Do you know that some species in nature can absorb some toxix waste?
I didn't know that, until yesterday and I did some research on the topic.
So phytoaccumulation is the process where the metals are taken up by the plant's roots and transmitted through the plant all the way to its branches. Plants who do that are called hyperaccumulators.
Duckweed
If the plants take s the metals out of the water in the ground, then this process is called rhizofiltration.
A wetland plant called duckweed is known for its ability to take up metals ( like copper, nikkel, zinc and even lead and cadmium). This plant is highly productive and recommended for metal removal by scientists which have tested its capacity in a pondweed (Natural Processes and Systems for Hazardous Waste Treatment, p 233 and 234).
Here are some pictures of that famous "duckweed"
https://www.lakerestoration.com/t-duckweed-control.aspx
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