CN106311738B - A kind of in-situ oxidation reduction repair system - Google Patents
A kind of in-situ oxidation reduction repair system Download PDFInfo
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- CN106311738B CN106311738B CN201610878400.1A CN201610878400A CN106311738B CN 106311738 B CN106311738 B CN 106311738B CN 201610878400 A CN201610878400 A CN 201610878400A CN 106311738 B CN106311738 B CN 106311738B
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- 230000008439 repair process Effects 0.000 title claims abstract description 20
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 18
- 230000033116 oxidation-reduction process Effects 0.000 title description 4
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 65
- 230000003647 oxidation Effects 0.000 claims abstract description 64
- 239000003814 drug Substances 0.000 claims abstract description 57
- 239000002689 soil Substances 0.000 claims abstract description 55
- 230000009467 reduction Effects 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000000909 electrodialysis Methods 0.000 claims abstract description 16
- 230000005684 electric field Effects 0.000 claims abstract description 11
- 230000015572 biosynthetic process Effects 0.000 claims abstract 2
- 230000007246 mechanism Effects 0.000 claims description 35
- 239000000126 substance Substances 0.000 claims description 23
- 239000003344 environmental pollutant Substances 0.000 claims description 10
- 231100000719 pollutant Toxicity 0.000 claims description 10
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 4
- 239000012028 Fenton's reagent Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 230000005012 migration Effects 0.000 claims description 2
- 238000013508 migration Methods 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims 1
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 7
- 238000005067 remediation Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003673 groundwater Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000008929 regeneration Effects 0.000 abstract description 2
- 238000011069 regeneration method Methods 0.000 abstract description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 30
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 24
- 239000000243 solution Substances 0.000 description 23
- 239000007788 liquid Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 9
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 230000001590 oxidative effect Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000007800 oxidant agent Substances 0.000 description 8
- 230000035699 permeability Effects 0.000 description 7
- 150000003254 radicals Chemical class 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000003513 alkali Substances 0.000 description 6
- 239000004927 clay Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000009191 jumping Effects 0.000 description 5
- 238000003918 potentiometric titration Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- -1 persulfuric acid Salt Chemical class 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000001994 activation Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- 206010020852 Hypertonia Diseases 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- 230000002153 concerted effect Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000005520 electrodynamics Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000575 pesticide Substances 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 2
- 239000012286 potassium permanganate Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005815 base catalysis Methods 0.000 description 1
- 235000019846 buffering salt Nutrition 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000003802 soil pollutant Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229960002415 trichloroethylene Drugs 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
- B09C1/085—Reclamation of contaminated soil chemically electrochemically, e.g. by electrokinetics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The present invention relates to a kind of in-situ oxidations to restore repair system, belongs to the technical field of regeneration of contaminated object.Including anode, cathode, injector well, collaboration pharmacy jar and oxidation/reduction pharmacy jar, cooperate with pharmacy jar supply collaboration medicament, oxidation/reduction pharmacy jar supplies oxidation/reduction medicament, and by pipeline connection to injector well, anode and cathode is inserted into respectively in soil to be processed or water quality, and energization forms electric field；First collaboration medicament is injected in soil to be processed or water quality, adjusts its pH, then fill oxidation/reduction medicament thereto；Electric current formation electric field is applied to electrode simultaneously and starts electrodialysis, while collaboration medicament and oxidation/reduction medicament migrate in soil to be processed or water quality, organic pollutant completes redox, that is, realizes reparation.Invention is applied to contaminated soil and groundwater remediation, has many advantages, such as that small investment, effect are fast.
Description
Technical field
The present invention relates to a kind of in-situ oxidations to restore repair system, belongs to the technical field of regeneration of contaminated object.
