CN210523390U - Electronic prosthetic devices of compound heavy metal contaminated soil - Google Patents
Electronic prosthetic devices of compound heavy metal contaminated soil Download PDFInfo
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- CN210523390U CN210523390U CN201921445004.5U CN201921445004U CN210523390U CN 210523390 U CN210523390 U CN 210523390U CN 201921445004 U CN201921445004 U CN 201921445004U CN 210523390 U CN210523390 U CN 210523390U
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Abstract
An electric remediation device for composite heavy metal contaminated soil comprises a direct-current power supply, an anode electrolysis chamber, a remediation chamber, a cathode electrolysis chamber and two graphene oxide-stainless steel electrodes; the anode electrolysis chamber and the cathode electrolysis chamber are respectively positioned on the left side and the right side of the repair chamber, and organic glass plates are respectively arranged between the right side of the anode electrolysis chamber and the left side of the repair chamber and between the left side of the cathode electrolysis chamber and the right side of the repair chamber; two graphene oxide-stainless steel electrodes are respectively arranged in the anode electrolysis chamber and the cathode electrolysis chamber, and the two graphene oxide-stainless steel electrodes of the direct current power supply are connected. The utility model discloses can promote the analysis of heavy metal in the soil, improve the content of free state heavy metal in the contaminated soil, strengthen the repair effect, electrode circulated use to its corrosion resistance is good, and the restoration energy consumption is low, and is with low costs, no secondary pollution, and the repair efficiency is high, and the security is good.
Description
Technical Field
The utility model belongs to the technical field of soil remediation heavy metal pollution, concretely relates to electronic prosthetic devices of compound heavy metal contaminated soil.
Background
At present, due to unreasonable exploitation and utilization of heavy metal mineral resources and fossil fuels, generated tailing dust and heavy metal waste residues enter soil, a large amount of soil around a mining area is seriously polluted by heavy metal composite heavy metals, heavy metal pollution is concealed and cannot be biodegraded, heavy metals are continuously enriched in organisms through food chains and finally enter human bodies to accumulate, and the health of the human bodies is seriously threatened.
The electric remediation method is a novel soil heavy metal pollution remediation technology and has the advantages of wide application range, short remediation period, difficulty in causing secondary pollution and the like. The principle of electric restoration is that an electrode is inserted into soil polluted by heavy metal, low-voltage direct current is conducted to two sides of a soil chamber to form an electric field, water or an external electrolyte solution in soil particle pores and the electrode chamber is used as a conductive medium, so that water-soluble pollutants and pollutants adsorbed on the surface layer of the soil particles move to different electrode directions according to different charges under the electro-kinetic effects such as electrodialysis, electromigration and electrophoresis generated by the electric field, and the purpose that the pollutants near the electrode are removed by methods such as precipitation/coprecipitation, electroplating or ion exchange extraction is achieved.
In the process of electrokinetic remediation of soil heavy metals, the following problems exist:
(1) when graphite or metal is used as an electrode, the electrode is strongly corroded under the conditions of extreme acid, extreme alkali and large current, and the soil remediation cost is greatly increased due to the electrode which cannot be recycled.
(2) OH produced by the electrolytic reaction of the catholyte-The soil near the cathode is alkalized, and hydroxide precipitates are formed when heavy metal pollutants in the soil meet an alkaline area, so that the heavy metals are prevented from migrating out of a soil system, and the soil remediation difficulty is increased.
(3) After electric remediation, heavy metal pollutants in the soil migrate into the electrolyte, and the electrolyte cannot be recycled after being polluted, so that the soil remediation cost is increased.
(4) Heavy metal pollutants with positive charges in the soil in the anode region migrate to the cathode under the action of an electric field, or heavy metal pollutants with negative charges in the soil in the cathode region migrate to the anode under the action of the electric field, and the migration distance from the soil is long, so that the repairing period is long, and the energy consumption is high.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the weak point among the prior art, provide an electronic prosthetic devices of compound heavy metal contaminated soil, it can improve the repair efficiency of heavy metal contaminated soil effectively, shortens the prosthetic cycle of soil, has reduced the prosthetic cost of soil simultaneously.
