Skip to Main content Skip to Navigation
Theses

Mobilité et redistribution à long terme des éléments traces métalliques exogènes dans les sols : Application à des Luvisols pollués par 100 ans d'épandage d'eaux usées brutes dans la plaine de Pierrelaye

Abstract : In order to determine the main factors responsible for the distribution of exogenous trace metals (TM) in soil, we used an integrated multi-scale approach: constituents, solum and transect at the plot scale. This approach was applied to sandy Luvisols of Paris region that are highly polluted due to 100 years of raw wastewater irrigation. Endogenous and exogenous TM contents were estimated in order to study the fate of those brought by the wastewater.
In the ploughed surface horizon, the spatial distribution of TMs depends on the spatial design of the spreading system and on the plot topography.
No exogenous Pb and Cr are present in the deep horizons (0.4-1 m). This result is coherent with the speciation of these elements which is similar in the polluted and in the unpolluted solum. TMs inputs to the soil were estimated using TM/Cr ratios in soil and in wastewater. This estimation showed that the Pb brought by the wastewater to the soil was kept within the soil surface horizon. Stocks of exogenous Cu and Zn in the deep horizons showed that these elements migrated downward, Cu being more exported than Zn which has been retained more efficiently than Cu along the solum. Constituents and mechanisms responsible for Cu fixation along the solum were not identified. Zinc was mainly retained by iron and manganese oxides. The quantity of zinc retained was a function of the number of sites available and of their accessibility, which was in turn a function of the distribution of water fluxes within the plot.
Document type :
Theses
Complete list of metadatas

Cited literature [170 references]  Display  Hide  Download

https://pastel.archives-ouvertes.fr/tel-00070810
Contributor : Christelle Dere <>
Submitted on : Saturday, May 20, 2006 - 1:43:58 PM
Last modification on : Saturday, June 6, 2020 - 1:09:37 PM
Long-term archiving on: : Sunday, April 4, 2010 - 9:56:52 PM

Identifiers

  • HAL Id : tel-00070810, version 1
  • PRODINRA : 318704

Collections

Citation

Christelle Dere. Mobilité et redistribution à long terme des éléments traces métalliques exogènes dans les sols : Application à des Luvisols pollués par 100 ans d'épandage d'eaux usées brutes dans la plaine de Pierrelaye. Sciences de la Terre. ENGREF (AgroParisTech), 2006. Français. ⟨tel-00070810⟩

Share

Metrics

Record views

631

Files downloads

8965