The use of poplar during a two-year induced phytoextraction of metals from contaminated agricultural soils.
The efficiency of poplar (Populus nigra L.xPopulus maximowiczii Henry.) was assessed during a two-year chemically enhanced phytoextraction of metals from contaminated soils. The tested metal mobilizing agents were EDTA (ethylenediaminetetraacetic acid) and NH4Cl. EDTA was more efficient than chlorides in solubilizing metals (especially Pb) from the soil matrix. The application of chlorides only increased the solubility of Cd and Zn. However, the increased uptake of metals after the application of higher concentrations of mobilizing agents was associated with low biomass yields of the poplar plants and the extraction efficiencies after the two vegetation periods were thus comparable to the untreated plants. Additionally, the application of mobilizing agents led to phytotoxicity effects and increased mobility of metals. Higher phytoextraction efficiencies were observed for Cd and Zn compared to Pb and Cu. Poplars are therefore not suitable for chemically enhanced phytoextraction of metals from severely contaminated agricultural soils.
Komárek
Michael
M
Department of Agrochemistry and Plant Nutrition, Czech University of Agriculture in Prague, Kamýcká 129, 165 21, Prague 6, Czech Republic. komarek@af.czu.cz
Tlustos
Pavel
P
Száková
Jirina
J
Chrastný
Vladislav
V
D000383:Agriculture; D000643:Ammonium Chloride / Q000494:pharmacology; D001673:Biodegradation, Environmental; D018533:Biomass; D002614:Chelating Agents / Q000494:pharmacology; D005591:Chemical Fractionation; D018153:Czech Republic; D004492:Edetic Acid / Q000494:pharmacology; D019216:Metals, Heavy / Q000633:toxicity; D008906:Mining; D018515:Plant Leaves / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D032107:Populus / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000633:toxicity
D002614:Chelating Agents; D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants; D000643:Ammonium Chloride; D004492:Edetic Acid