In order to solve the technical problem, the utility model adopts the following technical scheme: an electric remediation device for composite heavy metal contaminated soil comprises a direct-current power supply 1, an anode electrolysis chamber 2, a remediation chamber 3, a cathode electrolysis chamber 4 and two graphene oxide-stainless steel electrodes 5;
the anode electrolysis chamber 2 and the cathode electrolysis chamber 4 are respectively positioned at the left side and the right side of the repair chamber 3, a first organic glass plate 6 is vertically arranged between the right side of the anode electrolysis chamber 2 and the left side of the repair chamber 1, and a second organic glass plate 7 is vertically arranged between the left side of the cathode electrolysis chamber 4 and the right side of the repair chamber 1;
two graphene oxide-stainless steel electrodes 5 are respectively arranged in the anode electrolysis chamber 2 and the cathode electrolysis chamber 4, and the positive electrode and the negative electrode of the direct current power supply 1 are respectively connected with the graphene oxide-stainless steel electrode 5 in the anode electrolysis chamber 2 and the graphene oxide-stainless steel electrode 5 in the cathode electrolysis chamber 4 through leads.
Two first electrolysis chamber S2 and second electrolysis chamber S4 with the same structure are arranged in the repairing chamber 3, and the first electrolysis chamber S2 and the second electrolysis chamber S4 are arranged at intervals along the left-right direction and divide the interior of the repairing chamber 3 into a first soil chamber S1, a second soil chamber S3 and a third soil chamber S5.
First electrolysis chamber (S2) and second electrolysis chamber (S4) all include perpendicular third organic glass board 8 and the fourth organic glass board 9 that sets up and the interval, the front side of third organic glass board 8 and fourth organic glass board 9, back side and lower limb all correspond and restore the front side inner wall of room 3, back side inner wall and bottom inner wall connection, all be provided with a oxidation graphite alkene-stainless steel net 10 between third organic glass board 8 and the fourth organic glass board 9, oxidation graphite alkene-stainless steel net 10 is parallel with third organic glass board 8.
All be equipped with the round hole that a plurality of diameter is 0.5 cm on first organic glass board 6, second organic glass board 7, third organic glass board 8 and the fourth organic glass board 9, the filter cloth that the one deck aperture is 48 mu m is all adhered to on the surface of first organic glass board 6, second organic glass board 7, third organic glass board 8 and fourth organic glass board 9.
By adopting the technical scheme, the repairing method of the electric repairing device for the composite heavy metal polluted soil comprises the following steps,
(1) naturally drying the polluted soil to be treated in the air, removing sand gravel and plant residues in the polluted soil, grinding the polluted soil to be treated, and then sieving and bagging for later use;
(2) pouring the bagged and standby polluted soil to be treated into a stirrer, adding citric acid solution, controlling the water content to be not less than 25%, uniformly stirring and mixing, and standing for 24 hours;
(3) then, the contaminated soil is loaded into the first soil chamber S1, the second soil chamber S3, and the third soil chamber S5, respectively; 0.1 mol.L is added into an anode electrolytic chamber 2-1The disodium hydrogen phosphate-sodium dihydrogen phosphate buffer solution is used as an anolyte, and 0.1 mol.L is added into a cathode electrolytic chamber 4-1The citric acid-sodium citrate buffer solution is used as a cathode electrolyte, so that the pH values of the anode electrolyte in the anode electrolysis chamber 2 and the cathode electrolyte in the cathode electrolysis chamber 4 are maintained between 5 and 7; 0.1 mol. L is added into the first electrolytic chamber S2 and the second electrolytic chamber S4-1The KCl solution is used as electrolyte;
(4) the method comprises the following steps that a direct-current power supply 1 is started to supply power to two graphene oxide-stainless steel electrodes 5, current flowing through a repair room 3 is generated, the heights of electrolytes in an anode electrolysis room 2, a cathode electrolysis room 4, a first electrolysis room S2 and a second electrolysis room S4 are kept consistent with the height of polluted soil all the time in the experimental process, the repair voltage gradient of the direct-current power supply 1 is controlled to be 1-5V/cm, and the polluted soil is repaired;
