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Method for controlling pollution to underground water and restoring soil in aeration zone in contaminated site

A technology for groundwater pollution and soil remediation, which is applied in the fields of preventing and controlling groundwater pollution and remediating vadose zone soil in polluted sites. good control effect

Inactive Publication Date: 2014-06-18
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] After more than ten years of global research and application, a contaminated soil remediation technology system including biological remediation, physical remediation, chemical remediation and their combined remediation technologies has been formed, but there are still many problems, such as high cost, engineering Difficult application, serious secondary pollution, etc.

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  • Method for controlling pollution to underground water and restoring soil in aeration zone in contaminated site
  • Method for controlling pollution to underground water and restoring soil in aeration zone in contaminated site

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Embodiment Construction

[0023] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings, taking the factory area as an example of a polluted site.

[0024] as attached figure 1 , 2 As shown, the present invention discloses a method for preventing and controlling groundwater pollution in polluted sites and remediating soil in the vadose zone, specifically:

[0025] Step 1, above the groundwater aquifer 15 in the lower part of the factory area 1, lay a sub-cohesive soil layer 3 and a cohesive soil layer 2 from bottom to top, thereby forming a capillary barrier with the effect of an aquifer;

[0026] Step 2. Dig a ditch above and below the factory area 1, namely the upstream ditch 4 and the downstream ditch 5, directly above the capillary barrier. The ditch is arranged in an arc shape, and the length of the ditch is greater than that of the factory area 1. Width, encircled and distributed at both ends of the factory area;

[0027]...

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Abstract

The invention discloses a method for controlling pollution to underground water and restoring soil in an aeration zone in a contaminated site. The method comprises the following steps: laying a capillary barrier above an aquifer for underground water at a lower part of the contaminated site; digging a trench both at an upper part and at the lower part of the contaminated site; processing the trenches; and laying a capillary barrier top cover on the surface layer of soil of the contaminated site and arranging draining pipelines in the surface layer of soil, wherein the draining pipelines are located above the capillary barrier top cover and connected with a rainwater purifying device, and a downstream trench is connected with a sewage treating device through a waste water pumping pipeline. The method provided in the invention can prevent pollutants from polluting underground water, realize leaching restoration of contaminated soil in the aeration zone and achieve the effect of utilization of rainwater. For reduction in cost, a geological environment with a natural water-proof layer beneath can be chosen during site selection of a factory. The method provided in the invention has the advantages of long duration of controlling, a good pollution controlling effect and relatively low cost.

Description

technical field [0001] The invention relates to groundwater pollution prevention and control technology, in particular to a method for preventing groundwater pollution in polluted sites and restoring vadose zone soil. Background technique [0002] With the acceleration of urbanization and the continuous development of industry, various pollutions caused by human factors are also increasing. Heavy metals, radioactive materials discharged from factories, and leachate from landfills constantly threaten the vadose zone soil and groundwater. The vadose zone is the area below the surface above the water table. Pollution of vadose zone soil and groundwater is referred to as "invisible pollution". At present, the pollution of soil and groundwater in my country is becoming more and more serious, and the soil and groundwater in the vadose zone are polluted to varying degrees, which poses a serious threat to the ecological environment, food safety and sustainable agricultural develop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00C02F1/00
Inventor 彭浩万军伟王志强张亚男和泽康张长城李仲夏王珺瑜沈丹萍范奇裴超袁超金子琪
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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