Phytoremediation of cadmium-contaminated water by Lemna minor

Document Type : Research articles.

Authors

1 Agricultural Engineering Department, Faculty of Agriculture, Fayoum University

2 Botany Department, Faculty of Agriculture, Fayoum University

3 Department of Agricultural Engineering, Faculty of Agriculture, Cairo University

Abstract

The aptitude of Lemna minor to remediate cadmium (Cd)-contaminated water has been fairly well established. In light of L. minor's critical function in environmental cleanup, a controlled experiment was conducted to assess its Cd bioaccumulation potential. Lemna minor tolerated Cd up to 1.0 ppm for 21 days before exhibiting indications of Cd poisoning, and the fresh and dry weights of L. minor declined dramatically. Whereas it dropped considerably with intensifying Cd percentages, the electrical conductivity (EC) of the L. minor growth medium reduced considerably (15.7-22.4%) with rising plant-loaded density (PLD). The pH findings of the L. minor growth medium and the EC were in conflict. When more Cd was applied, the percentage in the L. minor growth culture rose greatly (3.9-29.7%); however, as PLD increased, the percentage of Cd in the L. minor fronds declined substantially (48.7-68.4%). The bio-concentration factor for Cd increased (48-68%) with increasing PLD and the Cd concentration tested (36.0-80.0%). Nevertheless, L. minor demonstrated promising phytoremediation capacity for the heavy metal Cd studied, with high Cd separation efficiency. Because L. minor is an invasive organism that is widely distributed in Egyptian aquatic ecosystems and grows quickly, it is a viable remediation technique for polluted soils and water in progressively degraded environments. Therefore, this study was conducted to test the potential of duckweed (Lemna minor) as a potential remedy to reduce the hazards of lead contamination associated with agricultural operations. It is also easy to handle.

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