The selectivity of a sequential extraction procedure for the determination of iron oxyhydroxides andiron sulfides in lake sediments

Shannon, R. D.; White, Jeffrey R.

doi:10.1007/bf00000807

Cited by 52 publications

(24 citation statements)

References 24 publications

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“…This increase is mostly explained by the dehydratation and conversion of iron oxyhydroxides to more crystalline forms, not soluble in acidified NH 2 OH (Chao, 1972;Shuman, 1982;Chao and Liyi Zhou, 1983;Tipping et al, 1985;Shannon and White, 1991). For Cu, it is observed that the large organic pool was mainly shifted into the residual fraction.…”

Section: Residual Fractionmentioning

confidence: 98%

“…Nonselectivity of the reagents and trace element redistributions among phases during fractionation are the main problems reported (Rendell and Batley, 1980;Tipping et al, 1985;Belzile et al, 1989;Bermond and Sommer, 1989;Calvet et al, 1990;Shannon and White, 1991;Bermond, 1992;Bermond and Eustache, 1993;Förstner, 1993;Xiao-Quan and Bin, 1993). Despite all the restrictions, sequential fractionation procedures have proved to be useful in the field of environmental analytical chemistry (Tessier and Campbell, 1991).…”

Section: Introductionmentioning

confidence: 99%

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Impact of single reagent extraction using NH4OAc-EDTA on the solid phase distribution of metals in a contaminated dredged sediment

Tack

Verloo

1996

Science of The Total Environment

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The solid phase distribution of metals in a contaminated dredged sediment as affected by a single reagent extraction (0.5 mol/L NH 4 OAc + 0.02 mol/L EDTA) was studied. A sediment was dried and portions were heated at 250°C and 450°C. From each treatment, a portion was extracted with NH 4 OAc-EDTA. Both the extracted and the unextracted portions were then subjected to a sequential fractionation.NH 4 OAc-EDTA extraction decreased both the acid extractable and the reducible fractions. The oxidizable and residual fractions were not significantly affected. Larger portions of the acid extractable and reducible fractions were extracted with NH 4 OAc-EDTA when the sediment was previously heated at 250°C. After heating the sediment at 450°C the NH 4 OAc-EDTA-extractable portions decreased.Fractionation procedures can provide reliable information on the chemical associations of pollutants in sediments. To estimate short and medium term metal availability, single reagent leaching tests appear more appropriate.

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Section: Residual Fractionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Impact of single reagent extraction using NH4OAc-EDTA on the solid phase distribution of metals in a contaminated dredged sediment

Tack

Verloo

1996

Science of The Total Environment

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“…For example, in addition to their targeted components, Fractions f2 and f3a may also extract metals associated with organic material adsorbed on particle surfaces, or surface sites on paniculate organic matter and metal oxides. Acid volatile sulphide (AVS), and metals associated with it, is reported to be partially extracted into Fraction f3 (Rapin et al 1986;Shannon & White 1991) instead of f4, and possibly even in Fraction f2 (Wallmann et al 1993). In addition, there is some evidence that solubilised metals may re-adsorb onto other components during extraction (Kheboian & Bauer 1987;Rendell et al 1980) especially Cu (Schriner 1994).…”

Section: Methodsmentioning

confidence: 99%

Trace metal partitioning in bioturbated, contaminated, surficial sediments from Mangere Inlet, New Zealand

Williamson

Mol‐Krijnen

Dam

1995

New Zealand Journal of Marine and Freshwater Research

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Diagenesis and its effects on the partitioning of trace metals was examined in intertidal muddy sediments in polluted Mangere Inlet, Manukau Harbour, New Zealand. Two cores were sectioned down to 26 cm, and analysed for compounds of Fe, Mn, S, and organic matter. Trace metals were analysed by sequential extraction (nonresidual metals), 0.5M HCl, and XRF (total metals). The sediments were bioturbated, with strong mottling of sediment colour in both cores and intact macropores in one core. Bioturbation appeared to affect sediment chemistry and to cause differences between the cores. There were changes in trace metal partitioning in the non-residual phases with depth, but the changes were relatively small, in line with the changes in major sediment phases. None of the trace metals showed an increase in the lithogenic fraction with depth and we concluded that immobilisation of trace metals by incorporation into residual phases is not an important mechanism in the surface sediments.

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“…This process was proved to be a source of analytical bias in samples even accidentally exposed to free oxygen (Hjorth, 2004). Shannon and White (1991) also observed limited selectivity of the method of Tessier et al (1979) for iron sulfides in aerobically handled samples. Owing to its amorphous structure, FeS can be removed from the solid sediments during extraction steps I to III.…”

Section: Ironmentioning

confidence: 99%

“…Owing to its amorphous structure, FeS can be removed from the solid sediments during extraction steps I to III. Pyrite is reported to be more resistant to oxidation and is most effectively dissolved by a mixture of HNO 3 and H 2 O 2 (step IV of the extraction) (Shannon and White, 1991).…”

Section: Ironmentioning

confidence: 99%

Fractionation of metals in the Sa1/2 sediment core from Lake Sarbsko (northern Poland) and its palaeolimnological implications

Woszczyk

Spychalski

2013

Chemical Speciation & Bioavailability

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This article documents and interprets stratigraphical changes in fractionation of Fe, Mn, Mg, K, Pb, Cu and Zn in the Sa1/2 sediment core from a coastal freshwater lake, Lake Sarbsko (northern Poland). The elements were sequentially extracted from the samples to distinguish five geochemical fractions: exchangeable, acid-extractable, reducible, oxidisable and residual. The analyses revealed substantial variations in geochemical partitioning of the elements and showed no correlation between the fractionation patterns and lithology of the sediments. In the sediments of Lake Sarbsko, iron is mainly bound to sulfides. Potassium occurs in its residual form. Magnesium and zinc are associated with carbonates and aluminosilicates, while copper occurs in compounds with organic matter and sulfides. Lead is found in connection with aluminosilicates and, to a lesser extent, with sulfides and organic matter. Manganese is partitioned between the oxidisable, acid-extractable, and exchangeable fractions. Heavy metals and potassium display the overall tendency to reduce the contents of their residual forms towards the top of the depositional sequence. Fe, Mn, Mg and Zn were found to be the most susceptible to post-sedimentary mobilisation.

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The selectivity of a sequential extraction procedure for the determination of iron oxyhydroxides andiron sulfides in lake sediments

Cited by 52 publications

References 24 publications

Impact of single reagent extraction using NH4OAc-EDTA on the solid phase distribution of metals in a contaminated dredged sediment

Impact of single reagent extraction using NH4OAc-EDTA on the solid phase distribution of metals in a contaminated dredged sediment

Trace metal partitioning in bioturbated, contaminated, surficial sediments from Mangere Inlet, New Zealand

Fractionation of metals in the Sa1/2 sediment core from Lake Sarbsko (northern Poland) and its palaeolimnological implications

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