CN205851554U - A kind of electrodynamics hydrodynamic seepage pressure (EK PRB) device being applicable to the reparation of field condition combined contamination soil - Google Patents
A kind of electrodynamics hydrodynamic seepage pressure (EK PRB) device being applicable to the reparation of field condition combined contamination soil Download PDFInfo
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- CN205851554U CN205851554U CN201620722939.3U CN201620722939U CN205851554U CN 205851554 U CN205851554 U CN 205851554U CN 201620722939 U CN201620722939 U CN 201620722939U CN 205851554 U CN205851554 U CN 205851554U
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Abstract
The application relates to a kind of electrodynamics hydrodynamic seepage pressure (EK PRB) device being applicable to field condition soil remediation and technique, this device mainly uses the solar powered of environmental protection to be main, electromotor or mains-supplied are auxiliary electric power system, can need to export the electrical propulsion unit of 0 220V DC voltage according to experiment, electrical propulsion unit and PRB use connected mode in situ.Anode and cathode uses graphite electrode.PRB reaction medium is mainly wide material sources, cheap zeolite, activated carbon and attapulgite modified composition, and PRB and graphite electrode constitute permeable reaction combination electrode.Can change at any time after PRB reaction medium loses efficacy.Anode and cathode uses hexagon disposing way, overcomes conventional anodic-cathodic operating distance short, the shortcoming of non-uniform electric.This device makes EK PRB technology be applied to field condition contaminated site reparation to be possibly realized.Additionally this technique does not has an anode and cathode tank house, but uses the citric acid sodium citrate of environmental protection and biodegradable anion surfactant as eluent soil to carry out drip washing, not only heavy metal and also organochlorine can effectively be removed.
Description
Technical field
The application relates to a kind of contaminated soil remediation device, and specifically, the application relates to one and is applicable to field condition again
Electrodynamics-hydrodynamic seepage pressure (EK-PRB) device closed.
Background technology
Contaminated soil remediation the most increasingly comes into one's own, abroad, some technology come into engineering mimoir and
Application stage.Conventional soil restoring technology mainly has chemical leaching technology, electric repairing technique, PRB technology etc..Due to soil
The differences such as composition, pollutant type, character, particularly in the case of the different simultaneous combined pollutions of pollutant, single repair
Recovering technology is often difficult to reach to repair target, and therefore, the combination application of different recovery techniques increasingly comes into one's own.
EK-PRB combined remediation technology is a kind of novel, the soil restoring technology of environmental protection risen in recent years, main
If electric repairing technique is combined common repairing polluted soil with permeability response wall technology.This technology combines two kinds
The advantage of recovery technique, by heavy metal higher for toxicity and organic substance (such as Cr (VI), TCE, PCE etc.) with electric power make its to
Electrode tip moves, and makes polluter and permeability response filling base material within the walls react, is degraded into the low-valent metal that toxicity is relatively low
Ion and Organic substance, can not only restoration of soil polluted by heavy metal can be with repairing organic polluted soil, even to hypotonicity
Contaminated soil has preferable repairing effect, and is affected relatively small by extraneous factor, it is to avoid add environment in soil the most friendly
Good type material, rehabilitation cost is low many than additive method.
EK-PRB combined remediation technology is as an emerging efficient based technique for in-situ remediation, although Principles is the simplest
Single, but on the spot, contaminated site repair process needs to consider a lot of actual parameter, operate extremely complex.Domestic EK-PRB is
Resting on the laboratory research stage, main by DC source connection negative and positive the two poles of the earth, negative and positive electrolysis bath is continuous by buffer solution
Regulation pH value, if being that each anode and cathode configures an electrolysis bath according to laboratory installation, for field repair, will be big
Amplitude increases the difficulty of practical operation, and adds processing cost.And between due to the electrode at laboratory installation negative and positive the two poles of the earth
Away from the shortest, about 20cm, be not suitable for onsite application in the wild.Additionally, due to anode and cathode voltage operating distance is short, process the time
Length, efficiency are low, pollutant single (mainly heavy metal Cd or Cr), and China's soil pollution at present is mainly with multi-metal or weight
The combined pollution of metal-organic pollution is relatively universal, so a set of remediation efficiency is high, expense is low, operable in the urgent need to researching and developing
Property by force for device and the technique of on-the-spot combined contamination soil repairing and treating.
