CN107900095A - A kind of self-generated electricity up-flow wetland contaminated soil remediation device and restorative procedure - Google Patents
A kind of self-generated electricity up-flow wetland contaminated soil remediation device and restorative procedure Download PDFInfo
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- CN107900095A CN107900095A CN201711209235.1A CN201711209235A CN107900095A CN 107900095 A CN107900095 A CN 107900095A CN 201711209235 A CN201711209235 A CN 201711209235A CN 107900095 A CN107900095 A CN 107900095A
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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
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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
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
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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
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
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- Processing Of Solid Wastes (AREA)
Abstract
A kind of self-generated electricity up-flow wetland contaminated soil remediation device and restorative procedure, belong to environmental protection technical field of soil remediation.Described device includes wetland pond body, wetland water distribution system, anaerobism electric charge collecting region and oxygen Charge scaling precipitate reduction area, intermediate pool, water circulating pump；The wetland water distribution system is arranged on the bottom in wetland pond body, the anaerobism electric charge collecting region is located in wetland pond body on wetland water distribution system, described and oxygen Charge scaling precipitate reduction area is located at the top of wetland pond body, on anaerobism electric charge collecting region, outside the intermediate pool is independently of wetland pond body, intermediate pool is connected by water circulating pump with wetland water distribution system, and intermediate pool discharges water pipe with being communicated at the top of wetland pond body by recirculated water.The present invention participates in reduction reaction, improves soil remediation efficiency, it is not necessary to increase power supply, realize self-generated electricity, selfreparing, this is not available for current wetland soil recovery technique by the use of heavy metal ion as electron acceptor.
Description
Technical field
The invention belongs to environmental protection technical field of soil remediation, and in particular to a kind of self-generated electricity flows up wetland contaminated soil
Prosthetic device and restorative procedure.
Background technology
Wetland pollutant abatement technology is because with effect is good, construction cost and operating cost are low, be easily managed, landscape performance is good
Advantage and especially circulate the one preferred technique of water harnessing as pollution control.
Wetland heavy metal ion contaminated soil remediation principle：Utilize this compound life of Wetland Substrate, microorganism and plant
State system carries out soil pollutant physics, chemistry and biological triple role, is filtered, adsorbed by wetland soil, wetland plant
Decomposition and wetland microbial degradation are absorbed to realize pollution purification.Microorganism in root system of plant flora and wetland is by soil
Bulky grain, the organic pollution of macromolecular are decomposed into the small molecule of little particle and ionic state by plant assimilating absorption in environment,
As the nutriment of plant growth, purification soil while promoting plant growth, realizes ecological soil reparation.Plant is absorbing
The heavy metal ion in soil is absorbed while nutriment, by realizing the harvest of plant to the heavy metal ion in soil
Purification；
But currently known wetland soil recovery technique, repair ability is poor, and cycle length, the effect and ion of reparation are in the soil
Absorption mass transport process it is closely related, for the strong a kind of metal ion wetland soil reparation of adsorption by soil ability effect more
Difference, relies solely on the heavy metal ion in the harvest separation soil of wetland plant, and low separation efficiency is quickly real it is difficult to efficiently
Existing soil remediation.
The content of the invention
The purpose of the present invention is to solve current wetland soil recovery technique repair ability is poor, the cycle is long and separation effect
The problem of rate is low, there is provided a kind of self-generated electricity up-flow wetland contaminated soil remediation device and restorative procedure.
To achieve the above object, the technical solution that the present invention takes is as follows：
A kind of self-generated electricity flows up wetland contaminated soil remediation device, and described device includes wetland pond body, wetland water distribution system, anaerobism
Electric charge collecting region and oxygen Charge scaling precipitate reduction area, recirculated water discharge water pipe, intermediate pool, water circulating pump and Polluted Soil
Earth；
The wetland water distribution system is arranged on the bottom in wetland pond body, and the anaerobism electric charge collecting region is located in wetland pond body
On wetland water distribution system, described and oxygen Charge scaling precipitate reduction area is located in wetland pond body and is located at anaerobism charge-trapping
On area, contaminated soil is filled with the anaerobism electric charge collecting region and simultaneous oxygen Charge scaling precipitate reduction area, it is described to detest
Charge collection electrode in oxygen electric charge collecting region and the Charge scaling precipitate reduction in simultaneous oxygen Charge scaling precipitate reduction area
Electrode is horizontally disposed, and Charge scaling precipitate reduction electrode is connected by external circuit with charge collection electrode；In described
Between pond independently of wetland pond body outside, intermediate pool is connected by water circulating pump with the cloth water conduit tube of wetland water distribution system, in
Between pond water pipe and wetland pond body top discharged by recirculated water communicate；Plantation wetland plant in contaminated soil, the wetland are planted
The root system of thing is located at anaerobism electric charge collecting region.
