Method for repairing polluted sites

A technology for site remediation and contaminated soil, applied in the field of contaminated site remediation, can solve the problems of difficult and fast remediation, secondary pollution, limited pollutant removal, etc., and achieve the goal of increasing full contact, reducing remediation cost, and fast and efficient remediation Effect

Inactive Publication Date: 2019-05-17
湖南新九方科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, incineration and rotary kiln co-processing have high energy consumption, and usually require long-distance transshipment, and the problem of secondary pollution is more prominent; although the cost of steam extraction and thermal desorption is lower than that of incineration and rotary kiln, the volatility of organochlorine pesticides is usually Poor, the effect of steam extraction is not good, thermal desorption requires high energy consumption and solves the problems of tail gas treatment and se

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] This example provides a method for remediation of contaminated sites. The steps include:

[0029] (1) Select the soil of the contaminated site, prepare the pollutant microbial culture medium, select and cultivate the microbial strains that can effectively treat the organic pollutants in the soil, and obtain a mixed microbial broth after separation and purification;

[0030] (2) Add water to the contaminated soil to make a muddy soil mixed solution and adjust the pH value;

[0031] (3) Add the mixed microbial liquid, surfactant, potassium ferrate and hydrogen peroxide obtained in step (1) to the mixed solution of step (2), and let stand after ultrasonic treatment.

[0032] Wherein, the solid-liquid ratio of the contaminated soil and water in step (2) is 1:3, and the pH range is 5.

[0033] The surfactant in step (3) is a mixture of saponin and activated carbon in a mass ratio of 1:1. The mass ratio of mixed microbial liquid, surfactant, potassium ferrate and hyd...

Example Embodiment

[0034] Example 2

[0035] This example provides a method for remediation of contaminated sites. The steps include:

[0036] (1) Select the soil of the contaminated site, prepare the pollutant microbial culture medium, select and cultivate microbial strains that can effectively treat the organic pollutants in the soil, and obtain a mixed microbial broth after separation and purification;

[0037] (2) Add water to the contaminated soil to make a muddy soil mixed solution and adjust the pH value;

[0038] (3) Add the mixed microbial liquid, surfactant, potassium ferrate and hydrogen peroxide obtained in step (1) to the mixed solution of step (2), and let stand after ultrasonic treatment.

[0039] Wherein, the solid-liquid ratio of the contaminated soil and water in step (2) is 1:5, and the pH range is 7.

[0040] The surfactant in step (3) is a mixture of saponin and activated carbon in a mass ratio of 1:1. The mass ratio of the mixed microbial liquid, surfactant, potassium ferrate and hyd...

Example Embodiment

[0041] Example 3

[0042] This example provides a method for remediation of contaminated sites. The steps include:

[0043] (1) Select the soil of the contaminated site, prepare the pollutant microbial culture medium, select and cultivate the microbial strains that can effectively treat the organic pollutants in the soil, and obtain a mixed microbial broth after separation and purification;

[0044] (2) Add water to the contaminated soil to make a muddy soil mixed solution and adjust the pH value;

[0045] (3) Add the mixed microbial liquid, surfactant, potassium ferrate and hydrogen peroxide obtained in step (1) to the mixed solution of step (2), and let it stand after ultrasonic treatment.

[0046] Wherein, the solid-liquid ratio of the contaminated soil and water in step (2) is 1:4, and the pH range is 5-7.

[0047] In step (3), the surfactant is a mixture of saponin and activated carbon in a mass ratio of 1:1. The mass ratio of the mixed microorganism liquid, surfactant, potassium f...

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PUM

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Abstract

The invention provides a method for repairing polluted sites. The method for repairing the polluted sites comprises the steps that firstly, soil of the polluted sites is selected, a pollutant microorganism culture medium is prepared, microorganism strains capable of effectively treating organic pollutants in the soil can be selected and cultured, separating and purifying are carried out to obtainmixed microorganism bacterium liquid, then water is added to the polluted soil to prepare a slurry soil mixed solution, a pH value is adjusted, finally the mixed microorganism bacterium liquid, a surfactant, potassium ferrate and hydrogen peroxide are added into the mixed solution, and the mixture is placed silently after ultrasonic treatment. According to the method for repairing the polluted sites, combined with biological treatment and chemical oxidation methods, rapid and efficient remediation of soil contaminated by typical organochlorine pesticides such as DDT, HCH and the like can be realized, the surfactant is a mixture of saponin and activated carbon, sufficient contact between potassium ferrate and the organochlorine pesticides can be increased, and the repair cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of remediation of contaminated sites, and in particular relates to a method for remediating contaminated sites. Background technique [0002] Soil and / or groundwater pollution has been caused due to the production, operation, use, storage, and stacking of toxic and hazardous substances, or the treatment and disposal of toxic and hazardous wastes, or the migration of toxic and hazardous substances, or accidents, and has caused health and ecological risks or hazardous plots, known as contaminated sites. [0003] Urban industrial polluted land can be roughly divided into four categories. One is heavy metal pollution sites, mainly from iron and steel smelting enterprises, tailings and solid waste storage sites in the chemical industry. Representative pollutants include arsenic, lead, cadmium, chromium, etc.; the other is persistent organic pollutant pollution sites, For example, pesticides that have been produ...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/10
Inventor 成一知纪智慧
Owner 湖南新九方科技有限公司
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