CN112645403A - Underground water heavy metal treatment system and method based on porous polymer - Google Patents
Underground water heavy metal treatment system and method based on porous polymer Download PDFInfo
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- CN112645403A CN112645403A CN202011097640.0A CN202011097640A CN112645403A CN 112645403 A CN112645403 A CN 112645403A CN 202011097640 A CN202011097640 A CN 202011097640A CN 112645403 A CN112645403 A CN 112645403A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 229920000642 polymer Polymers 0.000 title claims abstract description 56
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 13
- 239000000945 filler Substances 0.000 claims abstract description 52
- 239000003673 groundwater Substances 0.000 claims abstract description 25
- 238000012806 monitoring device Methods 0.000 claims description 15
- ZDRMMTYSQSIGRY-UHFFFAOYSA-N 1,3,5-triethynylbenzene Chemical group C#CC1=CC(C#C)=CC(C#C)=C1 ZDRMMTYSQSIGRY-UHFFFAOYSA-N 0.000 claims description 14
- 239000004568 cement Substances 0.000 claims description 14
- 239000000178 monomer Substances 0.000 claims description 14
- 239000000017 hydrogel Substances 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 10
- QFTZULJNRAHOIY-UHFFFAOYSA-N 1,4-dibromo-2,3,5,6-tetrafluorobenzene Chemical compound FC1=C(F)C(Br)=C(F)C(F)=C1Br QFTZULJNRAHOIY-UHFFFAOYSA-N 0.000 claims description 7
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 7
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 7
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 7
- 229910001424 calcium ion Inorganic materials 0.000 claims description 7
- 238000004132 cross linking Methods 0.000 claims description 7
- 239000003431 cross linking reagent Substances 0.000 claims description 7
- 239000002243 precursor Substances 0.000 claims description 7
- 235000010413 sodium alginate Nutrition 0.000 claims description 7
- 229940005550 sodium alginate Drugs 0.000 claims description 7
- 239000000661 sodium alginate Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 2
- RVPVRDXYQKGNMQ-UHFFFAOYSA-N lead(2+) Chemical compound [Pb+2] RVPVRDXYQKGNMQ-UHFFFAOYSA-N 0.000 abstract description 15
- WLZRMCYVCSSEQC-UHFFFAOYSA-N cadmium(2+) Chemical compound [Cd+2] WLZRMCYVCSSEQC-UHFFFAOYSA-N 0.000 abstract description 12
- 238000001179 sorption measurement Methods 0.000 abstract description 10
- 229910021645 metal ion Inorganic materials 0.000 abstract 1
- 239000011701 zinc Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 7
- 238000011065 in-situ storage Methods 0.000 description 5
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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- 229910052725 zinc Inorganic materials 0.000 description 2
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
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- 208000025966 Neurological disease Diseases 0.000 description 1
- 208000009527 Refractory anemia Diseases 0.000 description 1
- 206010072684 Refractory cytopenia with unilineage dysplasia Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 208000015606 cardiovascular system disease Diseases 0.000 description 1
- 210000003169 central nervous system Anatomy 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
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- 239000003344 environmental pollutant Substances 0.000 description 1
- 231100000234 hepatic damage Toxicity 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000008818 liver damage Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Abstract
The invention provides a groundwater heavy metal treatment system based on a porous polymer, and belongs to the technical field of water treatment. The underground water heavy metal treatment system based on the porous polymer comprises a first reaction wall body, a second reaction wall body and a third reaction wall body which are sequentially arranged at intervals along the water flow direction; the first reaction wall, the second reaction wall and the third reaction wall respectively comprise a permeable wall surface and a filler embedded and wrapped in the permeable wall surface; the fillers are respectively p-Zn2+、Pb2+And Cd2+Has selective adsorption. The invention uses the porous polymer with selectivity to specific metal ions as the filler, and can realize Zn in the groundwater2+、Pb2+And Cd2+Selective adsorption, and realizes the discharge of the groundwater up to the standard.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a groundwater heavy metal treatment system and method based on porous polymers.
