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Composition for treating high-concentration organophosphorus pesticide-polluted soil and application thereof

A technology of organophosphorus pesticides and polluted soil, applied in the field of soil pollution remediation, can solve the problems of difficult soil remediation, and achieve high utilization rate, response time, and good durability

Active Publication Date: 2017-05-31
INST OF SOIL SCI CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem to be solved: the present invention aims at the problem that high-concentration organophosphorus pesticide soil is difficult to repair in the field, and provides a composition and application for treating high-concentration organophosphorus pesticide-contaminated soil

Method used

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  • Composition for treating high-concentration organophosphorus pesticide-polluted soil and application thereof
  • Composition for treating high-concentration organophosphorus pesticide-polluted soil and application thereof
  • Composition for treating high-concentration organophosphorus pesticide-polluted soil and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]Under the condition of high water-to-soil mass ratio (5:1), the experiments compared the removal effects of different concentrations of sodium persulfate and sodium hydroxide on the removal of high-concentration organophosphorus pesticides in the site soil.

[0029] A 250mL brown bottle with a polytetrafluoroethylene stopper is used as a reaction vessel, 10g of contaminated soil is weighed in the reaction bottle, 50mL of sodium hydroxide solution of different concentrations is added, and then sodium persulfate solids of different qualities are added to ensure that the reaction solution contains The initial concentrations of sodium hydroxide were 2.0, 5.0, and 7.0M, and the initial concentrations of sodium persulfate were 0.084, 0.21, and 0.42, respectively, and reacted for 3 days, placed in a constant temperature incubator (30°C), and shaken manually every day 2 times. In addition, high-concentration sodium hydroxide (7.0 M) and sodium persulfate (0.42) alone were set as...

Embodiment 2

[0037] In order to get closer to the conditions for remediation of contaminated soil on the actual site, we increased the water-to-soil ratio to 1:1, and investigated the removal effect of different concentrations of sodium persulfate and sodium hydroxide on the removal of high-concentration organophosphorus pesticides in this mud state.

[0038] A 250mL brown bottle with a polytetrafluoroethylene stopper is used as the reaction vessel, 50g of contaminated soil is weighed in the reaction bottle, 50mL of sodium hydroxide solution of different concentrations is added, and then sodium persulfate solids of different qualities are added to ensure that the reaction solution contains The initial concentrations of sodium hydroxide were 5.0, 7.0, and 10.0M, and the initial concentrations of sodium persulfate were 0.084, 0.21, and 0.42, respectively, and reacted for 7 days, placed in a constant temperature incubator (25°C), and shaken manually every day 2 times. In addition, high-concen...

Embodiment 3

[0046] In order to evaluate the applicability of PS / NaOH, the removal effect of the oxidation system on high concentration organophosphorus pesticides in soil was investigated.

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Abstract

The invention relates to a composition for treating high-concentration organophosphorus pesticide-polluted soil and application thereof. The application is characterized in that sodium persulfate is activated by alkaline to produce sulfate radical and hydroxyl with strong oxidizing property, and then the high-concentration organophosphorus pesticide (about 30000mg / kg) in site soil can be effectively degraded; under the action of single alkaline, the high-concentration organic pesticide is only hydrolyzed quickly, however after the sodium sulfate is added, the organophosphorus pesticide in the soil can be effectively mineralized; compared with the system of activating sodium sulfate by the alkaline, the other activating systems, such as activating of sodium persulfate by ferrous, and Fenton reagents, have poor treatment effect on the high-concentration organophosphorus pesticide. The method is suitable for treating the high-concentration organophosphorus pesticide-polluted soil, and has the advantages that the treatment efficiency is high, the operation is convenient, the environment-friendly effect is realized, the cost is low, and the like; a broad prospect is provided for restoration of the high-concentration organophosphorus pesticide-polluted soil at site.

Description

technical field [0001] The invention belongs to the technical field of soil pollution remediation, and in particular relates to a composition for rapidly treating soil polluted by high-concentration organophosphorus pesticides and an application thereof. Background technique [0002] With the implementation of the national policy of "retreating from two to three" and "retreating from cities and entering parks", a large number of chemical factories have been relocated out of the main urban area, resulting in a large number of heavily polluted sites in the city. For example, in Jiangsu Province, from 2000 to 2005, more than 400 chemical companies withdrew, shut down more than 1,000 small chemical factories, and replaced more than 300,000 mu of land in 2010. At the same time, chemical companies in Guangzhou, Shanghai, and Chongqing moved away from the main urban areas. There are hundreds of them. Although the enterprises have been relocated, the pollution caused by these chemi...

Claims

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Application Information

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IPC IPC(8): C09K17/02B09C1/08
CPCB09C1/08C09K17/02
Inventor 方国东朱长银周东美汪福旺
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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