Phytoextraction of metals from soils: How far from practice
2007
Nevel, L van | Mertens, J. | Oorts, K. | Verheyen, K.
For most trace elements, the technique of phytoextraction needs significant improvements to become practically feasible. Calculations for Cd revealed that the amount of Cd taken up by Thlaspi caerulescens or Salix spp. needs at least to be the double of the present amount to slightly decrease the Cd concentration in the upper 0.5 m of the soil within a period of 10 years. Additionally, metals taken up by the plants might pose an important risk. Alternatives as bioavailable contaminant stripping and phytostabilization might be more appropriate. Phytoextraction efficiency should be improved and associated risks need more attention before phytoextraction can be established as a commercial technology.
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