Casiot C. auteur aut IRD Egal M. auteur aut IRD Bruneel Odile auteur aut IRD Verma N. auteur aut IRD Parmentier M. auteur aut IRD Elbaz Poulichet F. auteur aut IRD text journalArticle eng text/pdf born digital access 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. specialized FRANCE 062 096 45 6 2056-2064 2011 0013-936X https://www.documentation.ird.fr/hor/fdi:010053434 10.1021/es102064r 0013-936X [F B010053434] https://www.documentation.ird.fr/hor/fdi:010053434 https://www.documentation.ird.fr/intranet/publi/2011/04/010053434.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2011-05-02 2022-02-13 fdi:010053434 fre