CN108555015A - A kind of electric repair method in situ and equipment of portable contaminated soil - Google Patents
A kind of electric repair method in situ and equipment of portable contaminated soil Download PDFInfo
- Publication number
- CN108555015A CN108555015A CN201810440148.5A CN201810440148A CN108555015A CN 108555015 A CN108555015 A CN 108555015A CN 201810440148 A CN201810440148 A CN 201810440148A CN 108555015 A CN108555015 A CN 108555015A
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- contaminated soil
- electrode
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- cathode
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Classifications
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- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a kind of electric repair method in situ of portable contaminated soil, first, two holes is made a call in the suitable position of contaminated soil, respectively as cathode can and anode slot；Second, it is full of electrolyte in cathode can and anode slot and places electrode respectively, two electrodes are connect with the positive and negative anodes of power supply respectively, and the contaminated soil between power supply, electrode and electrode is made to form conductive path；Between the electrodes, ionic adsorption partition board is set between contaminated soil and electrolyte.The method of the invention flexibly can easily realize contaminated soil in-situ immobilization, and realize that secondary recovery utilizes.
Description
Technical field
The invention belongs to environment dirt Treatment process field, and in particular to a kind of original position of portable contaminated soil is electronic
Restorative procedure and equipment can be moved flexibly, the flowing of oriented control pollutant, secondary pollution risk is small, it is fast to repair, is processed into
This is low, can especially handle hypotonicity soil, overcome the problems, such as common pore plugging, be suitable for the disposition of heavy metal polluted soil.
Background technology
With the fast development of economic society, environmental is also constantly being deepened, and seepage pit Soil Environmental Pollution is serious,
Heavy metal contaminants as its primary pollution source, do not allowed to neglect by the ecological environment destruction that causes and the problem of jeopardizing health
Depending on.Contaminated seepage pit is distributed between farmland more, and for hand excavation, dispersed distribution, pollutant residence time in the soil body can be grown
Up to decades, there is an urgent need to take effective recovery technique to be administered.
Convenience, economy and the controllability that based technique for in-situ remediation is constructed due to it are wide in the reparation of contaminated soil
General application.Soil in-situ recovery technique common at present has peripheral doses, chemical remediation and biological prosthetic method.Traditional object
Reason recovery technique mainly has heavy metal pollution of soil, soil replacement method, deep ploughing to dig, electric heating recovery technique, vitrification etc., and first three methods are suitable
It is suitable for the improvement of any contaminated soil, but is only limitted to small range use, the soil for the carrying heavy metal contaminants being disposed is still
There are the risks of secondary pollution, and the slightly larger then long-distance transport of scale and cost of disposal are too high, are unsuitable for large-scale promotion.Electric heating is repaiied
Recovering technology carries out heating using high frequency voltage to soil makes pollutant be desorbed from soil particle, but processing cost is too
Height is only applicable to the improvement of the volatile heavy metals pollutant such as mercury, caesium.
Invention content
It is an object of the present invention to a kind of electric repair methods in situ of portable contaminated soil to provide simultaneously
Relevant device, flexibly can easily realize contaminated soil in-situ immobilization, and realize that secondary recovery utilizes.
The invention provides firstly a kind of electric repair method in situ of portable contaminated soil, including following steps
Suddenly：
First, two holes are made a call in the suitable position of contaminated soil, respectively as cathode can and anode slot；
Second, place full of electrolyte and respectively electrode in cathode can and anode slot, two electrodes respectively with power supply
Positive and negative anodes connect, and the contaminated soil between power supply, electrode and electrode is made to form conductive path；Between the electrodes, in contaminated soil
Ionic adsorption partition board is set between electrolyte.
Wherein, power supply applies voltage of direct-flow voltage regulation, electrode, electricity of the electric current from power source anode followed by anode slot to electrode
The electrode of contaminated soil, cathode can between pole eventually passes back to power cathode, forms conductive path.
Wherein, the ionic adsorption partition board using through modification of sodium carbonate nano flyash and nano zero valence iron be made.
Wherein, ionic adsorption partition board periphery is coated with filter cloth.
Wherein, in repair process, voltage gradient is in 1-2Vcm-1。
Wherein, it is provided with ammeter in conductive path.
Wherein, pH sensors are respectively equipped in the cathode can and anode slot；Also distinguish in the cathode can and anode slot
Pipe fitting is adjusted equipped with pH, the pH sensors are connect by signal or circuit with external control device, the pH regulation pipes
Connector adjusts liquid storage device with external pH by pipeline and connect, and inputs pH into electrolyte under control of the control means
Adjust liquid.External controller and pH, which adjust liquid storage device, can be integrated in Portable movable charging appliance (load wagon, dress
Carrier etc.) in.
