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Research Journal of Environmental Sciences

Year: 2011 | Volume: 5 | Issue: 5 | Page No.: 424-433
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Authors

P.E. Ndimele

A.A. Jimoh

Keywords

Research Article

Water Hyacinth (Eichhornia crassipes (Mart.) Solms.) in Phytoremediation of Heavy Metal Polluted Water of Ologe Lagoon, Lagos, Nigeria

P.E. Ndimele and A.A. Jimoh
A passive phytoremediation study was carried out between April, 2007 and March, 2008 at three sampling stations; Ibiye Jetty, Obele and Idoluwo in Ologe Lagoon, Lagos, Nigeria to ascertain the extent of heavy metal pollution and the potential of water hyacinth (Eichhornia crassipes, (Mart.) Solms) as a phytoremediant. The study assessed the levels of some heavy metals (Pb, Fe and Zn) in water and sediment (abiotic monitors) in comparison with their levels in E. crassipes (biomonitor) for phytoremediation. The observed values of the heavy metals in water, sediment and water hyacinth of Ologe Lagoon did not vary significantly (p>0.05) among the sampling stations. However, the concentrations of these metals in sediment were about 3-32 times higher than the values recorded in water. Similarly, bioconcentration factor (BCF) showed that E. crassipes accumulated the heavy metals from water in about 3-28 folds inspite of the low levels of these metals in the water column. This study showed that E. crassipes can accumulate heavy metals even when the concentrations of the metals in the abiotic components (water and sediment) of the aquatic environment is low, suggesting that E. crassipes can be used in phytoremediation of heavy metal polluted aquatic ecosystems.
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