Background
With the development of economy in China, the activities of heavy metal collection, smelting, processing and product manufacturing are increasing day by day, and the pollution of underground water by heavy metal is more serious. The zinc, lead and cadmium which exceed the standard in the groundwater have obvious toxicity to people, animals, plants and microorganisms, can not be degraded by the microorganisms, and are easy to be enriched in organisms to generate obvious toxic effect. Human drinking groundwater contaminated with heavy metals for a long time may cause cardiovascular, pulmonary, neurological and endocrine system diseases. For example, zinc ion may cause refractory anemia, lead ion may cause central nervous system irritation, kidney and liver damage, and cadmium (II) ion may cause kidney damage.
The existing methods for repairing underground water containing heavy metals mainly comprise an in-situ repair technology and an ex-situ repair technology. The in-situ remediation technology is a technology for remedying the polluted object in situ without carrying the polluted object under the natural condition that the land and the underground water are basically not damaged; the ectopic repair technology means that polluted objects are collected and extracted firstly, transferred to the ground and then repaired. Compared with ex-situ repair, the in-situ repair technology can save cost, reduce the repair work amount and reduce the disturbance of pollutants to the environment to the maximum extent.
Permeable reactive barrier repair (PRB) is an in-situ repair technology, which can be used at presentThe filler used by the permeable reactive barrier is limestone, gravel, plant ash and activated sludge, and the filler has poor selectivity to heavy metals and cannot effectively remove Zn in the underground water2+、Pb2+And Cd2+Heavy metals.
Disclosure of Invention
In view of the above, the present invention provides a groundwater heavy metal treatment system and method based on porous polymer, and the groundwater heavy metal treatment system provided by the invention can selectively adsorb heavy metal Zn in groundwater2+、Pb2+And Cd2+And the emission of the underground water reaching the standard is realized.
In order to achieve the purpose of the invention, the invention provides the following technical scheme:
the invention provides a groundwater heavy metal treatment system based on a porous polymer, which comprises a first reaction wall body, a second reaction wall body and a third reaction wall body which are sequentially arranged at intervals along the water flow direction;
the first reaction wall comprises a first permeable wall surface and a first filler embedded and wrapped inside the first permeable wall surface, and the first filler is a first porous polymer of which the reaction monomer is 1,3, 5-triethynyl benzene;
the second reaction wall comprises a second permeable wall surface and a second filler nested and wrapped inside the second permeable wall surface, and the second filler is a second porous polymer of which the reaction monomers are 1,3, 5-triethynyl benzene and 1, 4-dibromo tetrafluorobenzene;
the third reaction wall body comprises a third permeable wall surface and a third filler embedded and wrapped inside the third permeable wall surface, the third filler is hydrogel synthesized by taking sodium alginate and polyethylene oxide as precursors and calcium ions as a cross-linking agent, and the cross-linking degree of the hydrogel is 0.01-0.0114.
Preferably, the water outflow sides of the first reaction wall, the second reaction wall and the third reaction wall are respectively provided with a first online water quality monitoring device, a second online water quality monitoring device and a third online water quality monitoring device.
Preferably, the molecular weight of the first porous polymer and the molecular weight of the second porous polymer are 8000-16000 independently.
Preferably, the particle diameters of the first filler, the second filler and the third filler are independently 20-150 nm, and the specific surface areas are independently 600-1000 m2The pore volume is 0.1-0.35 cm independently3/g。
Preferably, the material of permeable wall is cement, the thickness of first permeable wall, second permeable wall and third permeable wall is independently 1 ~ 5 mm.
Preferably, the volume ratio of the first reaction wall, the second reaction wall and the third reaction wall to the underground water to be treated is 0.5-1: 0.5-1: 0.5-1: 5 to 10.
