Leaching extraction treatment method and system for unconsolidated formation plot pollution

Abstract

The invention discloses a leaching and extraction treatment method and system for unconsolidated formation plot pollution; in an unconsolidated formation plot pollution area, the leaching water amount is increased manually, the flowability of pollutants in an aeration zone is improved, and the migration of the pollutants in the aeration zone to underground water is accelerated; the pollutants, which are difficult to treat, in the polluted aeration zone are leached into underground water; and in the polluted area and the downstream area of the underground water flow direction, the leached underground water containing the pollutants is pumped out through an underground water monitoring well. The leaching water amount is increased in a manual mode, migration of the aeration zone pollutants to the underground water is accelerated through the leaching effect, so that the polluted aeration zone pollutants which are difficult to treat are leached into the underground water, the pollutants are easy to treat, and the treatment cost is low; and meanwhile, repeated water pollution caused by the fact that pollutants in an aeration zone are dissolved and separated out to enter underground water again due to rising of the underground water level or rainfall is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a method and system for leaching and extracting pollution from loose stratum plots. Background technique [0002] At present, after leakage and leakage of pollutants in chemical industry parks in areas located in loose strata, they often infiltrate vertically through the vadose zone first. Continue to migrate into the groundwater, and the pollutants entering the groundwater are often treated by extraction, but the treatment effect is limited to the pollutants entering the groundwater. When the groundwater level rises or the surface water is leached, the pollutants in the vadose zone will dissolve and desorb and enter the groundwater again. , resulting in the repeated deterioration of groundwater quality in the affected area, prolonging the time for pollution disposal, and at the same time, for strata with poor water-rich properties, the purpose of artificially i...

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Problems solved by technology

[0002] At present, after leakage and leakage of pollutants in chemical industry parks in areas located in loose strata, they often infiltrate vertically through the vadose zone first. Continue to migrate into the groundwater, and the pollutants entering the groundwater are often treated by extraction, but the treatment effect is limited to the pollutants entering the groundwater. When the groundwater level rises or the surface water is leached, the pollutants in the vadose zone will dissolve and desorb and enter the groundwater again. , resulting in the repeated deterioration of groundwater quality in the affected area, prolonging the time for pollution disposal, and at the same time, for strata with poor water-rich properties, the purpose of artificially increasing the inflow of water is achieved through leaching, so as to achieve effective pumping and treatment; while intercepted by the vadose zone is Pollutants are often treated by foreign soil replacement, which is costly, and due to the evaporation and adsorption of pollutants in groundwater during the migration process, it often causes pollution in the downstream vadose zone that is relatively light but has a wider impact. This part of the pollution is extremely difficult to replace with foreign soil in a large area

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