Fate of Sb(V) and Sb(III) species along a gradient of pH and oxygen concentration in the Carnoulès mine waters (Southern France)
- Resongles, Eleonore
- Casiot, Corinne
- Elbaz-Poulichet, Françoise
- Freydier, Rémi
- Bruneel, Odile
- Piot, Christine
- Delpoux, Sophie
- Volant, Aurelie
- Desoeuvre, Angélique
DOIAbstract
International audienceThe speciation and behaviour of antimony were investigated in surface waters downstream from the abandoned Pb–Zn Carnoulès mine (Gard, France). These waters exhibit a permanent gradient of oxygen concentration and pH, ranging from acid suboxic in Reigous Creek at the outlet of sulfide tailings impoundment, to near neutral oxygenated at downstream sites along the rivers Amous and Gardon. The concentration of total dissolved (<0.22 μm) antimony, acquired through a seven-year monitoring, decreased from 7.7–409.9 μg L−1 at the source of Reigous Creek to 0.22–0.45 μg L−1 in the Gardon River, showing natural Sb attenuation. Speciation analysis carried out during three surveys indicated that Sb(III) represented up to 70% of t...
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