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Method for efficiently repairing petroleum hydrocarbon pollution of soil

A technology for remediating soil and petroleum hydrocarbons, applied in the field of soil pollution remediation, can solve problems such as failure to meet economic and environmental requirements, difficulty in engineering construction control, and low activation efficiency, so as to improve activation efficiency, ease reaction, and reduce risks Effect

Pending Publication Date: 2021-08-27
广州穗土环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of engineering application, the activation efficiency is low, it is easy to cause secondary pollution, and engineering construction control is difficult, so it cannot meet the requirements of economy and environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for efficiently remediating soil petroleum hydrocarbon pollution, comprising the steps of:

[0021] S1. First, remove large particles from the polluted soil through a 400-mesh filter, put the screened polluted soil, sodium persulfate and quicklime into the mixer, and adjust the speed of the device to 120r / min by starting the device. Mix the mixture well;

[0022] S2, then close the device, take out the internal mixture, place the mixture inside the beaker, and place the mixed soil inside the curing device for curing;

Embodiment 2

[0024] A method for efficiently remediating soil petroleum hydrocarbon pollution, comprising the steps of:

[0025] S1. First, remove large particles from the polluted soil through a 420-mesh filter screen, put the screened polluted soil, sodium persulfate and quicklime into the mixer, and adjust the speed of the device to 130r / min by starting the device. Mix the mixture well;

[0026] S2. Then close the device, take out the internal mixture, place the mixture inside the beaker, and place the mixed soil inside the curing device for curing.

Embodiment 3

[0028] A method for efficiently remediating soil petroleum hydrocarbon pollution, comprising the steps of:

[0029] S1. First, remove large particles from the polluted soil through a 450-mesh filter screen, put the screened polluted soil, sodium persulfate and quicklime into the mixer, and adjust the speed of the device to 140r / min by starting the device. Mix the mixture well;

[0030] S2. Then close the device, take out the internal mixture, place the mixture inside the beaker, and place the mixed soil inside the curing device for curing.

[0031] In summary: the present invention is a method for efficiently remediating soil petroleum hydrocarbon pollution. Calcium oxide reacts with water to generate calcium hydroxide, and the reaction process releases a large amount of heat. Because calcium hydroxide is strongly alkaline, quicklime can activate sodium persulfate. At the same time, it provides the complementary activation effect of alkali activation and heat activation, Na ...

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Abstract

The invention discloses a method for efficiently repairing petroleum hydrocarbon pollution of soil. The method comprises the following steps of cleaning, mixing and maintaining. Calcium oxide reacts with water to generate calcium hydroxide, and a large amount of heat is released in the reaction process; due to the fact that calcium hydroxide is strongly alkaline, sodium persulfate activated by quick lime can provide the complementary activation effect of alkali activation and thermal activation at the same time; Na2S2O8 reacts with OH <-> in a liquid phase to generate OH<2->, then Na2S2O8 reacts with S2O8<2-> to cause-O-O-bond breakage to generate SO4 <->.; SO4 <-> is mainly produced under acidic and neutral conditions (pH = 2-7) and is relatively stable in a solution; in a solution having a pH greater than 8.5, SO4 <-> oxidizes water or OH <-> to gradually produce OH. with an increase in proportion, while in an alkaline solution (pH greater than 12), OH. is mainly produced; and because the oxidizability of OH. is stronger than that of SO4 <->, the-O-O-bond is broken to cause the production of SO4<->., and the oxidation of pollutants is realized.

Description

technical field [0001] The invention relates to the technical field of soil pollution remediation, in particular to a method for efficiently remediating soil petroleum hydrocarbon pollution. Background technique [0002] Chemical oxidation technology is to add / inject chemical oxidants into the soil, and through oxidation, the pollutants in the soil are oxidized into non-toxic or less toxic substances. In recent years, chemical oxidation technology has made great progress in the application of organic contaminated soil, showing a significant remediation effect. The selection of a suitable oxidant is one of the key factors to determine the efficiency of soil remediation. The chemical oxidants currently used in the degradation of organic pollutants include Fenton's reagent, O3, potassium permanganate, activated persulfate, etc. [0003] At this stage, more activators are mainly used, such as ferrous sulfate and sodium hydroxide. In terms of engineering application, the activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 李子恒赖安许保江黄伟棋贾存仙梁建源胡千娟
Owner 广州穗土环保工程有限公司
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