Bioaccumulation of heavy metals by Phragmites australiscultivated in synthesized substrates
WANG He , JIA Yongfeng
DOI:
Received October 25, 2008,Revised April 17, 2009, Accepted , Available online
Volume 21,2009,Pages 1409-1414
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Accumulation of heavy metals from various oxides with adsorbed cadmium by wetland plant Phragmites australis was studied to
evaluate the fate of heavy metals in the sediment of constructed wetlands. Hoagland solution was used as nutrition supply, and single
metal oxide with adsorbed cadmium was applied as contaminant to study the accumulation characteristics of cadmium and the substrate
metals by P. australis. After 45-d treatment, the bioaccumulation degree in root followed the order: Al(OH)3 > Al2O3 > Fe3O4 > MnO2
> FeOOH. Heavy metals absorbed by P. australis were largely immobilized by the roots with little translocation to aboveground parts.
