CN109261713A - A kind of method that plant-microorganism fuel cell stops the circulation of soil nano particle source metal ion - Google Patents
A kind of method that plant-microorganism fuel cell stops the circulation of soil nano particle source metal ion Download PDFInfo
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- CN109261713A CN109261713A CN201810948566.5A CN201810948566A CN109261713A CN 109261713 A CN109261713 A CN 109261713A CN 201810948566 A CN201810948566 A CN 201810948566A CN 109261713 A CN109261713 A CN 109261713A
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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
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/16—Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses a kind of methods that plant-microorganism fuel cell stops the circulation of soil nano particle source metal ion, the following steps are included: 1) P-MFC is arranged: cathode plate is arranged in water and soil intersection, anode plate is arranged in the soil, conducting wire is connected to water and soil interface or more between yin-yang two-plate, external resistance box, the water plant being in a good state of health is planted, root penetrates anode；2) biomembrane is cultivated: control temperature and illumination；Daily Timing measurement record current, voltage, illustrate that anode biomembrane has grown up to when Current Voltage keeps relative stability；3) P-MFC is integrally put into the soil by the heavy metal pollution of nano particle source after biomembrane grows up to and is run.The method of the present invention is established on the basis of edaphon and plant ecological alternate cooperate, and the intensified ecological suitable for nano particle source metal ion pollution is administered and the technology green is sustainable.
Description
Technical field
A kind of present invention, and in particular to plant-microorganism fuel cell obstruction soil nano particle source metal ion circulation
Method.
Background technique
Plant-microorganism fuel cell (P-MFC) is utilized in solar energy degradation water by plant and microbial association or soil
Secretions from plant roots produces electricl energy in turn in earth, and the electronics of generation is consumed by external circuit to cathodic region from anode, instead
Organic matter be degraded by microorganisms through electrochemical reaction.
Nano zine oxide is that a kind of extensive stream is stored in soil system and to the higher heavy metal of environmental and human health impacts toxicity
Source, due to its highly dissoluble, mobility and the toxicity of itself, the removal in soil remediation field is a significant challenge.Soil
The metal ion that the transmitting of extracellular microbial exoelectron and cathode electronics transfer may be gone back in native soil in earth subtracts to realize immobilization
The possibility of few its environment circulation, mechanism are shown in attached drawing 1.
Current most of researchs about P-MFC, which are laid particular emphasis on, to improve efficiency of transmission or reduces P-MFC internal resistance to obtain
More energy or nutriment, and the research in terms of removing pollutant is limited, wherein the information of repairing heavy metal pollution is very
It is few.
Summary of the invention
The purpose of the present invention is to provide a kind of plant-microorganism fuel cells to stop soil nano particle source metal ion
The method of circulation, to overcome the problems of the above-mentioned prior art, the present invention solves heavy metal pollution of soil by building P-MFC
Problem, P-MFC play good obstruction effect to the nano granular of zinc oxide of exposure in soil.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of method that plant-microorganism fuel cell stops the circulation of soil nano particle source metal ion, including it is following
Step:
(1) P-MFC is set: loading air-dry soil in a reservoir, then add water to and flood soil surface, in water and soil intersection
Cathode plate is set, and in the soil by anode plate setting, conducting wire is connected to water and soil interface or more, and external electricity between yin-yang two-plate
The water plant of health is planted in resistance in the soil, and the root growth of water plant is to penetrating anode；
(2) biomembrane is cultivated: control P-MFC temperature and light application time, the electric current and electricity of daily Timing measurement record P-MFC
Pressure turns out anode biomembrane when voltage is greater than 50mV, and electric current is greater than 120mA；
(3) P-MFC is integrally embedded in the soil by the heavy metal pollution of nano particle source and is run, soil is received to realize
The obstruction of rice grain source metal ion.
Further, soil surface waterflooding 1-2mm.
Further, the cathode plate and anode plate are electrically conductive graphite felt.
Further, cathode board size 3cm × 10cm × 0.5cm, anode board size 10cm × 10cm × 0.5cm.
