Bioaccumulation of heavy metals by Phragmites australis cultivated in synthesized substrates.
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.
Wang
He
H
Liaoning Province Key Laboratory of Basin Pollution Control, Liaoning Academy of Environmental Sciences, Shengyang 110031, China. he.wangworld@yahoo.com.cn
Jia
Yongfeng
Y
D000536:Aluminum Hydroxide / Q000378:metabolism; D000537:Aluminum Oxide / Q000378:metabolism; D001673:Biodegradation, Environmental; D002104:Cadmium / Q000378:metabolism; D005290:Ferric Compounds / Q000378:metabolism; D058085:Iron Compounds / Q000378:metabolism; D017895:Manganese Compounds / Q000378:metabolism; D019216:Metals, Heavy / Q000378:metabolism*; D010087:Oxides / Q000378:metabolism; D006109:Poaceae / Q000378:metabolism*; D053833:Wetlands
D005290:Ferric Compounds; D058085:Iron Compounds; D017895:Manganese Compounds; D019216:Metals, Heavy; D010087:Oxides; D002104:Cadmium; D000536:Aluminum Hydroxide; D000537:Aluminum Oxide; C016552:manganese dioxide