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Chemical remediation method for soil contaminated by endosulfan

A chemical remediation technology with endosulfan, applied in the field of chemical remediation of contaminated soil, to achieve the effect of easy control of conditions, simple operation and good remediation effect

Inactive Publication Date: 2012-07-25
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a new chemical repair method for endosulfan-contaminated soil aiming at the deficiencies in the remediation technology of existing endosulfan-contaminated soil

Method used

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  • Chemical remediation method for soil contaminated by endosulfan

Examples

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Effect test

Embodiment 1

[0018] Example 1: Soil Remediation

[0019] Collect polluted soil from an abandoned site of a production company in Huaian, Jiangsu. The sampling depth is 10cm. Mix the collected endosulfan-contaminated soil, dry it in the dark, crush it, divide it into two parts, and grind one part through a 60-mesh aperture. screen.

[0020] The determination of the content of endosulfan in the soil adopts gas chromatography-electron capture detector, and the determination result of endosulfan is 8.24mg / kg.

[0021] The processing of this application: take 20.00kg soil sample (through 20 mesh sieve) and place in 50L plastic bucket, add quicklime hydrolyzing agent (quicklime absorbs water and becomes calcium hydroxide, hydroxide radical and endosulfan take place hydrolysis reaction), stir evenly , so that the content of quicklime is 2% of the soil weight; then add appropriate amount of tap water to adjust the soil water content to 25%, cover the soil with an opaque black plastic film and pla...

Embodiment 2

[0035] Except that the amount of adding quicklime is 3% of soil weight, all the other steps are processed with the present application of embodiment 1, measure the endosulfan content in the soil polluted by endosulfan with GC-ECD, its residual amount is 0.008, the removal of endosulfan The rate is 99.9%.

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Abstract

The invention relates to a chemical remediation method for soil contaminated by endosulfan, which aims to realize chemical remediation of contaminated soil on contaminated sites for endosulfan production, utilizes quick lime to treat soil contaminated by endosulfan, is simple in operation and requires conditions easy to control. The chemical remediation method includes adding quick lime into soil contaminated by endosulfan, regulating water content of the soil, stacking the soil at the normal temperature in dark for three days and then degrading endosulfan to be low-toxicity or non-toxic substance. The chemical remediation method has the advantages of fine remediation effect, operational simplicity, low cost, high efficiency and the like.

Description

technical field [0001] The invention relates to the treatment technology of the soil polluted by endosulfan, and mainly aims at the chemical restoration method of the polluted soil in the polluted site where the endosulfan is produced. Background technique [0002] Endosulfan is also known as Shuodan, Saidan, etc. in my country, chemical name: 1,2,3,4,7,7-hexachlorobicyclo[2,2,1]hept-2-ene-5,6-bis Hydroxymethylsulfite. Endosulfan is a broad-spectrum organochlorine insecticide and acaricide. The active group is cyclic sulfate. It has contact killing, stomach poisoning and fumigation effects, and has good control effect on chewing insects and mites. [0003] Industrial endosulfan consists of a mixture of two isomers, α-endosulfan and β-endosulfan, with a content ratio of 70:30. The soil polluted by endosulfan is mainly the waste discharge site and waste dump site during the production of endosulfan. Due to the impact of endosulfan on human health and the environment, the EU ...

Claims

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Application Information

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IPC IPC(8): B09C1/08
Inventor 刘济宁石利利周林军陈国松沈树宝蔡道基
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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