A kind of method that wetland contaminated soil remediation is realized using above-mentioned device, the method step are as follows：
Step 1：Recirculated water in intermediate pool is lifted into wetland water distribution system by water circulating pump, passes through wetland cloth water system
The bottom united even into wetland pond body, ramps up stream and enters anaerobism electric charge collecting region, to wetland bottom while water distribution uniformity
Portion's contaminated soil is eluted, and the heavy metal ion of elution rises in company with recirculated water flows to facultative Charge scaling reduction deposition
Area；
Step 2：Recirculated water in anaerobism electric charge collecting region participates in the anaerobic reaction of rhizosphere organic matter, hydrolysis acidification, macromolecular
The organic dissolved organic matter for being changed into small molecule of indissoluble, while anaerobism electricity production bacterium produce electric charge, electric charge by charge-trapping electricity
Pole collects and is delivered to external circuit, and Charge scaling precipitate reduction electrode is reached by load resistance；
Step 3：Circulating water flow is passed through through facultative Charge scaling precipitate reduction area, heavy metal ion using charge collection electrode
On Charge scaling reduction depositing electrode reduction reaction occurs for the electric charge that external circuit passes over, and deposits heavy metal, and adsorb
On activated carbon felt surface, the separating beavy metal from contaminated soil；
Step 4：Intermediate pool is discharged into through recirculated water discharge water pipe after recirculated water arrival top layer, completes soil sanitation circulation.
It is of the invention to be relative to the beneficial effect of the prior art：
（1）Wetland soil in the present invention has from anaerobic bacteria to wetland microecosystem multi-cultur es layered combination, can be efficient
Organic matter is decomposed, produces biological electric charge, and by rationally designing charge collection electrode and Charge scaling precipitate reduction electrode, will
The charge transfer of bottom to and oxygen Charge scaling precipitate reduction area, which contains more simultaneous oxygen bacterium, using heavy metal from
Son is used as electron acceptor, participates in reduction reaction, improves soil remediation ability, it is not necessary to increase power supply, realize self-generated electricity, review one's lessons by oneself
Multiple, this is not available for current wetland soil recovery technique.
（2）The charge collection electrode of the present invention uses titanium net composite reactive carbon felt electrode material, forms 3 D stereo electric charge
Body is collected, which has higher specific surface area, can effectively adsorb rhizosphere organic matter in water, while be anaerobism electric charge collecting region
Anaerobism electricity production bacterium provide carrier, improve electricity production and charge collection efficiency.
（3）The present invention elutes the huge sum of money in contaminated soil using water circulating pump driving Hydraulic Circulation flowing, flowing water body
Belong to ion, and promote the mass transfer of heavy metal ion in the soil, be pooled to up to simultaneous oxygen Charge scaling precipitate reduction area, in electric charge
Reallocation precipitate reduction electrode surface is reduced deposition separation, realizes the reparation of soil.
（4）The present invention not only has the advantages that simple in structure, landscape effect is good, but also does not have with known traditional wetland
Technical advantage of the self-produced electroreduction heavy deposition metal ion having without additional power source, is that a kind of creative heavy metal ion is dirty
Contaminate the restorative procedure of soil.
Brief description of the drawings
Fig. 1 flows up wetland contaminated soil remediation device facade layout drawing for self-generated electricity of the present invention；
Fig. 2 is the profile of wetland water distribution system of the present invention.
Embodiment
Technical scheme is further described below in conjunction with the accompanying drawings, but is not limited thereto, it is every to this
Inventive technique scheme technical scheme is modified or replaced equivalently, without departing from the spirit and scope of technical solution of the present invention, should all cover
In protection scope of the present invention.
