An Oxidative Active Zone Remediation System for Organic Pollution in Groundwater

By constructing an oxidation-active reaction zone in groundwater and utilizing a dual-well structure of injection wells and monitoring wells, the remediation agent is injected into the inner well, and the slow-release material is filled into the outer well. This solves the problems of long remediation cycles and high costs in existing technologies, and achieves rapid and effective remediation of organic pollution in groundwater.

CN224450418UActive Publication Date: 2026-07-03TIANJIN ECOLOGY CITY ENVIRONMENTAL PROTECTION
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
TIANJIN ECOLOGY CITY ENVIRONMENTAL PROTECTION
Filing Date
2025-07-17
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing groundwater remediation technologies suffer from long remediation cycles, high costs, and limited effectiveness, making them ineffective in addressing sudden environmental pollution and complex pollution scenarios.

Method used

An oxidation-active zone remediation system is designed, which adopts a dual-well structure consisting of multiple injection wells and monitoring wells. The inner well is injected with remediation agents, and the outer well is filled with slow-release remediation materials to form an oxidation-active reaction zone. Through reasonable layout and efficient remediation agents and slow-release materials, the spread of pollution can be quickly blocked.

Benefits of technology

It achieves rapid and effective groundwater remediation. The remediation agents and slow-release materials are simple to prepare, highly adaptable, and suitable for various organic pollutants, without secondary pollution. The slow-release remediation materials are easy to replace and have even greater adaptability.

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Abstract

This invention provides an oxidative active zone remediation system for groundwater organic pollution, comprising multiple injection wells and monitoring wells located downstream of the groundwater pollution plume. The injection wells are arranged in rows at equal intervals perpendicular to the groundwater flow direction, with adjacent wells in the same row spaced equidistantly apart, and wells in adjacent rows staggered. Monitoring wells are located upstream and downstream of the oxidative active zone formed by the injection wells. Each injection well has a dual-well structure, including an inner well and an outer well. Both the inner and outer wells are slotted pipes. A remediation agent is injected into the inner well, and a slow-release remediation material is filled between the inner and outer wells. The outer well has a wall constructed from bottom to top, filled with quartz sand filter media, sodium-based bentonite particles, and impermeable cement slurry. Through its rational structural design and the application of remediation agents and slow-release remediation materials, this remediation system can rapidly establish an oxidative active reaction zone, effectively blocking the spread of groundwater pollution and achieving rapid and effective groundwater remediation.
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