Nastaran Manouchehri, Stéphane Besançon, Alain Bermond
AgroParisTech., Laboratoire de Chimie Analytique, 16 rue Claude Bernard, 75231 Paris, cedex 05, France. manouche@agroparistech.fr
Chemosphere 2011 MayThe kinetic aspects are not usually tackled when mimicking the soil trace metal mobilization. In this work, a simple procedure is developed for measuring the kinetics of Pb, Cu and Cd transfer from the soil solid phase towards a resin sink. A ternary system of Soil/EDTA/Chelex was employed for mimicking the metal transfer from two agricultural soil samples into the Chelex. Two different kinetic regimes (P(1) and P(2)) were observed. The kinetic profile of Pb was distinctly different from those of Cd and Cu. Basing on kinetic principles, two kinetic models were proposed for estimating the apparent rate constants of leaching and removal processes in, respectively, two binary mixtures of soil/EDTA and EDTA extracts/Chelex. Contrary to Pb, solid phase pools of Cd and Cu exchanged with the solution on short time scales. The kinetic rate of desorption occurred in following order: Pb
Nastaran Manouchehri, Stéphane Besançon, Alain Bermond. Kinetic characterizing of soil trace metal availability using Soil/EDTA/Chelex mixture. Chemosphere. 2011 May;83(7):997-1004
PMID: 21377711
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