Geochemical Processes Controlling the Formation of As-Rich Waters Within a Tailings Impoundment (Carnoulès, France)

Casiot, Corinne; Leblanc, Marc; Bruneel, Odile; Personné, Jean-Christian; Koffi, Kouadio; Elbaz-Poulichet, Françoise

doi:10.1023/b:aqua.0000028985.07557.39

Cited by 40 publications

(26 citation statements)

References 20 publications

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“…Monitoring the physicochemical parameters of Reigous Creek confirmed previous results (Casiot et al ., ; Egal et al ., ), showing a significant decrease in concentrations of dissolved As, Fe, and sulfate with increasing distance from the source: 72% of sulfate, 96% of iron, and 99% of arsenic had been removed by the time Reigous Creek flowed into the River Amous (Table S1). In addition, the concentrations of As and Fe in the water from the tailings stock were much lower in 2007–2010 (average values of 440 ± 184 mg L −1 and 4474 ± 2855 mg L −1 , respectively), than those measured in 2001 (up to 10 g L −1 for As and around 20 g L −1 for Fe, Casiot et al ., ), although these concentrations are still very high compared to other AMDs.…”

Section: Discussionmentioning

confidence: 83%

“…The water table is 1-10 m below the surface of the tailings stock, depending on the season and location. With the exception of temperature, which is almost constant with average values around 15°C, the physicochemical parameters of the groundwater vary as a function of the hydrological conditions (Casiot et al, 2003b). In 2001, the groundwater below the tailings contained extremely high levels of arsenic: up to 10 000 mg L À1 (Casiot et al, 2003b).…”

Section: Description Of the Study Sitementioning

confidence: 99%

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Diversity and spatiotemporal dynamics of bacterial communities: physicochemical and other drivers along an acid mine drainage

Volant

Bruneel

Desoeuvre

et al. 2014

FEMS Microbiol Ecol

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Deciphering the biotic and abiotic factors that control microbial community structure over time and along an environmental gradient is a pivotal question in microbial ecology. Carnoulès mine (France), which is characterized by acid waters and very high concentrations of arsenic, iron, and sulfate, provides an excellent opportunity to study these factors along the pollution gradient of Reigous Creek. To this end, biodiversity and spatiotemporal distribution of bacterial communities were characterized using T-RFLP fingerprinting and high-throughput sequencing. Patterns of spatial and temporal variations in bacterial community composition linked to changes in the physicochemical conditions suggested that species-sorting processes were at work in the acid mine drainage. Arsenic, temperature, and sulfate appeared to be the most important factors that drove the composition of bacterial communities along this continuum. Time series investigation along the pollution gradient also highlighted habitat specialization for some major members of the community (Acidithiobacillus and Thiomonas), dispersal for Acidithiobacillus, and evidence of extinction/re-thriving processes for Gallionella. Finally, pyrosequencing revealed a broader phylogenetic range of taxa than previous clone library-based diversity. Overall, our findings suggest that in addition to environmental filtering processes, additional forces (dispersal, birth/death events) could operate in AMD community.

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Section: Discussionmentioning

confidence: 83%

Section: Description Of the Study Sitementioning

confidence: 99%

Diversity and spatiotemporal dynamics of bacterial communities: physicochemical and other drivers along an acid mine drainage

Volant

Bruneel

Desoeuvre

et al. 2014

FEMS Microbiol Ecol

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“…The tailings contain around 0.7% Pb, 10% FeS 2 , and 0.2% As (Leblanc et al, 1996). Draining tailings waters exhibit strong variations of their chemical composition, which are controlled by dissolved oxygen concentrations, over the year (Casiot et al, 2003a). At high oxygen levels, extremely low pH (pH < 1.8), high As (up to 12 000 mg L À1 ), and high Fe (up to 20 000 mg L À1 ) concentrations are reached, oxidized species being predominant.…”

Section: Site Descriptionmentioning

confidence: 99%

Three-year survey of sulfate-reducing bacteria community structure in Carnoulès acid mine drainage (France), highly contaminated by arsenic

