Method for carbon reduction repair of chromium-contaminated soil with assistance of microwaves

A chromium-contaminated soil, microwave-assisted technology, applied in the restoration of polluted soil and other directions, can solve the problems of reducing mobility and bioavailability, and achieve the effects of reducing toxicity, rapid and efficient heating, and uniform heating

Inactive Publication Date: 2016-09-28
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The change of form is through immobilization and other means, such as stabilization through immob...

Method used

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  • Method for carbon reduction repair of chromium-contaminated soil with assistance of microwaves
  • Method for carbon reduction repair of chromium-contaminated soil with assistance of microwaves
  • Method for carbon reduction repair of chromium-contaminated soil with assistance of microwaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Sequentially weigh 50g soil samples into a series of 100ml corundum crucibles to absorb 10mg / L, 20mg / L, 40mg / L, 60mg / L, 80mg / L, 100mg / LMn 2+ Ionic activated carbon powder is used as a microwave heating absorbing material, the dosage ratio is 7%, the microwave power is set to 700W, and the irradiation time is 10min.

[0020]

Embodiment 2

[0022] Sequentially weigh 50g soil samples into a series of 100ml corundum crucibles, add 1%, 2.5%, 5%, 7%, 9%, 10% Mn 2+ Saturated toner mixed well. Microwave power 700W, radiation time 10min.

[0023]

Embodiment 3

[0025] Sequentially weigh 50g soil samples into a series of 100ml corundum crucibles, add 7% Mn 2+ Saturated toner mixed well. Set the microwave power to 700W, the irradiation time to 10min, and adjust the moisture content of the mixture to 10%, 20%, 40%, 60%, and 80%, respectively.

[0026]

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PUM

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Abstract

The invention belongs to the field of repairing soil heavy metal pollution, and discloses a preparation method of a reducing agent for removing chromium-contaminated soil, and a method for repairing chromium-contaminated soil by using the reducing agent under microwave-assisted conditions. The reducing agent includes: activated carbon powder, 40mg/L of Mn 2+ liquid. The steps of the method for remediating polluted soil include: mixing the sieved chromium-contaminated soil with the reducing agent described in the present invention, and treating it with microwave radiation for a period of time to complete the remediation of the chromium-contaminated soil. The invention can greatly reduce the restoration time of the polluted soil, realize the removal of the heavy metal chromium in the polluted soil within a few minutes, and can meet the requirement of rapid restoration of the heavy metal polluted site.

Description

technical field [0001] The invention belongs to the field of restoration of soil heavy metal pollution, and discloses a preparation method of a reducing agent for removing chromium in polluted soil, and a method for repairing chromium-contaminated soil by using the reducing agent under microwave-assisted conditions. Background technique [0002] Since the reform and opening up, with the rapid development of the chromium industry, soil chromium pollution incidents have gradually increased nationwide. Not only has the damage to agriculture gradually increased, but also due to the expansion of the food chain, the toxicity to animals, plants and humans has also continued to increase. . Due to historical reasons, most of the solid waste discharged from the production process of chromium salt factories in my country has not taken any anti-seepage measures, and is mainly treated by simple stockpiling. In areas with frequent rainfall, this part of hexavalent chromium that is easily ...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/06
CPCB09C1/08B09C1/06
Inventor 高云涛郭秋爽熊华斌
Owner YUNNAN MINZU UNIV
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