The invention provides a method for treating heavy metals in underground water by using the treatment system based on the scheme, which comprises the following steps:
and enabling the groundwater to sequentially pass through the first reaction wall, the second reaction wall and the third reaction wall.
Preferably, the method further comprises detecting the quality of the groundwater passing through the first reaction wall, the second reaction wall and the third reaction wall respectively.
Preferably, the flow velocity of the underground water before passing through the first reaction wall body is 0.1-1 m3/s。
The invention provides a groundwater heavy metal treatment system based on a porous polymer, which comprises a first reaction wall body, a second reaction wall body and a third reaction wall body which are sequentially arranged at intervals along the water flow direction; the first reaction wall comprises a first permeable wall surface and a first filler nested and wrapped inside the first permeable wall surface; the second reaction wall comprises a second permeable wall surface and a second filler nested and wrapped inside the second permeable wall surface; the third reaction wall body comprises a third permeable wall surface and a third filler nested and wrapped inside the third permeable wall surface. In the present invention, the first filler is p-Zn2+A porous polymer having selective adsorption properties, and a second filler comprising para-Pb2+Porous polymer with selective adsorption, and the third filler is p-Cd2+Porous with selective adsorptionA polymer. The device provided by the invention can realize the aim of Zn2 +、Pb2+And Cd2+The enrichment is respectively carried out, the adsorption rate is high, the selective recovery of Zn, Pb and Cd metals is facilitated, and the standard-reaching discharge of underground water can be realized. Meanwhile, the device provided by the invention is modularized and is convenient to assemble and maintain.
Drawings
FIG. 1 is a schematic structural view of a groundwater heavy metal treatment system based on a porous polymer according to the present invention,
FIG. 2 is a cross-sectional view of a reaction wall of the present invention;
in fig. 1 and 2, 1 is a first reaction wall, 2 is a second reaction wall, 3 is a third reaction wall, 4 is a first water quality online monitoring device, 5 is a second water quality online monitoring device, 6 is a third water quality online monitoring device, 7 is underground water, 8 is a first filler, 9 is a first permeable wall, 10 is a second filler, 11 is a second permeable wall, 12 is a third filler, and 13 is a third permeable wall.
Detailed Description
The invention provides a groundwater heavy metal treatment system based on a porous polymer, which comprises a first reaction wall body 1, a second reaction wall body 2 and a third reaction wall body 3 which are sequentially arranged at intervals along the water flow direction;
the first reaction wall comprises a first permeable wall surface and a first filler embedded and wrapped inside the first permeable wall surface, and the first filler is a first porous polymer of which the reaction monomer is 1,3, 5-triethynyl benzene;
the second reaction wall comprises a second permeable wall surface and a second filler nested and wrapped inside the second permeable wall surface, and the second filler is a second porous polymer of which the reaction monomers are 1,3, 5-triethynyl benzene and 1, 4-dibromo tetrafluorobenzene;
the third reaction wall body comprises a third permeable wall surface and a third filler embedded and wrapped inside the third permeable wall surface, the third filler is hydrogel synthesized by taking sodium alginate and polyethylene oxide as precursors and calcium ions as a cross-linking agent, and the cross-linking degree of the hydrogel is 0.01-0.0114.
The underground water heavy metal treatment system based on the porous polymer provided by the invention comprises a first reaction wall body, a second reaction wall body and a third reaction wall body which are sequentially arranged at intervals along the water flow direction. In the invention, the shape of the reaction wall body is preferably rectangular, the invention has no special requirement on the thickness of the reaction wall body along the water flow direction, and the reaction wall body is designed correspondingly according to the treated water quantity. In the invention, the volume ratio of the first reaction wall, the second reaction wall and the third reaction wall to the underground water to be treated is preferably 0.5-1: 0.5-1: 0.5-1: 5 to 10, more preferably 1:1:1:6 to 8. The width and the height of the reaction wall body are not required to be special, and the reaction wall body is designed correspondingly according to actual working conditions.
