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Phytoremediation Variables, Low Metal Concentration

When a site is contaminated with a low concentration of metals, can phytoremediation be implemented, and if so, how?

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It depends greatly on "WHAT" metal is present, conditions of the soil (substrate) and climate.

For instance lead (Pb) can be taken up with sunflowers using EDTA as an adjunct.
see: ...

Solution Summary

Short answer regarding potential and variables regarding the process of phytoremediation. Considers different types of botanicals and the metals up taken. Includes several outlinks for further reference.