Summary of the invention
The present invention comprises the electric power that electrodynamics-hydrodynamic seepage pressure (EK-PRB) combination in situ is main function components
With PRB combined unit and technological process.
In order to realize the purpose of the present invention, the application the technical scheme is that
A kind of electrodynamics-hydrodynamic seepage pressure (EK-PRB) device repaired for field condition combined contamination soil,
It is characterized in that: include electrical propulsion unit and PRB device, described electrical propulsion unit includes electrode and voltage adjusting device, described electricity
The most a length of 35-40cm and be set to exceed contaminated soil 5～10cm, described electrode uses regular polygon mode to arrange, described
PRB device includes PRB active reaction material (3) being placed on described surrounding them, by wire gauze (4) by described PRB activity
The combination electrode that reaction material (3) is formed with described electrode is crowded around fixing, and contaminated soil (5) to be repaired is filled in wire gauze
(4) between, described electrode is arranged in contaminated soil (5) both sides to be repaired, and contaminated soil (5) lower section to be repaired is arranged
Impervious barrier, described impervious barrier is had to include the plastic foil (9) of tiled arrangements successively, 5-7cm thickness zeolite (6), 5-7cm thickness cast-iron scrap
And 2-5cm thickness activated carbon (8) (7).
Further, described electrode includes negative electrode (1), anode (2), and described voltage adjusting device is commutator transformer (10), institute
Stating negative electrode (1) uses regular hexagon mode to arrange, described anode (2) is arranged in regular hexagon center, described negative electrode (1) and/or
Spacing between described anode (2) is 30cm.
Further, described electrode includes negative electrode (1), anode (2), and described voltage adjusting device is commutator transformer (10), institute
Stating anode (2) uses regular hexagon mode to arrange, described negative electrode (1) is arranged in regular hexagon center, described negative electrode (1) and/or
Spacing between described anode (2) is 30cm.
Further, electrodynamics devices uses and solar powered is main, electromotor or mains-supplied is auxiliary, passes through direct current
Transformator output interval is the DC voltage of 0～220V.
Further, electrodynamics devices use mains-supplied, by commutator transformer output interval be 0～220V straight
Stream voltage.
Further, described electrode is coated graphite rod electrrode, diameter 2-4cm, voltage gradient 1～2V/cm.
Further, described combined contamination soil is heavy metal and organochlorine contamination contaminated soil, described PRB active reaction
Material (3) is zeolite, cast-iron scrap, attapulgite and activated carbon.
Further, placement multiple PRB active material around the graphite electrode of negative and positive the two poles of the earth, combines shape with graphite electrode
Become permeable reaction combination electrode.
Compared with traditional EK-PRB device, this device not design anodic-cathodic room, but use and spray green ring
The eluent mode protected, by the pollutant in soil under eluent effect, enters into solution, and it is fixed to occur under electrodynamic action
To migration.Reaction material wide material sources, cheap, can change at any time after material failure.Anode and cathode uses hexagonal arrangement,
Overcome conventional anodic-cathodic operating distance short, the shortcoming of non-uniform electric.This device makes EK-PRB technology be applied to
Field condition contaminated site reparation is possibly realized.
Accompanying drawing explanation
Fig. 1 hydrodynamic seepage pressure combination electrode layout drawing；
Fig. 2 anodic-cathodic layout drawing.
1-anode, 2-negative electrode, 3-PRB active reaction material, 4-wire gauze, 5-heavy metal and soil polluted by organic chloride, 6-
Zeolite, 7-cast-iron scrap, 8-activated carbon, 9-plastic foil, 10-DC source transformator
Detailed description of the invention
The present invention relates to electric power and PRB combined unit associated with electrodynamics-hydrodynamic seepage pressure (EK-PRB) original position,
Including electrical propulsion unit and PRB device, described electrical propulsion unit is made up of electrode and single phase ac regulation equipment, wherein, and electricity
Pole material is chosen as graphite, graphite electrode is set to exceed contaminated soil depth H ' 5～10cm, and preferred a diameter of 2-4cm,
It is highly 35-40cm.Negative and positive the two poles of the earth 1,2 can use regular hexagon mode to arrange, i.e. six negative electrodes are arranged in four with regular hexagon
In week, anode arrangement is at regular hexagon center, or six anodes are disposed around with regular hexagon, and negative electrode is arranged in regular hexagon
The heart, each electrode spacing is 30cm.PRB active reaction material 3 is placed on around the graphite electrode rod of negative and positive the two poles of the earth, with graphite electrode shape
Become combination electrode, and by wire gauze 4, the combination electrode that PRB active reaction material 3 and graphite electrode 1,2 are formed is crowded around solid
Fixed.Contaminated soil 5 to be repaired is filled between wire gauze 4.Described anodic-cathodic is arranged in contaminated soil 5 to be repaired
Both sides, are provided with impervious barrier below contaminated soil 5 to be repaired, described impervious barrier includes the plastic foil 9 of tiled arrangements successively, 5-
7cm thickness zeolite 6,5-7cm thickness cast-iron scrap 7 and 2-5cm thickness activated carbon 8, impervious barrier height is consistent with the contaminated soil degree of depth.Impervious barrier
Can be also that other have the plastic foil of antiseep or have, with heavy metal and organochlorine, the material of physical-chemical reaction can occur.Treat
The contaminated soil 5 repaired is heavy metal and soil polluted by organic chloride.
