Device for electrokinetic remediation of As-contaminated soil

Abstract

The utility model relates to a device for electrokinetic remediation of As contaminated soil, which comprises a soil treatment tank, a cathode chamber and an anode chamber are respectively arranged on two sides of the soil treatment tank, a cathode plate is arranged in the cathode chamber, an anode plate is arranged in the anode chamber, the cathode plate and the anode plate are respectively connected with a power supply, and the power supply is connected with the power supply. The cathode chamber is communicated with the cathode buffer solution tank, the anode chamber is communicated with the anode buffer solution tank, the soil treatment tank is vertically provided with a plurality of porous tanks, and the porous tanks are filled with adsorption materials. The utility model provides a device for electrokinetic remediation of As-contaminated soil, which utilizes an adsorption material arranged in a porous groove in the soil to adsorb As, realizes removal of heavy metal As in the contaminated soil, performs electrokinetic remediation, promotes directional migration of As from a cathode to an anode, reduces the total amount of As in the soil, and improves the removal effect of As.

Description

Technical Field

[0001] The utility model relates to an electric device for repairing As-contaminated soil, belonging to the technical field of soil heavy metal repair. Background Art

[0002] The electric osmotic reaction wall remediation technology applies a stable current in the environment to force the heavy metals to move in a certain direction, and then adsorbs the heavy metals through the osmotic reaction wall material, and finally removes the materials enriched with heavy metals in the osmotic reaction wall to achieve a reduction in the total amount of heavy metals. This method has a fast removal speed and high removal efficiency. The existing electric remediation device for contaminated soil has a need for improvement in the effect of electric remediation. Therefore, there is an urgent need for an electric remediation device for As contaminated soil to perform electric remediation to improve the removal effect of As. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a device for electrically repairing As contaminated soil, so as to improve the As removal effect by performing electric repair.

[0004] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0005] A device for electrically repairing As-contaminated soil comprises a soil treatment trough, wherein a cathode chamber and an anode chamber are respectively arranged on both sides of the soil treatment trough, a cathode plate is arranged in the cathode chamber, an anode plate is arranged in the anode chamber, the cathode plate and the anode plate are respectively connected to a power supply, the cathode chamber is communicated with a cathode buffer tank, the anode chamber is communicated with an anode buffer tank, and the soil treatment trough is vertically provided with a plurality of porous slots, wherein adsorption materials are installed in the porous slots.

[0006] The device of the utility model performs electric repair, promotes the directional migration of As from the cathode to the anode, and then utilizes the adsorption material arranged in the porous groove in the soil to adsorb As, thereby achieving the removal of heavy metal As in the contaminated soil, reducing the total amount of As in the soil, and improving the As removal effect.

[0007] As a preferred embodiment of the present utility model, in order to enhance the effect of the adsorption material in removing soil As, the porous groove is arranged in parallel with the cathode chamber and the anode chamber.

[0008] As a preferred embodiment of the utility model, the device for electrically repairing As-contaminated soil further includes a waste liquid tank connected to the cathode chamber and the anode chamber.

[0009] As a preferred embodiment of the utility model, the cathode chamber and the anode chamber adjacent to the soil treatment tank are porous plates, and a water-permeable membrane is adhered to the porous plate.

[0010] As a preferred embodiment of the utility model, the cathode chamber is connected to the cathode buffer tank through a peristaltic pump.

[0011] As a preferred embodiment of the utility model, the anode chamber is connected to the anode buffer tank through a peristaltic pump.

[0012] As a preferred embodiment of the utility model, the adsorbent material is one or more of steel slag, manganese dioxide, and biochar. The adsorbent material can be packaged with a water-permeable material so that the adsorbent material does not leak out of the water-permeable material, but the contaminated solution to be adsorbed in the contaminated soil can pass through the water-permeable material and be adsorbed by the adsorbent material.

