Contaminated soil repairing device and method by adopting temperature control electric coupling spraying method

A rinsing device and technology for polluted soil are applied in the field of temperature-controlled electric coupling rinsing method to repair polluted soil devices, which can solve the problem of low efficiency, and achieve the effects of accelerating migration, improving the efficiency of electric repairing, and improving the effect of electromigration.

Active Publication Date: 2019-03-01
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem of low efficiency in the existing electric repair method device and testing method, the present invention adds a temperature control system and a rinsing system on the basis of the traditional electric repair method

Method used

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  • Contaminated soil repairing device and method by adopting temperature control electric coupling spraying method
  • Contaminated soil repairing device and method by adopting temperature control electric coupling spraying method
  • Contaminated soil repairing device and method by adopting temperature control electric coupling spraying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment one, device

[0051] In this example, if figure 1 As shown, a plexiglass plate and a plexiglass tube are used to make a washing device, and the plexiglass sheet is cut by a table saw, an engraving machine, etc. to make an upper plexiglass cover slip 1 with a diameter of 160 mm and a thickness of 2 mm. 1. Make a reserved electric heating rod thermocouple insertion hole 2 with a diameter of 25mm in the center, and evenly punch 4 upper exhaust holes 40mm from the edge of the upper organic glass cover sheet 1. 3; make a diameter of 160mm by cutting a organic glass plate Hollow organic glass sheet 5 in the lower part, open a hole with a diameter of 100mm at the center of the hollow organic glass sheet 5 in the lower part, and evenly punch 10 bolt holes 6 reserved for the hollow organic glass sheet in the lower part at 10 mm from the outer edge of the hollow organic glass sheet 5 in the lower part; Make the middle plexiglass tube 4 with an outer diameter of 100 mm...

Embodiment 2

[0062] Embodiment two, processing method

[0063] In this embodiment, the soil treatment chamber is placed on the supporting device, and a permeable stone is placed at the bottom of the soil treatment chamber; 200 g of heavy metal contaminated soil is put into the soil treatment chamber and compacted; Place a circular hollow PVC liner plate 25 between them, and connect with a nut 28 with a bolt 24 to seal; put the heat preservation pipe sleeve 45 on the middle plexiglass tube 4 of the rinsing device, and put the plastic square frame 36 of the electrolyte collecting device Put in the square thermal insulation foam box 44; Configure the anolyte solution 6000g, and put it into the electrolyte collection device, configure the catholyte solution 2000g, and put it into the rinsing device; put the superstructure (comprising the rinsing device, soil treatment room, supporting device, etc.) into the electrolyte collection device; place the stainless steel electrode plate 22 on one side...

Embodiment 3

[0066] Example 3. Research on the effect of electrodynamic restoration of certain hexavalent chromium-contaminated soil at a temperature of 45°C, a voltage of 30V, a solution of 0.5% KCL and 0.5% citric acid as the cathodic eluent, and a electrodynamic restoration time of 2 days.

[0067] In this embodiment, the specific steps are as follows:

[0068] (1) Take 200g of hexavalent chromium-contaminated soil.

[0069] (2) Sampling the soil, marking the chromium concentration as a, packing the soil sample with a sampling bag and sealing it up.

[0070] (3) Prepare a solution of 2000 g of 0.5% KCL and 0.5% citric acid.

[0071] (4) Install the temperature-controlled electric coupling leaching method to restore the contaminated soil device.

[0072] (5) Turn on the power, adjust the sliding rheostat to a current of 30mA, and carry out the experiment.

[0073] (6) Turn off the power after 2 days, take out the polluted soil soil sample, divide the soil sample into 5 parts b, c, d, ...

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Abstract

The invention relates to a contaminated soil repairing device by adopting a temperature control electric coupling spraying method. The device comprises a spraying device, a soil treatment chamber, a circuit device, a connecting device, a supporting device, an electrolyte collecting device, a temperature control device and a temperature preservation device; the spraying device is connected with thesoil treatment chamber through the connecting device, the supporting device is arranged below the soil treatment chamber, the spraying device, the soil treatment chamber and the supporting device areplaced in the electrolyte collecting device, and a stainless steel electrode plate and a stainless steel electrode piece of the circuit device are respectively arranged in the electrolyte collectingdevice and the spraying device. The device has the advantages that the temperature control device and the spraying device are firstly arranged for using, by adjusting the temperature of the contaminated soil repairing device in the electric repairing process, partial bound water in soil becomes free water, the viscosity coefficient of water is reduced, the structure of soil is damaged certainly, therefore soil permeability is improved, and desorbing of heavy metal elements in soil and soil is promoted.

Description

technical field [0001] The invention relates to a heavy metal-contaminated soil restoration device, in particular to a temperature-controlled electric coupled leaching method for restoration of contaminated soil and a treatment method. Background technique [0002] In recent years, with the rapid development of urbanization and the adjustment of industrial structure, the problem of soil pollution in industrial wasteland caused by enterprise relocation or shutdown has become increasingly prominent, and the soil environment is being threatened by unprecedented heavy metals. Soil pollution in my country is mainly caused by heavy metal pollution, among which cadmium, mercury, lead, and arsenic pollution are the most prominent. According to statistics, the number of contaminated sites in my country is conservatively estimated to be more than 500,000. The National Ministry of Environmental Protection and the Ministry of Land and Resources jointly issued the "National Soil Pollutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/02
CPCB09C1/02B09C1/085Y02P10/20
Inventor 王艳王爱骅刘干斌陈航
Owner NINGBO UNIV
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