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Method for repairing dichlorobenzene contaminated soil environment by using non-uniform electrokinetics-persulfate oxidation combination method

A technology of persulfate oxidation and electrokinetics, applied in the field of remediation of dichlorobenzene-contaminated soil environment, can solve problems such as further improvement of remediation efficiency, curing and acidification of remediation sites, electrode polarization, etc., and achieve ideal remediation effect, engineering The effect of small amount and small pH change

Active Publication Date: 2015-02-04
重庆地大工业技术研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although this process has high treatment efficiency, it is prone to solidification and acidification of the repaired site, electrode polarization and increased energy consumption, and the repair efficiency needs to be further improved

Method used

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  • Method for repairing dichlorobenzene contaminated soil environment by using non-uniform electrokinetics-persulfate oxidation combination method
  • Method for repairing dichlorobenzene contaminated soil environment by using non-uniform electrokinetics-persulfate oxidation combination method
  • Method for repairing dichlorobenzene contaminated soil environment by using non-uniform electrokinetics-persulfate oxidation combination method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: remediation of dichlorobenzene contaminated soil (group f) with heterogeneous electrokinetics-persulfate combined technology

[0029] according to figure 1 As shown, prepare the heterogeneous electrokinetics-persulfate oxidation combined method restoration device, the heterogeneous electrokinetics-persulfate oxidation combined method repair device includes an electrokinetic reaction column 1, and first electrodes arranged on both sides of the electrokinetic reaction column Chamber 2 and the second electrode chamber 3, the body of the electrokinetic reaction column is cylindrical (Φ6.0cm*10.0cm) with both ends open, and the first electrode chamber and the second electrode chamber are connected with the electrokinetic reaction column A cylinder with an inner opening with matching diameters, liquid inlet holes 10 and exhaust holes 11 are opened on the cylinder walls of the first electrode chamber and the second electrode chamber, and the electrokinetic reacti...

Embodiment 2

[0035] Embodiment 2: use heterogeneous electrokinetics-persulfate combined technology and switch electrode polarity method to remediate dichlorobenzene polluted soil (g group)

[0036] This embodiment is basically the same as Embodiment 1, except that the positive and negative poles of the pair of electrodes are switched every 12 hours during the restoration process, thereby forming a constantly changing non-uniform electric field to restore the contaminated soil.

[0037] The results are shown in Table 1 and image 3 .

[0038] Result shows, 1. the present invention can drive persulfate to enter soil by adopting columnar iron electrode to form non-uniform electric field, promotes the migration of persulfate, and persulfate migration is obvious in catholyte, accelerates the remediation of polluted soil. Under the condition of switching the electrode polarity (Example 2), the heterogeneous electrokinetics-persulfate combined technology can promote the migration of persulfate i...

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Abstract

The invention relates to a method for repairing dichlorobenzene contaminated soil environment by using a non-uniform electrokinetics-persulfate oxidation combination method. The method comprises the following steps: providing a non-uniform electrokinetics-persulfate oxidation combination method repairing device; detaching a first electrode chamber, a second electrode chamber, a first isolation block and a second isolation block at the two sides of an electric reaction column according to demand, uniformly filling the electric reaction column with soil to be repaired, then assembling the repairing device, adding persulfate solution as electrode solution into the first electrode chamber and the second electrode chamber through liquid inlet holes, keeping the liquid levels of the two electrode chambers to be parallel, standing, and after the hydraulic power of the entire system is stable, applying a DC power supply between two columnar ion electrodes to repair the contaminated soil under the action of the formed non-uniform electric field. The method can be used for achieving efficient in situ repair of the dichlorobenzene contaminated soil and can be used for avoiding the common problems of electrode polarization and formation of an acidic band in the uniform electric field technology.

Description

technical field [0001] The invention relates to a method for repairing dichlorobenzene-contaminated soil environment by using a combined method of heterogeneous electrokinetics and persulfate oxidation, which belongs to the technical field of environmental protection. Background technique [0002] Dichlorobenzene is mainly used in many industrial fields such as dyes, medical treatment, rubber, pesticides, coatings, light industry, and chemical industry. Its wide application also makes it a major pollutant in environmental pollution. Its release routes can include the following aspects (1) Synthesis and production: discharge into the environment with waste water, waste gas and waste residue; (2) Raw materials or products: spillage and release of pesticides, medicines, etc. during use; (3) Solid waste disposal in cities: incineration or release of fly ash, slag and leachate containing dichlorobenzene during other disposal processes. [0003] The harm of dichlorobenzene to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
Inventor 郝义国宋萌萌
Owner 重庆地大工业技术研究院有限公司
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