Background technique
Collaboration injection, common oxidating chemicals packet are carried out frequently with all kinds of oxidations or reduction medicament in soil and groundwater remediation
Hydrogen peroxide, persulfate, permanganate etc. are included, in order to reach suitable oxidation environment, acid-base property need to be adjusted, and generally require
Two or more medicament cooperates with injection.In injection process because place hydrogeologic condition and medicament itself because
Element is usually all to be fixed on a position.
By taking the injection of persulfate in-situ oxidation as an example, it is slow oxidation kinetics that sodium peroxydisulfate aoxidizes most pollutants at normal temperature
Reaction is learned, it is only effective to limited pollutant such as trichloro ethylene and dimethylbenzene.Under the conditions of the base catalysis of pH > 10, persulfuric acid
Salt can be catalyzed the potentiometric titrations (SO for generating and having strong oxidizing property4 -, oxidation/reduction current potential E0=2.6V), it can speed up
Oxidation reaction, and most of persistence organic pollutants of degrading.Potentiometric titrations oxidability is strong, and compares carboxyl free radical
It is more stable, it can effective contact stain object.Usual alkali activating mechanism is reduced to reaction equation:
S2O8 2-+2H2O→HO2 -+2SO4 2-+3H+；
HO2 -+S2O8 2-→SO4 -·+SO4 2-+H++O2 -·；
SO4 -·+OH-→SO4 2-+HO·。
Alkali activation sodium peroxydisulfate in-situ oxidation technology is a kind of sodium peroxydisulfate solution to be injected into underground oxidation water body and suction
It is attached in the target contaminant in soil, the target contaminant is made to be degraded to the recovery technique of low toxicity material.Sodium peroxydisulfate solubility
Greatly, the adjusting of reaction density can be carried out according to site condition, and the oxidant of high concentration can usually significantly improve oxidation efficiency；Tool
Have the advantages that applicable pollutant type is more, reaction is violent and easily operated, has been widely used in organic contamination place soil
Reparation in.
But in the poor soil of the permeability such as clay, due to hydraulic conductivity problem, the oxidation of sodium peroxydisulfate solution
Free radical migration slowly, can not effectively be spread, and small so as to cause effective oxidation range, remediation efficiency is low, traditional collaboration
Oxidation technology application is restricted.In addition to this, traditional alkali activation process generally mixes alkali and sodium peroxydisulfate using preceding
It is re-introduced into contaminated soil well, a part of sodium peroxydisulfate is consumed in mixed process.
Based on this, the application is made.
Summary of the invention
For the drawbacks described above in the presence of existing soil remediation, the application provides a kind of electric power and cooperates with oxygen in situ
The soil repair system that change/reduction combines, this system overcomes the defects of water conservancy conveying, and effectively by oxidation/reduction agent
It is delivered in the soil micropore of Polluted area, improves the efficiency of redox pollutant in soil, and investment is low, it is low in cost,
The in-situ oxidation reduction that can be used for low-permeability soil is repaired, the organic matter in degradation and removal soil and groundwater.
To achieve the above object, the technical solution that the application takes is as follows:
A kind of in-situ oxidation reduction repair system, including anode, cathode, injector well, collaboration pharmacy jar and oxidation/reduction medicine
Agent tank, collaboration pharmacy jar supply collaboration medicament, oxidation/reduction pharmacy jar supply oxidation/reduction medicament, and extremely by pipeline connection
At injector well, anode and cathode is inserted into respectively in soil to be processed or water quality, and energization forms electric field；First will collaboration medicament injection to
It handles in soil or water quality, adjusts its pH, then fill oxidation/reduction medicament thereto；Electric current is applied to electrode simultaneously and forms electricity
Field simultaneously starts electrodialysis, and while collaboration medicament and oxidation/reduction medicament migrate in soil to be processed or water quality, pollutant is complete
At oxidation/reduction, that is, realizes and repair.
Further, as preferred:
It is provided with metering pump on the supply line of the oxidation/reduction medicament and/or collaboration medicament, which enters
Diaphragm is set at mouthful.After solution long-time, it is easy to produce solid, therefore diaphragm to be added before metering pump, filtered miscellaneous
Matter protects metering pump.