The present invention is respectively arranged electrode material in the bottom and top layer of known artificial swamp, utilizes the bottom and top of wetland
Electrical potential difference between portion, is arrived bottom collection with external circuit by charge collection electrode and Charge scaling precipitate reduction electrode
Electric charge is directly delivered to top, real in Charge scaling precipitate reduction electrode surface by the use of heavy metal ion as electron acceptor
Now reduction deposition separation.By the water flowed up, the heavy metal ion in washed off soil, and heavy metal ion is promoted in soil
In mass transfer, heavy metal ion is delivered to up to top, it is real to participate in reduction reaction in Charge scaling precipitate reduction electrode surface
The reparation of existing contaminated soil.
Specific electrode reaction of the invention is as follows：
1st, the main electrochemical reaction of anaerobism electric charge collecting region：
C6H12O6 + 6H2O （Microorganism, electricity production bacterium collaboration） → 6CO2 + 24H++24e-
2nd, the main electrochemical reaction in facultative Charge scaling precipitate reduction area：
O2+ 4e- + 4H+→ 2H2O （Oxygen comes from photosynthesis and air reaeration）
M n+（Metal ion）+ ne- → M
3rd, overall reaction：
C6H12O6 + Mn+ + 4O2 + ne- + 4H2O → 6CO2 + 20H+ + 20e- + M
Embodiment one：What present embodiment was recorded is a kind of self-generated electricity up-flow wetland contaminated soil remediation device, described
Device includes wetland pond body 1, wetland water distribution system 2, anaerobism electric charge collecting region 3 and oxygen Charge scaling precipitate reduction area 4, follows
Ring water discharge water pipe 4-2, wetland plant 5, intermediate pool 6, water circulating pump 7 and contaminated soil 8；
The wetland water distribution system 2 is arranged on the bottom in wetland pond body 1, and the anaerobism electric charge collecting region 3 is located at wetland pond body 1
On interior wetland water distribution system 2, described and oxygen Charge scaling precipitate reduction area 4 is located in wetland pond body 1 and is located at anaerobism
On electric charge collecting region 3, filled with pollution in the anaerobism electric charge collecting region 3 and simultaneous oxygen Charge scaling precipitate reduction area 4
Soil 8, charge collection electrode 3-1 in the anaerobism electric charge collecting region 3 with and oxygen Charge scaling precipitate reduction area 4 in electricity
Lotus reallocation precipitate reduction electrode 4-1 is horizontally disposed, and Charge scaling precipitate reduction electrode 4-1 passes through external circuit 3-3 and electricity
Lotus passive electrode 3-1 is connected（The external circuit 3-3 includes copper conductor 3-3-1 and the load resistance 3-3-2 being attached thereto）；Institute
Outside the intermediate pool 6 stated is independently of wetland pond body 1, washing water is provided for contaminated soil, intermediate pool 6 passes through water circulating pump 7
Connected with the cloth water conduit tube 2-1 of wetland water distribution system 2, intermediate pool 6 is discharged water pipe 4-2 by recirculated water and pushed up with wetland pond body 1
Portion communicates；Plantation wetland plant 5, the root system of the wetland plant 5 are located at anaerobism electric charge collecting region 3 in contaminated soil 8.
The organic matter of root system secretion provides nutrition for anaerobic bacteria electricity production, while abundant root system also can efficient absorption heavy metal
Ion, and one of approach of soil remediation.The water circulating pump 7, for lifting recirculated water, makes recirculated water enter wetland bottom
Portion, ensures up-flow flowing, is controlled by flow and lift, elute wetland contaminated soil, promotes the mass transfer of heavy metal in the soil
Efficiently it is diffused into the Charge scaling reduction depositing electrode 4-1 up to cathode.
Embodiment two：A kind of self-generated electricity up-flow wetland contaminated soil remediation dress described in embodiment one
Put, the wetland pond body 1 is rectangle pond body.
Embodiment three：A kind of self-generated electricity up-flow wetland contaminated soil remediation dress described in embodiment one
Put, the wetland water distribution system 2 is by cloth water conduit tube 2-1 and more perforation water distributions being connected with cloth water conduit tube 2-1 horizontal verticals
Branch pipe 2-2 is formed.
Embodiment four：A kind of self-generated electricity up-flow wetland contaminated soil remediation dress described in embodiment one
Put, the charge collection electrode 3-1 is titanium net composite activated carbon felt.
