Uptake of XXXX in willow and poplar trees in a long term greenhouse experiment.

@entity3789 @entity137 @entity9970
Phytoremediation of sites contaminated with iron cyanides can be performed using poplar and willow trees. Poplar and willow trees were grown in potting substrate spiked with @entity9970 concentrations of up to 2,000  mg  kg(-1) for 4 and 8  weeks respectively. Soil solution and leaf tissue of different age were sampled for total @entity3789 analysis every week. Chlorophyll content in the leaves was determined to quantify @entity3789 @entity137 . Results showed that @entity3789 in the soil solution of spiked soils differed between treatments and on weekly basis and ranged from 0.5 to 1,200  mg  l(-1). The maximum @entity3789 content in willow and poplar leaves was 518  mg  kg(-1) fresh weight (FW) and 148  mg  kg(-1) FW respectively. @entity3789 accumulated in the leaves increased linearly with increasing @entity3789 concentration in the soil solution. On the long term, significantly more @entity3789 was accumulated in old leaf tissue than in young tissue. Chlorophyll content in poplar decreased linearly with increasing @entity3789 in the soil solution and in leaf tissue, and over time. The inhibitory concentration (IC50) value for poplars after 4  weeks of exposure was 173  mg  l(-1) and for willow after 8  weeks of exposure-768  mg  l(-1). Results show that willows tolerate much more @entity3789 and over a longer period than poplars, making them very appropriate for remediating sites highly contaminated with iron cyanides.