The collaboration medicament is infused in the soil to be processed or water quality of anode position, is allowed to form alkali or acidity
Environment.
It is provided with urgent level control mechanism on the supply line of the oxidation/reduction medicament and/or collaboration medicament, when
When liquid level is too low, for prevention and treatment metering pump idle running, system can emergency alarm and automatic stop jumping.
It is provided with safety valve on the supply line of the oxidation/reduction medicament and/or collaboration medicament, pipeline pressure is excessively high
When can releasing pressure automatically.
It is provided with normal pressures table on the supply line of the oxidation/reduction medicament and/or collaboration medicament, monitors system
Pressure.
The injector well exit is equipped with pulse damper, and adjusting pressure is replenished in time, avoids pipeline pressure significantly
Fluctuation.
The collaboration medicament is the liquid reagent of all adjustable soil pH values.Soil pH is adjusted to 4.0-9.0 very
To broader range, available collaboration medicament such as sodium hydroxide, sulfuric acid solution, ferrous sulfate, sulphur powder, white lime, vegetation
Ash and buffering salt etc..
The oxidation/reduction medicament is persulfate (such as sodium peroxydisulfate solution), Fenton reagent (with ferrous ion (Fe2 +) it is catalyst hydrogen peroxide (H2O2) carry out chemical oxidation generate strong oxidizing property hydroxyl radical free radical, in aqueous solution with difficulty
Degradation of organic substances generate organic free radical be allowed to structure destruction, final oxygenolysis), (preferably permanganate is water-soluble for permanganate
Liquid) or Zero-valent Iron, ferrous ion, sulfide, sulphite, wherein persulfate (such as sodium peroxydisulfate solution), Fenton reagent,
The oxidants such as permanganate can handle petroleum hydrocarbon, BTEX (benzene, toluene, ethylbenzene, dimethylbenzene), phenols, MTBE (methyl tertbutyl
Ether), chloro-carbon solvent, polycyclic aromatic hydrocarbon, most of organic matter such as pesticide, Zero-valent Iron, ferrous ion, sulfide, sulphite
Equal reducing agents processing heavy metal classes (such as Cr VI) and chlorinatedorganic.
The electrodialysis speed is 2-5cm/d.
The working principle of the application are as follows: the working principle of oxidation/reduction is that chemical oxidation/reducing agent is injected into soil ring
In border, the pollutant in soil is converted to by their chemical reactions between pollutant the side of harmless chemical substance
Method.In the treatment process, how to avoid incomplete oxidation and intermediate oxidation product from polluting is a key, in this key
In, the permeability of soil is a core point for solving the problems, such as this again.Electrode (anode and cathode) is inserted into contaminated by the application
Underground water and soil region, after applying direct current, formed DC electric field.Since soil aperture surface is negatively charged, and with
Ion in pore water forms electric double layer, makes soil particle surface that there is electric double layer, pore water intermediate ion or particle to have charge,
Cause ion and particulate matter in soil pore water and water to be oriented along direction of an electric field to move.Diffusion electric double layer causes hole
Water along electric field, flow from cathode to anode by direction, becomes electrodialysis.The water flow that electrodialysis generates in soil aperture is relatively uniform,
Flow direction is easy to control.For compact clay soil, the water flow permeability that electrodialysis generates is permeated higher than hydraulics
Several orders of magnitude of rate, and power consumption is low.The speed of electrodialysis stream is typically about 2-5cm/d, living by electrodialysis methods
The free radical of change fast transferring in closely knit soil increases the efficient oxidation area of injector well, shortens the time, so as to avoid oxygen
Change insufficient problem.
