Résumé L’antimoine (Sb) est un polluant prioritaire émergent dans l’environnement et un élémentpotentiellement cancérigène. L’objectif général de cette thèse est de contribuer à explorer le potentiel des isotopesstables de l’antimoine...
Highlights Soils are locally affected by extreme Pb and moderate Sb contamination.Anthropogenic soil contamination is restricted to the surface horizons.Antimony isotopes allowed to discriminate Sb from mining vs metallurgical sources.Pb-Sb isotope coupling is a...
Highlights Experimental study of Sb isotope fractionation during its sorption on iron minerals.Light isotope of Sb was preferentially adsorbed on schwertmannite and ferrihydrite.Equilibrium fractionation factor (Δ123Sbsolid-solution) between −0.36 ‰ and −0.25 ‰....
Highlights Antimony isotope fractionation during oxidation documented for the first time.Biotic and chemical oxidation fractionated Sb isotopes in opposite direction.Multi-step reactions underlie the fractionation process. Abstract Oxidation of antimonite (Sb(III)) to...
Highlights First estimation of equilibrium Sb isotope fractionation factors among Sb minerals.PBEsol pseudopotential best reproduces Sb mineral lattices and Raman frequencies.Factors affecting Sb isotope fractionation: Sb oxidation > change in Sb first-neighbour...