CN204934196U - One can remove the cationic bipolar membrane electrolytic cell of heavy metal in soil - Google Patents
One can remove the cationic bipolar membrane electrolytic cell of heavy metal in soil Download PDFInfo
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- CN204934196U CN204934196U CN201520549275.0U CN201520549275U CN204934196U CN 204934196 U CN204934196 U CN 204934196U CN 201520549275 U CN201520549275 U CN 201520549275U CN 204934196 U CN204934196 U CN 204934196U
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Abstract
The utility model relates to a kind of environmental pollution improvement equipment technical field, and particularly one can remove the cationic bipolar membrane electrolytic cell of heavy metal in soil.Bipolar membrane electrolytic cell involved by the utility model, it is characterized in that between anode and anion-exchange membrane, be provided with multiple soil treatment unit be made up of Bipolar Membrane and cation-exchange membrane, thus electrolytic cell being divided into anode chamber, soil treating chamber, hydroecium, cathode chamber, is soil treating chamber between anode and anion-exchange membrane.The electrolytic cell that the utility model builds, without the need to outer acid adding, has saved cost; The oxygen radical ion reaction precipitation that heavy metal cation can produce with water decomposition and removing; Can connect, by a pair multiple soil treating chamber of yin, yang Electrode treatment, thus improve current efficiency and electric slot space utilization rate, reduce energy consumption and cost.
Description
Technical field
The utility model relates to a kind of environmental pollution improvement equipment technical field, and particularly one can remove the cationic bipolar membrane electrolytic cell of heavy metal in soil.
Background technology
The thorny environmental problem that heavy metal pollution of soil has become global owing to having disguise, chronicity and irreversibility.China's heavy metal pollution cultivated area about has 2500hm
2, cause grain drop in production more than 1,000 ten thousand tons every year, pollute more than 1,200 ten thousand tons, grain, economic loss more than 200 hundred million yuan.The U.S.'s " immigrant and refugee study " journals report, from content of beary metal such as lead, cadmium, mercury in China's Mainland immigrant blood higher than the immigrant of other areas, wherein lead exceeds 44%.The improvement of heavy metal contaminated soil, more and more attracts widespread attention now, and for this reason, numerous Test And Research Works has been carried out in countries in the world.
At present, the method of domestic and international process heavy metal pollution of soil mainly contains: 1) soil moved in improve the original method: by uncontamination soil displacement contaminated soil, the method needs a large amount of human and material resources and financial resources, and soil restoration needs the long period, and the soil cemented out exists secondary pollution problem.2) elution method: generally use sour drip washing, need a large amount of acid solutions, thus a large amount of sewage can be produced, and easily cause the pollution of underground water.3) electronic chemical method: heavy metal, under DC Electric Field, migrates to ate electrode, then removed by other method, energy consumption is larger.4) phytoremediation: plant is little, processing speed is slow, and plant tall and big heavy metal tolerance is poor.5) microorganism remediation method: timeliness is slow, condition of culture is harsh, and microorganism difficulty survives.Monotechnics has its limitation, cannot be promoted in actual applications.
Bipolar Membrane is a kind of novel ion-exchange composite membranes, utilize the soil of Bipolar membrane water splitting repairing heavy metal pollution, there is current efficiency and electric slot space utilization rate is high, electrode surface side reaction is few, energy consumption is low, without the need to additional a large amount of acid solution, do not produce the advantages such as secondary pollution.It is that Bipolar Membrane is under DC electric field effect that Bipolar membrane water splitting removes the cationic general principle of heavy metal in soil, in intermediate layer, water dissociates, (event is without the need to outer acid supplemented solution to generate hydrogen ion continually, large amount of sewage can not be produced), hydrogen ion to enter in soil chamber the heavy metal cation wash-out in soil out through the anode membrane layer of Bipolar Membrane, by wash-out heavy metal cation out under electric field action, enter hydroecium.Simultaneously, the hydroxide ion (hydroxide ion is produced by negative electrode when single soil chamber) that Bipolar Membrane intermediate layer water decomposition produces, hydroecium is entered through Bipolar Membrane cavity block layer under electric field action, react with the heavy metal cation entering hydroecium, produce precipitation and remove, thus not causing secondary pollution.Heavy metal cation is easy to wash-out, migration and removing from soil under hydrogen ion wash-out and electric field action.The method that applying double pole membrane technology removes heavy metal in soil is organically combined sour drip washing and electronic chemical method, and both's advantage, overcomes its shortcoming.The utility model also can be used for the removal aspect of metal cation in the solid waste such as mud, slag.
