title: Effect of citric acid and EDTA on chromium and nickel uptake and translocation by Datura innoxia.
abstract: 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)).
authors.affiliation: Groupe de Recherche Eau Sol Environnement (GRESE), Université de Limoges 123 avenue Albert Thomas, 87060 Limoges, France.
authors.forename: Liliane
authors.initials: L
authors.lastname: Jean
authors.forename: François
authors.initials: F
authors.lastname: Bordas
authors.forename: Cécile
authors.initials: C
authors.lastname: Gautier-Moussard
authors.forename: Philippe
authors.initials: P
authors.lastname: Vernay
authors.forename: Adnane
authors.initials: A
authors.lastname: Hitmi
authors.forename: Jean-Claude
authors.initials: JC
authors.lastname: Bollinger
mesh_terms: 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*
chemical_list: D002614:Chelating Agents; D007220:Industrial Waste; D012989:Soil Pollutants; D002857:Chromium; D019343:Citric Acid; D009532:Nickel; D004492:Edetic Acid