Method for relieving stress of cadmium on duckweed by using ethyl caffeate

By adding an appropriate concentration of ethyl caffeate solution to cadmium-polluted water, the problem of cadmium stress inhibiting duckweed growth was solved, achieving physiological improvement of duckweed and bioremediation of cadmium-polluted water, with low cost and environmental protection characteristics.

CN122276986APending Publication Date: 2026-06-26JINGGANGSHAN UNIVERSITY
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Patent Information

Application Number
CN202610361778.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-24
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing technologies are insufficient to effectively alleviate the growth-inhibiting effect of cadmium stress on duckweed, and traditional methods are costly and may cause secondary pollution. There is a lack of environmentally friendly means to remediate cadmium pollution in water bodies.

Method used

Adding ethyl caffeate solution to cadmium-contaminated water and screening for suitable concentrations can alleviate cadmium stress in duckweed, reduce cadmium accumulation, promote duckweed growth, and remediate cadmium pollution in water bodies.

Benefits of technology

It significantly alleviates the growth inhibition of duckweed caused by cadmium stress, improves the survival and reproductive capacity of duckweed, enhances its ability to remediate cadmium, reduces the cadmium content in water, and is easy to operate and environmentally friendly.

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Abstract

The invention discloses a method for relieving stress of cadmium on duckweed by using ethyl caffeate. With industrial development, water body cadmium pollution seriously threatens ecology and human health, and traditional remediation methods have defects. Although the duckweed has water body restoration potential, cadmium stress inhibits growth of the duckweed. According to a concentration gradient experiment, it is determined that the highest Cd < 2 + > concentration capable of being borne by the duckweed is 10 micromoles, and the optimal concentration of the caffeic acid ethyl ester for relieving cadmium stress is 200 micromoles. According to the present invention, 200 [mu] mol of ethyl caffeate is added to every 100 ml of the cadmium pollution water body, such that the growth of the duckweed can be significantly promoted, the leaf number, the fresh weight and the root length can be increased, the antioxidant enzyme content can be increased, the MDA content can be reduced, the chlorophyll content can be increased, the photosynthesis can be enhanced, the cadmium accumulation in the duckweed can be significantly reduced, and the efficient water body cadmium pollution bioremediation can be achieved. The method is simple and convenient to operate, low in cost, environment-friendly and wide in application prospect in the field of water pollution treatment.
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