Comment on “Phase Associations and Mobilization of Iron and Trace Elements in Coeur d'Alene Lake, Idaho”

and, Arthur J. Horowitz; Elrick, Kent A.; Cook, Robert B.

doi:10.1021/es980498t

Cited by 5 publications

(5 citation statements)

References 12 publications

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“…Horowitz et al (1995) reported the Coeur d'Alene River (CDAR) and adjacent lake sediments showed the greatest level of contamination with heavy metals. Batch sequential extractions indicate that heavy metals in the delta region of LCDA appear to be associated with an operationally defined sulfidic phase (Harrington et al, 1998b), while those elsewhere in LCDA appear to be predominantly associated with the more mobile hydroxides (Horowitz et al, 1995;Woods and Beckwith, 1997), though there is some controversy on this point (Horowitz et al, 1999). Haus and colleagues (2008) employed sequential extractions in combination with high resolution mass spectrometry and electron microscopy to study seasonal influences on arsenic speciation in the lateral lakes surrounding the CDAR.…”

Section: Pyrite [Fes 2 ] Chalcopyrite [Cufes 2 ]mentioning

confidence: 99%

Microbial community signature in Lake Coeur d’Alene: Association of environmental variables and toxic heavy metal phases

Moberly

D’Imperio

Parker

et al. 2016

Applied Geochemistry

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The water and sediments of Lake Coeur d'Alene in northern Idaho (USA) have been impacted by decades of mining operations within the Coeur d'Alene mining district. Using a multivariate statistical approach, correlations were explored between the microbial community (via 16S rDNA microarray) in sediment cores and operationally defined heavy metal phases (via continuous sequential extractions). Candidate phyla NC10, OP8 and LD1PA were only detected in metal contaminated cores and diversity doubled among Natronoanaerobium in metal contaminated cores compared to the uncontaminated control site. This may suggest some increased fitness of these phyla in contaminated sediments. In contrast, diversity within the phyla Aquificae, Coprothermobacteria, and Synergistes was at least double in the uncontaminated control site. In linear models composed of two geochemical variables from the presumed sulfate reducing lineages detected in this study, orders Desulfobacterales, Desulfuromonadales, Desulfotomaculum, and Syntrophobacterales were highly correlated with Pb (positive influence) and Zn (negative influence) in the operationally defined residual fraction, and most taxa within orders from Desulfovibrionales. Bdellovibrionales highly correlated with Pb in the exchangeable/carbonate (negative influence) and oxyhydroxide (positive influence) phases. Diversity within families from metal reducing bacterial lineages Shewanellaceae, Geobacteraceae, and Rhodocyclaceae showed high correlation with Pb in the exchangeable/carbonate (negative influence) and oxyhydroxide (positive influence) phases. To our knowledge, this is the first time these techniques have been used in combination to describe a contaminated system. Resulting correlations suggest the diversity of the microbial community was influenced primarily by partitioning of heavy metals into exchangeable Pb over other Pb phases and, to a lesser extent, residual Pb to residual Zn phase partitioning.

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Section: Pyrite [Fes 2 ] Chalcopyrite [Cufes 2 ]mentioning

confidence: 99%

Microbial community signature in Lake Coeur d’Alene: Association of environmental variables and toxic heavy metal phases

Moberly

D’Imperio

Parker

et al. 2016

Applied Geochemistry

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“…Prior research to characterize sediment geochemistry has produced inconsistent and contradictory results (7). Surface sediment grab samples collected in Lake CDA, and analyzed using selective sequential extraction, indicate 95% of the Pb, 90% of the Cd, 80% of the Zn, 75% of the As, and 55% of the Cu are associated with an operationally defined iron oxide phase (4).…”

Section: Introductionmentioning

confidence: 99%

Metal(loid) Diagenesis in Mine-Impacted Sediments of Lake Coeur d'Alene, Idaho

Toevs

Morra

Polizzotto

et al. 2006

Environ. Sci. Technol.

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Mining activity along the South Fork of the Coeur d' Alene River in northern Idaho has resulted in fluvial mine tailings enriched in Pb, As, Ag, Sb, Hg, Cd, and Zn deposited on the lakebed of Lake Coeur d'Alene, thus serving as a potential benthic source of inorganic contaminants. Our objective was to characterize the dominant solid phase materials and diagenetic processes controlling metal(loid) solubilities, and thus their potential release to the overlying water column. Aqueous and solid concentrations of metal(loid) contaminants were examined along with distinct species of Fe and S within sediments and interstitial water. A gradient from oxic conditions at the sediment-water interface to anoxic conditions below 15 cm exists at all sites, resulting in a dynamic redox environment that controls the partitioning of contaminants. Fluvial deposition from frequent seasonal flood events bury ferric oxides residing at the sediment-water interface leading to reductive dissolution as they transition to the anoxic zone, consequently releasing associated metal(loids) to the interstitial water. Insufficient sulfur limits the formation of sulfidic minerals, but high carbonate content of this mining region buffers pH and promotes formation of siderite. Diagenetic reactions create chemical gradients encouraging the diffusion of metal(loids) toward the sediment--water interface, thereby, increasing the potential for release into the overlying water.

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“…Horowitz et al (1995a) found that the CdAR and adjacent lake sediments were the most heavily contaminated. Heavy metals in the delta region of LCdA appear to be associated with an operationally defined sulfidic phase (Harrington et al 1998b), while those elsewhere in LCdA appear to be predominantly associated with the more mobile hydroxides (Horowitz et al 1995a;Woods and Beckwith 1997), though there is some controversy on this point (Horowitz et al 1999).…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal–Mineral Associations in Coeur d’Alene River Sediments: A Synchrotron-Based Analysis

Moberly

Borch

Sani

et al. 2008

Water Air Soil Pollut

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Nearly a century of mining activities upstream have contaminated Lake Coeur d'Alene and its tributaries with Pb, Zn, and other heavy metals. Heavy metal concentrations in sediments of the Coeur d'Alene watershed have been shown to be inversely proportional to the sediment size fraction; thus, analysis on a very small scale is essential to determine the mobility and stability of heavy metals in this environment. Micron-scale synchrotron-based methods were used to determine the association of heavy metals with solid phases in sediments of the Coeur d'Alene River. Bulk X-ray diffraction (XRD), extended X-ray absorption fine structure spectroscopy, and synchrotron-based microfocused XRD combined with microfocused X-ray fluorescence mapping indicate the presence of crystalline Pb-and

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Comment on “Phase Associations and Mobilization of Iron and Trace Elements in Coeur d'Alene Lake, Idaho”

Cited by 5 publications

References 12 publications

Microbial community signature in Lake Coeur d’Alene: Association of environmental variables and toxic heavy metal phases

Microbial community signature in Lake Coeur d’Alene: Association of environmental variables and toxic heavy metal phases

Metal(loid) Diagenesis in Mine-Impacted Sediments of Lake Coeur d'Alene, Idaho

Heavy Metal–Mineral Associations in Coeur d’Alene River Sediments: A Synchrotron-Based Analysis

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