PHYTOREMEDIATION POTENTIAL OF HEAVY METAL IN CONTAMINATED SEDIMENTS BY HYDROPHYTES

Phytoremediation is a feasible method for re mediation of heavy metals contaminated sediments. Wenchang Lake (Zibo, China), had been used as a receiving water body of industrial factories, were sampled to investigate the phytoremediation characteristics of heavy metals in sediments by the natural growing hydrophytes. The results showed that Hydrocharis dubia, Phragmites australis, Nelumbo nucifera, and Typha orientalis Presl have a good potential to accumulate of As, Cd, and Pb from the sediments. The metal concentrations of As, Cd, and Pb range from 199.94-552.07 mg kg(-1), 1.88-3.89 mg kg(-1), and 27.87-53.19 mg kg(-1) in the roots or fronts of the hydrophytes, respectively. Bioconcentration factor (BCF) values of As, Cd, and Pb in roots and fronds of the tested hydrophytes range from 6.97-19.24, 5.53-11.44, and 3.65-6.96 respectively. Therefore, Hydrocharis dubia, Phragmites australis, Nelumbo nucifera, and Typha orientalis Presl were potential accumulators for As, Cd, and Pb, and could be used for phytoremediation of heavy metals contaminated sediments in the aquatic body.