Further, the anode plate is one piece or two pieces, and when anode plate is one piece, anode plate is arranged under cathode plate
In soil at the vertical distance 3cm of side；When anode plate be two pieces when, anode plate be arranged on the downside of cathode plate vertical distance 3cm and
In soil at 6cm.
Further, the resistance value of outer connecting resistance is 1000 Ω.
Further, the water plant is Spathiphyllum kochii.
Further, control P-MFC temperature is 26 ± 1 DEG C in step (2), and daily light application time is at least in 100lux light
It is lower irradiation 10 hours strong.
Compared with prior art, the invention has the following beneficial technical effects:
The method of the present invention is established on the basis of edaphon and plant ecological cooperate, and nano particle source metal is suitable for
The intensified ecological of ionic soil is administered.The soil for the P-MFC application nano particle source metal ion pollution that the present invention is constructed, can
To find that P-MFC plays good obstruction effect to the nano particle source metal ion of exposure in soil, it is mainly trapped in soil
Upper layer (5-10cm) makes it, and layer does not migrate still further below, facilitates subsequent showering and metal recovery.It stops principle and is plant
By photosynthesis by the carbon dioxide conversion in air at organic matter, wherein most organic matter is by plant root exudation to root
In the environment of border.Under the action of electricity-producing microorganism, these substances are converted into electronics, proton and carbon dioxide, anode biomembrane
Microorganism electronics cross-cell membrane can be passed into anode in several ways, electronics is transferred to cathode, yin-yang two-stage by conducting wire
Between form potential difference, generate electric current, and exposed nano zine oxide is stopped near cathode.It is micro- by plant-in the process
Biological fuel cell promotes edaphon inter-species electronics transfer and microbe-metal interionic electron transfer efficiency, wherein one
Part electronics is directly used in the reduction passivation of low-cost electronic；Simultaneously because the breathing of extracellular microbial exoelectron is strengthened under P-MFC environment
Caused microbial metabolic activity enhancing, is passivated nano particle source metal ion by the alienation metal reduction of microorganism and expands
It dissipates.The P-MFC constructed under this method will not influence plant growth and edaphon enzyme activity, and Initial stage of culture electric current is with plant
Fast growing increases, and supplies in the process without external energy and extra nutritional liquid, and the promotion of Ecological Distribution of Soil Microorganisms recovery dynatron effect is bright
It is aobvious, belong to environmentally friendly bioremediation technology.
Detailed description of the invention
Fig. 1 is P-MFC passive metal ionic mechanism figure；
Fig. 2 is five groups of device configuration pictures, wherein (a) is control setting；(b) it is arranged to there is plant to compare；It (c) is single anode
P-MFC setting；(d) it is arranged for double anode P-MFC；(e) it is arranged for list anode soil MFC；(a) (b) (c) (d) (e) is respectively corresponded
No. 1 device, No. 2 devices, No. 3 devices, No. 4 devices and No. 5 devices；
Fig. 3 be five groups of devices each soil layer zinc concentration comparison diagram, (a), (b), (c), (d) be respectively non-centrifugal water leaching,
It is not centrifuged weak acid leaching after water leaching, centrifugation after weak acid leaching, centrifugation；
Fig. 4 is each plant tissue's biomass accounting figure；
Fig. 5 is each plant AEA antioxidant system enzyme activity comparison diagram；
Fig. 6 is the edaphon enzyme activity comparison diagram of five groups of devices, and (a), (b) are respectively edaphon FDAH, DH living
Property；
Fig. 7 is that efficiency figure is produced electricity in P-MFC operational process, and (a), (b) are respectively electric current, voltage change.
