Uptake and distribution of several inorganic ions in Nephrolepis cordifolia (L.) C. Presl grown on contaminated soil

Abstract

Plants of Nephrolepis cordifolia (L.) C. Presl were grown on soil samples collected in a mine site located in Central Italy and on soil samples from uncontaminated soils to test the ability of this species to accumulate inorganic contaminants under semi-natural conditions. The plants were kept under observation for monitoring the growth and the appearance of any stress symptoms. The concentrations of inorganic ions were determined in the substrates and in different plant organs. The results indicated that N. cordifolia is able to grow vigorously on soils contaminated by inorganic ions that are potentially toxic for living organisms and that this species is able to accumulate several inorganic contaminants mainly in its underground parts. Concentrations of aluminium, iron and lead >1000 mg/kg in the underground parts were detected in plants grown on the contaminated substrate. N. cordifolia is, therefore, potentially useful as a tool for phytostabilization of contaminated soils.

Keywords:

• bioaccumulation
• bioremediation
• environmental pollution
• ferns
• heavy metals
• inorganic contaminants

Acknowledgements

Authors thank S. Mastrolitti and F. Baldassarre – ENEA Trisaia Research Centre for the helpful collaboration.