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Method for remediating organic-contaminated place soil by using microwave in collaboration with sodium percarbonate

A technology for sodium percarbonate and organic pollution, applied in the field of soil remediation of organically polluted sites, can solve the problems of single action range of in-situ remediation oxidants, high activation energy consumption, insufficient stability, etc., to shorten the treatment time, improve the degradation rate, The effect of easy industrial production

Active Publication Date: 2016-04-06
广州沃索环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a process for rapidly degrading soil organic pollutants. The process technology is efficient, easy to implement, has no secondary pollution, and has a good removal effect. Activation and high activation energy consumption, secondary pollution during use, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Weigh 1.0g sodium percarbonate, add 10ml distilled water, dissolve and mix well;

[0021] (2) Add sodium percarbonate solution to 10 g of phthalate-contaminated soil with a concentration of 10 mg / kg, and mix thoroughly;

[0022] (3) Put the mixture into a frequency conversion microwave reactor, set the temperature at 80°C, and keep stirring for 20 minutes;

[0023] (4) Take out the mixture and measure the concentration of phthalates in the soil. The concentration of phthalates drops from 10mg / kg to 5.65mg / kg, and the removal rate reaches more than 43.5%.

Embodiment 2

[0025] (1) Weigh 1.0g sodium percarbonate, add 10ml distilled water, dissolve and mix well;

[0026] (2) Add sodium percarbonate solution to 20 g of phthalate-contaminated soil with a concentration of 15 mg / kg, and mix thoroughly;

[0027] (3) Put the mixture into a frequency conversion microwave reactor, set the temperature at 70°C, and keep stirring for 30 minutes;

[0028] (4) Take out the mixture and measure the concentration of phthalates in the soil. The concentration of phthalates dropped from 15mg / kg to 8.28mg / kg, and the removal rate reached more than 44.8%.

Embodiment 3

[0030] (1) Weigh 0.5g sodium percarbonate, add 10ml distilled water, dissolve and mix well;

[0031] (2) Add sodium percarbonate solution to 10 g of phthalate-contaminated soil with a concentration of 10 mg / kg, and mix thoroughly;

[0032] (3) Put the mixture into a frequency conversion microwave reactor, set the temperature at 60°C, and keep stirring for 30 minutes;

[0033] (4) Take out the mixture and measure the concentration of phthalates in the soil. The concentration of phthalates dropped from 10mg / kg to 5.96mg / kg, and the removal rate reached more than 40.4%.

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Abstract

The invention relates to a method for remediating organic-contaminated place soil by using microwave in collaboration with sodium percarbonat and belongs to the technical field of organic-contaminated place soil remediation; the method specifically comprises: preparing a sodium percarbonat solution having a mass concentration of 5-10%, adding the sodium percarbonat solution to 10-15mg / kg phthalate contaminated soil in a mass ratio of 1: (1-2), mixing thoroughly and stirring uniformly, putting the mixture in a variable-frequency microwave reactor, setting a temperature range from 60 to 80 DEG C, carrying out a continuous stirring reaction for 20-30 minutes, and finally taking out the mixture and measuring a phthalate concentration in the soil to find out that a phthalate removal rate is above 40%; the technical method for remediating soil of the present invention is efficient, easy to implement, free from secondary pollution, good in removal effect, and suitable for organic-contaminated soil polluted by phthalates, polycyclic aromatic hydrocarbons, polychlorinated biphenyls and the like.

Description

technical field [0001] The invention relates to a method for remediating soil in organically polluted sites, in particular to a method for degrading organic pollutants in site soil with microwaves and sodium percarbonate, and belongs to the technical field of soil remediation in organically polluted sites. Background technique [0002] With the acceleration of urbanization and industrial transfer, a large number of organic pollution site soils have appeared due to the closure and relocation of petrochemical plants, electroplating plants, coking plants, steel plants, and power plants. According to incomplete statistics, from 2001 to 2012, more than 100,000 high-pollution and high-energy-consuming enterprises that were originally located in cities across the country gradually moved out of central urban areas. Surveys of relocation sites in cities such as Shenzhen, Guangzhou, Beijing, and Chongqing show that , about 1 / 5 or more of the relocation sites are seriously polluted. T...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/06
CPCB09C1/065B09C1/08
Inventor 林亲铁彭远锋陈志良郑友平尹光彩刘千钧
Owner 广州沃索环境科技有限公司
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