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Periodic composite repair device of arsenic polluted soil

A composite repair and periodic technology, applied in the restoration of contaminated soil, etc., can solve the problems of low repair efficiency, lack of special equipment, arsenic pollution, etc., and achieve the effects of saving costs, improving the level of automatic operation, and strengthening root absorption

Inactive Publication Date: 2015-02-25
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide an arsenic-contaminated soil variable periodic composite restoration device to solve the above-mentioned problems of lack of special equipment and low restoration efficiency in soil restoration, and to solve the problem of arsenic pollution in soil in a targeted manner

Method used

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  • Periodic composite repair device of arsenic polluted soil
  • Periodic composite repair device of arsenic polluted soil
  • Periodic composite repair device of arsenic polluted soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the arsenic-contaminated soil variable-period composite restoration device of the present invention includes an electric field generation module, a vegetation restoration layer, a soil pH adjustment module and a surfactant spray module.

[0038] The electric field generating module includes a power supply 1 and an anode chamber 4-1 and a cathode chamber 4-2 arranged below the ground, and an anode electrode 1-1 and a cathode electrode 1-2 are respectively arranged in the anode chamber 4-1 and the cathode chamber 4 In -2, the electric field generation module is arranged along the groundwater flow direction of the soil area to be repaired, and the anode chamber 4-1 is set at the upstream position of the groundwater flow direction, and the cathode chamber 4-2 is set at the downstream position of the groundwater flow direction, forming an electric field The direction is basically consistent with the direction of groundwater flow to achieve better ...

Embodiment 2

[0045] In this embodiment, on the basis of Embodiment 1, a pH detection device is added to detect the pH of the anode chamber, cathode chamber and the soil area to be repaired.

[0046] Such as figure 1 As shown, the pH detection device comprises an anode chamber pH detector 3-1, a cathode chamber pH detector 3-2, a pH detector 6, an anode chamber pH detector 3-1, a cathode chamber pH detector 3-2 and the first The automatic control device is connected with 10-1, and the pH detector 6 is connected with the second automatic control device with 10-2.

[0047] Such as image 3 As shown, the vegetation restoration layer 16 can adopt the method of selective planting, investigate the concentration of arsenic pollution in the polluted zone, and selectively plant centipede grass according to the characteristics of groundwater flow, the distribution of arsenic pollution concentration and the distribution of electric field, and the planting area is a multi-group side-by-side cross net...

Embodiment 3

[0049] Device of the present invention, concrete use method is as follows:

[0050] Step 1. Transplant centipede grass in the soil area to be repaired to form a vegetation repair layer 16. It is preferable to cultivate centipede grass in a laboratory nursery. The cultivation method is as follows: place the spore leaves of centipede grass in a petri dish for sterile cultivation, the temperature is 25°C, the light intensity is 1500~2000Lx, the light cultivation time is 10~12h / d, and transfer after germination After rooting, transplant it into peat soil for cultivation, cover it with plastic wrap for 20 days, keep it moist, and wait for the seedlings to reach 30-40 days for later use.

[0051] Step 2, electrochemical repair:

[0052] Step 2.1, turn on the power supply 1, and the voltage controller 15 controls the voltage gradient to be 3~5V / cm.

[0053] Step 2.2. The surfactant in the liquid storage tank 12 is controlled by the timing system 13 and transported to the spray pipe...

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Abstract

The invention belongs to the technical field of soil restoration, and in particular relates to a periodic composite repair device of arsenic polluted soil, the periodic composite repair device includes an electric field generating module, a vegetation restoration layer, a soil PH regulating module and a surfactant spraying module, the electric field generating module includes a power supply and an anode chamber and a cathode chamber, the anode chamber and the cathode chamber are arranged under the ground; the vegetation restoration layer is arranged on the surface layer of a to-be-repaired soil region, the restoration vegetation is ciliate desert-grass, the soil PH regulating module sprays a PH adjusting solution to the anode chamber, the cathode chamber and the to-be-repaired soil region, and the surfactant spraying module sprays a surfactant to the surfactant spraying module. Every steps are closely linked, by the manner of determination of periodic circulation on the basis of the detection value, unnecessary time and cost waste can be avoided, soil and electrode chamber PH can be regulated in real time, the ratio of an acid and alkali liquid tank can be regulated by an automatic control device, the stability is high, arsenic is repaired completely, and finally more than 98% of the arsenic can be repaired.

Description

technical field [0001] The invention belongs to the technical field of soil restoration equipment, and in particular relates to an arsenic-contaminated soil variable periodic composite restoration device. Background technique [0002] my country is one of the countries with serious arsenic pollution. In addition to chemical and agricultural production, arsenic pollution also comes from chemical weapons abandoned and buried in the ground after the Japanese invasion of China after World War II. Arsenic is a carcinogenic and teratogenic element. Pollution of water and soil will pose a huge threat to humans and the ecological environment. Therefore, various researches on arsenic removal have been carried out earlier in my country. [0003] Commonly used remediation techniques for arsenic-contaminated soil mainly include the following: [0004] 1. Stable solidification method: first analyze the pollution degree of the pollutants to be treated, and then mix the targeted treatment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 何理李小萌任丽霞卢宏玮
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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