Potential and drawbacks of EDDS-enhanced phytoextraction of copper from contaminated soils.
Incubation and pot experiments using poplar (Populus nigra L. cv. Wolterson) were performed in order to evaluate the questionable efficiency of EDDS-enhanced phytoextraction of Cu from contaminated soils. Despite the promising conditions of the experiment (low contamination of soils with a single metal with a high affinity for EDDS, metal tolerant poplar species capable of producing high biomass yields, root colonization by mycorrhizal fungi), the phytoextraction efficiency was not sufficient. The EDDS concentrations used in this study (3 and 6 mmol kg(-1)) enhanced the mobility (up to a 100-fold increase) and plant uptake of Cu (up to a 65-fold increase). However, despite EDDS degradation and the competition of Fe and Al for the chelant, Cu leaching cannot be omitted during the process. Due to the low efficiency, further research should be focused on other environment-friendly methods of soil remediation.
Komárek
Michael
M
Department of Agro-Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences Prague, Kamýcká 129, 165 21 Prague 6, Czech Republic. komarek@af.czu.cz
Vanek
Ales
A
Mrnka
Libor
L
Sudová
Radka
R
Száková
Jirina
J
Tejnecký
Václav
V
Chrastný
Vladislav
V
D001673:Biodegradation, Environmental / Q000187:drug effects*; D002614:Chelating Agents / Q000494:pharmacology*; D003300:Copper / Q000378:metabolism*; D005029:Ethylenediamines / Q000494:pharmacology*; D032107:Populus / Q000187:drug effects* / Q000378:metabolism*; D012989:Soil Pollutants / Q000378:metabolism*; D013386:Succinates / Q000494:pharmacology*
D002614:Chelating Agents; D005029:Ethylenediamines; D012989:Soil Pollutants; D013386:Succinates; C041447:N,N'-ethylenediamine disuccinic acid; D003300:Copper