[0013] Furthermore, the spacing between adjacent porous grooves is 5-10 cm.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a device for electrically repairing As-contaminated soil, which utilizes adsorption materials arranged in porous grooves in the soil to adsorb As, thereby removing heavy metal As from the contaminated soil, performing electric repair, promoting the directional migration of As from the cathode to the anode, reducing the total amount of As in the soil, and improving the As removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the electric repair device of the utility model;

[0016] Explanation of the reference numerals in the accompanying drawings: 1. peristaltic pump, 2. DC regulated power supply, 3. cathode chamber, 4. anode chamber, 5. waste liquid tank, 6. cathode buffer tank, 7. porous tank, 8. As contaminated soil, 9. soil treatment tank, 10. cathode plate, 11. anode plate, 12. anode buffer tank. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below in conjunction with embodiments.

[0018] Example 1

[0019] An electric device for remediating As contaminated soil comprises a soil treatment tank 9, wherein a cathode chamber 3 and an anode chamber 4 are respectively arranged on both sides of the soil treatment tank 9, wherein a cathode plate 10 is arranged in the cathode chamber 3, and an anode plate 11 is arranged in the anode chamber 4, wherein the cathode plate 10 and the anode plate 11 are respectively connected to a power supply 2, wherein the cathode chamber 3 is connected to a cathode buffer tank 6, and the anode chamber 4 is connected to an anode buffer tank 12, wherein the soil treatment tank 9 is vertically provided with a plurality of porous tanks 7, wherein the porous tanks 7 are provided with adsorbent materials. The porous tanks 7 are arranged in parallel with the cathode chamber 3 and the anode chamber 4. The electric device for remediating As contaminated soil further comprises a waste liquid tank 5 connected to the cathode chamber 3 and the anode chamber 4. The cathode chamber 3 and the anode chamber 4 are adjacent to the soil treatment tank 9 on a porous plate, and a water-permeable membrane is adhered to the porous plate. The cathode chamber 3 is connected to the cathode buffer tank 6 via a peristaltic pump 1. The anode chamber 4 is connected to the anode buffer tank 12 via a peristaltic pump 1. The spacing between adjacent porous grooves 7 is 5 cm.

[0020] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art fall within the scope defined by the claims attached to this application.

Claims

1. A device for electrically repairing As-contaminated soil, comprising a soil treatment tank (9), wherein a cathode chamber (3) and an anode chamber (4) are respectively arranged on both sides of the soil treatment tank (9), wherein a cathode plate (10) is arranged in the cathode chamber (3), and an anode plate (11) is arranged in the anode chamber (4), wherein the cathode plate (10) and the anode plate (11) are respectively connected to a power source (2), wherein the cathode chamber (3) is connected to a cathode buffer tank (6), and wherein the anode chamber (4) is connected to an anode buffer tank (12), wherein: The soil treatment tank (9) is vertically provided with a plurality of porous tanks (7), and the porous tanks (7) are filled with adsorption materials.

2. The device for electrically repairing As-contaminated soil according to claim 1 is characterized in that: The porous groove (7) is arranged in parallel with the cathode chamber (3) and the anode chamber (4).

3. The device for electrically repairing As-contaminated soil according to claim 1 is characterized in that: The device for electrically repairing As-contaminated soil further comprises a waste liquid tank (5) connected to the cathode chamber (3) and the anode chamber (4).

4. The device for electrically repairing As-contaminated soil according to claim 1 is characterized in that: The cathode chamber (3) and the anode chamber (4) are formed on the side adjacent to the soil treatment tank (9) in a porous plate, and a water-permeable membrane is adhered to the porous plate.

5. The device for electrically repairing As-contaminated soil according to claim 1 is characterized in that: The cathode chamber (3) is connected to the cathode buffer tank (6) via a peristaltic pump (1).

6. The device for electrically repairing As-contaminated soil according to claim 1 is characterized in that: The anode chamber (4) is connected to the anode buffer tank (12) via a peristaltic pump (1).

7. The device for electrically repairing As-contaminated soil according to claim 1 is characterized in that: The spacing between adjacent porous grooves (7) is 5-10 cm.

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