Analysis of arsenic speciation in mine contaminated lacustrine sediment using selective sequential extraction, HR-ICPMS and TEM

Haus, Kelly L.; Hooper, Robert L.; Strumness, L. A.; Mahoney, J. Brian

doi:10.1016/j.apgeochem.2007.11.005

Cited by 21 publications

(14 citation statements)

References 30 publications

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“…As nanoparticles are ubiquitous in nature and have already been found associated with metals in this particular system [2,28,29] and other mine drainage locales, [1,30] it is likely that they are affecting trace metal mobility and bioavailability. The goal of this study was to determine associations existing between nanoparticles and trace metals in order to better elucidate these complex relationships.…”

Section: Introductionmentioning

confidence: 99%

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Using FlFFF and aTEM to determine trace metal–nanoparticle associations in riverbed sediment

et al. 2010

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Environmental context. Determining associations between trace metals and nanoparticles in contaminated systems is important in order to make decisions regarding remediation. This study analysed contaminated sediment from the Clark Fork River Superfund Site and discovered that in the <1-µm fraction the trace metals were almost exclusively associated with nanoparticulate Fe and Ti oxides. This information is relevant because nanoparticles are often more reactive and show altered properties compared with their bulk equivalents, therefore affecting metal toxicity and bioavailability.Abstract. Analytical transmission electron microscopy (aTEM) and flow field flow fractionation (FlFFF) coupled to multi-angle laser light scattering (MALLS) and high-resolution inductively coupled plasma mass spectroscopy (HR-ICPMS) were utilised to elucidate relationships between trace metals and nanoparticles in contaminated sediment. Samples were obtained from the Clark Fork River (Montana, USA), where a large-scale dam removal project has released reservoir sediment contaminated with toxic trace metals (namely Pb, Zn, Cu and As) which had accumulated from a century of mining activities upstream. An aqueous extraction method was used to recover nanoparticles from the sediment for examination; FlFFF results indicate that the toxic metals are held in the nano-size fraction of the sediment and their peak shapes and size distributions correlate best with those for Fe and Ti. TEM data confirms this on a single nanoparticle scale; the toxic metals were found almost exclusively associated with nano-size oxide minerals, most commonly brookite, goethite and lepidocrocite.

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Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] These metals can exist and be transported in various ways, such as dissolved species in solution, sorbed on or incorporated into inorganic particulates, and complexed by organic matter. Since these different species and size fractions will be affected by different transport processes (e.g.…”

Section: Introductionmentioning

confidence: 99%

Using FlFFF and aTEM to determine trace metal–nanoparticle associations in riverbed sediment

et al. 2010

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“…Hematite is also a common nanoparticle in the CCR (Fig. 4a), acid mine drainage effluent (Haus et al 2008), The hematite nanoparticles in the CCR are spherical and highly aggregated (Fig. 4b).…”

Section: Oxides and Hydroxidesmentioning

confidence: 99%

“…The XRDaccelerating voltage was 20 KV and the beam current was 10 −10 A. The occurrence of mineral species was also investigated by means of an environmental scanning electron microscope coupled with an energy dispersive X-ray microanalysis system (EDX; Querol et al 2008) and transmission electron microscopy for chemical analyses of individual particles was also conducted (Silva et al 2009a;Haus et al 2008). Hexane, acetone, dichloromethane, and methanol were tested as suitable suspension medium.…”

Section: Analytical Proceduresmentioning

confidence: 99%

Coal cleaning residues and Fe-minerals implications

Silva

Macı́as

Oliveira³

et al. 2010

Environ Monit Assess

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In the present investigation, a study was undertaken to understand the origin of Fe-minerals presents in Brazilian coal mining and to understand the environmental implication and the chemical heterogeneity in the study area. Coal cleaning residue samples rich in clays, quartz, sulphides, carbonates, sulphates, etc. were sampled from Lauro Muller, Urussanga, Treviso, Siderópolis, and Criciúma cities in the Santa Catarina State and a total of 19 samples were collected and Mössbauer, XRD, SEM/EDX, and TEM analyses were conducted on the samples. The major Fe-minerals identified are represented by the major minerals chlorite, hematite, illite, and pyrite, while the minor minerals include, ankerite, chalcopyrite, goethite, hematite, jarosite, maghemite, magnetie, marcasite, melanterite, natrojarosite, oligonite, pyrrhotite, rozenite, schwertmannite, siderite, and sideronatrile. Pyrite is relatively abundant in some cases, making up to around 10% of the mineral matter in several samples. The sulphates minerals such as jarosite and others, probably represent oxidation products of pyrite, developed during exposure or storage.

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“…This site is contaminated with high levels of Zn (0.75% mass) and Pb (0.5% mass; Table 2), both of which are toxic to biota (Brim et al 1999;Konopka et al 1999;Sani et al 2001;Lin et al 2003). Although total metal content is important, the mobility, reactivity, and bioavailability of heavy metals are dictated by crystallinity, particle size, mineral phase, and associated chemistry in which these metals reside (Haus et al 2007). …”

Section: Elemental Analysismentioning

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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Analysis of arsenic speciation in mine contaminated lacustrine sediment using selective sequential extraction, HR-ICPMS and TEM

Cited by 21 publications

References 30 publications

Using FlFFF and aTEM to determine trace metal–nanoparticle associations in riverbed sediment

Using FlFFF and aTEM to determine trace metal–nanoparticle associations in riverbed sediment

Coal cleaning residues and Fe-minerals implications

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

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