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(Article of periodic en Anglais - 2013)

Document title

Impacts of weathering and clay mineralogy on heavy metals sorption in sludge-amended soils

Authors(s) and Affiliation(s)

PROUST D. (1) ; FONTAINE C. (1) ; DAUGER N. (1) ;
(1) IC2MP UMR 7285 CNRS-Univ., Poitiers, FRANCE

Abstract

This paper investigates the influence of the weathering microsystems upon the zinc, lead and cadmium behavior in a sludge-amended soil. First, the mineralogical study reveals that each rock-forming mineral weathers into specific clay minerals : amphibole gives way to smectites (saponites and montmorillonites) and plagioclase produces montmorillonites followed by kaolinite/smectite mixed layers and kaolinite. Second, each clay mineral, with its specific sorption capacity, appears to control the distribution of the heavy metals within the soil : the smectites produced by the amphiboles have high sorption capacity and favor the retention of the metals in the upper horizons of the soil; the kaolinites produced by the plagioclases have low sorption capacity and do not retain the metals in the surface horizons, which allows them to migrate to deeper horizons where they are sorbed onto the montmorillonites

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2013, vol. 101 [pp. 188-196]

Bibliographic references : 38 ref.

Collation : 6 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2012.09.005

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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