Anti-clogging zero-valent iron coupling response type slow-release persulfate two-stage permeable reactive barrier device and application thereof

Abstract

The invention discloses an anti-blocking zero-valent iron coupling response type slow-release persulfate two-stage permeable reactive barrier device and application thereof, and belongs to the technical field of groundwater pollution remediation. According to the technical scheme, two stages of reactive barriers are arranged at the downstream of a pollution plume; a first-stage reaction region anda second-stage reaction region are respectively formed in the two stages of reactive barriers; the first-stage reaction region is positioned at the upstream of the second-stage reaction region; the first-stage reaction region is filled with a mixed filler; the secondary reaction region is filled with a slow-release filler; perennial deep-rooted plants are planted at the top end of the first-stagereaction region; and iron-proof ectotrophic mycorrhiza is inoculated around the roots of the perennial deep-rooted plants. The two reaction regions cooperate with each other to degrade the chloro-hydrocarbon organic pollutants in groundwater, the groundwater is efficiently repaired, secondary pollution is prevented, and the device has the advantages of being more economical, efficient, ecologicaland environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of groundwater pollution restoration, and more specifically relates to an anti-clogging type zero-valent iron coupling response type slow-release persulfate two-stage permeable reaction wall device and its application. Background technique [0002] The rapid development of industry has led to serious pollution of chlorinated hydrocarbons in groundwater, affecting the safety of drinking water for surrounding residents and hindering the sustainable development of the economy. There is an urgent need to remediate chlorinated hydrocarbon-contaminated groundwater. At present, the remediation methods of chlorinated hydrocarbons in groundwater are mainly divided into two types: in-situ remediation and ex-situ remediation. There are reasons such as the rebound of pollutants in ectopic repair, which leads to incomplete repair, and is less and less valued in the repair field. The in-situ remediation technology is re...

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Problems solved by technology

[0003] However, the traditional permeable reaction wall also has the problems of wall clogging and reduction of removal efficiency. After a long period of use, the filler needs to be replaced. In addition, chlorinated hydrocarbons are a kind of relatively complex pollutants, and single reduction or oxidation cannot effectively remove pollution. substances with toxic by-products

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