Biochemical synergistic remediation method for heavy metal contaminated soil

Through the biochemical synergistic repair method, the synergy between plant extracts, plant source activators, microbial bacteria agents and super-enriched plants is used to solve the problems of low repair efficiency and secondary pollution of heavy metal contaminated soil in the existing technology, and achieve efficient and environmentally friendly heavy metal pollution repair effect.

CN119657624APending Publication Date: 2025-03-21AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI +1
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Patent Information

Application Number
CN202510025725.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-08
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

The existing technology has limitations when dealing with heavy metal-contaminated soil. The physical repair cost is high and the soil properties cannot be improved. Chemical repair is prone to secondary pollution, the biological repair efficiency is low and the cycle is long, and the lack of a synergistic mechanism makes it difficult to solve the problem of heavy metal pollution in a comprehensive and efficient manner.

Method used

Biochemical synergistic repair methods are adopted, including contamination assessment, plant extract preparation and use, application of plant-source activators, inoculation of microbial fungi agents, phytorepair and plant residue treatment and soil improvement. Through the synergistic effects of plant extracts, plant-source activators, microbial fungi agents and super-enriched plants, chelation, activation, degradation and fixation of heavy metals are achieved.

Benefits of technology

It significantly improves the repair efficiency, shortens the repair time, avoids secondary pollution, improves the physical and chemical properties of the soil, and achieves an efficient and environmentally friendly heavy metal pollution repair effect.

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Abstract

The invention relates to the technical field of environmental remediation, and discloses a biochemical synergistic remediation method for heavy metal contaminated soil, which comprises the following steps: S1, sampling the heavy metal contaminated soil, and analyzing the type, concentration and occurrence form of heavy metals of the heavy metal contaminated soil; s2, extracting active ingredients of polyphenols, organic acids or alkaloids from the plant materials; s3, applying a plant source activating agent to regulate the chemical form of the heavy metal in the soil and promote the activation of the heavy metal; s4, inoculating a functional microbial agent to enhance the heavy metal immobilization, transformation and phytoremediation capabilities; s5, planting hyperaccumulators, and cooperatively using the plant extract, the plant source activator and the microbial agent; s6, plant residue treatment and soil improvement. Through the synergistic effect of the plant extract, the plant source activator, the microbial agent and the hyperaccumulator, the plant source activator, the microbial agent and the hyperaccumulator can jointly act on the heavy metal contaminated soil from multiple ways, and chelating, activating, degrading and fixing of heavy metal are rapidly achieved.
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