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Remediation of Chlordane Contaminated Soil

A technology of polluted soil and remediation method, which is applied in the field of chemical remediation of chlordane-contaminated soil, which can solve the problems of soil damage, seriousness, and long time, and achieve good remediation effect

Active Publication Date: 2016-08-24
JIANGSU GAIYA ENVIRONMENTAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved: the microorganisms and phytoremediation methods of chlordane-contaminated soil need too long time, and the chemical remediation will damage the soil more seriously. On the basis of conventional remediation, a new remediation method was adopted, using garlic saponin to remove chlordane in the soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Take a sample of chlordane-contaminated soil, place the chlordane-contaminated soil in a mixing tank, dilute the chlordane-contaminated soil with water until the total weight is 9 times the weight of the chlordane-contaminated soil; Add 35wt% hydrogen peroxide, the weight of hydrogen peroxide is 3.8wt% of the weight of chlordane-contaminated soil, and stir after adding; (3) Ultrasonic the chlordane-contaminated soil solution in the stirring tank during stirring, the ultrasonic power is 600w, and the ultrasonic time is 70min (4) Stop the ultrasound, then add garlic saponin to the mixing tank, the weight of garlic saponin is 0.9wt% of the weight of chlordane-contaminated soil, continue to stir for 30 minutes after adding, and separate the soil from the liquid after standing, the soil is chlorine after restoration. Dan pollutes the soil.

Embodiment 2

[0019] (1) Take a sample of chlordane-contaminated soil, place the chlordane-contaminated soil in a mixing tank, dilute the chlordane-contaminated soil with water until the total weight is 9 times the weight of the chlordane-contaminated soil; Add 35wt% hydrogen peroxide, the weight of hydrogen peroxide is 2wt% of the weight of the chlordane-contaminated soil, and stir after adding; (3) Ultrasonic the chlordane-contaminated soil solution in the stirring tank during stirring, the ultrasonic power is 700w, and the ultrasonic time is 40min; (4) Stop the ultrasound, and then add garlic saponin to the mixing tank. The weight of garlic saponin is 0.4wt% of the weight of chlordane-contaminated soil. After adding, continue stirring for 30 minutes. After standing still, separate the soil from the liquid. The soil is chlordane after restoration. pollute the soil.

Embodiment 3

[0021] (1) Take a sample of chlordane-contaminated soil, place the chlordane-contaminated soil in a mixing tank, dilute the chlordane-contaminated soil with water until the total weight is 9 times the weight of the chlordane-contaminated soil; Add 35wt% hydrogen peroxide, the weight of hydrogen peroxide is 2.3wt% of the weight of the chlordane-contaminated soil, and stir after adding; (3) Ultrasonic the chlordane-contaminated soil solution in the stirring tank during stirring, the ultrasonic power is 600w, and the ultrasonic time is 70min (4) Stop the ultrasound, then add garlic saponin to the mixing tank, the weight of garlic saponin is 0.8wt% of the weight of the chlordane-contaminated soil, continue to stir for 30 minutes after adding, and separate the soil from the liquid after standing, the soil is chlorine after restoration. Dan pollutes the soil.

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PUM

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Abstract

The invention belongs to the field of soil remediation, and discloses a method for remediating chlordane-contaminated soil. The method for remediating chlordane-contaminated soil includes the following steps: (1) Take a sample of chlordane-contaminated soil, and place the chlordane-contaminated soil under stirring In the tank, dilute the chlordane-contaminated soil with water until the total weight is 9 times the weight of the chlordane-contaminated soil; (2) add 35wt% hydrogen peroxide to the mixing tank, and stir after adding; (4) Stop ultrasonication, then add garlic saponin into the mixing tank, continue stirring for 30 minutes after adding, and separate the soil from the liquid after standing. The soil is chlordane-contaminated soil after remediation.

Description

technical field [0001] The invention belongs to the field of soil remediation, and relates to a method for remediating chlordane-contaminated soil, in particular to a method for chemically remediating chlordane-contaminated soil. Background technique [0002] Chlordane is used as a residual insecticide. Non-systemic contact and stomach toxicity insecticide, with long residual period, no plant damage under the insecticidal concentration; kill underground pests, such as mole crickets, cutworms, straw pests, etc. In some areas, there is a certain amount of chlordane residue in the soil, and chlordane exists in the soil for a long time, which will cause great damage to the soil. [0003] Among the remediation methods of chlordane-contaminated soil, surfactant remediation and chemical remediation are more commonly used. Chemical remediation uses oxidants to oxidize chlordane. greater pollution. In addition to chemical remediation, surfactants are used to remediate chlordane-co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/02B09C1/08
Inventor 程功弼詹晓倩
Owner JIANGSU GAIYA ENVIRONMENTAL SCI & TECH CO LTD