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Electric field dynamic regulating and controlling method based on soil electrical parameters

An electrical parameter and electric field technology, applied in the field of electric field dynamic regulation based on soil electrical parameters, can solve the problems of the same proportion reduction of organic matter space, difficulty in meeting electric field engineering requirements, spatial heterogeneity of organic pollutants, etc., and solve the problem of spatial difference. , to achieve the effect of dynamic space matching

Active Publication Date: 2018-04-06
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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Problems solved by technology

However, due to the actual remediation process, the concentration field of organic pollutants in the soil has significant spatial heterogeneity.
Therefore, a simple uniform electric field or a superimposed electric field is difficult to satisfy the space-proportional reduction of organic matter.
Although there were previous studies on the compensation of field strength using various types of electrode layouts (20161044173.X, 201610137627.0), which locally changed the electric field distribution and achieved rapid reduction of high-concentration areas of organic pollutants, but these did not take into account the soil The attenuation effect of electrical parameters such as conductivity, moisture content, and pH on the actual engineering electric field, and the soil electrical parameters change dynamically with the electric restoration process
The existing electric field construction methods are difficult to meet the engineering needs of matching the electric field and the concentration field

Method used

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  • Electric field dynamic regulating and controlling method based on soil electrical parameters
  • Electric field dynamic regulating and controlling method based on soil electrical parameters

Examples

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Embodiment 1

[0053] The contaminated soil repaired in this example is the oil-contaminated soil configured in the laboratory. The soil collected is clay, and the impurities and grass roots that are visible to the naked eye are removed. After being naturally air-dried in the room, it passes through a 2mm sieve. The oil pit was prepared into 40g / kg ± 10g / kg of oil-contaminated soil, left to air dry for 7 days, and the moisture content was adjusted to 25% with deionized water. 15cm).

[0054] The electric field dynamic regulation method based on soil electrical parameters in the present embodiment, the specific implementation steps are ( figure 1): 1) Measure the concentration field of pollutants in organic polluted soil, and determine the electrode layout position and polarity; 2) Calculate the input voltage according to the pollutant concentration classification and soil electrical parameters; 3) Based on the changes of soil electrical parameters, dynamic regulation The spatial distributio...

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Abstract

The invention relates to an electric field dynamic regulating and controlling method based on soil electrical parameters. The electric field dynamic regulating and controlling method comprises the following steps that a concentration field of contaminants in organic contaminated soil is measured, and the electrode distributing position and polarity are determined; the size of input voltage is calculated according to contaminant concentration grading and the soil electrical parameters; and spatial distribution of an electric field is dynamically regulated and controlled based on changes of thesoil electrical parameters, and the matching degree between the electric field and the contaminant concentration field is kept. The electric field dynamic regulating and controlling method based on the soil electrical parameters effectively solves the problem of spatial difference of the electric repairing project efficiency of the organic contaminated soil, and improves the overall project repairefficiency of electric repairing.

Description

technical field [0001] The invention relates to a restoration technology for organically polluted soil, in particular to a method for dynamic regulation of electric field based on soil electrical parameters. Background technique [0002] The electrokinetic method for remediating organic contaminated soil is an emerging technology. Paired electrodes are inserted into the contaminated soil and a weak direct current is applied to form an electric field. Under the combined action of electrochemical reaction and electrokinetic effect, organic pollutants in soil can be effectively removed. [0003] In the previous research, a full-coverage uniform electric field was constructed by using M×N matrix electrode arrangements and periodic polarity switching (ZL200510130710.7, ZL201110203862.0). However, due to the actual remediation process, the concentration field of organic pollutants in soil has significant spatial heterogeneity. Therefore, it is difficult for a simple uniform elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/085B09C2101/00
Inventor 郭书海吴波王加宁王慧王卅
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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