Method for repairing polycyclic aromatic hydrocarbon contaminated sites and application

A polycyclic aromatic hydrocarbon and remediation method technology, which is applied in the field of soil remediation to achieve the effects of easy engineering application, easy operation and implementation, and realization of environmental treatment and remediation.

Inactive Publication Date: 2019-11-12
天津绿缘环保工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first object of the present invention is to provide a soil remediation method for polycyclic aromatic hydrocarbons polluted sites, to solve the problem of reducing benzo (a) anthracene, benzo (b) fluoranthene, benzo (a) pyrene, Pollution of indeno(1,2,3-cd)pyrene and dibenzo(a,h)anthracene five types of polycyclic aromatic hydrocarbons, the technical problem of making the concentration of corresponding substances in the final soil reach the remediation target value

Method used

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  • Method for repairing polycyclic aromatic hydrocarbon contaminated sites and application
  • Method for repairing polycyclic aromatic hydrocarbon contaminated sites and application
  • Method for repairing polycyclic aromatic hydrocarbon contaminated sites and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Get a group of soil samples, first add the liquid caustic soda of mass concentration 10%, stir evenly, add mass concentration 25% sodium persulfate according to the soil dosing ratio is 0.8% (mass fraction) again, guarantee the separation of sodium persulfate and liquid caustic soda The dosing ratio is 1:0.6, and then the soil moisture content is adjusted to 35%, and fully stirred evenly, and stacked and maintained for 8 days.

Embodiment 2

[0064] Get a group of soil samples, add the liquid caustic soda of mass concentration 10% earlier, stir evenly, add mass concentration 25% sodium persulfate according to the soil dosing ratio is 1% (mass fraction) again, guarantee the separation of sodium persulfate and liquid caustic soda The dosing ratio is 1:0.6, and then the soil moisture content is adjusted to 30%, and the soil is fully stirred evenly, and stored for 10 days.

Embodiment 3

[0066] Get a group of soil samples, add the liquid caustic soda of mass concentration 10% earlier, stir evenly, add mass concentration 25% sodium persulfate according to the soil dosing ratio is 2% (mass fraction) again, guarantee the separation of sodium persulfate and liquid caustic soda The dosing ratio is 1:0.6, and then the soil moisture content is adjusted to 30%, and fully stirred evenly, and stacked and maintained for 12 days.

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Abstract

The invention discloses a method for repairing polycyclic aromatic hydrocarbon contaminated sites and application, and relates to the technical field of soil repairing. The repairing effect can be effectively exerted, the pollution of polycyclic aromatic hydrocarbons, such as benzo(a)anthracene, benzo(b)fluoranthene and benzo(a)pyrene, indeno[1,2,3-cd]pyrene and dibenz(ah)anthracene in soil is reduced, the requirements of soil repairing are met, and the beneficial effects of environmental treatment and repairing are achieved. According to the method for repairing the polycyclic aromatic hydrocarbon contaminated sites, a repairing agent is applied to the contaminated soil, the soil moisture content is adjusted, and the soil is stacked after uniform stirring. The pollution risk of the site can be effectively removed or controlled, and it is guaranteed that the health of future receptors after the sites are developed is not harmful. The repairing agent used in the method is easy to obtain, is low in cost, is easy to operate and implement, is short in treatment period and remarkable in effect and is easy for engineering application, and economic benefit, environmental benefit and social benefit can be effectively realized.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a remediation method and application of polycyclic aromatic hydrocarbon-contaminated sites. Background technique [0002] Polycyclic aromatic hydrocarbons are a general term for a class of substances, most of which are colorless or light yellow crystals, some with dark colors, mostly insoluble in water, easily soluble in benzene aromatic solvents, slightly soluble in other organic solvents, pungent The alcohol-water partition coefficient is relatively high, and it has "three causes" (carcinogenic, teratogenic, mutagenic) effects and strong bioaccumulation. [0003] A site used to be a tire production plant. According to the environmental investigation of the site, there were benzo(a)anthracene, benzo(b)fluoranthene, benzo(a)pyrene, indeno(1,2,3-cd) Five kinds of polycyclic aromatic hydrocarbons including pyrene and dibenzo(a,h)anthracene exceeded the corresponding stand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 李静张炳慧轩一撒
Owner 天津绿缘环保工程股份有限公司
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