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Method for removing chlordane and mirex in soil by utilizing ultrasonic wave/Fe

A technology of mirex and ultrasonic, applied in the field of removing chlordane and mirex in soil by ultrasonic/Fe, can solve the problems of low repair rate and high repair cost of chlordane and mirex, and achieve low cost and simple operation Effect

Inactive Publication Date: 2011-01-12
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. The technical problem to be solved by the invention: Aiming at the many deficiencies of the current soil remediation technology, the present invention provides a method for removing chlordane and mirex in the soil by using ultrasonic waves / Fe, which is used to solve the problems of chlordane and mirex in the soil remediation method. The problem of low repair rate and high repair cost of Antling

Method used

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  • Method for removing chlordane and mirex in soil by utilizing ultrasonic wave/Fe

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Example 1: Ultrasonic degradation experiments were used to study the amount of iron required for ultrasonic / Fe degradation of chlordane and mirex in soil.

[0016] Take highly polluted soil samples (chlordane concentration 1600ppm, mirex concentration 960ppm) 50g soil respectively and put into 6 250ml polyethylene bottles, add 0.0025g, 0.005g, 0.01g, 0.05g, 0.1g, 0.5g iron, Add 100ml of water, centrifuge the water and soil after ultrasonication at 450w for 1h, and measure the content of chlordane and mirex in the soil; respectively take low-pollution soil samples (chlordane concentration 100ppm, mirex concentration 100ppm) 50g soil into 6 In a 250ml polyethylene bottle, add 0.005g, 0.01g, 0.05g, 0.1g, 0.5g, 1.0g iron, add 100ml water, centrifuge water and soil after ultrasonication at 450w for 1h, and measure chlordane and chlordane in the soil Ant spirit content.

[0017] The results showed that the degradation rate of chlordane and mirex increased firstly and then de...

Embodiment 2

[0018] Example 2: Ultrasonic degradation experiments were used to study the ultrasonic power required for ultrasonic / Fe degradation of chlordane and mirex in soil.

[0019]Take highly polluted soil samples (chlordane concentration 1600ppm, mirex concentration 960ppm) 50g soil respectively and put into three 250ml polyethylene bottles, add a certain amount of iron (the mass ratio of soil to iron is 500:1), add 100ml Water, ultrasonically at 200w, 450w, and 600w for 1 hour, then centrifuge to separate water and soil, and measure the content of chlordane and mirex in the soil; respectively take 50g of low-pollution soil samples (chlordane concentration 100ppm, mirex concentration 100ppm) Put the soil into three 250ml polyethylene bottles, add a certain amount of iron (the mass ratio of soil to iron is 100:1), add 100ml of water, and then centrifuge the water and soil after ultrasonication at 200w, 450w, and 600w for 1 hour. Determination of chlordane and mirex content in soil.

...

Embodiment 3

[0021] Example 3: Ultrasonic degradation experiments were used to study the ultrasonic degradation time required for ultrasonic / Fe degradation of chlordane and mirex in soil.

[0022] Take highly polluted soil samples (chlordane concentration 1600ppm, mirex concentration 960ppm) 50g soil respectively and put into three 250ml polyethylene bottles, add a certain amount of iron (the mass ratio of soil to iron is 500:1), add 100ml Water, under the condition of 450w, sonicate for 0.5h, 1.0h, 1.5h respectively, then centrifuge the water and soil, and measure the content of chlordane and mirex in the soil. Take low-contamination soil samples (chlordane concentration 100ppm, mirex concentration 100ppm) 50g soil respectively and put into three 250ml polyethylene bottles, add a certain amount of iron (the mass ratio of soil to iron is 100:1), add 100ml Under the condition of 450w water, the water and soil were ultrasonically separated for 0.5h, 1.0h, and 1.5h respectively, and the conte...

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Abstract

The invention discloses a method for removing chlordane and mirex in soil by utilizing ultrasonic wave / Fe, belonging to the field of controlling pesticide residues in soil and mainly aims at removing the chlordane and the mirex in the soil by using zero-valent iron as a reducing agent. The method comprises the following steps of: determining the contents of the chlordane and the mirex in the polluted soil; determining the consumption of iron needed for remediating the polluted soil in different concentrations and controlling degradation time and ultrasonic mechanical power; determining power needed for remediating the polluted soil in different concentrations and controlling ultrasonic time and iron consumption; and determining the time for remediating the polluted soil in different concentrations and controlling the ultrasonic power and the iron consumption by adopting an ultrasonic degradation optimization experiment. The invention has the advantages of: (1) effectively removing the chlordane and the mirex in the soil, reaching the chlordane removal rate up to 96 percent and the mirex removal rate up to 97 percent; and (2) effectively degrading the chlordane and the mirex in the soil and avoiding or lessening secondary pollution and also having simple operation and lower cost.

Description

technical field [0001] The invention relates to a method for removing chlordane and mirex in soil, specifically a method for removing chlordane and mirex in soil by using ultrasonic wave / Fe. Background technique [0002] The soil environment refers to the ecological environment of the soil formed by the long-term action of many factors such as physical, chemical, and biological erosion and weathering of rocks, as well as landforms and climates. It is a loose surface environment that is fertile on the earth's land surface and can grow plants and microorganisms. It provides the nutrients and water necessary for plant life, and is an important place for the exchange of materials and energy in the ecosystem. In the process of urbanization, due to the inconsistency between the development of environmental protection predictability, environmental protection measures, pollutant treatment technology, people's environmental awareness and the speed of economic development, my country'...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 郭红岩任丽静季荣吴海锁王志良孙和喜
Owner NANJING UNIV
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