CN203862665U - MFC device for in-situ remediation of heavy-metal hexavalent chromium contaminated soil - Google Patents
MFC device for in-situ remediation of heavy-metal hexavalent chromium contaminated soil Download PDFInfo
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- CN203862665U CN203862665U CN201420221484.8U CN201420221484U CN203862665U CN 203862665 U CN203862665 U CN 203862665U CN 201420221484 U CN201420221484 U CN 201420221484U CN 203862665 U CN203862665 U CN 203862665U
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Abstract
The utility model discloses an MFC device for in-situ remediation of heavy-metal hexavalent chromium contaminated soil, and is used for the field of soil contamination remediation. The MFC device comprises an anode assembly and a cathode assembly, wherein the anode assembly and the cathode assembly are separated from each other, buried in the contaminated soil, and connected with each other through a conducting wire; diaphragms are arranged on the cathode assembly in an attached manner. When the MFC device is in use, the anode assembly and the cathode assembly are buried in the contaminated soil respectively, the anode assembly locally utilizes organic materials in the soil as fuels, electrons generated reach the cathode assembly through anodes and the conducting wire to deoxidize the heavy-metal hexavalent chromium adsorbed by the cathode assembly, so as to promote degradation and conversion of heavy-metal hexavalent chromium pollutants in the soil and realize the in-situ remediation of the heavy-metal hexavalent chromium contaminated soil. The MFC device dispenses with the technical schemes of a single-chamber type (air cathodes) and a double-chamber type in the prior art, adopts the in-situ remediation technology, and is lower in manufacturing cost, free of aeration energy consumption and convenient to use; the cathode assembly and the anode assembly can be combined for optimization according to the actual condition.
Description
Technical field
The utility model is repaired field for soil pollution, particularly relates to the MFC device of the hexavalent chromium polluted soil of a kind of original position remediating heavy metal.
Background technology
Along with the develop rapidly of modern industry, the main production and the technique that produce pollution of chromium have related to multiple fields such as metallurgy, chemical industry, agricultural, medical science, in above-mentioned industrial production, all can produce containing chromium " three wastes ".Chromium mainly exists in environment with Cr (III) and two kinds of forms of Cr (VI), and it is relatively stable that Cr (III) compares Cr (VI), and toxicity is also relatively little.A large amount of chromium entered environments extended residual, in environment, by geochemical process polluted underground water, pollute the whole ecosystem, particularly Agro-ecological System by biogeochemical process, endanger the health of animals and human beings class by food chain.
In current soil pollution recovery technique, be mainly divided into original position reparation and soil moved in to improve the original method.Soil moved in to improve the original method instant effect, but easily cause secondary pollution.Soil in-situ reparation can be avoided secondary pollution problem, is subject in recent years strong interest.Simultaneously, the improvement method of existing contaminated soil, as all there is in various degree the technical problem that is difficult to overcome in Physical, chemical method, bioanalysis etc., the soil remediation technology that multiple recovery technique is combined will become the main direction of studying of soil remediation from now on, the eco-chemical remediation technology wherein chemistry being combined with bioanalysis is the new method in recent years proposing, and is the developing direction of 21st century contaminated soil recovery technique.
Microbiological fuel cell (MFC) is by living beings in anodic oxidation, electronics to be passed to the device that cathode electronics acceptor reduces simultaneously, possesses electrogenesis and organic matter and disposes double effects.The operation principle of MFC is: the microbiological anaerobic that various organic matters are had electro-chemical activity in anaerobism anode chamber is oxidized, the electronics producing is passed to galvanic anode by microorganism, arrive negative electrode by external circuit again, thereby at external circuit generation current, anode chamber's proton arrives negative electrode, generate water with the oxidant reaction such as oxygen, thereby form a complete loops.
The electrode of MFC as electron acceptor for promoting hexavalent chromium polluted reduction that a new thinking is provided, be that electrode insertion is as low cost, easy care electron acceptor, the electronics that microbiological oxidation organic matter is produced is passed to negative electrode and Cr VI reaction by anode and external circuit, accelerates the deoxidization, degradation detoxification of negative electrode hexavalent chromium pollutant.One of committed step of utilizing the hexavalent chromium polluted method of MFC original position degraded soil is that MFC configuration is designed, make the electronics of anode microbiological oxidation Organic Pollution deposits yields arrive negative electrode and Cr VI reaction by anode and external circuit, thereby accelerate degraded and the conversion of heavy metal-polluted soil hexavalent chromium pollutant.
At present, MFC is mainly divided into two types of single chamber type (air cathode) and double chamber types.Two chamber MFC, than single chamber MFC complex structure, need negative electrode to have more electron acceptor to improve cathode reaction speed, and single chamber MFC structure are relatively simple.Both are each has something to recommend him in the concrete application such as electrogenesis, contaminant degradation conversion, all have very large room for promotion.