(5) an electric field is formed between the two graphene oxide-stainless steel electrodes 5, heavy metals in the polluted soil are mainly migrated in an electromigration mode under the action of electric field force, and the heavy metals are migrated to the cathode in a cation mode or the anode in an anion mode; heavy metal ions in the polluted soil enter the anode electrolysis chamber 2, the cathode electrolysis chamber 4, the first electrolysis chamber S2 and the second electrolysis chamber S4 in the process of migrating to the anode electrolysis chamber 2 and the cathode electrolysis chamber 4, and are adsorbed by a graphene oxide-stainless steel electrode and a graphene oxide-stainless steel net in the electrolyte;
(6) and replacing the graphene oxide-stainless steel electrode and the graphene oxide-stainless steel net regularly, wherein the replaced graphene oxide-stainless steel electrode and the replaced graphene oxide-stainless steel net can be recycled after being washed by dilute nitric acid, the frequency of periodical replacement is 5-7 days, and the repairing operation is completed after the heavy metal content in the polluted soil in the first soil chamber S1, the second soil chamber S3 and the third soil chamber S5 reaches the standard.
The utility model discloses following beneficial effect has:
1. the utility model discloses adopt citric acid to carry out the preliminary treatment to it before carrying out electronic restoration to contaminated soil, can promote the analysis of heavy metal in the soil, improve the content of free state heavy metal in the contaminated soil, reinforcing repair effect.
2. The utility model discloses a pH of citric acid-sodium citrate buffer solution control catholyte is at 5~7, avoids near negative pole soil to take place to alkalize, and heavy metal pollutant forms the hydroxide deposit when meetting the alkaline region, hinders the migration of heavy metal pollutant.
3. The utility model discloses in, from polluting the heavy metal that migrates in the soil to electrolyte and adsorb by oxidation graphite alkene-stainless steel electrode and oxidation graphite alkene-stainless steel mesh, electrolyte is not polluted, but reuse.
4. The utility model discloses in, but the graphite oxide-stainless steel electrode and the graphite oxide-stainless steel net after adsorbing the heavy metal recycle after rare nitric acid pickling to its corrosion resistance is good, has reduced the repair cost.
5. In the utility model, the electrolyte in the first electrolytic chamber and the second electrolytic chamber adopts 0.1 mol. L-1The KCl solution improves the water content and the conductivity of the polluted soil and enhances the migration effect of heavy metals.
6. The utility model discloses in, adopt the structure that electrolysis room and soil room interval set up, the distance of heavy metal migration soil room shortens, and the prosthetic cycle of soil shortens, and the restoration energy consumption reduces.
7. The utility model discloses in, soil repair process easy operation, no secondary pollution, the remediation efficiency is high, and the security is good.
Drawings
Fig. 1 is a schematic structural view of the electric repairing apparatus of the present invention.
Detailed Description
The following description is given by way of example to further clarify the salient features of the present invention, and is intended only to illustrate the present invention without limiting it.
As shown in fig. 1, an electric remediation device for composite heavy metal contaminated soil comprises a direct current power supply 1, an anode electrolysis chamber 2, a remediation chamber 3, a cathode electrolysis chamber 4 and two graphene oxide-stainless steel electrodes 5;
the anode electrolysis chamber 2 and the cathode electrolysis chamber 4 are respectively positioned at the left side and the right side of the repair chamber 3, a first organic glass plate 6 is vertically arranged between the right side of the anode electrolysis chamber 2 and the left side of the repair chamber 1, and a second organic glass plate 7 is vertically arranged between the left side of the cathode electrolysis chamber 4 and the right side of the repair chamber 1;
two graphene oxide-stainless steel electrodes 5 are respectively arranged in the anode electrolysis chamber 2 and the cathode electrolysis chamber 4, and the positive electrode and the negative electrode of the direct current power supply 1 are respectively connected with the graphene oxide-stainless steel electrode 5 in the anode electrolysis chamber 2 and the graphene oxide-stainless steel electrode 5 in the cathode electrolysis chamber 4 through leads.
