filter wall is sealed by a reverse osmosis membrane, and the filter wall is filled with nano manganese dioxide, graphene oxide and activated carbon, wherein the mass ratio of the nano manganese dioxide, the graphene oxide and the activated carbon is (5-6): 2-3: 1-2.
7. A method for monitoring and controlling groundwater pollution according to claim 1, wherein in the step (4), the groundwater remediation agent comprises the following raw materials in parts by weight: 25-30 parts of potassium feldspar, 15-25 parts of calcium oxide, 5-7 parts of cellulose, 12-18 parts of humic acid, 15-18 parts of activated carbon, 3-5 parts of montmorillonite clay, 6-8 parts of chitosan and 40-50 parts of water.
8. A method of monitoring and controlling groundwater pollution according to claim 7, wherein the groundwater remediation agent is prepared by a method comprising the steps of:
(1) weighing the raw materials according to the underground water repairing agent;
(2) crushing potash feldspar, calcium oxide, humic acid, active carbon, ceramsite, ore and montmorillonite clay, sieving the crushed materials with a 100-mesh and 200-mesh sieve, and stirring and mixing the crushed materials to obtain a material A;
(3) adding cellulose into the material A, stirring and mixing to obtain a material B;
(4) and adding water into the material B, and granulating to obtain the groundwater remediation agent particles with the particle size of 5-6 mm.
9. The method as claimed in claim 1, wherein in step (2), the stirring speed is 200-300r/min and the time is 20-30 min.
10. The method as claimed in claim 1, wherein in step (3), the stirring speed is 150-200r/min and the time is 30-50 min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113880156A (en) * | 2021-10-20 | 2022-01-04 | 中地宝联(北京)国土资源勘查技术开发集团有限公司 | Filtering adsorption treatment method for preventing and treating heavy metal pollution of underground water in mining area |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113880156A (en) * | 2021-10-20 | 2022-01-04 | 中地宝联(北京)国土资源勘查技术开发集团有限公司 | Filtering adsorption treatment method for preventing and treating heavy metal pollution of underground water in mining area |
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Application publication date: 20210416 |