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Method for determining the amount of quicklime added in the treatment of organic polluted soil and the treatment method for organic polluted soil

A technology of organic pollution and treatment method, applied in the restoration of polluted soil, etc., can solve the problems of easy blockage of thermal desorption device, easy damage of thermal desorption device, poor soil remediation effect, etc., so as to reduce moisture content and avoid damage. Thermal desorption device, the effect of improving the repair effect

Active Publication Date: 2022-05-27
云南省环境科学研究院(中国昆明高原湖泊国际研究中心)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Red soil has strong viscosity and high moisture content, so it is very easy to block the thermal desorption device when it is thermally desorbed, which not only has poor repair effect on the soil, but also easily damages the thermal desorption device, and the treatment cost is high

Method used

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  • Method for determining the amount of quicklime added in the treatment of organic polluted soil and the treatment method for organic polluted soil
  • Method for determining the amount of quicklime added in the treatment of organic polluted soil and the treatment method for organic polluted soil
  • Method for determining the amount of quicklime added in the treatment of organic polluted soil and the treatment method for organic polluted soil

Examples

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Effect test

Embodiment 1

[0068] A method for determining the addition amount of quicklime in the treatment of organic contaminated soil, comprising:

[0069] (a) Add different amounts of quicklime to the organic polluted soil with different initial moisture content, and after the reaction, detect the final soil moisture content and soil pH, and obtain the relationship between the added amount of quicklime and the final soil moisture content, and the addition of quicklime The relationship between amount and soil pH.

[0070] The organic polluted soil is red soil, and the physical and chemical properties of red soil: the soil type is cohesive red soil, of which kaolin accounts for 66.05%, Fe 2 O 3 It accounts for 20.27%, and the chemical elements are mainly Fe, Si and Al, accounting for 32.09%, 25.02%, and 24.02% respectively. The above proportions refer to mass percentages, and the pH value is 6.4-6.7; total petroleum hydrocarbons (C10-C40 ), naphthalene, acenaphthene, benzo[a]anthracene, benzo[b]flu...

Embodiment 2

[0079] A method for treating organically polluted red soil, comprising: firstly measuring the initial moisture content of the organically polluted red soil, then obtaining an optimum addition amount of quicklime according to the method of Example 1, mixing the optimum amount of quicklime with the organic polluted soil and reacting, and finally thermal desorption treatment.

[0080] The initial moisture content of the organic polluted red soil is 23%-35%. According to the prediction model of Example 1, the addition amount of quicklime is 1.2%-5.4%. Considering the cost and the target value of restoration, it is determined that the addition amount of quicklime in the pilot scale is 1.5%. -2%.

[0081] The polluted soil initially collected and transferred in this pilot test is about 300 m 3 , divided into 150m 3 of lightly polluted soil and 150m 3of heavily polluted soil. Among them, the main pollutants in the heavily polluted soil were petroleum hydrocarbons and polycyclic a...

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Abstract

The invention relates to a method for determining the amount of quicklime added in the treatment of organic polluted soil and a treatment method for organic polluted soil. The method for determining the amount of quicklime added in the treatment of organic polluted soil comprises: (a) adding quicklime in different amounts to organic polluted soils with different initial moisture contents, after the reaction, detecting the final moisture content of the soil and soil pH to obtain quicklime The relationship between the addition amount and the final soil moisture content and soil pH; (b) according to the above relationship, the required soil moisture content and the required soil pH, a prediction model for the optimal addition of quicklime is constructed to obtain organic Optimum quicklime addition to polluted soil. The method is scientific and rigorous, and the amount of quicklime obtained is reasonable. After adding this specific amount of quicklime to organic polluted soil, it can effectively reduce its moisture content and prevent it from clogging the thermal desorption device during thermal desorption treatment, for example. Improve the effect of soil restoration.

Description

technical field [0001] The invention relates to the field of thermal desorption and remediation of polluted soil, in particular to a method for determining the amount of quicklime added in the treatment of organic polluted soil and a method for treating organic polluted soil. Background technique [0002] With the adjustment of my country's economic structure and the country's emphasis on environmental protection, many polluted sites left by the relocation of chemical plants are often developed and utilized as schools, housing and commercial land, etc. The need is a more rapid and efficient ectopic thermal desorption repair technology. The red soil has strong viscosity and high water content, and it is very easy to block the thermal desorption device when it is thermally desorbed. [0003] In view of this, the present invention is proposed. SUMMARY OF THE INVENTION [0004] The first object of the present invention is to provide a method for determining the amount of quic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/06
CPCB09C1/00B09C1/06
Inventor 和丽萍陈异晖杨伟光李丽娜魏中华王苗和淑娟李敏敏崔灿文
Owner 云南省环境科学研究院(中国昆明高原湖泊国际研究中心)