Effect of citric acid and EDTA on chromium and nickel uptake and translocation by Datura innoxia.
EDTA and citric acid were tested to solubilize metals and enhance their uptake by Datura innoxia, chosen because of its ability to accumulate and tolerate metals. Two application modes were used on an industrial soil contaminated mainly by Cr and Ni. The results showed that citric acid was the most effective at increasing the uptake of Cr and EDTA for Ni. These results are consistent with the effectiveness of both chelants in solubilizing metals from the soil. The translocation factor (TF) of Ni was 1.6- and 6.7-fold higher than the control, respectively, for one and two applications of 1mmolkg(-1) EDTA. After two applications of 5 and 10mmolkg(-1) citric acid, the TF of Cr increased 2- and 3.5-fold relative to the control. Whatever the concentration, the application of EDTA modified the plant physiology significantly. For citric acid this was only observed with the highest dose (10mmolkg(-1)).
Jean
Liliane
L
Groupe de Recherche Eau Sol Environnement (GRESE), Université de Limoges 123 avenue Albert Thomas, 87060 Limoges, France.
Bordas
François
F
Gautier-Moussard
Cécile
C
Vernay
Philippe
P
Hitmi
Adnane
A
Bollinger
Jean-Claude
JC
D001673:Biodegradation, Environmental; D002614:Chelating Agents; D002857:Chromium / Q000032:analysis / Q000378:metabolism*; D019343:Citric Acid; D032302:Datura / Q000378:metabolism*; D004492:Edetic Acid; D052918:Environmental Restoration and Remediation / Q000379:methods*; D007220:Industrial Waste; D009532:Nickel / Q000032:analysis / Q000378:metabolism*; D018517:Plant Roots / Q000737:chemistry; D018520:Plant Shoots / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
D002614:Chelating Agents; D007220:Industrial Waste; D012989:Soil Pollutants; D002857:Chromium; D019343:Citric Acid; D009532:Nickel; D004492:Edetic Acid