In the present invention, the apparatus is preferably installed in a natural ditch or an artificially excavated ditch, and the bottom surface, the left side surface, and the right side surface of the reaction wall are attached to the ditch (wherein the reaction wall is divided into four side surfaces of front, rear, left, and right, and the front and rear side surfaces are oriented along the direction of groundwater). The invention does not make special requirements on the spacing distance between the first reaction wall and the second reaction wall and the spacing distance between the second reaction wall and the third reaction wall. In the invention, the first reaction wall, the second reaction wall and the third reaction wall are in a series structure.
In the invention, the first reaction wall comprises a first permeable wall surface and a first filler embedded and wrapped inside the first permeable wall surface, and the first filler is a first porous polymer of which the reaction monomer is 1,3, 5-triethynyl benzene. In the present invention, the number average molecular weight of the first porous polymer is preferably 8000 to 16000, and more preferably 10000 to 12000.
In the present invention, the first porous polymer is preferably tubular in shape, and the diameter thereof is preferably 20 to 150nm, and more preferably 50 to 100 mm. In the present invention, the specific surface area of the first porous polymer is preferably 600 to 1000m2(iv)/g, more preferably 700 to 900m2The pore volume is preferably 0.1-0.35 cm/g3A concentration of 0.2 to 0.3cm3/g。
In the invention, the first permeable wall surface is preferably made of cement, and the thickness of the first permeable wall surface is preferably 1-5 mm, and more preferably 2-4 mm.
In the invention, the second reaction wall comprises a second permeable wall surface and a second filler nested and wrapped inside the second permeable wall surface, and the second filler is a second porous polymer of which the reaction monomers are 1,3, 5-triethynyl benzene and 1, 4-dibromo tetrafluorobenzene. In the present invention, the number average molecular weight of the second porous polymer is preferably 8000 to 16000, and more preferably 10000 to 12000.
In the present invention, the diameter of the second porous polymer is preferably 20 to 150nm, and more preferably 50 to 100 mm. In the present invention, the specific surface area of the second porous polymer is preferably 600 to 1000m2(iv)/g, more preferably 700 to 900m2The pore volume is preferably 0.1-0.35 cm/g3A concentration of 0.2 to 0.3cm3/g。
In the invention, the second permeable wall surface is preferably made of cement, and the thickness of the second permeable wall surface is preferably 1-5 mm, and more preferably 2-4 mm.
In the invention, the third reaction wall body comprises a third permeable wall surface and a third filler nested and wrapped inside the third permeable wall surface, the third filler is hydrogel which takes sodium alginate and polyethylene oxide as precursors and calcium ions as cross-linking agents, and the cross-linking degree of the hydrogel is 0.01-0.0114, preferably 0.0112. In the present invention, the pair Cd2+The number average molecular weight of the porous polymer with selective adsorbability is preferably 8000-16000, and more preferably 10000-12000.
In the invention, the third permeable wall surface is preferably made of cement, and the thickness of the third permeable wall surface is preferably 1-5 mm, and more preferably 2-4 mm.
In the invention, the water outflow sides of the first reaction wall, the second reaction wall and the third reaction wall are preferably respectively provided with a first online water quality monitoring device, a second online water quality monitoring device and a third online water quality monitoring device. The invention monitors the type and model of the water quality on-line monitoring equipmentWithout special requirements, Zn is realized by using water quality on-line monitoring equipment well known to the technical personnel in the field2+、Pb2+And Cd2+Monitoring of the concentration, in particular, the first on-line monitoring device is used for monitoring Zn2+The second on-line monitoring device is used for monitoring Pb2+The third on-line monitoring device is used for monitoring Zn2+The concentration of (c).
The invention provides a method for treating heavy metals in underground water based on the device in the technical scheme, which comprises the following steps:
and enabling the groundwater to sequentially pass through the first reaction wall, the second reaction wall and the third reaction wall.
