Effect of sample pretreatment on the fractionation of Fe, Cr, Ni, Cu, Mn, and Zn in acid sulfate soil materials

Salirian R. Claff, Edward D. Burton, Leigh A. Sullivan, Richard T. Bush

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

A sequential extraction procedure was applied to acid sulfate soil materials from a soil profile to investigate the effect of sample pretreatment on the geochemical fractionation of selected metals. The samples were prepared for analysis by oven-drying, sieving and grinding the soil, or were examined as collected in field condition. The soil profile encompassed oxidising conditions near the surface, through to reducing conditions at depth. Six metals (Fe, Cr, Ni, Mn, Cu, and Zn) were measured during the sequential extraction procedure, and their fractionation determined in the oxidised and in the reduced zone. Although cumulative totals (the sum of all steps in the sequential extraction procedure) for the metals extracted from both the field condition and dried/ground samples were similar, some significant differences in fractionation within individual extraction steps were observed. Of particular interest was the redistribution of metals from the sulfide-bearing (pyrite-bound) fraction to the more readily available fractions (i.e. labile and acid-soluble), as a result of oven-drying and grinding. The results indicate that when assessing metal fractionation in acid sulfate soil materials, samples should be analysed in field condition in order to avoid the considerable metal fractionation artifacts that are induced by drying and grinding.

Original languageEnglish
Pages (from-to)156-164
Number of pages9
JournalGeoderma
Volume159
Issue number1-2
DOIs
Publication statusPublished - 2010
Externally publishedYes

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acid sulfate soils
acid sulfate soil
fractionation
pretreatment
metals
metal
grinding
drying
ovens
sampling
soil profiles
soil profile
sieving
sulfides
artifact
material
effect
pyrite
sulfide
acids

Cite this

Claff, Salirian R. ; Burton, Edward D. ; Sullivan, Leigh A. ; Bush, Richard T. / Effect of sample pretreatment on the fractionation of Fe, Cr, Ni, Cu, Mn, and Zn in acid sulfate soil materials. In: Geoderma. 2010 ; Vol. 159, No. 1-2. pp. 156-164.
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Effect of sample pretreatment on the fractionation of Fe, Cr, Ni, Cu, Mn, and Zn in acid sulfate soil materials. / Claff, Salirian R.; Burton, Edward D.; Sullivan, Leigh A.; Bush, Richard T.

In: Geoderma, Vol. 159, No. 1-2, 2010, p. 156-164.

Research output: Contribution to journalArticle

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AU - Burton, Edward D.

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AU - Bush, Richard T.

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