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A device for remediating polluted soil using electric power

A contaminated soil and soil remediation technology, applied in the field of waste treatment, can solve the problems of reduced current density and reduced remediation efficiency, and achieve the effects of strengthening migration, improving coverage efficiency, and increasing mobility

Active Publication Date: 2019-07-23
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The existing electric repair electrodes are arranged in parallel, and the electric field and current between the positive and negative electrodes are constant. As the repair progresses, due to the enrichment and removal of pollutants, the current density will gradually decrease, and the repair efficiency will gradually decrease.

Method used

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  • A device for remediating polluted soil using electric power
  • A device for remediating polluted soil using electric power
  • A device for remediating polluted soil using electric power

Examples

Experimental program
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Embodiment 1

[0040] Example 1: A device for remediating polluted soil using electric power

[0041] The device for repairing polluted soil by electromotive power of the present invention, the main part is a soil repair reactor designed with a regular polygonal shell; the soil repair reactor is divided into an anode electrolysis chamber, a soil column chamber, and a cathode electrolysis chamber; a plurality of anodes The electrolysis chamber is located at the vertices of the polygon, and the single cathode electrolysis chamber is located in the middle. The anode electrolysis chamber and the cathode electrolysis chamber are provided with electrodes, which are respectively connected to the positive and negative poles of the DC power supply. The bottoms of the anode electrolysis chamber and the cathode electrolysis chamber contain cones, so that the electrode chamber of the device can be safely put into the soil.

[0042] Preferably, the polygon is a regular hexagon.

[0043] The device of t...

Embodiment 2

[0044] Example 2: A device for remediating polluted soil using electric power

[0045] Such as figure 1 As shown, it is a composition mode of the device of the present invention, which adopts a hexagonal shell design, six anode devices form a regular hexagon, and the cathode device is in the middle. It includes a DC power supply 1, a soil remediation reactor 11, an ion exchange chamber 7, an electrolyte mixing chamber 8, and a waste liquid collection chamber 9; the soil remediation reactor 11 is divided into an anode electrolysis chamber 4, a soil column chamber 10, and a cathode electrolysis chamber 5. The soil to be treated is placed in the soil column chamber 10, the anode chamber 4 and the cathode chamber 5 are equipped with electrolyte, and electrodes 6 are arranged, which are respectively connected to the positive and negative electrodes of the DC power supply 1, and the electrolyte soaks the soil column chamber 10. soil.

[0046] The ion exchange chamber 7 contains io...

Embodiment 3

[0049] Embodiment 3: remediation of chromium-contaminated soil

[0050] use figure 2 As shown in the device, the main body of the electrodynamic enrichment heavy metal device is a regular hexagonal plexiglass device, which consists of a soil column chamber (L×H=50cm×65cm), an electrode chamber (16cm 2 ×65cm), regulated DC power supply, composite graphite electrode (12cm 2 ×50cm), mechanical diaphragm vacuum pump, etc. During the experiment, the electrolyte enters the anode electrode chamber from the electrolyte mixing chamber, and the electrolyte entering the cathode electrode chamber through the electrokinetic effect removes cations through the ion exchange chamber, then enters the electrolyte mixing chamber and mixes with the raw electrolyte, and then enters the anode electrode chamber. Finally, the electrolyte from the anode chamber, which is full of polluting substances, goes to waste collection for further processing. The distance between electrodes was 57 cm, and the...

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Abstract

The invention discloses a device for repairing polluted soil by using electric power and belongs to the technical field of processing of wastes. The device disclosed by the invention adopts a hexagonal shell design; a normal hexagonal shape is formed by six anode devices; each anode device is arranged at the center and comprises a direct-current power supply, an electrolyte raw material chamber, a soil repairing reactor, an ion exchange chamber, an electrolyte mixing chamber and a waste solution collection chamber; and the soil repairing reactor in each device is inserted into soil, and a cathode and an anode are connected with the direct-current power supply to form a direct-current electric field, so that heavy metal, organic matters and the like can be removed under the action of electro-migration, electro-osmotic flow and the like. According to the device, a treatment area can be adjusted according to the size of a treatment field or treatment can be carried in batches according to the size and shape of the field.

Description

technical field [0001] The invention relates to a device for repairing polluted soil by using electric power, and belongs to the technical field of waste treatment. Background technique [0002] In recent years, due to the rapid growth of population and the rapid development of industry, a large amount of various types of pollutants have been produced. Solid wastes are continuously piled and dumped on the soil surface, harmful waste water is continuously infiltrated into the soil, and harmful gases and floating dust in the atmosphere are also continuously falling into the soil with rainwater, resulting in soil pollution. These pollutants are continuously enriched in organisms through the food chain, which has great potential harm to human health. Soil pollutants can be mainly divided into heavy metals and organic substances, which have the characteristics of concealment, long-term effect and refractory, so it is difficult to deal with them by conventional methods. [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08
CPCB09C1/085
Inventor 邹华杜玮朱荣孙玉超
Owner JIANGNAN UNIV