Restoring device and restoring method for treating fluorine pollution of groundwater

A groundwater and repair material technology, applied in the direction of infiltration/dialysis water/sewage treatment, etc., can solve the problem of no obvious repair effect, achieve the effects of small footprint, energy saving, and small destructiveness

Inactive Publication Date: 2013-02-13
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology

If the permeability coefficient of the soil layer in the polluted area is small and the groundwater flow rate is small, the traditional PRB has no obvious repair effect

Method used

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  • Restoring device and restoring method for treating fluorine pollution of groundwater
  • Restoring device and restoring method for treating fluorine pollution of groundwater
  • Restoring device and restoring method for treating fluorine pollution of groundwater

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Embodiment 1

[0046] Conditions in this area: the buried depth of groundwater is 3m, the vadose zone and aquifer are mainly muddy clay plus fine sand, and the average permeability coefficient of the soil layer is 9×10 -7 cm / s, groundwater quality in the polluted area: pH is 7.2; ORP is 115mV; average concentration of fluoride in groundwater is 10.6mg / L. Restoration system: Inner diameter of water injection wells and pumping wells is 10cm; sleeve-type PRB thickness is 20cm; pump speed is 500ml / min, running for 3 hours a day.

[0047] First, use investigation, simulation and other means to understand the situation of the polluted area. Clarify the scope of pollution plumes, and deploy joint restoration devices according to geological conditions and pollution conditions. 60 days after the operation was stable, the water quality was monitored, and the results showed that there was no obvious subsidence on the ground, and the treatment effect on the fluorine-polluted groundwater was good. In t...

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Abstract

A restoring device for treating fluorine pollution of groundwater mainly comprises a water pumping well and at least one water injection well, wherein a water suction pump is installed in a well pipe of the water pumping well, and a booster pump is installed in a well pipe of the water injection well. The part of the well pipe of the water pumping well and the part of the well pipe of the water injection well, which are located below the water level, are provided with well sieves. A water conveying pipe is connected between the water suction pump and the booster pump, the well pipe of the water pumping well and the well pipe of the water injection well are respectively arranged on respective protecting walls with holes, a fluorine-removed restoring material is filled in the well sieves of the well pipes and the protecting walls to form a permeable reactive barrier, and materials having supporting effects are filled in parts above the well sieves of the well pipes and the protecting walls. The invention further provides a restoring method for treating fluorine pollution of the groundwater. Compared with traditional in-situ ex-situ restoring technologies, the restoring device and the restoring method have high applicability and repair rate for the polluted groundwater.

Description

technical field [0001] The invention belongs to the technical field of groundwater restoration, and in particular relates to a sleeve type permeable reactive wall (PRB) restoration device combined with pumping and injection for treating groundwater fluorine pollution. [0002] The invention also relates to a method for repairing groundwater fluorine pollution by using the repairing device. Background technique [0003] Groundwater is one of the guarantees for the survival of human beings around the world. With the increasing prosperity of the society, the demand for groundwater in my country's industrial and agricultural development is increasing day by day. However, the solid and liquid waste generated by the development of industry and agriculture pollutes groundwater through various channels. Fluorine is an essential trace element in the human body. When the fluorine content in water is between 1.0-1.5mg / L, long-term drinking has a slight adverse effect on the human bod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44
Inventor 李翔白顺果席北斗姜永海袁志业安达杨昱张进保
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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