Wherein, the electrode uses graphite electrode, the electrolyte to use potassium dihydrogen phosphate-sodium hydroxide of 0.1mol/L
Buffer solution；The pH of the electrolyte adjusts liquid, and anode uses the sodium hydroxide solution of 15mol/L, cathode to use the salt of 10mol/L
Acid solution.
The invention additionally provides the electro reclamation equipment in situ of portable contaminated soil, including removable load fills
It sets, hydraulic boring unit is mounted on the removable loading attachment, pH adjusts liquid storage box and infusion pump, the infusion pump setting
It it is two, the pH adjusts liquid storage box and is arranged as required to as one or more, and the pH adjusts liquid storage box and passes through pipeline
It is connect with the infusion pump.
Preferably, the pH adjusts liquid storage box and is set as two, is correspondingly connected with respectively with the infusion pump, described two
Infusion pump adjusts pipe fitting B-2 and pH by the pH in pipeline and the cathode can and anode slot respectively and adjusts pipe fitting A-2 companies
It connects.
Wherein, the hydraulic boring unit is loaded by apparatus for adjusting position on removable loading attachment, the position tune
Regulating device includes firm banking and is used to support the fixed block of hydraulic boring unit, in angular between the firm banking and fixed block
If there are two retractable support lever, the fixing end of the retractable support lever is hinged with the firm banking, described scalable
The telescopic end of supporting rod is hinged with the fixed block bottom.
Wherein, the removable loading attachment is equipped with switch board, switch board by signal or circuit respectively with cathode can
It connects with pH sensors C-2 with the pH sensors D-2 in anode slot, is also connect respectively with infusion pump by signal or circuit.
Wherein, the removable loading attachment is truck；The infusion pump is big flow peristaltic pump.
Compared with prior art, the method for the invention preferably solve during contaminated soil remediation it is of high cost,
The problem of efficiency is low, easy initiation secondary pollution risk improves soil in-situ remediation efficiency simultaneously using the absorption of ionic adsorption partition board
Realize that the secondary recovery of heavy metal utilizes, the monitoring regulation mechanism of pH value, which strictly controls electrolyte ph, to be prevented from causing soil acid-base
Change, further increases remediation efficiency, shortens the construction period, be suitble to be promoted in large-scale seepage pit Polluted Soil reparation.The invention
Hydraulic boring unit, pH are adjusted the reparations such as liquid storage box, infusion pump, switch board by the electro reclamation equipment in situ also provided simultaneously
Integration of equipments can flexibly move on a Load-Carrying Equipment (automobile) according to place is repaired, and it is heavy, mixed and disorderly to avoid equipment
Disadvantage, what hydraulic drilling equipment can be flexible and convenient arranges drilling in contaminated site, need not be easy to construct by other equipment
And short time limit, save man power and material.
Description of the drawings
The attached drawing for constituting the part of the invention is used for providing further understanding the invention, present invention wound
The illustrative embodiments and their description made do not constitute the improper restriction to the invention for explaining the invention.
In attached drawing：
Fig. 1-2 is the relative arrangement structural schematic diagram of electrode and conductive path in contaminated soil.
Fig. 3 is the structural schematic diagram of electro reclamation equipment in situ.
Specific implementation mode
It creates, the invention is further retouched in order to better understand the present invention with reference to specific attached drawing
It states.
The electric repair method in situ for the portable contaminated soil that the invention provides, includes the following steps：
First, two holes are made a call in the suitable position of contaminated soil 6, respectively as cathode can and anode slot；
Second, in cathode can and anode slot full of electrolyte 4 and respectively place electrode 3, two electrodes 3 respectively with power supply
1 positive and negative anodes connection, makes the contaminated soil between power supply 1, electrode 3 and electrode 3 form conductive path；Between electrode 3, in dirt
(or intersection) setting ionic adsorption partition board 5 is contaminated between soil 6 and electrolyte 4.The relative arrangement of electrode and conductive path is such as
Shown in Fig. 1-2.