Current disclosed MFC is mostly for anode Disposal of Contaminants, mostly be the organic pollution fuel that can be utilized by microorganism, mainly comprise organic wastewater, the human and animal excreta etc. of municipal wastewater, factory's discharge, but have not been reported for the chromic MFC of cathode pollutant, particularly heavy metal element as electron acceptor.In addition, soil is difficult to suction or pumps into MFC cathode chamber, does not reach the object of contaminated soil in-situ treatment and reparation, and therefore traditional MFC device is also not suitable for in-situ treatment heavy metal pollution of soil thing Cr VI.
Utility model content
For addressing the above problem, the utility model provides a kind of MFC device that can the hexavalent chromium polluted soil of original position remediating heavy metal.
The utility model solves the technical scheme that its technical problem adopts: the MFC device of the hexavalent chromium polluted soil of a kind of original position remediating heavy metal, comprise anode group and cathode sets, be attached at described cathode sets and be provided with barrier film, described anode group is spaced from each other to be embedded in contaminated soil and by wire with cathode sets and is connected.
Be further used as the improvement of technical solutions of the utility model, described anode group comprises some bar-shaped anode monomers, and each described anode monomer forms anode group by wire conducting.
Be further used as the improvement of technical solutions of the utility model, described anode monomer is graphite rod or carbon fiber felt.
Be further used as the improvement of technical solutions of the utility model, described cathode sets comprises some tabular negative electrode monomers, so that increase the contact-making surface of film negative electrode monomer and electron acceptor, the one or two sides that is attached at described negative electrode monomer is provided with barrier film, and each described negative electrode monomer forms cathode sets by wire conducting.
Be further used as the improvement of technical solutions of the utility model, described negative electrode monomer is carbon fiber felt or carbon fiber brush or graphite granule or carbon cloth.
Be further used as the improvement of technical solutions of the utility model, described barrier film is anion/cation exchange membrane or high strength microporous filter cloth.
The beneficial effects of the utility model: this device in use, respectively anode group and cathode sets are embedded in contaminated soil, organic matter in anode group local use soil is as fuel, the electronics producing arrives cathode sets by anode and wire, the heavy metal Cr VI that is adsorbed on cathode sets is reduced, thereby to promote degraded and the conversion of heavy metal-polluted soil hexavalent chromium pollutant, realize the original position reparation of Cr VI heavy-metal contaminated soil.The utility model is abandoned the technical scheme of two types of single chamber type in prior art (air cathode) and double chamber types, and cost is lower, and without ventilation power consumption, cathode sets and anode group can be carried out Combinatorial Optimization according to actual conditions, easy to use.
Brief description of the drawings
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is the utility model example structure schematic diagram;
Fig. 2 is the utility model chromic actual effect figure that degrades.
Detailed description of the invention
With reference to Fig. 1, the utility model provides the MFC device of the hexavalent chromium polluted soil of a kind of original position remediating heavy metal, comprises anode group 1 and cathode sets 2, and described anode group 1 is spaced from each other to be embedded in contaminated soil and by wire 3 with cathode sets 2 and is connected.Described anode group 1 comprises some bar-shaped anode monomers 11, and described anode monomer 11 is graphite rod or carbon fiber felt.Each described anode monomer 11 forms anode group 1 by wire 3 conductings.Described cathode sets 2 comprises some tabular negative electrode monomers 21, and described negative electrode monomer 21 is carbon fiber felt or carbon fiber brush or graphite granule or carbon cloth.The one or two sides that is attached at described negative electrode monomer 21 is provided with barrier film, and each described negative electrode monomer 21 forms cathode sets 2 by wire 3 conductings.Described barrier film is anion/cation exchange membrane or high strength microporous filter cloth.
With reference to Fig. 2, the cathode sets of edaphon fuel cell of the present utility model 2 and anode group 1 are all embedded in contaminated soil, connect by wire 3.Artificial initial content of 6-valence Cr ions to 100 mg/L of flooded soils that regulates, arranges and is treated to blank without MFC, imbed MFC but open-circuit condition in contrast.Through three days, in space management, content of 6-valence Cr ions declined less than 10 mg/L, and control treatment has declined approximately 30%, and under 3 days states of the normal operation of battery, in soil, Cr VI has dropped to approximately 55 mg/L.In addition, process through 15 days, in space management, Cr VI has declined approximately 15%, has declined approximately 40%, and has normally moved in Battery disposal, almost whole Degradation and Transformation of soil Cr VI in contrast.The utility model is abandoned the technical scheme of two types of single chamber type in prior art (air cathode) and double chamber types by above-mentioned design, adopt original position renovation technique, cost is lower, without ventilation power consumption, cathode sets 2 and anode group 1 can be carried out Combinatorial Optimization according to actual conditions, easy to use.
Certainly, the invention is not limited to above-mentioned embodiment, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to the utility model spirit, and the modification that these are equal to or replacement are all included in the application's claim limited range.
