Elemental sulfur in drain sediments associated with acid sulfate soils

Edward D. Burton; Richard T. