Repairing device and method for pollution of underground water volatile organic matters
A technology for volatile organic compounds and groundwater, applied in water pollutants, chemical instruments and methods, separation methods, etc., can solve the problems of increasing the complexity of the repair process and increasing the repair cost, avoiding air pollution problems, saving economic costs, The effect of promoting gas phase transfer
Inactive Publication Date: 2017-01-04
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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[0004] Usually, the air aeration method needs to be used in combination with the gas phase extraction technology, and additional specific steam treatment units are required to further process the extracted gas, thereby increasing the complexity of the restoration process and increasing the restoration cost
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[0039] The xylene pollution concentration in the groundwater of a certain gas station is 5mg / L. According to the hydrogeological survey results of the site, 5 air injection wells are arranged downstream of the groundwater pollution plume. The distance between the air injection wells is 1.5m, and the well depth is 25m. The diameter of the trachea is 80mm, the length of the hole at the end of the gas injection pipe is 0.5m, and the hole diameter is 3mm. Activated carbon is selected as the adsorption material, and the filling thickness is 0.6m. The five air injection wells are powered by a solar panel at the same time. After two months of operation, the xylene content in the groundwater at the monitoring point downstream of the pollution plume has dropped to 0.3mg / L, and the xylene removal rate is 94%.
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Abstract
The invention provides a passive repairing device for pollution of underground water volatile organic matters. A solar panel is arranged on the ground and is used for converting solar energy into electric energy which is used as power of an air injection device and a power supply for heating a resistance wire; the air injection device is arranged on the ground, is connected with an air injection pipe and is used for injecting air into underground water; the air injection pipe is located at a central position of an underground water well; a sieve hole is formed in a pipe wall of the tail end of the air injection pipe; the resistance wire is wound at the outer part of the tail end of the air injection pipe located below an underground water level; one end of the resistance wire is connected with a solar panel output power supply and the other end of the resistance wire is connected with the air injection pipe; an adsorption material filling separation plate is arranged under the ground and in the underground water well; a through hole is formed in the adsorption material filling separation plate; an adsorption material is charged above the adsorption material filling separation plate. The invention further discloses a repairing method for the pollution of the underground water volatile organic matters by utilizing the repairing device. According to the passive repairing device and the repairing method, a whole repairing process is simple and the adsorption material is easy to replace; the operation is flexible and the cost is low.
Description
technical field [0001] The invention relates to the field of groundwater pollution restoration, in particular to a passive restoration device for volatile organic pollutants in groundwater. [0002] The invention also relates to a method for repairing volatile organic pollutants in groundwater by using the repair device. Background technique [0003] Air aeration (AS) is a cost-effective in situ remediation technique for the removal of volatile and semivolatile organic compounds in groundwater. This technology injects pressurized air into the underground remediation area to contact with pollutants through drilling, so that volatile organic pollutants enter the gas phase from the water phase and rise to the unsaturated area, and then treat them with gas phase extraction technology to achieve repair purpose. [0004] Usually, the air aeration method needs to be used in combination with the gas phase extraction technology, and additional specific steam treatment units are req...
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IPC IPC(8): C02F1/02B01D53/04C02F101/30
CPCC02F1/02B01D53/005B01D53/04C02F2101/30
Inventor 姜永海席北斗杨昱马志飞徐祥健彭星
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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