In addition to this, special setting has also been made for the injection sequence of collaboration medicament in this system, in the base of electric power auxiliary
On plinth, first investment collaboration medicament (such as sodium hydroxide or sulfuric acid solution) is considered, adjust the pH value in soil, sodium hydroxide is such as added
In anode, and cathode is not necessarily to add sodium hydroxide solution, because electrolysis can generate a large amount of hydroxyl OH-, increase the pH value of anode；
Then oxidating chemicals (such as sodium peroxydisulfate solution or hydrogen peroxide, wherein the oxidation environment of hydrogen peroxide is acidity, Bu Neng are reinjected
The lower operation of alkalinity), sodium peroxydisulfate solution is such as injected, under alkaline environment, generates free radical such as sulphur largely with strong oxidizing property
Acid group free radical SO4 -, in electromagnetic field electrodialysis can occur for free radical, in the low clay of permeability, from anode to cathode
Fast transferring carries out oxidation/reduction effect to large-scale organic pollutant, reduces pollution concentration, these oxidating chemicals are to soil
Organic pollution materials in earth and underground water carry out concerted reaction, so that consumption of the oxidant in mixed process early period is reduced,
The collaboration utilization efficiency for increasing oxidant, further saves economic cost.
By certain density oxidating chemicals (such as sodium peroxydisulfate solution or hydrogen peroxide) and collaboration medicament (such as sodium hydroxide solution
Or sulfuric acid, oxidating chemicals are selected according to soil pollutant, collaboration medicament is selected according to oxidant, and some oxidants need
Want to react under alkaline condition, some then needs acidity) it is attached separately in two storage tanks.When tank level is excessively high, there is spilling wind
It to go trench is unified to collect when dangerous, prevent contamination of raw material ground.If being contacted for a long time with solution due to pump, it is easy to produce solid
Body, therefore diaphragm to be added before metering pump, impurity screening, protection pump；Urgent level control mechanism, safety valve is arranged in storage tank
With normal pressures table, when liquid level is too low, for prevention and treatment metering pump idle running, urgent level control mechanism can emergency alarm and
Automatic stop jumping；When pipeline pressure is excessively high, safety valve can releasing pressure automatically；Normal pressures table is then used to monitor system pressure；It is injecting
It is equipped with pulse damper at system outlet, adjusting pressure can be replenished in time, pipeline pressure is avoided to fluctuate widely.
Detailed description of the invention
Fig. 1 is the flow diagram of the application.
Wherein label: 1. anodes；2. cathode；3. injector well；4. cooperateing with pharmacy jar；5. oxidating chemicals tank；61. liquid level is shown
One；62. liquid level shows two；71. urgent level control mechanism one；72. urgent level control mechanism two；73. urgent level control
Mechanism three；74. urgent level control mechanism four；75. urgent level control mechanism five；76. urgent level control mechanism six；77.
Urgent level control mechanism seven；78. urgent level control mechanism eight；81. pressure gauge one；82. pressure gauge two；83. pressure gauge three；
84. pressure gauge four；91. safety valve one；92. safety valve two；93. safety valve three；94. safety valve four.
