Testing readsorption of trace elements during partial chemical extractions of bottom sediments

Belzile, Nelson; Lecomte, P.; Tessier, André

doi:10.1021/es00066a014

Cited by 206 publications

(74 citation statements)

References 27 publications

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“…A similar method has been used for collecting freshwater sediments on Teflon sheets (Belzile et al 1989). Before placement, the glass slides were washed with detergent, acid washed two times with 10% HNO 3 (glass distilled, GFS Chemicals) for 24 h, and rinsed with distilled, deionized water (dd H 2 O).…”

Section: Methodsmentioning

confidence: 99%

Lead binding to metal oxide and organic phases of natural aquatic biofilms

Nelson

Lion

Shuler

et al. 1999

Limnology & Oceanography

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The role of the composition of surface-coating materials in controlling trace metal adsorption in aquatic environments was investigated using natural biofilms that developed on glass slides in three New York State lakes and a water-supply well. Adsorption isotherms were obtained for Pb binding to each of the biofilms in solutions with defined Pb speciation at 25ЊC and pH 6.0, with Pb concentrations ranging from 0.2 to 2.0 M. Adsorption isotherms for Pb binding to laboratory-derived metal oxides and surrogate organic materials were determined under the same conditions. These isotherms, combined with characterization of natural biofilm composition, were used to estimate the relative contributions of the organic and metal oxide surface-coating constituents by assuming additivity of adsorption to discrete adsorbing phases. Cells of a diatom (Navicula peliculosa), a green alga (Chlorella vulgaris), the bacterium Leptothrix discophora, and extracellular polymer of the bacterium Burkholdaria cepacia were tested as laboratory analogs for the organic phase of the biofilms. Amorphous Fe oxyhydroxide, ␥Al 2 O 3 , and a laboratoryderived biogenic Mn oxyhydroxide were used as laboratory surrogates for biofilm minerals. The sum total of predicted Pb binding to the defined surrogates accounted for at least 90% of the total observed Pb binding in the three lake biofilms and 60% of that observed for the well biofilms. For the lake biofilms, Pb adsorption to Fe and Mn oxides was significantly greater than that estimated for organic materials. The use of biogenic Mn oxide as a model component resulted in an estimated Pb adsorption to Mn oxyhydroxides in the lake biofilms up to four times greater than that estimated for Fe oxyhydroxide. Estimated Pb binding by Al oxide was negligible for all four biofilms. These results suggest that Fe and biogenic Mn oxides exert the greatest influence on Pb adsorption in oxic freshwater environments at pH 6.0.The cycling of transition metals in aquatic environments is controlled by adsorptive scavenging, which in turn is controlled by the composition of the aqueous phase and the reactive organic and inorganic components at surfaces

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Section: Methodsmentioning

confidence: 99%

Lead binding to metal oxide and organic phases of natural aquatic biofilms

Nelson

Lion

Shuler

et al. 1999

Limnology & Oceanography

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“…In contrast, sequential extraction procedures have been applied to soils and sediments to characterise their respective metal fractions, by selectively targeting and releasing metals bound in certain geochemical phases, such as carbonate, iron and manganese oxide/hydroxide, sulfidic, organic, and silicate [4]. Several problems have been identified with the use of sequential extraction procedures, including non-selectivity and readsorption [5][6][7][8]. Consequently, fractionation of metals is operationally defined in terms of the extraction mechanism used to release the metals rather than in terms of the discrete geochemical phases.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of optimised BCR sequential extraction scheme and acid leaching of elements in the certified reference material NIST 2711

Larner

Seen

Townsend

2006

Analytica Chimica Acta

109

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The optimised BCR sequential extraction procedure and a 4 h 1 mol L −1 HCl partial extraction have been performed on the NIST 2711 reference material for a suite of 12 elements (Cd, Sb, Pb, Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As) using magnetic sector ICP-MS. A pseudo-total aqua regia digest of NIST 2711 has also been undertaken for quality assurance purposes, and comparison of the sum of the four BCR fractions, which included an aqua regia digest on the residue, with the pseudo-total aqua regia digest has been used to assess the accuracy of the BCR partitioning approach. As a result of this work, discrepancies between previous studies about BCR partitioning of elements in NIST 2711 have been discussed and an increase in confidence about the use of BCR partitioning scheme on seven elements (Cd, Pb, Al, Mn, Fe, Cu, Zn) in this standard material has been obtained. On the other hand, BCR partitioning for Sb, Cr, Co, Ni and As has been provided for the first time. Partial extraction results are also reported for the same 12 elements analysed by the optimised BCR procedure, with the partial extraction results exhibiting a strong correlation with the sum of the three labile steps of the BCR procedure.

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“…The sequential extraction procedure (SEP) is also often used to assess the possible chemical partitioning of trace metals, particularly on the mobility and bioavailability of metals in sediments (Tessier et al, 1979;Belzile et al, 1989;Ryssen et al, 1999;Li et al, 2001). A comparison of SEP and SEM results may provide new insights for interpreting the SEM/AVS measurement.…”

Section: Introductionmentioning

confidence: 99%

Acid volatile sulfide and simultaneously extracted metals in the sediment cores of the Pearl River Estuary, South China

Fang

Zhang

2005

Ecotoxicology and Environmental Safety

103

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The acid-volatile sulfide (AVS), simultaneously extracted metals (SEM), total metals, and chemical partitioning in the sediment cores of the Pearl River Estuary (PRE) were studied. The concentrations of total metals, AVS, and SEM in the sediment cores were generally low in the river outlet area, increased along the seaward direction, and decreased again at the seaward boundary of the estuary. The amounts of AVS were generally greater in deeper sediments than in surface sediments. SEM/AVS was 41 in the surface sediments and in the river outlet cores. The ratio was o1 in the sediments down the profiles, suggesting that AVS might play a major role in binding heavy metals in the deep sediments of the PRE. The SEM may contain different chemical forms of trace metals in the sediments, depending on the metal reaction with 1 M cold HCl in the AVS procedure compared with the results of the sequential chemical extraction. The SEM/AVS ratio prediction may overestimate trace metal availability even in the sediments with high AVS concentrations. r 2004 Elsevier Inc. All rights reserved.

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Testing readsorption of trace elements during partial chemical extractions of bottom sediments

Cited by 206 publications

References 27 publications

Lead binding to metal oxide and organic phases of natural aquatic biofilms

Lead binding to metal oxide and organic phases of natural aquatic biofilms

Comparative study of optimised BCR sequential extraction scheme and acid leaching of elements in the certified reference material NIST 2711

Acid volatile sulfide and simultaneously extracted metals in the sediment cores of the Pearl River Estuary, South China

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