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A method for remediation of organic pollutant-heavy metal compound polluted soil

A technology of organic pollutants and compound pollution, which is applied in the field of remediation of organic pollutants-heavy metal compound polluted soil, can solve the problems of polluted soil, achieve the effect of enhanced chemical activity, good soil remediation effect, and improvement of soil loose state

Inactive Publication Date: 2021-06-22
DEZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The soil remediation agent in this solution can remediate organic pollution and remove heavy metal ions in the soil, but the soil remediation agent contains too much organic matter and has the problem of polluting the soil

Method used

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  • A method for remediation of organic pollutant-heavy metal compound polluted soil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The remediation method of the organic pollutant-heavy metal compound polluted soil of the present embodiment comprises the steps of: adding 1.5% modified chitosan accounting for soil dry weight in the organic pollutant-heavy metal compound polluted soil, and turning over the polluted soil Plow, mix the modified chitosan with the soil evenly, then add water, irrigate the soil thoroughly, and then apply active coal gangue powder with 1% of the dry weight of the soil, mix the active coal gangue powder with the soil evenly, and realize the removal of organic pollutants -Effective remediation of heavy metal compound polluted soil.

[0039] Among them, specifically include the following steps:

[0040](1) Loosen the organic pollutant-heavy metal compound polluted soil, apply modified chitosan, and plow the soil, so that the modified chitosan is mixed with the soil;

[0041] (2) Add water again, pour the polluted soil containing modified chitosan thoroughly, water every day d...

Embodiment 2

[0059] The remediation method of the organic pollutant-heavy metal compound polluted soil of the present embodiment comprises the steps of: adding 4.5% modified chitosan accounting for soil dry weight in the organic pollutant-heavy metal compound polluted soil, and turning over the polluted soil Plow, mix the modified chitosan with the soil evenly, then add water, irrigate the soil thoroughly, and then apply active coal gangue powder with 4% dry weight of the soil, mix the active coal gangue powder with the soil evenly, and realize the removal of organic pollutants -Effective remediation of heavy metal compound polluted soil.

[0060] Among them, specifically include the following steps:

[0061] (1) Loosen the organic pollutant-heavy metal compound polluted soil, apply modified chitosan, and plow the soil, so that the modified chitosan is mixed with the soil;

[0062] (2) add water again, the polluted soil that will contain modified chitosan is irrigated thoroughly, water ev...

Embodiment 3

[0080] The remediation method of the organic pollutant-heavy metal compound polluted soil of the present embodiment comprises the steps of: adding 3.0% modified chitosan accounting for soil dry weight in the organic pollutant-heavy metal compound polluted soil, and turning over the polluted soil Plow, mix the modified chitosan with the soil evenly, then add water, irrigate the soil thoroughly, and then apply active coal gangue powder with a dry weight of 2.5% of the soil, mix the active coal gangue powder with the soil evenly, and realize the removal of organic pollutants -Effective remediation of heavy metal compound polluted soil.

[0081] Among them, specifically include the following steps:

[0082] (1) Loosen the organic pollutant-heavy metal compound polluted soil, apply modified chitosan, and plow the soil, so that the modified chitosan is mixed with the soil;

[0083] (2) add water again, the polluted soil that will contain modified chitosan is irrigated thoroughly, w...

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Abstract

The present invention relates to the technical field of soil remediation, in particular to a method for remediating organic pollutant-heavy metal compound polluted soil, comprising the following steps: adding modified chitosan to organic pollutant-heavy metal compound polluted soil, and carrying out the polluted soil Plow tillage to mix the modified chitosan with the soil evenly, then add water, irrigate the soil thoroughly, and then apply the active coal gangue powder, mix the active coal gangue powder with the soil evenly, and realize the compound pollution of organic pollutants and heavy metals effective repair. The invention can effectively degrade the organic pollutants in the polluted soil and passivate the heavy metals in the soil, so as to achieve the purpose of repairing the soil, and the repairing period is short.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for remediating organic pollutant-heavy metal composite polluted soil. Background technique [0002] Soil refers to the loose surface layer on the land surface that is fertile and capable of growing plants. Its thickness is generally about 2m. The soil not only provides mechanical support for plant growth, but also provides water, fertilizer, air, heat, etc. for plant growth and development. Fertility elements are also the basis of human activities. However, with the rapid development of social economy and industry, solid wastes are continuously stacked and dumped on the soil surface, harmful waste water is continuously infiltrated into the soil, and harmful gases and floating dust in the atmosphere are constantly falling into the soil with rainwater, resulting in soil pollution. , and soil pollution is becoming more and more serious. [0003] Existing soil po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00
Inventor 段晓尘付修勇刘富刚唐艳刘芬井大炜范晓宁
Owner DEZHOU UNIV
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