Specific embodiment
Embodiment 1
A kind of in-situ oxidation of the present embodiment restores repair system, in conjunction with Fig. 1, including anode 1, cathode 2, injector well 3, collaboration
Pharmacy jar 4 and oxidation/reduction pharmacy jar 5, anode 1, cathode 2 are inserted into contaminated underground water and soil region respectively, are applying
After direct current, DC electric field is formed；The injection of pharmacy jar 4 supplement water and collaboration medicament are cooperateed with, and passes through pipeline connection to injector well 3
Metering pump, urgent level control mechanism 1, urgent level control mechanism 2 72 are arranged thereon, diaphragm is added before metering pump for place,
The solid impurity for standing generation for a long time for the solution that comes, when liquid level is too low, to prevent metering pump from dallying, urgent level control
Mechanism 1, urgent level control mechanism 2 72 can emergency alarm and automatic stop jumpings；It cooperates between pharmacy jar 4 and injector well 3
Pressure gauge 1 and safety valve 1, pressure gauge 2 82 and safety valve 2 92, pressure gauge 1, pressure gauge 2 82 are set on pipeline
The pressure for detecting respective bye-pass, when the bye-pass hypertonia, safety valve 1, safety valve 2 92 distinguish releasing pressure automatically；
The injection of oxidation/reduction pharmacy jar 5 supplement water and oxidation/reduction medicament, and by being arranged at pipeline connection to injector well 3 thereon
Metering pump, urgent level control mechanism 3 73, urgent level control mechanism 4 74 are added diaphragm before metering pump, are used for molten
Liquid stands the solid impurity of generation for a long time, when liquid level is too low, to prevent metering pump from dallying, urgent level control mechanism 3 73,
Urgent level control mechanism 4 74 can emergency alarm and automatic stop jumping；Pipeline between oxidation/reduction pharmacy jar 5 and injector well 3
Upper setting pressure gauge 3 83 and safety valve 3 93, pressure gauge 4 84 and safety valve 4 94, pressure gauge 3 83, pressure gauge 4 84 detect
The pressure of respective bye-pass, when the bye-pass hypertonia, safety valve 3 93, safety valve 4 94 distinguish releasing pressure automatically；Injection
Pulse damper is arranged in the exit of well 3, and conciliation pressure is replenished in time, pipeline pressure is avoided to fluctuate widely
After in-situ oxidation/reduction repair system starting, anode 1 and cathode 2 are inserted into respectively in soil to be processed or water quality, first
Collaboration medicament is injected in soil to be processed or water quality, adjusts its pH, then fill oxidation/reduction medicament thereto；Simultaneously to electricity
Pole applies electric current and forms electric field and start electrodialysis, and collaboration medicament moves in soil to be processed or water quality with oxidation/reduction medicament
While shifting, organic pollutant completes oxidation/reduction, that is, realizes and repair.
Specific in the present embodiment, soil to be processed is low-permeability soil, and major pollutants are by taking chlorobenzene as an example one
The oxidating chemicals and collaboration medicament for determining concentration are respectively charged into oxidating chemicals tank 5 and collaboration pharmacy jar 4, and liquid level shows one 61, liquid
Face shows that 2 62 are separately mounted on collaboration pharmacy jar 4 and oxidating chemicals tank 5, using sodium hydroxide solution as collaboration medicament, choosing
The representative i.e. sodium peroxydisulfate solution in persulfate is selected as oxidating chemicals, under underground water temperature (15 DEG C) environment, persulfuric acid
Radical ion band can produce potentiometric titrations under specific catalyst inducement there are two electronics, and the potentiometric titrations are more
Stablize, and the pH range used is more extensive, can be between 2.5-11, working as under the conditions of pH > 10 has high reaction activity.Implemented
Sodium hydroxide solution is first injected anode 1 by Cheng Zhong, increases the pH value of anode 1, and cathode is not necessarily to add sodium hydroxide solution, because
Electrolysis can generate a large amount of hydroxyl, automatically increase pH value；It is subsequently injected into sodium peroxydisulfate solution, under alkaline environment, over cure
Acid sodium solution generates free radical largely with strong oxidizing property, such as potentiometric titrations, which can occur in electromagnetic field
Electrodialysis, in the low clay of permeability, from anode to cathode fast transferring, large-scale organic pollutant aoxidize/
Reduction reduces pollution concentration, reaches degradation and removes the organic matter in soil and underground water, realizes and repair purpose.