The invention has no special requirements on the water quality and the source of the underground water, and the underground water with any water quality and source can be treated by using the device and the method. In the invention, the flow velocity of the underground water before passing through the first reaction wall body is preferably 0.1-1 m3More preferably 0.4 to 0.6 m/s3And s. In the present invention, the height of the groundwater is lower than that of the reaction wall. According to the invention, the underground water is preferably pumped through the first reaction wall, the second reaction wall and the third reaction wall.
The present invention preferably further comprises monitoring the quality of groundwater passing through the first reaction wall, the second reaction wall, and the third reaction wall, respectively. When Zn is in groundwater2+、Pb2+Or Cd2+When the concentration of (B) does not meet the emission requirement, the corresponding filler needs to be replaced.
The groundwater heavy metal treatment system and method based on porous polymer according to the present invention will be described in detail with reference to the following examples, which should not be construed as limiting the scope of the present invention.
Example 1
Treating underground water of mining industry of the autonomous region exploitation of inner Mongolia, wherein the permeable wall surface of the first reaction wall body is made of cement and has the thickness of 1 mm; the filler is p-Zn2+The porous polymer with selective adsorption property is prepared from 1,3, 5-triethynyl benzene as reactive monomerThe number average molecular weight of the polymer was 8000 and the specific surface area was 600m2Per g, pore volume 0.1cm3(ii)/g; the porous polymer is tubular, and the diameter of the porous polymer is 20 nm;
the permeable wall surface of the second reaction wall body is made of cement and has the thickness of 2 mm; the filler is para Pb2+The porous polymer with selective adsorption comprises 1,3, 5-triethynyl benzene and 1, 4-dibromo tetrafluorobenzene, and has number average molecular weight of 10000 and specific surface area of 800m2Per g, pore volume 0.15cm3(ii)/g; the diameter of the porous polymer is 40 nm;
the permeable wall surface of the third reaction wall body is made of cement and has the thickness of 1 mm; the filler is p-Cd2+The reaction monomer of the porous polymer with selective adsorbability is hydrogel synthesized by taking sodium alginate and polyethylene oxide as precursors and calcium ions as a cross-linking agent, and the cross-linking degree is 0.01.
Make the underground water at 0.1m3The speed of/s is through the underground water heavy metal treatment system, Zn in the underground water2+、Pb2+And Cd2+The content of the compound meets the class III standard in GB/T14848-2017 underground water quality standard.
Example 2
Treating underground water of mining industry of the autonomous region exploitation of inner Mongolia, wherein the permeable wall surface of the first reaction wall body is made of cement and has the thickness of 2 mm; the filler is p-Zn2+The selectively adsorptive porous polymer is prepared from 1,3, 5-triethynyl benzene as reactive monomer, and has number-average molecular weight of 12000 and specific surface area of 800m2Per g, pore volume 0.2cm3(ii)/g; the porous polymer is tubular, and the diameter of the porous polymer is 60 nm;
the permeable wall surface of the second reaction wall body is made of cement and has the thickness of 3 mm; the filler is para Pb2+The porous polymer with selective adsorption has reaction monomers of 1,3, 5-triethynyl benzene and 1, 4-dibromo tetrafluorobenzene, the number average molecular weight of the porous polymer is 16000, and the specific surface area is 1000m2Per g, pore volume 0.35cm3(ii)/g; the diameter of the porous polymer is 80 nm;
permeable wall surface of third reaction wall bodyThe material is cement, and the thickness is 2 mm; the filler is p-Cd2+The reaction monomer of the porous polymer with selective adsorbability is hydrogel synthesized by taking sodium alginate and polyethylene oxide as precursors and calcium ions as a cross-linking agent, and the cross-linking degree is 0.0114.
Make the underground water at 0.5m3The speed of/s is through the underground water heavy metal treatment system, Zn in the underground water2+、Pb2+And Cd2+The content of the compound meets the class III standard in GB/T14848-2017 underground water quality standard.