Giloteaux

Duran

Casiot

et al. 2012

FEMS Microbiol Ecol

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A 3-year survey on sulfate-reducing bacteria (SRB) was conducted in the waters of the arsenic-rich acid mine drainage (AMD) located at Carnoulès (France) to determine the influence of environmental parameters on their community structure. The source (S5 station) exhibited most extreme conditions with pH lowering to ~1.2; iron, sulfate, and arsenic concentrations reaching 6843, 29 593, and 638 mg L(-1), respectively. The conditions were less extreme at the downstream stations S1 (pH ~3.7; iron, sulfate, and arsenic concentrations of 1114, 4207, and 167 mg L(-1), respectively) and COWG (pH ~3.4; iron, sulfate, and arsenic concentrations of 854, 3134, and 110 mg L(-1), respectively). SRB community structures were characterized by terminal restriction fragment length polymorphism and library analyses based on dsrAB genes. The predominant dsrAB sequences detected were most similar to the family Desulfobulbaceae. Additionally, certain phylotypes could be related to spatio-temporal fluctuations of pH, iron, and arsenic species. For example, Desulfohalobiaceae-related sequences were detected at the most acidic sample (pH 1.4) with high iron and arsenic concentrations (6379 and 524 mg L(-1), respectively). New dsrAB sequences, with no isolated representatives, were found exclusively in COWG. This study gives new insights on SRB community dynamics in AMD systems.

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“…Correlation line from Event 2′ fitted with Pb-As data from Amous River SPM and surface bed deposit (Fig. 8c); this river is located downstream from the Carnoulès Pb-Zn mine, where exceptionally high As concentrations were recorded in the drainage waters and associated secondary precipitates (Leblanc et al, 1996;Casiot et al, 2003Casiot et al, , 2009Héry et al, 2014). Correlation line from Event 2" fitted both with Pb-As and Tl-Cd Amous River bulk sediment data and also with the Ourne and Aiguesmortes Rivers sediment data (Fig.…”

Section: Spm and Particulate Metal And Metalloid Concentrationsmentioning

confidence: 64%

Variation of dissolved and particulate metal(loid) (As, Cd, Pb, Sb, Tl, Zn) concentrations under varying discharge during a Mediterranean flood in a former mining watershed, the Gardon River (France)

Resongles

Casiot

Freydier

et al. 2015

Journal of Geochemical Exploration

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The variation of dissolved and particulate metal(loid) concentrations was investigated during a Mediterranean flood in a former mining watershed, the Gardon River (SE France), using high-temporal resolution sampling. Dissolved antimony originating from the Upper Gardon River watershed underwent dilution during flood. Conversely, dissolved As and particulate As, Pb, Zn, Cd and Tl concentrations exhibited increased values during rising flood compared to low and receding flow conditions, with a double-peak shape. As, Pb, Cd and Tl concentration data in suspended particulate matter from this double-peak were distributed along two different correlation lines, showing the successive mobilization of two groups of particles highly enriched with As and Cd or Pb and Tl, both inherited from ancient Pb/Zn mines. Metal(loid) loads during the monitored 24 h-flood event were: 0.5 kg for Cd, 19.4 kg for Sb and 204 kg for As in the dissolved phase and 24 kg for Cd, 38 kg for Tl, 94 kg for Sb, 1915 kg for As, 2860 kg for Pb and 5214 kg for Zn in the particulate phase. Altogether, these results highlighted the importance of floods in the mobilization of metals and metalloids from ancient mining sites in Mediterranean regions, showing the need for high-temporal resolution monitoring of flood events to accurately assess the long-term contribution of mining activity to metal(loid) loads of downstream watershed.Please cite this article as: Resongles, E., et al., Variation of dissolved and particulate metal(loid) (As, Cd, Pb, Sb, Tl, Zn) concentrations under varying discharge during a Medite.

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Geochemical Processes Controlling the Formation of As-Rich Waters Within a Tailings Impoundment (Carnoulès, France)

Cited by 40 publications

References 20 publications

Diversity and spatiotemporal dynamics of bacterial communities: physicochemical and other drivers along an acid mine drainage

Diversity and spatiotemporal dynamics of bacterial communities: physicochemical and other drivers along an acid mine drainage

Three-year survey of sulfate-reducing bacteria community structure in Carnoulès acid mine drainage (France), highly contaminated by arsenic

Variation of dissolved and particulate metal(loid) (As, Cd, Pb, Sb, Tl, Zn) concentrations under varying discharge during a Mediterranean flood in a former mining watershed, the Gardon River (France)

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