Embodiment five：A kind of self-generated electricity up-flow wetland contaminated soil remediation dress described in embodiment one
Put, the Charge scaling precipitate reduction electrode 4-1 is activated carbon felt.
Embodiment six：A kind of self-generated electricity up-flow wetland contaminated soil remediation dress described in embodiment one
Put, the contaminated soil 8 is heavy metal ion contaminated soil.
Embodiment seven：A kind of device described in using any embodiment in embodiment one to six
The method for realizing wetland contaminated soil remediation, the method step are as follows：
Step 1：Recirculated water in intermediate pool 6 is lifted into wetland water distribution system 2 by water circulating pump 7, passes through wetland water distribution
System 2 ramps up stream and enters anaerobism electric charge collecting region 3, to wet while water distribution uniformity even into the bottom of wetland pond body 1
Ground bottom contaminated soil is eluted, and the heavy metal ion of elution rises in company with recirculated water flows to facultative Charge scaling reduction
Crystallizing field 4；
Step 2：Recirculated water in anaerobism electric charge collecting region 3 participates in the anaerobic reaction of rhizosphere organic matter, and hydrolysis acidification is big to divide
The organic dissolved organic matter for being changed into small molecule of indissoluble of son, while anaerobism electricity production bacterium produces electric charge, electric charge is by charge-trapping
Electrode 3-1 is collected and is delivered to external circuit 3-3, and Charge scaling precipitate reduction electrode 4-1 is reached by load resistance 3-3-2；
Step 3：Circulating water flow utilizes charge collection electrode 3-1 through facultative Charge scaling precipitate reduction area 4, heavy metal ion
Reduced by the electric charge that external circuit 3-3 is passed in Charge scaling and reduction reaction occurs on depositing electrode 4-1, a deposition huge sum of money
Belong to, and adsorb in activated carbon felt surface, the separating beavy metal from contaminated soil；
Step 4：Intermediate pool 6 is discharged into through recirculated water discharge water pipe 4-2 after recirculated water arrival top layer, completes a soil sanitation
Circulation.
Claims (7)
1. a kind of self-generated electricity flows up wetland contaminated soil remediation device, it is characterised in that：Described device includes wetland pond body（1）、
Wetland water distribution system（2）, anaerobism electric charge collecting region（3）And oxygen Charge scaling precipitate reduction area（4）, recirculated water discharge water pipe
（4-2）, intermediate pool（6）, water circulating pump（7）And contaminated soil（8）；
The wetland water distribution system（2）It is arranged on wetland pond body（1）Interior bottom, the anaerobism electric charge collecting region（3）Positioned at wet
Ground pond body（1）Interior wetland water distribution system（2）On, described and oxygen Charge scaling precipitate reduction area（4）Positioned at wetland pond body
（1）It is interior and be located at anaerobism electric charge collecting region（3）On, the anaerobism electric charge collecting region（3）It is heavy with simultaneous oxygen Charge scaling reduction
Shallow lake area（4）Inside it is filled with contaminated soil（8）, the anaerobism electric charge collecting region（3）Interior charge collection electrode（3-1）With simultaneous oxygen
Charge scaling precipitate reduction area（4）Interior Charge scaling precipitate reduction electrode（4-1）Horizontally disposed, Charge scaling is also
Former precipitation electrodes（4-1）Pass through external circuit（3-3）With charge collection electrode（3-1）It is connected；The intermediate pool（6）It is independent
In wetland pond body（1）Outside, intermediate pool（6）Pass through water circulating pump（7）With wetland water distribution system（2）Cloth water conduit tube（2-1）
Connection, intermediate pool（6）Water pipe is discharged by recirculated water（4-2）With wetland pond body（1）Top communicates；Contaminated soil（8）Interior cultivation
Kind wetland plant（5）, the wetland plant（5）Root system be located at anaerobism electric charge collecting region（3）.
A kind of 2. self-generated electricity up-flow wetland contaminated soil remediation device according to claim 1, it is characterised in that：Described
Wetland pond body（1）For rectangle pond body.
A kind of 3. self-generated electricity up-flow wetland contaminated soil remediation device according to claim 1, it is characterised in that：It is described wet
Ground water distribution system（2）By cloth water conduit tube（2-1）With with cloth water conduit tube（2-1）The more perforation water distribution branch pipes that horizontal vertical is connected
（2-2）Composition.