Summary of the invention
The utility model provides the one cationic bipolar membrane electrolytic cell of applying double pole membrane technology removal heavy metal in soil safely and effectively.This electrolytic cell utilizes Bipolar membrane water splitting, sour elution method and electronic chemical method is combined, and remove heavy metal in soil cation, the heavy metal-polluted soil cations after process significantly reduces, and does not produce secondary pollution.
Bipolar membrane electrolytic cell involved by the utility model, for cuboid channel-shaped structure, formed by anode, anion-exchange membrane and negative electrode sequential in electrolytic cell, and be naturally divided into anode chamber and cathode chamber, anode and negative electrode are connected with the positive and negative polarities of dc source respectively, it is characterized in that between anode and anion-exchange membrane, be provided with multiple soil treatment unit be made up of Bipolar Membrane and cation-exchange membrane, thus electrolytic cell being divided into anode chamber, soil treating chamber, hydroecium, cathode chamber, is soil treating chamber between Bipolar Membrane and cation-exchange membrane.
Described Bipolar Membrane is specific ion exchange membrane, and it is by anode membrane layer and the compounded anions and canons composite membrane of cavity block layer.
Described Bipolar Membrane, is also provided with capillary ceramic plate in the side towards soil treating chamber.
Described cation-exchange membrane, is also provided with capillary ceramic plate in the side towards soil treating chamber.
Described multiple soil treatment unit be made up of Bipolar Membrane and cation-exchange membrane, infinitely can be in series in theory, to consider the factor of supporting cost and Current Voltage, described in the utility modelly multiplely refer to 1 ~ 6.
Bipolar Membrane in above-mentioned electrolytic cell is under DC electric field effect, in intermediate layer, water dissociates, the hydrogen ion generated enters in soil chamber through Bipolar Membrane anode membrane layer, the heavy metal cation wash-out in soil out, by wash-out heavy metal cation out under electric field action, enter hydroecium, produce with Bipolar Membrane intermediate layer and move to the hydroxide ion that hydroecium and negative electrode produce and react, produce precipitation and remove.
The advantage that the utility model has and good effect are: 1, Bipolar Membrane is under DC electric field effect, and in intermediate layer, water dissociates and produces hydrogen ion, without the need to outer acid adding, have saved cost, reduce the generation of sewage.2, under hydrogen ion wash-out and electric field action, wash-out, migration and removing from soil is easy to by wash-out heavy metal cation out.3, the hydroxide ion that the heavy metal cation entering hydroecium can produce (or negative electrode generation) with water decomposition in Bipolar Membrane intermediate layer reacts, and produces precipitation and removes, not causing secondary pollution.4, can connect, thus improve current efficiency and electric slot space utilization rate, minimizing electrode surface side reaction generation, reduction energy consumption and cost.
Accompanying drawing explanation
Fig. 1 is that one described in the utility model can remove the cationic bipolar membrane electrolytic cell structural representation of heavy metal in soil.
Fig. 2 is that the one arranging multiple soil treatment unit described in the utility model can remove the cationic bipolar membrane electrolytic cell structural representation of heavy metal in soil.
Detailed description of the invention
For utility model content of the present utility model, Characteristic can be understood further, hereby by reference to the accompanying drawings, elaborate by way of example.