Wherein, the ionic adsorption partition board 5 is obtained using following methods：Deionization is used after flyash is crossed 0.075mm sieves
Water washing is simultaneously dried 24 hours under the conditions of 105 DEG C, according to 1:3 by natrium carbonicum calcinatum and treated that flyash mixes,
It is calcined 2 hours under the conditions of 800 DEG C with Muffle furnace, is put into drying basin and is cooled to room temperature, deionized water is added at 80 degrees Celsius
Lower stirring 5 hours, then stirring at normal temperature 3 hours, after dissolved 30 minutes in ultrasound and carry out that solid is obtained by filtration, by solid and hydrogen
The ratio that 2.5 milliliters of solution are added according to 1 gram of solid for the sodium hydroxide solution of a concentration of 0.6mol/L of oxygen root is mixed, ultrasound
Stirring and dissolving 2 hours, hydrothermal crystallizing obtains mixed liquor for 24 hours under the conditions of 80 DEG C, obtains filter residue after filtering, uses deionized water
Washing is to neutrality, and 105 DEG C of drying obtain nano flyash in 8 hours, according to nano flyash and nano zero valence iron according to 1：1 uniformly
It is 15% that moisture content is adjusted after mixing, and being forced into 10Mpa or so through grinding tool is kept for 30 minutes, is dried 8 hours through 105 DEG C after unloading
Obtain.
Power supply 1 applies voltage of direct-flow voltage regulation, electrode, electrode of 1 anode of electric current from power source followed by anode slot to electrode 3
Between contaminated soil, cathode can electrode, eventually pass back to 1 cathode of power supply, form conductive path.Electrolyte 4 can enhance electricity
The contact of pole 3 and contaminated soil 6 is conducive to electrical current stabilization.It is dirty under electromigration and the electrodialysis effect of electrical current
Heavy metal ion in dye soil is oriented movement, Cd2+、Ni2+、Pb2+、Cu2+Equal metal cations are moved to cathode can,
CrO4 2-、Cr2O7 2-、HCrO4 -Equal anionic metals are moved to anode slot, and migrating can to heavy metal ion when ionic adsorption partition board 5
To be attracted in partition board, contaminated soil may be implemented by regularly replacing or handling (cleaning, reparation etc.) ionic adsorption partition board 5
The discharge of middle heavy metal ion and secondary recovery utilize.The setting of ionic adsorption partition board 5 overcomes in traditional restorative procedure and uses
High rehabilitation cost problem caused by replacing the mode that heavy metal is discharged for electrode and electrolyte, because conventional method replaces quantities
Greatly, need to be equipped with special more exchange device, be not easy to carry out the secondary recovery of heavy metal, admittedly replace electrode and electrolyte very without
Ji.In addition, having that researches show that traditional restorative procedures in repair process, heavy metal ion can not be completely migrating in electrode,
But just assemble in the certain distance of surrounding them, it is not moving, therefore the treatment effect for replacing electrode is also bad.
Wherein, 5 periphery of ionic adsorption partition board is coated with filter cloth, and filter cloth aperture can choose setting, filter cloth as needed
Can replace and handle together together with ionic adsorption partition board 5, extraction is concentrated in unified recycling, improve heavy metal ion recycling and
Secondary use effect.
Wherein, in repair process, control voltage gradient is in 1-2Vcm-1, heavy metal ion can be effectively facilitated in ion
Adsorb the enrichment absorption at partition board 5.
Wherein, ammeter 2, real-time monitor and repairing electric current are provided in conductive path.
Wherein, pH sensor D-2 and pH sensor C-2 are respectively equipped in the cathode can and anode slot, for supervising in real time
The pH for surveying electrolyte 4 changes and exports detection signal；PH is further respectively had in the cathode can and anode slot adjusts pipe fitting B-2
Pipe fitting A-2 is adjusted with pH, liquid is adjusted for supplementing fresh pH into electrolyte 4, ensures electrolyte ph in repair process
Stabilization.The pH sensors (D-2, C-2) can be connect by signal or circuit with external control device, and control correlation
PH is adjusted in parts, and the pH, which adjusts pipe fitting (B-2, A-2), to adjust liquid storage by pipeline and external pH
Device connects, and fills into pH into electrolyte 4 under control of the control means and adjust liquid.External controller and pH adjust liquid and deposit
Storage device can be integrated in portable charging appliance (load wagon, loading frame etc.), convenient for management and be safeguarded, hereinafter into one
Step description.On the one hand the monitoring regulation mechanism of pH value ensure that repairing effect, on the other hand can prevent anode from being generated because of electrolysis
Hydrogen ion excessive the moving to hydroxide ion that makes soil acidification and cathode be generated by electrolysis in contaminated soil it is excessive
Moving to makes alkalization of soils in contaminated soil；The change of the valence state of heavy metal in soil ion, it is the most apparent with Cr VI, in alkali
Property environment under can be reduced into trivalent chromium precipitation be not migrated in the soil, influence repairing effect.