When liquid level is excessively high, when spilling, needs trench is unified to collect, and prevents the risk of leakage of medicament；Due to pump and medicament
After contacting for a long time, it is easy to produce solid, needs to be added diaphragm before metering pump, impurity screening protects metering pump；Cooperate with pharmacy jar
Urgent level control mechanism 1, urgent level control mechanism 2 72, urgent level control mechanism 5 75 and urgent are connected on 4
(urgent level control mechanism 5 75, urgent level control mechanism 6 76 are separately positioned on pressure gauge one to level control mechanism 6 76
81, on bye-pass corresponding to pressure gauge 2 82) and pressure gauge 1 and safety valve 1, pressure gauge 2 82 and safety valve two
92, urgent level control mechanism 3 73, urgent level control mechanism 4 74, urgent level control are connected on oxidating chemicals tank 5
(urgent level control mechanism 7 77, urgent level control mechanism 8 78 are distinguished for mechanism 7 77 and urgent level control mechanism 8 78
It is arranged on bye-pass corresponding to pressure gauge 3 83, pressure gauge 4 84) and pressure gauge 3 83 and safety valve 3 93, pressure gauge
4 84 with safety valve 4 94.When the fluid level is too low, to prevent metering pump from dallying, urgent level control mechanism understands emergency alarm simultaneously certainly
Dynamic stop jumping, when pipeline pressure is excessively high, safety valve can releasing pressure automatically.
Embodiment 2
The present embodiment is identical as the setting of embodiment 1 and working principle, and difference is: selection potassium permanganate conduct oxidation/
Reducing agent is repaired, and potassium permanganate is mainly used for the drop of soil and groundwater various organic pollutants and inorganic pollution
Solution, such as sulfide, cyanide, alkene, organochlorine, phenols, pesticide, polycyclic aromatic hydrocarbon.Process object is certain coke-oven plant underground 1-
The contaminated soil of 6m, after repairing 25 days, to the removal rate of the PAHs in sample between 78%-99%；Number of rings is lower
PAHs is almost completely removed, and the higher PAHs removal rate of number of rings is also 60% or more；PAHs's in clay (infiltration coefficient is small)
Removal rate is all larger than 90%.
The treatment effect table of comparisons of the different oxidants of table 1
Advantage and disadvantage of each oxidant of table 2 in soil remediation
The application is in repair process, under electrodynamic auxiliary, collaboration medicament is first added, adjusts the pH value of soil, so
After reinject oxidating chemicals, in soil and underground water organic pollution materials carry out concerted reaction, to reduce oxidation medicine
Consumption of the agent in mixed process early period increases the collaboration utilization efficiency of oxidating chemicals, further saves economic cost.
When the present embodiment is repaired for ground permeable soil, it is applicable to most of persistent organic pollutant, is being assisted
With the shortcomings that in the mechanism of medicament and oxidating chemicals, electrodynamic method overcomes Hydraulic transportation, medicine will be effectively aoxidized
Agent is delivered in the soil micropore of pollutant, since interstices of soil surface is negatively charged, is formed with the ion in interstitial water double
Electric layer, diffusion electric double layer cause pore water to flow along electric field from cathode 2 to 1 direction of anode, form electrodialysis.Electrodialysis is in soil
The water flow generated in gap is relatively uniform, and flow direction is easy to control, and compact clay soil, electrodialysis are generated
Water flow permeability is higher than several orders of magnitude of hydraulics permeability, and power consumption is low, and electrodialytic speed general control exists
2.5cm/d, oxidating chemicals fast transferring in secret emissary's soil such as sodium peroxydisulfate solution of alkali activation, increases the effective of injector well
Area is aoxidized, the efficiency of organic matter in oxidation soil is improved and investment is fewer, cost is cheaper.
