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Method for treating organic refractory pollutants in soil

A refractory, pollutant technology, applied in the field of soil remediation, can solve the problems of strong toxicity, soil pollution, difficult natural degradation, etc., to achieve the effect of high redox potential, increase water solubility, and save dosage

Pending Publication Date: 2022-05-06
郑楷集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organochlorine pesticides are one of the commonly used pesticides, which are highly toxic and difficult to degrade naturally, causing great pollution to the soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The soil was pulverized and then sieved to obtain soil with a particle size not greater than 10 mm, which was then used for later use. Add 100g of polyoxyethylene lauryl ether to 10Kg of soil, and stir and mix for 4.5h.

[0040]The soil was heated by microwave to raise the temperature to 70° C., and then 2 L of 1.0 mol / L sodium persulfate aqueous solution was sprayed on the soil, and the treated soil was obtained after reacting for 1 day.

[0041] After testing, the removal rate of total pollutants in the soil reached 98.6%, the removal rate of phenanthrene reached 82.4%, and the removal rate of BHC reached 89.9%.

Embodiment 2

[0043] The soil was pulverized and then sieved to obtain soil with a particle size not greater than 10 mm, which was then used for later use. Add 80g of polyoxyethylene lauryl ether to 10Kg of soil, and stir and mix for 3 hours.

[0044] Microwave heating was carried out to the soil, and after the temperature was raised to 60° C., 3 L of 0.6 mol / L sodium persulfate aqueous solution was sprayed on the soil, and the treated soil was obtained after reacting for 1 day.

[0045] After testing, the removal rate of total pollutants in the soil reached 98%, the removal rate of phenanthrene reached 82.6%, and the removal rate of BHC reached 89.1%.

Embodiment 3

[0047] The soil was pulverized and then sieved to obtain soil with a particle size not greater than 10 mm, which was then used for later use. Add polysorbate-80 120g to 10Kg soil, stir and mix for 6h.

[0048] Microwave heating is carried out to soil, after making its temperature rise to 80 ℃, spray 1.5L of 1.5mol / L sodium persulfate aqueous solution to soil, react for 1 day and obtain treated soil.

[0049] After testing, the removal rate of total pollutants in the soil reached 98%, the removal rate of phenanthrene reached 80%, and the removal rate of BHC reached 88%.

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PUM

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Abstract

The invention discloses a method for treating organic refractory pollutants in soil, which comprises the following steps: step S10, crushing and sieving the soil, adding a surfactant, and uniformly mixing; s20, after the soil treated in the step S10 is heated to 60-80 DEG C, a sodium persulfate aqueous solution is sprayed to the soil, and a degradation reaction is conducted; wherein the heating mode is microwave heating or steam heating. The invention aims at providing a method capable of effectively degrading organic refractory pollutants in soil and repairing the soil.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for treating soil organic refractory pollutants. Background technique [0002] Soil is an important part of the ecological environment and one of the main resources for human survival. Organochlorine pesticides are one of the commonly used pesticides, which are highly toxic and difficult to degrade naturally, causing great pollution to the soil. Contents of the invention [0003] The main purpose of the present invention is to propose a method for treating organic refractory pollutants in soil, aiming at providing a method capable of effectively degrading organic refractory pollutants in soil and repairing soil. [0004] In order to achieve the above object, the present invention proposes a method for processing soil organic refractory pollutants, said method for processing soil organic refractory pollutants comprises the following steps: [0005] Step S10, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/06B09C1/08
CPCB09C1/06B09C1/08
Inventor 刘国栋陈康康李想坤牛风华
Owner 郑楷集团有限公司
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