Example 3
Treating underground water of mining industry of the autonomous region exploitation of inner Mongolia, wherein the permeable wall surface of the first reaction wall body is made of cement and has the thickness of 5 mm; the filler is p-Zn2+The porous polymer with selective adsorption has reaction monomer of 1,3, 5-triethynyl benzene, number average molecular weight of 8000 and specific surface area of 1000m2Per g, pore volume 0.35cm3(ii)/g; the porous polymer is tubular, and the diameter of the porous polymer is 50 nm;
the permeable wall surface of the second reaction wall body is made of cement and has the thickness of 5 mm; the filler is para Pb2+The selective adsorption porous polymer comprises 1,3, 5-triethynyl benzene and 1, 4-dibromo tetrafluorobenzene, and has the number average molecular weight of 8000 and the specific surface area of 600m2Per g, pore volume 0.12cm3(ii)/g; the diameter of the porous polymer is 60 nm;
the permeable wall surface of the third reaction wall body is made of cement and has the thickness of 5 mm; the filler is p-Cd2+The reaction monomer of the porous polymer with selective adsorbability is hydrogel synthesized by taking sodium alginate and polyethylene oxide as precursors and calcium ions as a cross-linking agent, and the cross-linking degree is 0.011.
Make the underground water at 1m3The speed of/s is through the underground water heavy metal treatment system, Zn in the underground water2+、Pb2+And Cd2+The content of the compound meets the class III standard in GB/T14848-2017 underground water quality standard.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A groundwater heavy metal treatment system based on porous polymers comprises a first reaction wall, a second reaction wall and a third reaction wall which are sequentially arranged at intervals along the water flow direction;
the first reaction wall comprises a first permeable wall surface and a first filler embedded and wrapped inside the first permeable wall surface, and the first filler is a first porous polymer of which the reaction monomer is 1,3, 5-triethynyl benzene;
the second reaction wall comprises a second permeable wall surface and a second filler nested and wrapped inside the second permeable wall surface, and the second filler is a second porous polymer of which the reaction monomers are 1,3, 5-triethynyl benzene and 1, 4-dibromo tetrafluorobenzene;
the third reaction wall body comprises a third permeable wall surface and a third filler embedded and wrapped inside the third permeable wall surface, the third filler is hydrogel synthesized by taking sodium alginate and polyethylene oxide as precursors and calcium ions as a cross-linking agent, and the cross-linking degree of the hydrogel is 0.01-0.0114.
2. The treatment system of claim 1, wherein a first online water quality monitoring device, a second online water quality monitoring device and a third online water quality monitoring device are respectively arranged on the water outflow sides of the first reaction wall, the second reaction wall and the third reaction wall.
3. The treatment system according to claim 1 or 2, wherein the molecular weight of the first porous polymer and the second porous polymer is 8000 to 16000 independently.
4. The device according to claim 1 or 2, wherein the first, second and third fillers independently have a particle size of 20 to 150nmThe specific surface area is 600-1000 m independently2The pore volume is 0.1-0.35 cm independently3/g。
5. The treatment system of claim 1, wherein the permeable wall surface is made of cement, and the first permeable wall surface, the second permeable wall surface and the third permeable wall surface are independently 1-5 mm thick.
6. The treatment system according to claim 1, wherein the volume ratio of the first reaction wall, the second reaction wall and the third reaction wall to the underground water to be treated is 0.5-1: 0.5-1: 0.5-1: 5 to 10.
7. The method for treating the heavy metals in the underground water based on the treatment system of any one of claims 1 to 6 is characterized by comprising the following steps:
and enabling the groundwater to sequentially pass through the first reaction wall, the second reaction wall and the third reaction wall.
8. The method of claim 7, further comprising detecting the quality of the groundwater passing through the first reaction wall, the second reaction wall, and the third reaction wall, respectively.
9. The method according to claim 7, wherein the flow velocity of the groundwater before passing through the first reaction wall is 0.1-1 m3/s。
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