In Fig. 1: 1 is electrolytic cell; 2 is anodes; 3 is Bipolar Membrane; 4 is capillary ceramic plates; 5 is cation-exchange membranes; 6 is anion-exchange membranes; 7 is negative electrodes; I is anode chamber; II is soil chamber; III is hydroecium; IV is cathode chamber.
In Fig. 1: 1 is electrolytic cell; 2 is anodes; 3 is Bipolar Membrane; 4 is capillary ceramic plates; 5 is cation-exchange membranes; 6 is anion-exchange membranes; 7 is negative electrodes; I is anode chamber; II is soil chamber; III is hydroecium; IV is cathode chamber.
Embodiment 1
A kind of applying double pole membrane technology is as shown in Figure 1 adopted to remove the cationic electrolytic cell of heavy metal in soil, the both sides of soil chamber use Bipolar Membrane and anode membrane respectively, anode chamber and hydroecium are separated, separate with capillary ceramic plate between soil and film in addition, anode and negative electrode are connected with the positive and negative polarities of dc source respectively.
Containing Pb in contaminated soil handled by the present embodiment
2+, Zn
2+, Cu
2+, Cd
2+, Ni
2+, Cr
3+, Cr
6+etc. heavy metal ion, voltage gradient is 1.0V/m, and electrode spacing is 12cm, and system runs 4d continuously.The Na with 0.05mol/L is all added in anode chamber and cathode chamber
2sO
4solution is as electrolyte, and its liquid level is concordant with contaminated soil, and before and after contaminated soil process, content of beary metal is in table 1.
Table 1: content of beary metal (mg/Kg) before and after soil treatment.
| Heavy metal | Pb | Zn | Cd | Cu | Cr | Ni |
| Before process | 2500 | 2500 | 250 | 2000 | 1500 | 1000 |
| After process | 328 | 378 | 18 | 286 | 192 | 132 |
Embodiment 2
A kind of applying double pole membrane technology is as shown in Figure 2 adopted to remove the cationic electrolytic cell of heavy metal in soil, the both sides of soil chamber separate with anode chamber and hydroecium with Bipolar Membrane and anode membrane respectively, separate with capillary ceramic plate between soil and film in addition, 3 soil chamber are alternately connected with 3 hydroeciums.Anode and negative electrode are connected with the positive and negative polarities of dc source respectively.
Containing Pb in contaminated soil handled by the present embodiment
2+, Zn
2+, Cu
2+, Cd
2+, Ni
2+, Cr
3+, Cr
6+etc. heavy metal ion, voltage gradient is 1.0V/m, and electrode spacing is 36cm, and system runs 4d continuously.The Na with 0.05mol/L is all added in anode chamber and cathode chamber
2sO
4solution is as electrolyte, and its liquid level is concordant with contaminated soil, and before and after contaminated soil process, content of beary metal is in table 2
Table 2: content of beary metal mg/Kg before and after soil treatment
Embodiment 3
A kind of applying double pole membrane technology is as shown in Figure 2 adopted to remove the cationic electrolytic cell of heavy metal in soil, the both sides of soil chamber separate with anode chamber and hydroecium with Bipolar Membrane and anode membrane respectively, separate with capillary ceramic plate between soil and film in addition, 3 soil chamber are alternately connected with 3 hydroeciums.Anode and negative electrode are connected with the positive and negative polarities of dc source respectively.
Containing Pb in contaminated soil handled by the present embodiment
2+, Zn
2+, Cu
2+, Cd
2+, Ni
2+, Cr
3+, Cr
6+deng metal ion, voltage gradient is 0.85V/cm, and electrode spacing is 30cm, and system runs 3d continuously.The Na with 0.1mol/L is all added in anode chamber and cathode chamber
2sO
4solution is as electrolyte, and its liquid level is concordant with contaminated soil, and before and after contaminated soil process, content of beary metal is in table 3.
