Permeable reactive barrier device for underground water treatment

Abstract

A permeable reactive barrier device for underground water treatment comprises a water inlet tank, a permeable reactive tank and a water outlet tank which are sequentially arranged in the underground water flow direction, wherein mesh gratings are arranged among the water inlet tank, the permeable reactive tank and the water outlet tank; a water inlet is arranged on the other side wall, opposite to the permeable reactive tank, of the water inlet tank, and a sampling port is arranged at the top; a reactive medium layer is arranged in the permeable reactive tank and comprises a first limestone layer, a first activated carbon layer, a scrap iron layer, a porous ceramic filtering plate covered with a nano ceramic filtering membrane, a second activated carbon layer and a second limestone layer which are sequentially arranged in the underground water flow direction in an stacked manner; a sampling port is arranged at the top of the water outlet tank. A medium material used by the device has the characteristics of simplicity in preparation, rich raw material source, low cost and long service life, has good removal effects on the BOD, the COD, heavy metals and nitrates in underground water, and can improve the remediation capacity of a permeable reactive barrier to the polluted underground water.

Description

technical field [0001] The invention belongs to the technical field of groundwater pollution control and restoration and environmental protection, and in particular relates to a permeable reaction wall device for groundwater treatment. Background technique [0002] At present, the problem of groundwater pollution in the world is becoming more and more serious, and many countries have invested a lot of manpower and material resources to restore the polluted groundwater. [0003] Permeable Reactive Barrier (PRB) technology is a pollution treatment system that installs a specific reaction medium below the ground in order to achieve a certain environmental pollution control goal. It blocks the pollution zone and converts the pollutants into environmentally acceptable. acceptable form, but does not disrupt groundwater mobility. Specifically, PRB contains redox agents, chelating agents, complexing agents, adsorbents, precipitants or microorganisms that degrade various pollutant...

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Problems solved by technology

[0008] In order to solve the above problems, the purpose of the present invention is to provide a permeable reaction wall device for groundwater treatment, to overcome the defects of low comprehensive treatment efficiency in the prior art, and to provide a low-cost, high comprehensive treatment efficiency, which can be treated per unit volume Permeable reactive wall device with large sewage volume

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