Specific embodiment
Embodiments of the present invention are described in further detail below:
A kind of method that plant-microorganism fuel cell stops the circulation of soil nano particle source metal ion, including it is following
Step:
1. P-MFC is arranged: cathode plate is arranged in water and soil intersection, and anode plate is arranged in the soil, conducting wire between yin-yang two-plate
It is connected to water and soil interface or more, external resistance box plants the Spathiphyllum kochii being in a good state of health, and root penetrates anode；Electrode material
The high-purity high temperature resistant graphite felt of material selection, cathode board size 3cm × 10cm × 0.5cm, anode board size 10cm × 10cm ×
0.5cm, anode plate are one piece or two pieces, and when anode plate is one piece, anode plate setting is on the downside of the cathode plate at vertical distance 3cm
Soil in；When anode plate is two pieces, anode plate is arranged in the soil on the downside of cathode plate at vertical distance 3cm and 6cm, outside
1000 Ω of power-up resistance；
2. cultivating biomembrane: control temperature and illumination maintain 26 ± 1 DEG C of temperature to arrive late 6 points of illumination early at 8 points；
Daily Timing measurement record current, voltage illustrate that anode biomembrane is long when voltage is greater than 50mV, and electric current is greater than 120mA
At；
3. P-MFC is integrally put into the soil by the heavy metal pollution of nano particle source after growing up to and is run by biomembrane；
4. the sampled point periodic sampling near pole plate assesses metallic ion passivation effect and inspects periodically replacement anode plate.
Below with reference to embodiment, the invention will be described in further detail:
A kind of method that plant-microorganism fuel cell stops the circulation of soil nano particle source metal ion:
1. P-MFC is arranged: being filled in internal diameter 15cm, high 15cm after crossing 2mm sieve after taking rice soil topsoil 1.4kg to air-dry
In transparent glass column, soil surface waterflooding 1-2mm is kept；Electrode material chooses high-purity high temperature resistant graphite felt, having a size of 3cm ×
The cathode plate setting of 10cm × 0.5cm is arranged having a size of 10cm × 10cm × 0.5cm anode plate in cathode in water and soil intersection
Below plate in the soil at the place 3cm (single anode), (double anode) setting is below the cathode plate at 3cm and at 6cm, between yin-yang two-plate
Copper conductor be connected to water and soil interface or more, external 1000 Ω of resistance box；The Spathiphyllum kochii being in a good state of health is planted, root is worn
Saturating anode plate；Five groups of devices: two groups of P-MFC (mono-/bis-anode), three groups of controls (pure soil, soil and plant, soil and resistance are set altogether
Case), specific configuration is shown in attached drawing 2；
2. cultivating biomembrane: 26 ± 1 DEG C of temperature being maintained to arrive late 6 points of illumination early at 8 points；Daily Timing measurement record
Electric current, voltage illustrate that anode biomembrane has grown up to when voltage is greater than 50mV, and electric current is greater than 120mA；
After 3. biomembrane grows up to, five parts of 700mg nano zine oxides of precise (Shanghai steps female chemical industry) difference ultrasonic disperse
In 1L water and it is added in five groups of devices；
4. after device continuous service 25 days, four layers of soil sample point is dug out, soil sample, pole near anode upper and lower level and cathode
Plate, plant each section do not sample, and 4 DEG C stored refrigerated for follow-up test；
5. Direct spectrophotometry: being respectively that leachate prepares soil extraction with water and weak acid (Simulated Acid Rain, pH=4), by institute
It obtains leaching liquor and is divided into two parts, a part carries out ultracentrifugation, and another part is not centrifuged, and ICP-AES measures zinc concentration, each soil layer
Five groups of zinc concentration differences are shown in attached drawing 3；
6. phytomass and enzyme activity determination: taking the root, stem, leaf of Spathiphyllum kochii to observe and measure, weigh respectively, each plant group
It knits biomass accounting and sees attached drawing 4, AEA antioxidant system enzyme activity is shown in attached drawing 5；
7. edaphon enzyme assay: measuring five groups of fluorescein(e) diacetate hydrolase (FDAH) and dehydrogenation respectively
Enzyme (DH) activity, each three groups parallel, sees attached drawing 6；
8. electricity production measures of effectiveness: aggregating electric current, voltage change, see attached drawing 7；
9. the result shows that: (1) zinc ion inhibiting rate up to 57% or so, and nano zine oxide is mainly trapped on soil
Layer；(2) in P-MFC operational process, compared with the control, Spathiphyllum kochii biomass, leaf blade size color, root length, AEA antioxygen
Change system enzyme activity is without significant change；(3) building of P-MFC does not influence edaphon enzymatic activity；(4) it can be held after P-MFC operation
Continuous electricity production, electric current is basically stable at 300uA or more after 20 days, the electricity generation performance with higher compared with the MFC of no plant；Single layer
Anode and bilayer anode are on electricity generation performance without significant difference.In summary as a result, P-MFC to soil nano particle source metal from
Son has good obstruction effect, reduces its environment circulation effect, illustrates that this method can effectively administer nano particle source metal ion
It pollutes and green is sustainable.
