Casiot C. auteur aut IRD Egal M. auteur aut IRD Elbaz-Poulichet F. auteur aut IRD Bruneel Odile auteur aut IRD Bancon-Montigny C. auteur aut IRD Cordier M. A. auteur aut IRD Gomez E. auteur aut IRD Aliaume C. auteur aut IRD text journalArticle eng text/pdf born digital access Dissolved and particulate concentrations of metals (Fe, Al, Mn, Co, Ni, Cu, Zn, Cd, Tl, Pb) and As were monitored over a 5 year period in the Amous River downstream of its confluence with a creek severely affected by acid mine drainage (AMD) originating from a former Pb-Zn mine. Water pH ranged from 6.5 to 8.8. Metals were predominantly in dissolved form, except Fe and Pb, which were in particulate form. In the particulate phase, metals were generally associated with Al oxides, whereas As was linked to Fe oxides. Metal concentrations in the dissolved and/or particulate phase were generally higher during the wet season due to higher generation of AMD. Average dissolved (size < 0.22 mu m) metal concentrations (mu g/L) were 1 +/- 4 (Fe), 69 +/- 49 (Al), 140 +/- 118 (Mn), 4 +/- 3 Co, 6 +/- 4 (Ni), 1.3 +/- 0.8 (Cu), 126 +/- 81 (Zn), 1.1 +/- 0.7 (Cd), 0.9 +/- 0.5 (Tl), 2 +/- 3 (Pb). Dissolved As concentrations ranged from 5 to 134 mu g/L (30 +/- 23 mu g/L). During the survey, the concentration of colloidal metals (5 kDa < size < 0.22 mu m) was less than 25% of dissolved concentrations. Dissolved metal concentrations were generally higher than the maximum concentrations allowed in European surface waters for priority substances (Ni, Cd and Pb) and higher than the environmental quality standards for other compounds. Using Diffusion Gradient in Thin Film (DGT) probes, metals were shown to be in potentially bioavailable form. The concentrations in Leuciscus cephalus were below the maximum Pb and Cd concentrations allowed in fish muscle for human consumption by the European Water Directive. Amongst the elements studied, only As, Pb and Tl were shown to bioaccumulate in liver tissue (As, Pb) or otoliths (Tl). Bioaccumulation of metals or As was not detected in muscle. specialized 036 062 24 5 787-799 2009 0883-2927 https://www.documentation.ird.fr/hor/fdi:010046095 10.1016/j.apgeochem.2009.01.006 0883-2927 [F B010046095] https://www.documentation.ird.fr/hor/fdi:010046095 https://www.documentation.ird.fr/intranet/publi/2009/06/010046095.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-07-08 2017-08-23 fdi:010046095 fre