Remediation method for cadmium-polluted soil

By preventing vernalization treatment and appropriate field management of the accompanying sedum, the problems of vernalization and slow growth under low temperature conditions are solved, and the restoration efficiency and sustainability of cadmium-contaminated soil are improved.

CN119702669AActive Publication Date: 2025-03-28INST OF SOIL SCI CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202510228970.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-28
Publication Date
2025-03-28
Estimated Expiration
2045-02-28

AI Technical Summary

Technical Problem

After sequel to the mineral sequoia undergoes low temperature senification in winter and flowering and seedlings in summer, most of the branches wither and die and grow slowly, affecting its efficiency and sustainability in the restoration of cadmium-contaminated soil.

Method used

By performing seedling prevention and treatment of the branches of the ore-scattered field, it includes seedling cultivation in a temperature of 8~25℃ for 30~90 days, controlling the ambient temperature during the planting process, and carrying out appropriate field management, including irrigation, drainage, top dressing, insecticide and weeding.

Benefits of technology

It effectively avoids the low-temperature vernalization phenomenon of mineral sequoia, extends its vegetative growth cycle, improves the efficiency of absorption and repair of cadmium in cadmium-contaminated soil, and promotes its growth and heavy metal absorption capacity.

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Abstract

The invention discloses a cadmium-contaminated soil remediation method which comprises the following steps: performing seedling vernalization prevention treatment on sedum plumbizincicola branches to obtain sedum plumbizincicola seedlings; then the sedum plumbizincicola seedlings are transplanted into the cadmium-contaminated soil, in the planting and growing period of the sedum plumbizincicola seedlings, the environment temperature is controlled to range from 8 DEG C to 25 DEG C, and field management is conducted regularly; and when the branches of the sedum plumbizincicola do not grow obviously within 15-20 days, harvesting the sedum plumbizincicola, and removing the harvested object from the field. According to the method, through anti-vernalization treatment and planting of the sedum plumbizincicola, the phenomenon that most plants die after flowering due to low-temperature vernalization of the sedum plumbizincicola can be avoided, so that the vegetative growth cycle of the sedum plumbizincicola is effectively prolonged, and then the absorption and remediation efficiency of cadmium in the cadmium-contaminated soil is improved.
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