Two first electrolysis chamber S2 and second electrolysis chamber S4 with the same structure are arranged in the repairing chamber 3, and the first electrolysis chamber S2 and the second electrolysis chamber S4 are arranged at intervals along the left-right direction and divide the interior of the repairing chamber 3 into a first soil chamber S1, a second soil chamber S3 and a third soil chamber S5.
First electrolysis chamber (S2) and second electrolysis chamber (S4) all include perpendicular third organic glass board 8 and the fourth organic glass board 9 that sets up and the interval, the front side of third organic glass board 8 and fourth organic glass board 9, back side and lower limb all correspond and restore the front side inner wall of room 3, back side inner wall and bottom inner wall connection, all be provided with a oxidation graphite alkene-stainless steel net 10 between third organic glass board 8 and the fourth organic glass board 9, oxidation graphite alkene-stainless steel net 10 is parallel with third organic glass board 8.
All be equipped with the round hole that a plurality of diameter is 0.5 cm on first organic glass board 6, second organic glass board 7, third organic glass board 8 and the fourth organic glass board 9, the filter cloth that the one deck aperture is 48 mu m is all adhered to on the surface of first organic glass board 6, second organic glass board 7, third organic glass board 8 and fourth organic glass board 9.
The repairing method of the electric repairing device for the composite heavy metal contaminated soil comprises the following steps,
(1) naturally drying the polluted soil to be treated in the air, removing sand gravel and plant residues in the polluted soil, grinding the polluted soil to be treated, and then sieving and bagging for later use;
(2) pouring the bagged and standby polluted soil to be treated into a stirrer, adding citric acid solution, controlling the water content to be not less than 25%, uniformly stirring and mixing, and standing for 24 hours;
(3) then, the contaminated soil is loaded into the first soil chamber S1, the second soil chamber S3, and the third soil chamber S5, respectively; 0.1 mol.L is added into an anode electrolytic chamber 2-1The disodium hydrogen phosphate-sodium dihydrogen phosphate buffer solution is used as an anolyte, and 0.1 mol.L is added into a cathode electrolytic chamber 4-1The citric acid-sodium citrate buffer solution is used as a cathode electrolyte, so that the pH values of the anode electrolyte in the anode electrolysis chamber 2 and the cathode electrolyte in the cathode electrolysis chamber 4 are maintained between 5 and 7; 0.1 mol. L is added into the first electrolytic chamber S2 and the second electrolytic chamber S4-1The KCl solution is used as electrolyte;
(4) the method comprises the following steps that a direct-current power supply 1 is started to supply power to two graphene oxide-stainless steel electrodes 5, current flowing through a repair room 3 is generated, the heights of electrolytes in an anode electrolysis room 2, a cathode electrolysis room 4, a first electrolysis room S2 and a second electrolysis room S4 are kept consistent with the height of polluted soil all the time in the experimental process, the repair voltage gradient of the direct-current power supply 1 is controlled to be 1-5V/cm, and the polluted soil is repaired;
(5) an electric field is formed between the two graphene oxide-stainless steel electrodes 5, heavy metals in the polluted soil are mainly migrated in an electromigration mode under the action of electric field force, and the heavy metals are migrated to the cathode in a cation mode or the anode in an anion mode; heavy metal ions in the polluted soil enter the anode electrolysis chamber 2, the cathode electrolysis chamber 4, the first electrolysis chamber S2 and the second electrolysis chamber S4 in the process of migrating to the anode electrolysis chamber 2 and the cathode electrolysis chamber 4, and are adsorbed by a graphene oxide-stainless steel electrode and a graphene oxide-stainless steel net in the electrolyte;
(6) and replacing the graphene oxide-stainless steel electrode and the graphene oxide-stainless steel net regularly, wherein the replaced graphene oxide-stainless steel electrode and the replaced graphene oxide-stainless steel net can be recycled after being washed by dilute nitric acid, the frequency of periodical replacement is 5-7 days, and the repairing operation is completed after the heavy metal content in the polluted soil in the first soil chamber S1, the second soil chamber S3 and the third soil chamber S5 reaches the standard.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any form, and all of the technical matters of the present invention belong to the protection scope of the present invention to any simple modification, equivalent change and modification made by the above embodiments.
