6533b832fe1ef96bd129afb6
RESEARCH PRODUCT
The organic carbon derived from sewage sludge as a key parameter determining the fate of trace metals.
Laurence DenaixJean LévêqueRémi ChaussodCorinne ParatFrancis Andreuxsubject
Sewage-sludgeHealth Toxicology and Mutagenesis010501 environmental sciencesChemical FractionationMESH : Carbon01 natural sciencesMESH : Soil Pollutants[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/GeochemistryMESH : Particle SizeSoil PollutantsTotal organic carbonchemistry.chemical_classificationCarbon IsotopesParticle-size fractionsSewage04 agricultural and veterinary sciencesGeneral MedicineMESH: Metals HeavyPollutionSoil contamination6. Clean water[ SDE.MCG ] Environmental Sciences/Global ChangesEnvironmental chemistryMESH : Metals HeavyFranceValorisationMESH : Carbon IsotopesMESH: Nitrogen IsotopesMESH : FertilizersEnvironmental Engineering[SDE.MCG]Environmental Sciences/Global Changesd13CAmendment[ SDV.SA.SDS ] Life Sciences [q-bio]/Agricultural sciences/Soil studychemistry.chemical_elementMESH: CarbonZincMESH: Fertilizers[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil studyMESH: Chemical FractionationTrace metalsMetals HeavyEnvironmental ChemistryOrganic matterMESH: Particle SizeParticle SizeMESH : FranceFertilizersOrganic carbonMESH: Sewage0105 earth and related environmental sciencesMESH : Nitrogen IsotopesMESH: Soil PollutantsNitrogen IsotopesMESH : Chemical FractionationPublic Health Environmental and Occupational HealthEnvironmental engineeringMESH: Carbon IsotopesGeneral ChemistryBiodegradation[ SDU.STU.GC ] Sciences of the Universe [physics]/Earth Sciences/Geochemistry[SDE.ES]Environmental Sciences/Environmental and SocietyCarbonMESH: FrancechemistryMESH : Sewage040103 agronomy & agriculture0401 agriculture forestry and fisheriesSludge[ SDE.ES ] Environmental Sciences/Environmental and Societydescription
8 pages; International audience; In a sandy agricultural soil of south-west of France, continuously cultivated with maize and amended with sewage-sludge over 20 years, the behavior of three trace metals (Cu, Pb, and Zn) was studied during the sludge applications (1974-1993) and after its cessation (1993-1998). Using the delta13C analysis, the dynamics of different sources of organic matter were followed in order to elucidate the influence of the sludge-derived organic matter on the fate of trace metals in the soil and its particle size fractions. This study revealed that sludge-derived organic matter contributed to the formation of macroaggregates through the binding of preexisting microaggregates. These macroagreggates were thus responsible for the accumulation of trace metals in the coarsest fraction as well as for the protection of maize-derived organic matter against biodegradation. After sludge application ceased, the disaggregation of macroaggregates occurred simultaneously with high losses in Cu and Pb. On the contrary, Zn appeared less affected by the cessation of sludge application, with only a location change from coarse to fine fractions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-09-01 |