Claims (8)
1. a kind of method that plant-microorganism fuel cell stops the circulation of soil nano particle source metal ion, which is characterized in that
The following steps are included:
(1) P-MFC is set: loading air-dry soil in a reservoir, then add water to and flood soil surface, is arranged in water and soil intersection
Cathode plate, in the soil by anode plate setting, conducting wire is connected to water and soil interface or more, and outer connecting resistance between yin-yang two-plate,
The water plant of health is planted in the soil, and the root growth of water plant is to penetrating anode；
(2) biomembrane is cultivated: control P-MFC temperature and light application time, the electric current and voltage of daily Timing measurement record P-MFC,
When voltage is greater than 50mV, and electric current is greater than 120mA, that is, turn out anode biomembrane；
(3) P-MFC is integrally embedded in the soil by the heavy metal pollution of nano particle source and is run, to realize to soil nanometer
The obstruction of grain source metal ion.
2. a kind of plant-microorganism fuel cell according to claim 1 stops soil nano particle source metal ion stream
The method turned, which is characterized in that soil surface waterflooding 1-2mm.
3. a kind of plant-microorganism fuel cell according to claim 1 stops soil nano particle source metal ion stream
The method turned, which is characterized in that the cathode plate and anode plate are electrically conductive graphite felt.
4. a kind of plant-microorganism fuel cell according to claim 1 stops soil nano particle source metal ion stream
The method turned, which is characterized in that cathode board size 3cm × 10cm × 0.5cm, anode board size 10cm × 10cm × 0.5cm.
5. a kind of plant-microorganism fuel cell according to claim 1 stops soil nano particle source metal ion stream
The method turned, which is characterized in that the anode plate is one piece or two pieces, and when anode plate is one piece, anode plate is arranged in cathode
In soil on the downside of plate at vertical distance 3cm；When anode plate is two pieces, vertical distance is arranged on the downside of cathode plate in anode plate
In soil at 3cm and 6cm.
6. a kind of plant-microorganism fuel cell according to claim 1 stops soil nano particle source metal ion stream
The method turned, which is characterized in that the resistance value of outer connecting resistance is 1000 Ω.
7. a kind of plant-microorganism fuel cell according to claim 1 stops soil nano particle source metal ion stream
The method turned, which is characterized in that the water plant is Spathiphyllum kochii.
8. a kind of plant-microorganism fuel cell according to claim 1 stops soil nano particle source metal ion stream
The method turned, which is characterized in that control P-MFC temperature is 26 ± 1 DEG C in step (2), and daily light application time is at least
It is irradiated 10 hours under 100lux light intensity.
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Cited By (5)
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| CN111430766A (en) * | 2020-04-01 | 2020-07-17 | 广东工业大学 | Anode photosynthetic solar fuel cell system with additional degradation strain and application thereof |
| CN111430764A (en) * | 2020-04-01 | 2020-07-17 | 广东工业大学 | Pseudomonas-anode photosynthetic solar fuel cell system and preparation method and application thereof |
| CN112514768A (en) * | 2020-11-16 | 2021-03-19 | 湖北三峡职业技术学院 | Method for reducing rice to absorb heavy metal in soil by soil microbial fuel cell |
| CN113877959A (en) * | 2021-10-11 | 2022-01-04 | 中国计量大学 | Method for repairing polycyclic aromatic hydrocarbon polluted soil by using plant microbial fuel cell technology |
| CN114653742A (en) * | 2022-03-02 | 2022-06-24 | 中国科学院沈阳应用生态研究所 | Method for optimizing ex-situ stabilization treatment scheme of heavy metal contaminated soil in efficiency evaluation mode |
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Application publication date: 20190125 |