Claims (4)
1. The utility model provides an electronic prosthetic devices of compound heavy metal contaminated soil which characterized in that: the device comprises a direct-current power supply (1), an anode electrolysis chamber (2), a repair chamber (3), a cathode electrolysis chamber (4) and two graphene oxide-stainless steel electrodes (5);
the anode electrolysis chamber (2) and the cathode electrolysis chamber (4) are respectively positioned at the left side and the right side of the repair chamber (3), a first organic glass plate (6) is vertically arranged between the right side of the anode electrolysis chamber (2) and the left side of the repair chamber (3), and a second organic glass plate (7) is vertically arranged between the left side of the cathode electrolysis chamber (4) and the right side of the repair chamber (3);
two graphene oxide-stainless steel electrodes (5) are respectively arranged in the anode electrolysis chamber (2) and the cathode electrolysis chamber (4), and the anode and the cathode of the direct current power supply (1) are respectively connected with the graphene oxide-stainless steel electrode (5) in the anode electrolysis chamber (2) and the graphene oxide-stainless steel electrode (5) in the cathode electrolysis chamber (4) through leads.
2. The device for electrically repairing soil polluted by complex heavy metals, according to claim 1, is characterized in that: the repairing chamber (3) is internally provided with a first electrolytic chamber (S2) and a second electrolytic chamber (S4) which have the same structure, and the first electrolytic chamber (S2) and the second electrolytic chamber (S4) are arranged at intervals along the left-right direction and divide the interior of the repairing chamber (3) into a first soil chamber (S1), a second soil chamber (S3) and a third soil chamber (S5).
3. The device for electrically repairing soil polluted by complex heavy metals, according to claim 2, is characterized in that: first electrolysis chamber (S2) and second electrolysis chamber (S4) all include perpendicular third organic glass board (8) and fourth organic glass board (9) that and interval set up, the front side of third organic glass board (8) and fourth organic glass board (9), the front side inner wall of back side and lower limb all corresponding with repair room (3), back side inner wall and bottom wall connection, all be provided with a oxidation graphite alkene-stainless steel net (10) between third organic glass board (8) and fourth organic glass board (9), oxidation graphite alkene-stainless steel net (10) are parallel with third organic glass board (8).
4. The device of claim 3, wherein the device comprises: all be equipped with the round hole that a plurality of diameter is 0.5 cm on first organic glass board (6), second organic glass board (7), third organic glass board (8) and fourth organic glass board (9), the filter cloth that the one deck aperture is 48 mu m is all adhered to on the surface of first organic glass board (6), second organic glass board (7), third organic glass board (8) and fourth organic glass board (9).
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| CN201921445004.5U CN210523390U (en) | 2019-09-02 | 2019-09-02 | Electronic prosthetic devices of compound heavy metal contaminated soil |
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| CN201921445004.5U CN210523390U (en) | 2019-09-02 | 2019-09-02 | Electronic prosthetic devices of compound heavy metal contaminated soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479757A (en) * | 2019-09-02 | 2019-11-22 | 河南工程学院 | A kind of the electro reclamation device and restorative procedure of Compound Heavy Metals soil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479757A (en) * | 2019-09-02 | 2019-11-22 | 河南工程学院 | A kind of the electro reclamation device and restorative procedure of Compound Heavy Metals soil |
| CN110479757B (en) * | 2019-09-02 | 2024-02-09 | 河南工程学院 | Electric restoration device and restoration method for composite heavy metal contaminated soil |
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