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Fenton reagent in-situ injection restoration method

A restoration method, the technology of Fenton's reagent, is applied in the field of environmental restoration to achieve the best restoration effect, improve restoration effect, and reduce drug loss.

Inactive Publication Date: 2017-11-21
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the deficiencies in the prior art when Fenton reagents are used to restore contaminated soil and groundwater, the present invention provides a Fenton reagent in-situ injection repair method, which reduces the drug and dosage of Fenton reagents by means of drill pipe sub-chambers Loss, so as to ensure the best drug properties when the agent reacts with pollutants, expand the scope of application of Fenton's reagent in in situ injection repair, and improve its repair effect

Method used

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  • Fenton reagent in-situ injection restoration method

Examples

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Effect test

Embodiment 1

[0043] Such as figure 1 Shown, a kind of Fenton's reagent in situ injection restoration method of the present embodiment, this method is to adopt syringe pump 3 to inject H 2 o 2 and the catalyst are injected into different injection chambers in the injection drill pipe 5, and then sprayed into the soil or groundwater to be repaired through different injection chambers, so that H 2 o 2 And the catalyst is mixed while in contact with the pollutant, and reacts to produce an oxidation system mainly composed of OH. In this example, H 2 o 2 and catalyst are injected into polluted soil or groundwater respectively, so that H 2 o 2 And when the catalyst is in contact with the pollutants, the remixing reaction produces mainly OH and other oxidizing substances such as H 2 o 2 , Fe 3+ 、HO 2 ·, O 2 Equal oxidation system, thus overcoming the problem that Fenton's reagent needs to be prepared on site in the prior art, and then when the prepared reagent is injected into the pollu...

Embodiment 2

[0045] Such as figure 1 Shown, a kind of Fenton's reagent in situ injection restoration method of the present embodiment, this method is to adopt syringe pump 3 to inject H 2 o 2 and the catalyst are injected into different injection chambers in the injection drill pipe 5, and then sprayed into the soil or groundwater to be repaired through different injection chambers, so that H 2 o 2 And the catalyst is mixed while in contact with the pollutant, and reacts to produce an oxidation system mainly composed of OH. Such as Figure 2-Figure 4 As shown, the injection pump 3 of this embodiment includes a first injection pump 301 and a second injection pump 302, and the injection drill rod 5 is provided with a first injection chamber 23 and a second injection chamber 24 separated from each other. The rod 5 is provided with two sets of injection ports respectively communicating with the first injection chamber 23 and the second injection chamber 24, and the liquid inlet of the firs...

Embodiment 3

[0052]A kind of Fenton's reagent in-situ injection repairing method of this embodiment, its process is basically the same as embodiment 2, and its difference is: in this embodiment, the injection port that communicates with the first injection chamber 23 is set downwards, and the second injection port The injection port connected to the cavity 24 is set upwards, and its height is lower than the height of the injection port connected to the first injection chamber 23, so that the two medicaments can be mixed quickly after being injected into the polluted body, and the uniformity of the two medicaments is ensured at the same time. . The number of two groups of injection ports can be set to 2-5 according to the actual situation. In this embodiment, 2 are used, and high-pressure nozzles are fixed in the two groups of injection ports, and the injection ports connected to the first injection chamber 23 are welded There is a first nozzle 22 , and a second nozzle 25 is welded in the i...

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Abstract

The invention discloses a Fenton reagent in-situ injection restoration method, and belongs to the technical field of environmental restoration. According to the Fenton reagent in-situ injection restoration method, H2O2 and a catalyst are respectively injected into different spraying cavities of an injection drilling pipe by adopting an injection pump, and then the H2O2 and the catalyst are injected into to-be-restored earth or underground water through the different spraying cavities, so that the H2O2 and the catalyst are mixed while being in contact with pollutants, and reaction is conducted to produce an oxidation system mainly with .OH. According to the Fenton agent in-situ injection restoration method, the problem that a Fenton reagent is prone to losing the best drug property can be solved effectively, it is ensured that the reagent has the best drug property while being in contact and reacting with the pollutants, and thus the effect of in-situ restoration is improved.

Description

technical field [0001] The invention belongs to the technical field of environmental remediation, and more specifically relates to an in-situ remediation process for soil and groundwater pollution. Background technique [0002] With the rapid development of the economy, the use of a large number of chemical substances has caused soil and groundwater pollution to varying degrees. And due to the leaching of rainwater and the fluctuation of groundwater level, it will also cause cross-contamination of soil and groundwater. In general, typical pollutants in soil and groundwater are inorganic and organic pollution, including NO 3 - , NH 4 + , heavy metals Pb, Cr, As, benzene series, petroleum hydrocarbons, polychlorinated biphenyls, pesticides, etc. These pollutants are often highly toxic and carcinogenic, so it is necessary to remediate these polluted soil and groundwater through reasonable technical means. [0003] At present, there are two types of soil and groundwater re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08C02F1/72C02F103/06
CPCB09C1/002B09C1/08C02F1/722C02F1/725C02F2103/06C02F2305/026
Inventor 王磊陈樯石佳奇黄剑波龙涛尹业新徐敏李宁李耀辉
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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