Claims (6)
1. a MFC device for the hexavalent chromium polluted soil of original position remediating heavy metal, is characterized in that: comprise anode group and cathode sets, be attached at described cathode sets and be provided with barrier film, described anode group is spaced from each other to be embedded in contaminated soil and by wire with cathode sets and is connected.
2. the MFC device of the hexavalent chromium polluted soil of original position remediating heavy metal according to claim 1, is characterized in that: described anode group comprises some bar-shaped anode monomers, and each described anode monomer forms anode group by wire conducting.
3. the MFC device of the hexavalent chromium polluted soil of original position remediating heavy metal according to claim 2, is characterized in that: described anode monomer is graphite rod or carbon fiber felt.
4. the MFC device of the hexavalent chromium polluted soil of original position remediating heavy metal according to claim 1, it is characterized in that: described cathode sets comprises some tabular negative electrode monomers, the one or two sides that is attached at described negative electrode monomer is provided with barrier film, and each described negative electrode monomer forms cathode sets by wire conducting.
5. the MFC device of the hexavalent chromium polluted soil of original position remediating heavy metal according to claim 4, is characterized in that: described negative electrode monomer is carbon fiber felt or carbon fiber brush or graphite granule or carbon cloth.
6. the MFC device of the hexavalent chromium polluted soil of original position remediating heavy metal according to claim 4, is characterized in that: described barrier film is anion/cation exchange membrane or high strength microporous filter cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420221484.8U CN203862665U (en) | 2014-04-30 | 2014-04-30 | MFC device for in-situ remediation of heavy-metal hexavalent chromium contaminated soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420221484.8U CN203862665U (en) | 2014-04-30 | 2014-04-30 | MFC device for in-situ remediation of heavy-metal hexavalent chromium contaminated soil |
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| CN203862665U true CN203862665U (en) | 2014-10-08 |
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| CN201420221484.8U Expired - Fee Related CN203862665U (en) | 2014-04-30 | 2014-04-30 | MFC device for in-situ remediation of heavy-metal hexavalent chromium contaminated soil |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689387A (en) * | 2016-03-30 | 2016-06-22 | 中国石油大学(华东) | Method for restoring combined pollution soil through electrodynamic force-fuel cell coupling device |
| CN106623398A (en) * | 2016-10-15 | 2017-05-10 | 太原理工大学 | Ferric salt strengthened electrokinetic remediation device for heavy metal pollution in e-waste dismantling place |
| CN107377608A (en) * | 2017-07-18 | 2017-11-24 | 常州大学 | It is a kind of efficiently to remove Cr in acid soil6+Microbial fuel cell unit and method |
| CN107716539A (en) * | 2017-11-02 | 2018-02-23 | 盐城工学院 | A kind of device of renovation of organic pollution soil |
| CN108704933A (en) * | 2018-04-26 | 2018-10-26 | 中国石油大学(北京) | A kind of device and method of the hexavalent chromium polluted soil of in-situ immobilization |
| CN110967388A (en) * | 2018-09-30 | 2020-04-07 | 深圳市北京大学深圳研究院分析测试中心有限公司 | Soil heavy metal in-situ monitor |
| CN112296080A (en) * | 2020-09-28 | 2021-02-02 | 东南大学 | Microbial fuel cell system for removing and recovering heavy metals in soil |
-
2014
- 2014-04-30 CN CN201420221484.8U patent/CN203862665U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689387A (en) * | 2016-03-30 | 2016-06-22 | 中国石油大学(华东) | Method for restoring combined pollution soil through electrodynamic force-fuel cell coupling device |
| CN105689387B (en) * | 2016-03-30 | 2018-08-31 | 中国石油大学(华东) | A kind of method that electric power-fuel cell coupling device repairs combined contamination soil |
| CN106623398A (en) * | 2016-10-15 | 2017-05-10 | 太原理工大学 | Ferric salt strengthened electrokinetic remediation device for heavy metal pollution in e-waste dismantling place |
| CN107377608A (en) * | 2017-07-18 | 2017-11-24 | 常州大学 | It is a kind of efficiently to remove Cr in acid soil6+Microbial fuel cell unit and method |
| CN107716539A (en) * | 2017-11-02 | 2018-02-23 | 盐城工学院 | A kind of device of renovation of organic pollution soil |
| CN108704933A (en) * | 2018-04-26 | 2018-10-26 | 中国石油大学(北京) | A kind of device and method of the hexavalent chromium polluted soil of in-situ immobilization |
| CN108704933B (en) * | 2018-04-26 | 2020-09-11 | 中国石油大学(北京) | Device and method for in-situ remediation of hexavalent chromium contaminated soil |
| CN110967388A (en) * | 2018-09-30 | 2020-04-07 | 深圳市北京大学深圳研究院分析测试中心有限公司 | Soil heavy metal in-situ monitor |
| CN112296080A (en) * | 2020-09-28 | 2021-02-02 | 东南大学 | Microbial fuel cell system for removing and recovering heavy metals in soil |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20210430 |