The application is heavy metal and the reparation of organochlorine combined pollution for pollutant, and combined pollution can be a multiple huge sum of money
Belong to or multiple organochlorine or heavy metal and organochlorine, the PRB material for heavy metal and organochlorine combined pollution is sieved
Choosing, finally have selected zeolite, cast-iron scrap, attapulgite and activated carbon, and these four material is contained in long 15cm* width according to a certain percentage
In 10cm Nylon Bag, then put wire gauze into, as PRB reaction material, be determined through experimentation its optimum proportioning, zeolite and recessed
Convex rod soil heavy metal Cd all has good removal effect, and cast-iron scrap heavy metal Cr removal effect is obvious, and activated carbon is used
In the absorption of organochlorine, and it is contained in the sack that nylon wire is made, mix homogeneously, is filled in wire gauze 4, graphite electrode 1 or 2
Being placed on cylinder wire gauze 4 central point, the nylon wire equipped with four kinds of materials is filled in graphite electrode 4 surrounding as PRB reaction wood
Material 3, forms hydrodynamic seepage pressure combination electrode with graphite electrode 4.
Described electrical propulsion unit uses and solar powered is main, electromotor or civil power is auxiliary electric power system.DC source
The VD of transformator 10 is 0～220V, voltage gradient 1～2V/cm.PRB packing material by cast-iron scrap, activated carbon,
Zeolite and attapulgite modified filtrate composition.
The anode and cathode of the application uses hexagonal arrangement, and anode is in hexagonal center, the most hexagonal each
Negative electrode (see Fig. 2) is put on summit, this ensure that every pair of cathode and anode spacing is identical, when applying at the scene, according to repairing Ground
Long-pending size, can use multiple anode simultaneously, around puts negative electrode according to hexagonal arrangement, and this layout type makes EK-PRB technology
It is applied to field condition soil remediation be possibly realized.Being different from laboratory installation the negative and positive electrolysis bath used, the application is
Being poured onto in soil by spray regime by leacheate, pollutant occur electromigration, electro-osmosis or electrophoresis existing under electromotive action
As.
And the present invention uses direct spray regime to regulate soil pH and moisture content, saving electrolytic cell assembly, saving processes
Cost, simple to operate.
Embodiment 1:
Taking from certain contaminated site soil, repair with electric power and PRB United Technologies such as Fig. 1-2 device, soil is on-the-spot
Test head of district L is 2.5m, and wide D is 2m, and depth H is 0.5m, and treating capacity is 2.5m3.Tile below contaminated soil impervious barrier, will
Anodic-cathodic is put according to mode shown in Fig. 2, and anode is positioned at regular hexagon center, and negative electrode is positioned at each summit of regular hexagon,
Spacing d between anode and cathode is 30cm.Each graphite electrode is placed on the position, the wire gauze center of circle of a diameter of 14cm, a height of 40cm
Putting, fill hydrodynamic seepage pressure medium between graphite electrode and wire gauze, height keeps consistent, by contaminated site with depth of soil
Soil directly covers, and after compacting, applies direct current, and voltage gradient is 2v/cm.Can by 0.1M citric acid-sodium citrate and 0.5g/L
Biodegradable anion surfactant rhamnolipid washed off soil, moisture content keeps about 30%, and total processing time is 15
My god.
