With the rapid development of industrial production, the problem of groundwater pollution in China has become increasingly prominent, and the impact of groundwater pollution on the environment and economic development is increasingly exposed. Therefore, strengthening the management of groundwater pollution and the development of corresponding technologies has become an urgent need. Objectively speaking, China has done a lot of basic work on groundwater pollution investigation and groundwater pollutant transfer and transformation model, but there are not many specific groundwater pollution control technologies, and foreign countries, especially European and American countries Since the 1970s, great progress has been made in the treatment of groundwater point source pollution, and gradually developed more systematic groundwater pollution control technologies. The groundwater pollution treatment technologies are summarized as follows: physical treatment method, hydrodynamic control method, extraction treatment method, and in-situ treatment method.
Groundwater Pollution Treatment Technology Method Research
1, physical law
The physical method is a method of physical treatment of contaminated groundwater. In summary, it can be divided into:
(1) Shielding method
The law establishes various physical barriers underground and traps contaminated water bodies to prevent the further spread of pollutants. The commonly used mortar curtain method uses pressure to pour the grout into the ground to form a curtain around the contaminated water, thereby trapping the contaminated water. Other physical barrier methods include mud water blocking walls, vibration pile water blocking walls, sheet pile water blocking walls, block replacement, membrane and synthetic material curtain trapping methods, etc. The principles are similar to the mortar curtain method. In general, the physical screening method can only be considered as a permanent sealing method when dealing with small-scale highly toxic and difficult-to-degrade pollutants. In most cases, it is only used in the initial stage of groundwater pollution control. A temporary control method.
(2) Passive collection method
The method is to dig a sufficiently deep channel downstream of the groundwater flow, to arrange a collection system in the ditch, to collect contaminants floating on the surface of the water, such as oil pollutants, or to collect all contaminated groundwater for treatment. Ways. Passive collection methods are generally effective when dealing with light pollutants (such as oils, etc.) and have been widely used in the United States to treat groundwater oil pollution.
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