0000000000827495

AUTHOR

G. Soulas

showing 3 related works from this author

Techniques d'évaluation de l'écotoxicité des substances xénobiotiques vis à vis de la microflore des sols

1999

Les micro-organismes du sol sont les principaux agents du recyclage des éléments dans le sol et, plus généralement, de la fertilité des sols agricoles. Ces derniers sont aussi la voie de passage obligée de nombreuses molécules xénobiotiques dont certaines représentent une menace en raison de leur impact écotoxicologique. Les micro-organismes du sol sont donc parmi les premiers organismes exposés. Deux voies sont actuellement possibles pour évaluer les effets secondaires des substances xénobiotiques sur la microflore des sols. Pendant longtemps, ce sont les caractéristiques de taille et d'activité de la microflore, les plus en rapport avec le fonctionnement biologique des sols, qui ont été c…

[SDV] Life Sciences [q-bio][SDE] Environmental Sciences[ SDE ] Environmental SciencesMICROFLORESOLECOTOXICITE[SDV]Life Sciences [q-bio][SDE]Environmental SciencesMICROORGANISMESUBSTANCE XENOBIOTIQUEComputingMilieux_MISCELLANEOUS
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Variability of pesticide mineralization in individual soil aggregates of millimeter size

2002

The aim of this study was to compare the 2,4-D mineralization in individual aggregates of millimeter size (3 size classes and 96 aggregates per size class). 14 CO 2 coming from the mineralization of 14 C ring-labeled 2,4-D and evolved by each aggregate incubated in microtiter plates was trapped with barium hydroxide on filters and measured using a Phosphorimager. We observed an important variability of mineralization in aggregates of each size class and in the different size classes of aggregates. The main factors responsible for these fluctuations could be a heterogeneous distribution of degrading microorganisms or of available carbon necessary for cometabolism.

[SDE] Environmental SciencesAggregate (composite)[SDV]Life Sciences [q-bio]Microorganismchemistry.chemical_elementCometabolismMineralization (soil science)Barium hydroxide[SDV] Life Sciences [q-bio]chemistry.chemical_compoundchemistryEnvironmental chemistry[SDE]Environmental Sciences24 DCarbon dioxideMicrobial biodegradationCarbon
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Degradation of 2,4‐D, 2,4‐Dichlorophenol, and 4‐Chlorophenol in Soil after Sorption on Humified and Nonhumified Organic Matter

1999

Soil organic matter (SOM) primarily governs sorption processes and therefore affects the availability of organic chemicals to degrading microorganisms. Transformations of 14 C-ring-labeled 2,4-dichlorophenoxyacetic acid (2,4-D); 2,4-dichlorophenol (2,4-DCP); and 4-chlorophenol (4-CP) sorbed on organic materials with increasing degrees of humification (wood, fresh straw, composted straw, ligain, and humic acid) and on a reference mineral sorbent (Al-oxide) were studied during soil incubation experiments. Chemicals previously sorbed on the different sorbents were applied to the soil. Mineralization kinetics, analysis of water and methanol extracts and measurements of the nonextractable radioa…

[SDE] Environmental SciencesEnvironmental Engineering[SDV]Life Sciences [q-bio]24-D010501 environmental sciencesManagement Monitoring Policy and Law01 natural sciencesHumic acidOrganic matterWaste Management and DisposalComputingMilieux_MISCELLANEOUS0105 earth and related environmental sciencesWater Science and Technology2. Zero hungerchemistry.chemical_classification24-DCPSoil organic matterSorption04 agricultural and veterinary sciencesMineralization (soil science)15. Life on landBiodegradationPollutionSoil contaminationHumus[SDV] Life Sciences [q-bio]chemistry13. Climate actionEnvironmental chemistry[SDE]Environmental Sciences040103 agronomy & agriculture0401 agriculture forestry and fisheriesJournal of Environmental Quality
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