Before and after table 1 embodiment processes, contaminated soil index changes
| Title | Before process | After process | Total removal rate % |
| Cd(mg/kg) | 18.4 | 12.4 | 32.5 |
| Cr(mg/kg) | 184 | 126 | 31.5 |
| Gamma Hexaochlorocyclohexane (μ g/kg) | 83 | 43.2 | 48 |
| Clofenotane (μ g/kg) | 209 | 108.6 | 48 |
Described above it is merely exemplary for the purpose of the present invention, and nonrestrictive, and those of ordinary skill in the art understand,
In the case of the spirit and scope limited without departing from claims appended below, many amendments, change or equivalence can be made,
But fall within protection scope of the present invention.
Claims (8)
1. electrodynamics-hydrodynamic seepage pressure (EK-PRB) device repaired for field condition combined contamination soil, its
Being characterised by: include electrical propulsion unit and PRB device, described electrical propulsion unit includes electrode and voltage adjusting device, described electrode
A length of 35-40cm and be set to exceed contaminated soil 5～10cm, described electrode uses regular polygon mode to arrange, described PRB
Device includes PRB active reaction material (3) being placed on described surrounding them, by wire gauze (4) by described PRB active reaction
The combination electrode that material (3) is formed with described electrode is crowded around fixing, contaminated soil (5) to be repaired be filled in wire gauze (4) it
Between, described electrode is arranged in contaminated soil (5) both sides to be repaired, and contaminated soil (5) lower section to be repaired is provided with anti-
Infiltration layer, described impervious barrier include the plastic foil (9) of tiled arrangements successively, 5-7cm thickness zeolite (6), 5-7cm thickness cast-iron scrap (7) and
2-5cm thickness activated carbon (8).
Device the most according to claim 1, it is characterised in that: described electrode includes negative electrode (1), anode (2), described pressure regulation
Equipment is commutator transformer (10), and described negative electrode (1) uses regular hexagon mode to arrange, described anode (2) is arranged in positive six limits
Spacing between shape center, described negative electrode (1) and/or described anode (2) is 30cm.
Device the most according to claim 1, it is characterised in that: described electrode includes negative electrode (1), anode (2), described pressure regulation
Equipment is commutator transformer (10), and described anode (2) uses regular hexagon mode to arrange, described negative electrode (1) is arranged in positive six limits
Spacing between shape center, described negative electrode (1) and/or described anode (2) is 30cm.
4. according to the device one of claim 1-3 Suo Shu, it is characterised in that: electrodynamics devices employing is solar powered is
Master, electromotor or mains-supplied are auxiliary, by the DC voltage that commutator transformer output interval is 0～220V.
5. according to the device one of claim 1-3 Suo Shu, it is characterised in that: electrodynamics devices uses mains-supplied, passes through
Commutator transformer output interval is the DC voltage of 0～220V.
6. according to the device one of claim 1-3 Suo Shu, it is characterised in that: described electrode is coated graphite rod electrrode, diameter 2-
4cm, voltage gradient 1～2V/cm.
7. according to the device one of claim 1-3 Suo Shu, it is characterised in that: described combined contamination soil is heavy metal and organic
Chlorine pollution contaminated soil, described PRB active reaction material (3) is zeolite, cast-iron scrap, attapulgite and activated carbon.
8. according to the device one of claim 1-3 Suo Shu, it is characterised in that: around the graphite electrode of negative and positive the two poles of the earth, placement is many
Plant PRB active material, form permeable reaction combination electrode with graphite electrode combination.
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| CN201620722939.3U CN205851554U (en) | 2016-07-11 | 2016-07-11 | A kind of electrodynamics hydrodynamic seepage pressure (EK PRB) device being applicable to the reparation of field condition combined contamination soil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623397A (en) * | 2016-07-11 | 2017-05-10 | 国家地质实验测试中心 | Electrodynamics-permeation reaction grid device suitable for outdoor field repair of composite polluted soil and technological process |
| CN114192567A (en) * | 2021-12-08 | 2022-03-18 | 江苏澳洋生态园林股份有限公司 | Process for improving acidified contaminated soil |
-
2016
- 2016-07-11 CN CN201620722939.3U patent/CN205851554U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623397A (en) * | 2016-07-11 | 2017-05-10 | 国家地质实验测试中心 | Electrodynamics-permeation reaction grid device suitable for outdoor field repair of composite polluted soil and technological process |
| CN114192567A (en) * | 2021-12-08 | 2022-03-18 | 江苏澳洋生态园林股份有限公司 | Process for improving acidified contaminated soil |
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