HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Echevarria, G. Articles by Leclerc-Cessac, E. Search for Related Content PubMed Articles by Echevarria, G. Articles by Leclerc-Cessac, E. Agricola Articles by Echevarria, G. Articles by Leclerc-Cessac, E.

Assessment of Phytoavailability of Nickel in Soils

Lab. of Soil and Environmental Sciences, ENSAIA-INRA/INPL, BP 172, 2, Ave. de la forêt de Haye, F-54505 Vandoeuvre-lès-Nancy Cédex, France;

J. C. Fardeau

INRA-Unité de Science du Sol, Route de St. Cyr, 78026 Versailles Cédex, France;

E. Leclerc-Cessac

Agence Nationale pour la Gestion des Déchets Radioactifs (ANDRA), Parc de la Croix Blanche, 1-7, rue Jean Monnet, F-92298 Châtenay-Malabry Cédex, France.

^* Corresponding author (morel{at}ensaia.u-nancy.fr).

ABSTRACT

Methods are needed for the rapid characterization of the phytoavailable fraction of trace elements in soils to assess the risk of contamination of the food chain and evaluate the impact of waste management practices. This investigation was undertaken to study the phytotavailability of Ni in soils using the isotopic exchange method. Isotopic exchange of ⁶³Ni²⁺ ions was studied in two soils, a silt loam and a clayey muck, and the isotopic composition of Ni in the soil solution was determined. Plant tests were conducted on the same soils amended with ⁶³Ni²⁺, and the isotopic composition of Ni in the plant tissues was also measured. The isotopic composition of Ni in soil extracted by DTPA at the end of the culture was also determined. Results showed that the isotopic composition of Ni in the soil solution was identical to the isotopic composition of Ni taken up by plants during the same time. The Ni in the plant came exclusively from the pool of the isotopically exchangeable Ni of the soil. Also, under these experimental conditions, DTPA extracted mainly isotopically exchangeable Ni, reinforcing the validity of this chemical to assess the phytoavailability of Ni. Besides, the phytoavailable soil Ni could be characterized with the intensity, quantity, and capacity factors deduced from isotopic exchange kinetics. The kinetics for which parameters were obtained from short-term experiments were successfully extrapolated to longer times of exchange corresponding to plant growth which demonstrated that isotopic exchange kinetics is an appropriate tool to assess the truly phytoavailable Ni in soils. This technique requires more data from many different soils before it can be used for routine measurements.

This article has been cited by other articles:

				I. W. Oliver, A. Hass, G. Merrington, P. Fine, and M. J. McLaughlin Copper Availability in Seven Israeli Soils Incubated with and without Biosolids J. Environ. Qual., March 1, 2005; 34(2): 508 - 513. [Abstract] [Full Text] [PDF]

				C. W. Gray, R. G. McLaren, D. Gunther, and S. Sinaj An Assessment of Cadmium Availability in Cadmium-Contaminated Soils using Isotope Exchange Kinetics Soil Sci. Soc. Am. J., July 1, 2004; 68(4): 1210 - 1217. [Abstract] [Full Text] [PDF]

				D. Hammer and C. Keller Changes in the Rhizosphere of Metal-Accumulating Plants Evidenced by Chemical Extractants J. Environ. Qual., September 1, 2002; 31(5): 1561 - 1569. [Abstract] [Full Text] [PDF]