Table 3: content of beary metal mg/Kg before and after soil treatment
Embodiment 4
A kind of applying double pole membrane technology is as shown in Figure 2 adopted to remove the cationic electrolytic cell of heavy metal in soil, the both sides of soil chamber separate with anode chamber and hydroecium with Bipolar Membrane and anode membrane respectively, separate with capillary ceramic plate between soil and film in addition, 3 soil chamber are alternately connected with 3 hydroeciums.Anode and negative electrode are connected with the positive and negative polarities of dc source respectively.
Containing Pb in contaminated soil handled by this experiment
2+, Zn
2+, Cu
2+, Cd
2+, Ni
2+, Cr
3+, Cr
6+deng metal ion, voltage gradient is 1.5V/cm, and electrode spacing is 32cm, and system runs 5d continuously.The Na with 0.5mol/L is all added in anode chamber and cathode chamber
2sO
4solution is as electrolyte, and its liquid level is concordant with contaminated soil, and before and after contaminated soil process, content of beary metal is in table 4.
Table 4: content of beary metal mg/Kg before and after soil treatment
Claims (5)
1. can remove the cationic bipolar membrane electrolytic cell of heavy metal in soil for one kind, for cuboid channel-shaped structure, by anode in electrolytic cell, anion-exchange membrane and negative electrode sequential form, and be naturally divided into anode chamber and cathode chamber, anode and negative electrode are connected with the positive and negative polarities of dc source respectively, it is characterized in that between anode and anion-exchange membrane, be provided with multiple soil treatment unit be made up of Bipolar Membrane and cation-exchange membrane, thus electrolytic cell is divided into anode chamber, soil treating chamber, hydroecium, cathode chamber, it is soil treating chamber between Bipolar Membrane and cation-exchange membrane.
2. one according to claim 1 can remove the cationic bipolar membrane electrolytic cell of heavy metal in soil, it is characterized in that described Bipolar Membrane is specific ion exchange membrane, and it is by anode membrane layer and the compounded yin, yang composite membrane of cavity block layer.
3. one according to claim 1 can remove the cationic bipolar membrane electrolytic cell of heavy metal in soil, it is characterized in that described Bipolar Membrane, is also provided with capillary ceramic plate in the side towards soil treating chamber.
4. one according to claim 1 can remove the cationic bipolar membrane electrolytic cell of heavy metal in soil, it is characterized in that described cation-exchange membrane, is also provided with capillary ceramic plate in the side towards soil treating chamber.
5. one according to claim 1 can remove the cationic bipolar membrane electrolytic cell of heavy metal in soil, it is characterized in that described soil treatment unit, has 1 ~ 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520549275.0U CN204934196U (en) | 2015-07-27 | 2015-07-27 | One can remove the cationic bipolar membrane electrolytic cell of heavy metal in soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520549275.0U CN204934196U (en) | 2015-07-27 | 2015-07-27 | One can remove the cationic bipolar membrane electrolytic cell of heavy metal in soil |
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| CN204934196U true CN204934196U (en) | 2016-01-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104959378A (en) * | 2015-07-27 | 2015-10-07 | 福建师范大学 | Bipolar-membrane electrolytic tank capable of removing heavy metal cations in soil |
| CN107913905A (en) * | 2017-12-21 | 2018-04-17 | 中科京投环境科技江苏有限公司 | A kind of device of showering mercury contaminated soil |
-
2015
- 2015-07-27 CN CN201520549275.0U patent/CN204934196U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104959378A (en) * | 2015-07-27 | 2015-10-07 | 福建师范大学 | Bipolar-membrane electrolytic tank capable of removing heavy metal cations in soil |
| CN104959378B (en) * | 2015-07-27 | 2017-09-29 | 福建师范大学 | A kind of bipolar membrane electrolytic cell of removable heavy metal in soil cation |
| CN107913905A (en) * | 2017-12-21 | 2018-04-17 | 中科京投环境科技江苏有限公司 | A kind of device of showering mercury contaminated soil |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160106 Effective date of abandoning: 20170929 |