Wherein, the electrode 3 uses graphite electrode, the electrolyte 4 to use potassium dihydrogen phosphate-hydroxide of 0.1mol/L
Sodium buffer solution；The pH of the electrolyte adjusts liquid, and anode uses the sodium hydroxide solution of 15mol/L, and cathode is using 10mol/L's
Hydrochloric acid solution.
The invention additionally provides the electro reclamation equipment in situ 7 (Fig. 3) of portable contaminated soil, including removable dress
It carries and sets, hydraulic boring unit 701, pH adjusting liquid storage box 702 and infusion pump 703 are mounted on the removable loading attachment,
The infusion pump 703 is set as two, and the pH adjusts liquid storage box 702 and is arranged as required to as one or more, the pH
Liquid storage box 702 is adjusted to connect with the infusion pump 703 by pipeline.Preferably, the pH adjusts liquid storage box 702 and is set as
Two, be correspondingly connected with respectively with the infusion pump 703, described two infusion pumps 703 respectively by pipeline and the cathode can and
PH in anode slot adjusts pipe fitting B-2 and is connected with pH adjustings pipe fitting A-2 (that is, a pH adjusts liquid storage box by one
Infusion pump and the pH of cathode can adjust pipe fitting B-2 connections, another pH adjusts liquid storage box and passes through another infusion pump and sun
The pH of pole slot adjusts pipe fitting A-2 connections), realize that the supplement respectively that liquid is adjusted to pHpH in cathode can and anode slot is adjusted.
Wherein, the hydraulic boring unit 701 is loaded by apparatus for adjusting position on removable loading attachment, the position
Regulating device includes firm banking 705 and is used to support the fixed block 706 of hydraulic boring unit 701, the firm banking 705 and solid
Determine to set there are two retractable support lever 707 in angular between block 706, the fixing end of the retractable support lever 707 with it is described
Firm banking 705 is hinged, and the telescopic end of the retractable support lever 707 is hinged with 706 bottom of the fixed block.By adjusting
Two retractable support levers 707 of apparatus for adjusting position can realize that the adjustment to 701 position of hydraulic boring unit controls, thus
The orientation needed drills, and the hole being drilled carries out the in-situ immobilization operation of contaminated soil as cathode can and/or anode slot.
Wherein, switch board 704 is additionally provided on the removable loading attachment, the switch board is filled as external control
It sets, is connect with the pH sensor D-2 and pH sensors C-2 in cathode can and anode slot by signal or circuit, also passed through respectively
Signal or circuit are connect with infusion pump 703 respectively.The switch board 704 realizes automatically controlling for pH adjustings, pH sensors D-2
PH detection signals are sent to switch board 704 in real time with pH sensors C-2, when pH deviates setting value, switch board sends out signal
The startup of corresponding infusion pump 703 is controlled, pH, which is adjusted the self-corresponding pH of liquid, adjusts the cathode can that liquid storage box 702 is pumped into pH exceptions
Or in anode slot, pH is made to restore to normal level.
Wherein, the removable loading attachment is preferably truck, can realize flexible movement, drives hydraulic boring unit
The 701 equal suitable positions for easily reaching contaminated soil drill.The infusion pump 703 is preferably big flow peristaltic pump, energy
Enough flowings for effectively pH being promoted to adjust liquid are conveyed.
The foregoing is merely the preferred embodiments of the invention, are not intended to limit the invention creation, all at this
Within the spirit and principle of innovation and creation, any modification, equivalent replacement, improvement and so on should be included in the invention
Protection domain within.
Claims (9)
1. a kind of electric repair method in situ of portable contaminated soil, includes the following steps：
First, two holes are made a call in the suitable position of contaminated soil (6), respectively as cathode can and anode slot；
Second, in cathode can and anode slot full of electrolyte (4) and respectively place electrode (3), two electrodes (3) respectively with electricity
The positive and negative anodes in source (1) connect, and the contaminated soil between power supply (1), electrode (3) and electrode (3) is made to form conductive path；In electrode
(3) between, ionic adsorption partition board (5) is set between contaminated soil (6) and electrolyte (4).
2. the electric repair method in situ of portable contaminated soil according to claim 1, which is characterized in that power supply (1)
Voltage of direct-flow voltage regulation is applied to electrode (3), electric current from power source (1) anode is followed by the dirt between the electrode of anode slot, electrode
The electrode of dye soil, cathode can, eventually passes back to power supply (1) cathode, forms conductive path.
3. the electric repair method in situ of portable contaminated soil according to claim 1, which is characterized in that the ion
Nano flyash and nano zero valence iron of absorption partition board (5) use through modification of sodium carbonate are made.
4. the electric repair method in situ of portable contaminated soil according to claim 1, which is characterized in that the ion
Absorption partition board (5) periphery is coated with filter cloth.