Claims (7)
1. a kind of in-situ oxidation restores repair system, it is characterised in that: including anode, cathode, injector well, collaboration pharmacy jar and oxygen
Change/reduction pharmacy jar, collaboration pharmacy jar supply collaboration medicament, oxidation/reduction pharmacy jar supply oxidation/reduction medicament, concordant remedies
Agent tank and oxidation/reduction pharmacy jar pass through at pipeline connection to injector well, anode and cathode be inserted into respectively soil to be processed or
In water quality, energization forms electric field；First collaboration medicament is infused in the soil to be processed or water quality of anode position, adjusts it
PH, then oxidation/reduction medicament is filled thereto；Electric current formation electric field is applied to electrode simultaneously and starts electrodialysis, cooperates with medicament
While migration in soil to be processed or water quality with oxidation/reduction medicament, pollutant completes oxidation/reduction, that is, realizes and repair；
The oxidation/reduction medicament is persulfate, Fenton reagent, permanganate or Zero-valent Iron, ferrous ion, sulfide, sulfurous acid
Salt.
2. a kind of in-situ oxidation as described in claim 1 restores repair system, it is characterised in that: the oxidating chemicals and/
Or it is provided with metering pump on the supply line of collaboration medicament, diaphragm is arranged in the inlet of the metering pump.
3. a kind of in-situ oxidation as described in claim 1 restores repair system, it is characterised in that: the oxidating chemicals and/
Or urgent level control mechanism is provided on the supply line of collaboration medicament.
4. a kind of in-situ oxidation as described in claim 1 restores repair system, it is characterised in that: the oxidating chemicals and/
Or safety valve is provided on the supply line of collaboration medicament.
5. a kind of in-situ oxidation as described in claim 1 restores repair system, it is characterised in that: the oxidating chemicals and/
Or normal pressures table is provided on the supply line of collaboration medicament.
6. a kind of in-situ oxidation as described in claim 1 restores repair system, it is characterised in that: the injector well exit
Equipped with pulse damper.
7. a kind of in-situ oxidation as described in claim 1 restores repair system, it is characterised in that: the electrodialysis speed is
2-5cm/d。
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| CN107952790B (en) * | 2017-11-16 | 2020-09-11 | 中冶南方都市环保工程技术股份有限公司 | In-situ remediation method and system for contaminated site |
| CN107671116B (en) * | 2017-11-16 | 2023-01-10 | 北京高能时代环境技术股份有限公司 | Improved in-situ resistance heating thermal remediation system and method for organic matter contaminated soil or underground water |
| CN109848201B (en) * | 2019-01-14 | 2021-11-09 | 同济大学 | Electric power driving and electrothermal activation oxidation/reduction repair method |
| CN110201809A (en) * | 2019-05-08 | 2019-09-06 | 重庆美天环保工程有限公司 | A kind of medicine system for soil remediation |
| CN112570434A (en) * | 2020-11-26 | 2021-03-30 | 浙江风玉顺环保科技有限公司 | Prevention and treatment method for soil and underground water pollution in-situ injection well remediation system |
| CN114378112A (en) * | 2022-01-12 | 2022-04-22 | 江苏大地益源环境修复有限公司 | In-situ electric Fenton system and method for repairing organic matters in soil |
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| JP2006346519A (en) * | 2005-06-13 | 2006-12-28 | Kubota Corp | In-situ purification method of contaminated soil |
| JP2006346567A (en) * | 2005-06-15 | 2006-12-28 | Kubota Corp | In-situ purification method of contaminated soil |
| CN102989759B (en) * | 2012-11-15 | 2014-10-08 | 华北电力大学 | Device and method for remediation of in-situ fracturing aeration auxiliary electrochemical array well |
| KR101464878B1 (en) * | 2013-05-30 | 2014-11-25 | 에이치플러스에코 주식회사 | Remediation system for Multi-contaminated soils combining Chemical Oxidation and Soil Flushing and Electrokinetic Separation and Remediation method using the same |
| CN103286119B (en) * | 2013-06-07 | 2014-10-15 | 华北电力大学 | Device and method for restoring chlorobenzene-type organism polluted soil and underground water |
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| CN205308942U (en) * | 2015-09-01 | 2016-06-15 | 武汉都市环保工程技术股份有限公司 | Pollute soil electronic - chemical oxidation combined repairing system |
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