Bioaccumulation of heavy metals by Phragmites australis
cultivated in synthesized substrates |
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Authors: | WANG He and JIA Yongfeng |
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Institution: | 1. Liaoning Province Key Laboratory of Basin Pollution Control, Liaoning Academy of Environmental Sciences,
Shengyang 110031, China. E-mail: he.wangworld@yahoo.com.cn
2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. and 2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. |
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Abstract: | 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. |
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Keywords: | heavy metals bioaccumulation metal oxides adsorption |
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