Competition between iron- and carbon-based colloidal carriers for trace metals in a freshwater assessed using flow field-flow fractionation coupled to ICPMS

Lyvén, Benny; Hassellöv, Martin; Turner, David R.; Haraldsson, Conny; Andersson, Karen

doi:10.1016/s0016-7037(03)00087-5

Cited by 209 publications

(185 citation statements)

References 35 publications

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“…Colloids, defined as solid material less than 1 µm in size, have been given much attention recently as a major player in trace metal transport. [5][6][7][8][9][10] Because of the small size of colloids, they are more readily transported longer distances than larger materials but may quickly aggregate to larger units and are less easily re-suspended than larger particles (e.g. Hjulstrøm curve), [11] hence transport and distribution processes are multifactorial and complex.…”

Section: Introductionmentioning

confidence: 99%

“…This combination of FlFFF and aTEM, therefore, gives a comprehensive picture of trace metal-nanoparticle associations. While various studies have utilised FFF coupled to light scattering, [34][35][36][37][38][39][40][41][42][43][44][45] ICPMS, [7,[46][47][48][49][50][51][52] TEM [33,[53][54][55] or some combination thereof, many of these studies focussed on organic matter, synthetic nanoparticles, or uncontaminated river water. This study uses the above mentioned techniques to provide a first look at the direct associations between mineral nanoparticles and toxic trace metals in contaminated sediment.…”

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%

Section: Introductionmentioning

confidence: 99%

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

et al. 2010

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“…1) and other elements have been determined by Field Flow Fractionation coupled to Inductively Coupled Plasma Mass Spectrometry (FFF-ICPMS) in a number of studies, ranging from river water (Dahlqvist et al, 2007;Lyvén et al, 2003), and surface water from the brackish Bothnian Sea (Salinity ∼4.7) through the Baltic Proper (this study, Salinity ≥7) and the Skagerrak coast (Salinity >20) at the North Sea boundary (Stolpe and Hassellöv, 2010). In river water, colloid-associated iron is mainly distributed between 0.5-4 nm macromolecules of humic-type fluorescent organic matter (presumed fulvic acid) and 3-50 nm iron rich colloids (presumed Fe(III)-hydroxide/oxyhydroxide; Hassellöv and von der Kammer, 2008).…”

Section: Introductionmentioning

confidence: 99%

Fractionation of iron species and iron isotopes in the Baltic Sea euphotic zone

Gelting

Breitbarth²,

Stolpe³

et al. 2010

Biogeosciences

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“…The primary requirements for sampling and fractionation of colloids are reliability, lack of bias, and minimum perturbation of their native forms (Baalousha et al 2005). A wide variety of techniques have been applied to fractionate colloids, including split-thin flow fractionation (SPLIFF) (Contado et al 2003), flow field-flow fractionation (FIFFF) (Benedetti et al 2002;Lyvén et al 2003;Baalousha et al 2005Baalousha et al , 2006, sedimentation field-flow fractionation (SdFFF) (Ranville et al 1999;Ran et al 2000), and cross-flow filtration (CFF, also called tangential flow filtration (TFF)) (Guo et al 2000;Hoffmann et al 2000;Wilding et al 2004;Doucet et al 2004Doucet et al , 2005. Among these fractionation techniques cross-flow filtration has perhaps been the most widely used (Powell et al 1996;Stordal et al 1996;Benoit and Rozan 1999;Guéguen et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Size fractionation and characterization of nanocolloidal particles in soils

Zhi-yun

Luo

et al. 2008

Environ Geochem Health

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A protocol was developed to fractionate soil particles down to the nanocolloid scale by combining sieving, sedimentation, centrifugation, and cross-flow filtration (CFF). The validity of the method and the performance of the CFF system were tested by characterizing fractions using laser granulometry, electron microscopy, and chemical analysis. The 0.1-lm-pore-size membrane CFF system effectively retained nanocolloids (\0.1 lm) as shown by laser granulometry and observed directly by transmission electron microscopy. However, environmental scanning electron microscopy images of freeze-dried colloids were very different from their TEM counterparts, suggesting that sample preparation influenced microscopy imaging. Chemical analysis of Cu, Cd, and organic carbon in each fraction showed that the concentrations of these components increased as particle size decreased, indicating colloids and nanocolloids play an important role in retaining trace metals. Particle-size fractionation combined with chemical analysis and electron microscopy can provide insight into the nature and properties of nanocolloids in soil.

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Competition between iron- and carbon-based colloidal carriers for trace metals in a freshwater assessed using flow field-flow fractionation coupled to ICPMS

Cited by 209 publications

References 35 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

Fractionation of iron species and iron isotopes in the Baltic Sea euphotic zone

Size fractionation and characterization of nanocolloidal particles in soils

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