Hydrothermal Fenton oxidation remediation method for organic matter contaminated soil

A technology of polluted soil and Fenton oxidation, which is applied in the field of soil remediation, can solve problems such as chemical residues and complicated processes, and achieve the effects of reducing usage, shortening process flow, and facilitating stacking and processing

Pending Publication Date: 2020-06-09
中冶成都勘察研究总院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to solve the problems of complex process and chemical residues in the restoration process of organic matter, the present invention provides a hydrothermal Fenton oxidation restoration method for organic matter polluted soil

Method used

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  • Hydrothermal Fenton oxidation remediation method for organic matter contaminated soil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The repairing method of the present embodiment comprises the steps:

[0045] (1) Send the polluted soil to the screening equipment for screening to remove the construction waste with a particle size larger than 50mm, and send the polluted soil after removing the construction waste to the crushing equipment for crushing to obtain fine-grained polluted soil with a particle size of ≤25mm;

[0046] (2) Add Fenton's reagent solution to the fine-grained contaminated soil, the weight percentage of the Fenton's reagent solution and the fine-grained soil is 2.0; medicinal soil;

[0047] (3) Put the dosing soil in the hydrothermal reaction device, close the hydrothermal reaction device, raise the temperature of the sealed hydrothermal reaction device to 120 ° C, seal and keep it for 18 hours, and obtain the repaired soil that meets the standard.

[0048] In this example, the H in Fenton's reagent solution 2 o 2 The concentration is 50g / L~300 g / L, FeSO 4 The concentration is 4...

Embodiment 2

[0050] The repairing method of the present embodiment comprises the steps:

[0051] (1) Send the polluted soil to the screening equipment for screening to remove the construction waste with a particle size larger than 50mm, and send the polluted soil after removing the construction waste to the crushing equipment for crushing to obtain fine-grained polluted soil with a particle size of ≤25mm;

[0052] (2) Add Fenton's reagent solution to the fine-grained contaminated soil, the weight percentage of the Fenton's reagent solution and the fine-grained soil is 35; medicinal soil;

[0053] (3) Put the dosing soil in the hydrothermal reaction device, close the hydrothermal reaction device, raise the temperature of the sealed hydrothermal reaction device to 450°C, seal and keep it warm for 0.5h, and obtain the repaired and qualified soil.

[0054] In this example, the H in Fenton's reagent solution 2 o 2 The concentration is 50 g / L, FeSO 4 The concentration is 40g / L.

Embodiment 3

[0056] The repairing method of the present embodiment comprises the steps:

[0057] (1) Send the polluted soil to the screening equipment for screening to remove the construction waste with a particle size larger than 50mm, and send the polluted soil after removing the construction waste to the crushing equipment for crushing to obtain fine-grained polluted soil with a particle size of ≤25mm;

[0058] (2) Add Fenton's reagent solution to the fine-grained contaminated soil, the weight percentage of the Fenton's reagent solution and the fine-grained soil is 10; medicinal soil;

[0059] (3) Put the dosing soil in the hydrothermal reaction device, close the hydrothermal reaction device, raise the temperature of the sealed hydrothermal reaction device to 250 ° C, seal and keep it for 7 hours, and obtain the repaired soil that meets the standard.

[0060] In this example, the H in Fenton's reagent solution 2 o 2 The concentration is 300 g / L, FeSO 4 The concentration is 450 g / L. ...

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Abstract

The invention belongs to the technical field of soil remediation, discloses a hydrothermal Fenton oxidation remediation method for organic matter contaminated soil, and aims to solve the problems of complex process and drug residue in the remediation process of organic matters. Compared with the prior art, the method has the advantages that a Fenton reagent solution can fully react with organic matters, so that the use amount of the Fenton reagent solution is reduced, and the secondary pollution of the medicament is reduced. According to the method, the oxidation reaction and hydrothermal oxidation reaction of the Fenton reagent solution and the organic matter are directly fused together to complete soil remediation operation, compared with the prior art, the technological process is greatly shortened, and engineering application and popularization are facilitated.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a method for hydrothermal Fenton oxidation remediation of soil polluted by organic matter, and is particularly suitable for standard remediation of soil polluted by organic solvents, petroleum hydrocarbons, polycyclic aromatic hydrocarbons, benzene series and pesticides. Background technique [0002] With the rapid economic development, a large number of land resources are polluted, and the treatment of polluted soil is also one of the important tasks at present. In polluted soil, the removal and remediation of organic matter is the difficulty of soil treatment. In particular, refractory organic substances such as polycyclic aromatic hydrocarbons, dioxins, and pesticides are difficult to remediate contaminated soil. [0003] Petroleum hydrocarbons: hydrocarbons in petroleum, hydrocarbons are hydrocarbons, accounting for the vast majority of petroleum, about ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/06
CPCB09C1/06B09C1/08
Inventor 杨健彭涛李钦韬王建伟何剑奇
Owner 中冶成都勘察研究总院有限公司
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