Composite medium PRB restoration method for chlorohydrocarbon contaminated groundwater

Abstract

The invention relates to a composite medium PRB restoration method for chlorohydrocarbon contaminated groundwater. The method comprises the following steps: (1) investigating the depth, the flow rateand the flow of groundwater and the type, the concentration and the space distribution of contaminants in an area to be treated; (2) calculating the size of a groundwater contaminant plume, and defining a contaminated area according to the size of the contaminant plume; (3) excavating four parallel trenches at the downstream of the groundwater contaminant plume in a direction perpendicular to theflowing direction of the groundwater, wherein the four trenches are a gravel layer, a first reaction layer, a second reaction layer and an adsorption layer in the flowing direction of the groundwaterrespectively; (4) allowing the bottoms of the gravel layer, the first reaction layer, the second reaction layer and the adsorption layer to extend to a position below a water-containing layer of the treated area and a height from the water-containing layer to the top of each of the four layers to be more than the depth of the underwater; and (5) respectively arranging contaminant monitoring wellsat an upstream place, having a distance of 5 m to the gravel layer, of the gravel layer and a downstream place, having a distance of 2 m to the adsorption layer, of the adsorption layer.

Description

technical field

[0001] The invention relates to a composite medium PRB restoration method for ground water polluted by chlorinated hydrocarbons. Background technique

[0002] Water is a precious resource that human beings depend on for survival. As an important part of water resources, groundwater is often used as an ideal water supply source because of its wide distribution, good water quality, ease of use, and stable water quality changes. Groundwater is the water that exists in the rock voids below the ground, and is an important carrier of ecological environment factors, disaster factors, geological forces and information. my country is one of the 13 water-poor countries in the world. The per capita share of water resources in my country is only a quarter of the world's per capita share. The national groundwater resource reserves average 821.8 billion tons, accounting for about one-third of the country's total water resources. one.

[0003] As an important water resourc...

Examples

Embodiment 1

[0034] A composite media PRB restoration method for organically polluted groundwater, comprising the steps of:

[0035] (1) Investigate the geological structure, geotechnical properties, aquifer thickness, low water table, groundwater depth, groundwater velocity, groundwater flow rate, concentration of pollutants and spatial distribution of pollutants in the area to be treated.

[0036] (2) Calculate the size of the groundwater pollution plume, and delineate the pollution area according to the size of the pollution plume.

[0037] (3) Four parallel trenches are excavated downstream of the groundwater pollution plume and perpendicular to the direction of groundwater flow. The four trenches are divided into gravel layer, first reaction layer, second reaction layer and adsorption layer in sequence along the direction of groundwater flow. , and are filled with gravel filler, parts iron reaction filler, biological reaction filler and activated carbon filler respectively.

[0038] ...

Embodiment 2

[0047] A composite media PRB restoration method for organically polluted groundwater, comprising the steps of:

[0048] (1) Investigate the geological structure, geotechnical properties, aquifer thickness, low water table, groundwater depth, groundwater velocity, groundwater flow rate, concentration of pollutants and spatial distribution of pollutants in the area to be treated.

[0049] (2) Calculate the size of the groundwater pollution plume, and delineate the pollution area according to the size of the pollution plume.

[0050] (3) Four parallel trenches are excavated downstream of the groundwater pollution plume and perpendicular to the direction of groundwater flow. The four trenches are divided into gravel layer, first reaction layer, second reaction layer and adsorption layer in sequence along the direction of groundwater flow. , and are filled with gravel filler, parts iron reaction filler, biological reaction filler and activated carbon filler respectively.

[0051] ...

Embodiment 3

[0060] A composite media PRB restoration method for organically polluted groundwater, comprising the steps of:

[0061] (1) Investigate the geological structure, geotechnical properties, aquifer thickness, low water table, groundwater depth, groundwater velocity, groundwater flow rate, concentration of pollutants and spatial distribution of pollutants in the area to be treated.

[0062] (2) Calculate the size of the groundwater pollution plume, and delineate the pollution area according to the size of the pollution plume.

[0063] (3) Four parallel trenches are excavated downstream of the groundwater pollution plume and perpendicular to the direction of groundwater flow. The four trenches are divided into gravel layer, first reaction layer, second reaction layer and adsorption layer in sequence along the direction of groundwater flow. , and are filled with gravel filler, parts iron reaction filler, biological reaction filler and activated carbon filler respectively.

[0064] ...

technical field

[0001] The invention relates to a composite medium PRB restoration method for ground water polluted by chlorinated hydrocarbons. Background technique

[0002] Water is a precious resource that human beings depend on for survival. As an important part of water resources, groundwater is often used as an ideal water supply source because of its wide distribution, good water quality, ease of use, and stable water quality changes. Groundwater is the water that exists in the rock voids below the ground, and is an important carrier of ecological environment factors, disaster factors, geological forces and information. my country is one of the 13 water-poor countries in the world. The per capita share of water resources in my country is only a quarter of the world's per capita share. The national groundwater resource reserves average 821.8 billion tons, accounting for about one-third of the country's total water resources. one.

[0003] As an important water resourc...

Examples

Embodiment 1

[0034] A composite media PRB restoration method for organically polluted groundwater, comprising the steps of:

[0035] (1) Investigate the geological structure, geotechnical properties, aquifer thickness, low water table, groundwater depth, groundwater velocity, groundwater flow rate, concentration of pollutants and spatial distribution of pollutants in the area to be treated.

[0036] (2) Calculate the size of the groundwater pollution plume, and delineate the pollution area according to the size of the pollution plume.

[0037] (3) Four parallel trenches are excavated downstream of the groundwater pollution plume and perpendicular to the direction of groundwater flow. The four trenches are divided into gravel layer, first reaction layer, second reaction layer and adsorption layer in sequence along the direction of groundwater flow. , and are filled with gravel filler, parts iron reaction filler, biological reaction filler and activated carbon filler respectively.

[0038] ...

Embodiment 2

[0047] A composite media PRB restoration method for organically polluted groundwater, comprising the steps of:

[0048] (1) Investigate the geological structure, geotechnical properties, aquifer thickness, low water table, groundwater depth, groundwater velocity, groundwater flow rate, concentration of pollutants and spatial distribution of pollutants in the area to be treated.

[0049] (2) Calculate the size of the groundwater pollution plume, and delineate the pollution area according to the size of the pollution plume.

[0050] (3) Four parallel trenches are excavated downstream of the groundwater pollution plume and perpendicular to the direction of groundwater flow. The four trenches are divided into gravel layer, first reaction layer, second reaction layer and adsorption layer in sequence along the direction of groundwater flow. , and are filled with gravel filler, parts iron reaction filler, biological reaction filler and activated carbon filler respectively.

[0051] ...

Embodiment 3

[0060] A composite media PRB restoration method for organically polluted groundwater, comprising the steps of:

[0061] (1) Investigate the geological structure, geotechnical properties, aquifer thickness, low water table, groundwater depth, groundwater velocity, groundwater flow rate, concentration of pollutants and spatial distribution of pollutants in the area to be treated.

[0062] (2) Calculate the size of the groundwater pollution plume, and delineate the pollution area according to the size of the pollution plume.

[0063] (3) Four parallel trenches are excavated downstream of the groundwater pollution plume and perpendicular to the direction of groundwater flow. The four trenches are divided into gravel layer, first reaction layer, second reaction layer and adsorption layer in sequence along the direction of groundwater flow. , and are filled with gravel filler, parts iron reaction filler, biological reaction filler and activated carbon filler respectively.

[0064] ...

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