Publications des scientifiques de l'IRD

Casiot C., Egal M., Bruneel Odile, Verma N., Parmentier M., Elbaz Poulichet F. (2011). Predominance of aqueous Tl(I) species in the river system downstream from the abandoned Carnoulès mine (Southern France). Environmental Science and Technology, 45 (6), p. 2056-2064. ISSN 0013-936X.

Titre du document
Predominance of aqueous Tl(I) species in the river system downstream from the abandoned Carnoulès mine (Southern France)
Année de publication
2011
Type de document
Article référencé dans le Web of Science WOS:000288146200005
Auteurs
Casiot C., Egal M., Bruneel Odile, Verma N., Parmentier M., Elbaz Poulichet F.
Source
Environmental Science and Technology, 2011, 45 (6), p. 2056-2064 ISSN 0013-936X
Thallium concentration reached up to 534 mu g L-1 in the Reigous acid mine drainage downstream from the abandoned Pb-Zn Carnoules mine (Southern France). It decreased to 5.44 mu g L-1 in the Amous River into which the Reigous creek flows. TI(I) predominated (> 98% of total dissolved Tl) over Tl(III), mainly in the form of Tl+. Small amounts of Tl(III) evidenced in Reigous Creek might be in the form of aqueous TlCl2+. The range of dissolved to particulate distribution coefficients log K-d = 2.5 L kg(-1) to 4.6 L kg(-1) indicated low affinity of Tl for particles, mainly ferrihydrite, formed in the AMD-impacted watershed. The low retention of Tl+ on ferrihydrite was demonstrated in sorption experiments, the best fit between experimental and modeled data being achieved for surface complexation constants log K-ads = -2.67 for strong sites and log K-ads = -3.76 for weak sites. This new set of constants allowed reasonable prediction of the concentrations of aqueous and particulate Tl resulting from the mixing of water from Reigous Creek and the Amous River water during laboratory experiments, together with those measured in the Amous River field study.
Plan de classement
Hydrologie [062] ; Economie : secteurs d'activité [096]
Description Géographique
FRANCE
Localisation
Fonds IRD [F B010053434]
Identifiant IRD
fdi:010053434
Contact