5. the electric repair method in situ of portable contaminated soil according to claim 1, which is characterized in that repair process
In, voltage gradient is in 1-2Vcm-1。
6. the electric repair method in situ of portable contaminated soil according to claim 1, which is characterized in that the conduction
Ammeter (2) is provided in access.
7. the electric repair method in situ of portable contaminated soil according to claim 1, which is characterized in that the cathode
PH sensors are respectively equipped in slot and anode slot；PH is further respectively had in the cathode can and anode slot adjusts pipe fitting, it is described
PH sensors are connect by signal or circuit with external control device, and the pH adjusts pipe fitting and passes through pipeline and external pH
The connection of liquid storage device is adjusted, and input pH adjusts liquid into electrolyte (4) under control of the control means.
8. the electric repair method in situ of portable contaminated soil according to claim 7, which is characterized in that described external
Control device and pH adjust liquid storage device and are integrated in dress in the car.
9. the electric repair method in situ of portable contaminated soil according to claim 1, which is characterized in that the electrode
(3) graphite electrode, the electrolyte (4) is used to use potassium dihydrogen phosphate-sodium hydrate buffer solution of 0.1mol/L；The electrolysis
The pH of liquid (4) adjusts liquid, and anode uses the sodium hydroxide solution of 15mol/L, cathode to use the hydrochloric acid solution of 10mol/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810440148.5A CN108555015A (en) | 2018-05-09 | 2018-05-09 | A kind of electric repair method in situ and equipment of portable contaminated soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810440148.5A CN108555015A (en) | 2018-05-09 | 2018-05-09 | A kind of electric repair method in situ and equipment of portable contaminated soil |
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| CN108555015A true CN108555015A (en) | 2018-09-21 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332372A (en) * | 2018-12-14 | 2019-02-15 | 浙江中地净土科技有限公司 | A kind of electro reclamation vertical unit of heavy-metal contaminated soil |
| CN110479752A (en) * | 2019-07-08 | 2019-11-22 | 南京迪天高新产业技术研究院有限公司 | A kind of electric repair method for hyposmosis contaminated soil |
| CN112872019A (en) * | 2021-01-15 | 2021-06-01 | 江苏大地益源环境修复有限公司 | Device and method for repairing organic matter contaminated soil through electric reinforcement and chemical oxidation |
| CN112974497A (en) * | 2021-03-29 | 2021-06-18 | 河南鸣皋智能科技有限公司 | Agricultural heavy metal pollution farmland soil repair system |
| CN114774129A (en) * | 2022-03-29 | 2022-07-22 | 中冶南方都市环保工程技术股份有限公司 | Electrolyte for electrically repairing hexavalent chromium polluted soil and electric repairing method |
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| CN206153285U (en) * | 2016-10-15 | 2017-05-10 | 太原理工大学 | Molysite is reinforceed electrokinetic remediation electronic waste and is disassembled ground heavy metal contaminated soil device |
| CN106698582A (en) * | 2017-01-24 | 2017-05-24 | 天津师范大学 | Method for treating industrial wastewater containing heavy metal contaminants by utilizing industrial fly ash and nano iron |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332372A (en) * | 2018-12-14 | 2019-02-15 | 浙江中地净土科技有限公司 | A kind of electro reclamation vertical unit of heavy-metal contaminated soil |
| CN110479752A (en) * | 2019-07-08 | 2019-11-22 | 南京迪天高新产业技术研究院有限公司 | A kind of electric repair method for hyposmosis contaminated soil |
| CN110479752B (en) * | 2019-07-08 | 2021-07-30 | 南京迪天高新产业技术研究院有限公司 | Electric restoration method for low-permeability polluted soil |
| CN112872019A (en) * | 2021-01-15 | 2021-06-01 | 江苏大地益源环境修复有限公司 | Device and method for repairing organic matter contaminated soil through electric reinforcement and chemical oxidation |
| CN112974497A (en) * | 2021-03-29 | 2021-06-18 | 河南鸣皋智能科技有限公司 | Agricultural heavy metal pollution farmland soil repair system |
| CN114774129A (en) * | 2022-03-29 | 2022-07-22 | 中冶南方都市环保工程技术股份有限公司 | Electrolyte for electrically repairing hexavalent chromium polluted soil and electric repairing method |
| CN114774129B (en) * | 2022-03-29 | 2024-01-23 | 中冶南方都市环保工程技术股份有限公司 | Electrolyte for electrically repairing hexavalent chromium polluted soil and electrically repairing method |
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Application publication date: 20180921 |