In-situ chemical oxidation remediation method for soil contaminated by benzene series

An in-situ chemical oxidation and polluted soil technology, which is applied in the field of in-situ chemical oxidation of soil, can solve the problems of high disposal cost, high disposal cost, soil loss of function, etc., to prolong effective reaction time, save restoration input cost, and high The effect of redox potential

Inactive Publication Date: 2021-02-23
NANJING GW ENVIRONMENT ENG
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Soil remediation technology is divided into in-situ remediation and ex-situ remediation according to the location of soil remediation. The disadvantage of in-situ remediation is the disposal of "three wastes" during the remediation process, while the disadvantage of ex-situ remediation is that the disposal cost is high an

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  • In-situ chemical oxidation remediation method for soil contaminated by benzene series
  • In-situ chemical oxidation remediation method for soil contaminated by benzene series

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0053]Example 1:

[0054]A chemical pollution site, the contaminant is mainly benzene (11.5 mg / kg), toluene (30.5 mg / kg), o-xylene (3.2 mg / kg), amybenylene (4.7 mg / kg), ethyl (1.7 mg) / kg), pollution depth is 8m, pollution area is 40000m2The venue is open and flat, and the inner soil layer is mainly the soil, and the sanding. Try test was carried out by simulating field conditions, determined that the soil repair agent was combined into hydrogen peroxide, ferrous mixed reagent, and injected in the implantation. The minor test results show that after multiple recycled chemical oxidation, the concentration of each contaminant is as follows: benzene (0.4 mg / kg), toluene (2.7 mg / kg), xylene (0.3mg / kg), amylobenyl (0.2 mg / kg), ethyl (0.1 mg / kg).

[0055]Simulated Test Test, take 10g of the contaminated soil sample 10g into the conical bottle, add 50ml of water, add 30% H in the conical bottle, respectively.2O230% h2O2+ FESO4NA2S2O8Different soil repair agents, detect the con...

Example Embodiment

[0060]Example 2:

[0061]A chemical plant leakage leads to surrounding soil pollution, the contaminants are mainly benzene (7.3 mg / kg), toluene (1.4 mg / kg), styrene (21.5 mg / kg), contamination depth 6m, pollution area 15000m2The venue structure is dense, and the inner soil layer is mainly from the soil, siltas clay. Try test is carried out by simulating field conditions, determined that the soil repair agent is combined into hydrogen peroxide, ferrous sulfate, sodium sulfate mixing reagent, injecting a well point injection and injection injecting combination. The small test results show that after multiple recycled chemical oxidation, the concentration of each contaminant is as follows: benzene (0.3 mg / kg), toluene (0.4 mg / kg), styrene (2.6 mg / kg).

[0062]Simulated Test Test, take 10g of the contaminated soil sample 10g into the conical bottle, add 50ml of water, add 30% H in the conical bottle, respectively.2O230% h2O2+ FESO4NA2S2O8Different soil repair agents, detect the co...

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Abstract

The invention relates to an in-situ chemical oxidation remediation method for soil contaminated by benzene series. The method comprises the following steps: injecting a soil remediation agent, carrying out ex-situ treatment after extraction and conducting periodic monitoring. After the injected soil remediation agent is in full contact with pollutants adsorbed on soil particles in a contaminated soil layer under the action of underground water runoff, permeation and hydraulic gradient, the pollutants are degraded into low-molecular simple organic matters by utilizing relatively high oxidation-reduction potential of the soil remediation agent, so the in-situ chemical oxidation remediation method for the soil contaminated by benzene series is realized.

Description

technical field [0001] The invention relates to an in-situ chemical oxidation restoration method for soil polluted by benzene series, and belongs to the field of in-situ chemical oxidation methods for soil. Background technique [0002] Benzene series is a general term for benzene and its derivatives. Common benzene series include benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, and styrene. Benzene series are not only fuel oil components, but also widely used chemical raw materials. Due to the industrial wastewater discharged from petrochemical, pesticide, organic chemical, coking chemical and other industries contains a lot of benzene series, they become organic pollutants in rivers, air and groundwater. important source of pollutants. The benzene series pollution in the soil mainly comes from the discharge of industrial and domestic sewage, the leakage of petroleum and chemical solvents, and the benzene series attached to the atmosphere and particulate matte...

Claims

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Application Information

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IPC IPC(8): B09C1/08C09K17/02
CPCB09C1/08C09K17/02B09C2101/00
Inventor 韩正昌马军军卜旭凌陶志慧朱家明张寿兵周啸
Owner NANJING GW ENVIRONMENT ENG
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