A kind of 4. self-generated electricity up-flow wetland contaminated soil remediation device according to claim 1, it is characterised in that：The electricity
Lotus passive electrode（3-1）For titanium net composite activated carbon felt.
A kind of 5. self-generated electricity up-flow wetland contaminated soil remediation device according to claim 1, it is characterised in that：The electricity
Lotus reallocation precipitate reduction electrode（4-1）For activated carbon felt.
A kind of 6. self-generated electricity up-flow wetland contaminated soil remediation device according to claim 1, it is characterised in that：Described
Contaminated soil（8）It is heavy metal ion contaminated soil.
7. a kind of method that device using described in claim 1-6 any claims realizes wetland contaminated soil remediation, its
It is characterized in that：The method step is as follows：
Step 1：Intermediate pool（6）Interior recirculated water passes through water circulating pump（7）It is lifted into wetland water distribution system（2）, by wet
Ground water distribution system（2）Even into wetland pond body（1）Bottom, ramp up stream enter anaerobism electric charge collecting region（3）, in uniform cloth
Wetland bottom contaminated soil is eluted while water, the heavy metal ion of elution rises in company with recirculated water flows to facultative electricity
Lotus, which is reallocated, reduces crystallizing field（4）；
Step 2：In anaerobism electric charge collecting region（3）The anaerobic reaction of interior recirculated water participation rhizosphere organic matter, hydrolysis acidification, greatly
The organic dissolved organic matter for being changed into small molecule of the indissoluble of molecule, while anaerobism electricity production bacterium produces electric charge, electric charge is received by electric charge
Collector（3-1）Collection is delivered to external circuit（3-3）, pass through load resistance（3-3-2）Reach Charge scaling precipitate reduction electricity
Pole（4-1）；
Step 3：Circulating water flow is through facultative Charge scaling precipitate reduction area（4）, heavy metal ion utilizes charge collection electrode
（3-1）Pass through external circuit（3-3）The electric charge passed over reduces depositing electrode in Charge scaling（4-1）It is upper that reduction occurs instead
Should, heavy metal is deposited, and adsorb in activated carbon felt surface, the separating beavy metal from contaminated soil；
Step 4：After recirculated water arrival top layer water pipe is discharged through recirculated water（4-2）It is discharged into intermediate pool（6）, complete a soil
Decontamination cycle.
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| 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 |
| CN109719122A (en) * | 2019-01-17 | 2019-05-07 | 长沙理工大学 | The processing method and processing device of heavy metal ion in a kind of removal soil (water body) with adsorbent |
| CN110681682A (en) * | 2019-09-25 | 2020-01-14 | 天津大学 | Adsorption type bioelectrode-permeable reaction well system and construction method thereof |
| CN114472496A (en) * | 2022-01-26 | 2022-05-13 | 中国葛洲坝集团生态环境工程有限公司 | Pretreatment system for reducing water content and heavy metal content of polluted soil |
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| CN109332373A (en) * | 2018-12-14 | 2019-02-15 | 浙江中地净土科技有限公司 | A kind of convertible device of the electro reclamation of heavy-metal contaminated soil |
| 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 |
| CN109719122A (en) * | 2019-01-17 | 2019-05-07 | 长沙理工大学 | The processing method and processing device of heavy metal ion in a kind of removal soil (water body) with adsorbent |
| CN110681682A (en) * | 2019-09-25 | 2020-01-14 | 天津大学 | Adsorption type bioelectrode-permeable reaction well system and construction method thereof |
| CN110681682B (en) * | 2019-09-25 | 2021-06-08 | 天津大学 | Adsorption type bioelectrode-permeable reaction well system and construction method thereof |
| CN114472496A (en) * | 2022-01-26 | 2022-05-13 | 中国葛洲坝集团生态环境工程有限公司 | Pretreatment system for reducing water content and heavy metal content of polluted soil |
| CN114472496B (en) * | 2022-01-26 | 2023-07-14 | 葛洲坝集团生态环保有限公司 | Pretreatment system for reducing water content and heavy metal content of polluted soil |
| CN114873713A (en) * | 2022-05-11 | 2022-08-09 | 哈尔滨工业大学 | System and method for treating cold-rolled pickling wastewater of steel mill by built-in composite electrode of artificial wetland |
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