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Heavy metal dangerous waste in-situ storage and underground water pollution prevention method

A technology for groundwater pollution and heavy metals, which is applied in the fields of reduced water/sewage treatment, polluted groundwater/leachate treatment, solid waste removal, etc., can solve the problems of secondary development of heavy metals, surface water and groundwater pollution, etc., and achieve Good protection function, low cost of prevention and control, no secondary pollution effect

Active Publication Date: 2015-09-23
HUNAN AIRBLUER ENVIRONMENTAL PROTECTION TECH
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  • Summary
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Problems solved by technology

If the heavy metal hazardous waste is currently stabilized / immobilized, it will definitely bring great difficulties to the secondary development of valuable heavy metals
[0004] However, if these hazardous heavy metal wastes accumulated in the steep mountainous valleys are not treated, the long-term rainwater will pollute the surface water and groundwater in the lower reaches of the valley and the basin.

Method used

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  • Heavy metal dangerous waste in-situ storage and underground water pollution prevention method

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Embodiment 1

[0036] Such as figure 1 , figure 2 As shown, a method for in-situ storage of heavy metal hazardous waste and prevention and control of groundwater pollution according to the present invention firstly seals and covers the original heavy metal hazardous waste pile in the valley to form a closure and covering system 1; The vertical anti-seepage curtain 2 is used to initially block the polluted groundwater after the site is closed; finally, according to the direction of water flow, a permeable reaction wall 3 is set below the vertical anti-seepage curtain to repair groundwater pollution;

[0037] The site closure and covering system 1 is respectively set up from the original heavy metal hazardous waste pile A from bottom to top:

[0038] The clay barrier layer 1-1 is compacted clay with a thickness of 500mm. The main function is to prevent precipitation from penetrating into the original heavy metal hazardous waste pile and to control the migration and diffusion of gases.

[0...

Embodiment 2

[0055] Heavy metal hazardous waste left over from history in a certain city is piled up in a valley. The hazardous waste has not grown grass for many years. The average annual precipitation in the area is between 1200-1700mm, and the altitude is close to 1280m. Within a radius of 50km, there are steep mountainous areas with a large vertical drop between the top of the mountain and the bottom of the mountain. The maximum vertical distance is close to 200m, and the mountain road is rugged. According to the results of field investigation, the surface length, width and depth of the hazardous heavy metal waste left over from history are about 280×130×12m, and the content is preliminarily estimated to be at least one million tons.

[0056] According to the on-the-spot survey, the main source of hazardous waste is waste residues such as indigenous gold smelting, indigenous zinc smelting, and indigenous steelmaking since the 1960s. The detected lead concentration is 4.10mg / L, zinc conc...

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Abstract

The invention belongs to the field of heavy metal pollution prevention and discloses a heavy metal dangerous waste in-situ storage and underground water pollution prevention method. According to the method, firstly, closure cover is carried out on original heavy metal dangerous waste piles in a valley; then, a vertical seepage prevention curtain is arranged at a valley mouth in the downstream position of the valley for primarily blocking underground water polluted after closure; finally, a permeable reactive barrier is arranged below water flow of the vertical seepage prevention curtain for polluted underground water remediation. Compared with the prior art, the method provided by the invention has the advantages as follows: an in-situ storage technology is adopted for heavy metal dangerous waste left over by history and polluted underground water remediation is carried out, so that environment is protected, and resources are provided for conveniently refining and recycling heavy metals after the condition is mature in the future.

Description

technical field [0001] The invention belongs to the field of heavy metal pollution prevention and control, and in particular relates to methods for in-situ storage of heavy metal hazardous waste and groundwater pollution prevention and control. Background technique [0002] Due to historical reasons, a lot of heavy metal hazardous wastes are piled up in the valleys of steep mountainous areas. According to on-site investigations, the hazardous wastes mainly come from waste residues such as indigenous gold smelting, indigenous zinc smelting, and indigenous steel smelting since the 1960s. Due to the poor technological conditions at that time and the low effective mining rate, the waste slag had a high content of heavy metals. It was identified that the hazardous waste mainly contained arsenic, zinc, cadmium, lead, chromium, copper, silver, manganese, etc. According to the "Technical Standards for Hazardous Waste Landfill Pollution Control" (GB18598-2001) and "Technical Requirem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00C02F1/70C02F103/06
Inventor 游建军钟儒波李智胡志鑫唐传祥
Owner HUNAN AIRBLUER ENVIRONMENTAL PROTECTION TECH
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