HAL: insu-00665250, version 1

DOI: 10.1016/j.clay.2012.01.017

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Applied Clay Science 59-60 (2012) 13-18

Modelling of metal polluant leaching through a smectite.

Chantal Proust (  Corresponding author ) 1, Agnès Jullien 2, Roger Lédée 3, Lydie Le Forestier 4

(2012)

Laboratory tests are performed to characterise the soaking and retention properties of a clay barrier (Fo-Ca) under controlled homogeneous conditions. A physical model that allows calculating the retention properties and kinetics observed during the test is then detailed, and lastly simulations are examined using various soaking conditions. The results show the model predictions of cumulative cation concentrations in leachates (i.e. copper retention by clay). These curves are accurately fit by the model with the experimental data for the leaching phenomena. Clay retention capacity until reaching a physical limit in the exchanges is evidenced as well, with this limit being input into the model as the clay CEC.

1:	Institut des Sciences de la Terre d'Orléans (ISTO)
	CNRS : UMR6113 – INSU – Université d'Orléans
2:	LUNAM Université (IFSTTAR)
	Lunam Université
3:	Laboratoire PRISME (PRISME)
	Université d'Orléans : EA4229 – ENSI Bourges
4:	Institut des Sciences de la Terre d'Orléans (ISTO)
	Université d'Orléans – CNRS : UMR6113 – Université François Rabelais - Tours – INSU

subject

:

Sciences of the Universe/Continental interfaces, environment Environmental Sciences/Global Changes

keyword(s): Leaching – metals – clay – copper – kinetic – modelling – CEC

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From: Nathalie Pothier <>

Submitted on: Wednesday, 9 May 2012 11:35:28

Updated on: Wednesday, 9 May 2012 14:21:27