A dynamic control method of electric field based on soil electrical parameters
An electrical parameter and soil technology, applied in the restoration of polluted soil and other directions, can solve the problems of the same proportion reduction of organic matter space, difficulty in meeting the needs of electric field engineering, spatial heterogeneity of organic pollutants, etc., to achieve dynamic space matching, solution Effects of Spatial Difference Problems
Active Publication Date: 2020-04-28
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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Embodiment 1
[0053] The contaminated soil repaired in this example is the petroleum-contaminated soil configured in the laboratory. The soil collected is clay to remove visible impurities and grass roots. The room is naturally air-dried and passed through a 2mm sieve. The petroleum is collected from a certain company in Shuguang Oil Production Plant of Liaohe Oilfield. The oil pit is prepared into 40g / kg±10g / kg oil-contaminated soil, left in natural air for 7 days, adjusted to 25% moisture content with deionized water, and loaded into an electric remediation tank (length 100cm×width 100cm×height 15cm).
[0054] In this embodiment, the electric field dynamic control method based on soil electrical parameters, the specific implementation steps are ( figure 1 ): 1) Measure the concentration field of pollutants in organic contaminated soil, determine the location and polarity of the electrode; 2) Calculate the input voltage according to the pollutant concentration classification and soil electrica...
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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 remediation technology for organic contaminated soil, in particular to an electric field dynamic control method based on soil electrical parameters. Background technique [0002] Electric method to repair organic contaminated soil is a new emerging technology, which is to insert a pair of electrodes into the contaminated soil and apply a weak direct current to form an electric field. Under the combined action of electrochemical reaction and electrokinetic effect, it can effectively remove organic pollutants in the soil. [0003] In the previous research, using M×N matrix electrode arrangement and periodic polarity switching, a uniform electric field was constructed (ZL200510130710.7, ZL201110203862.0). 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 superimposed electric field is difficult ...
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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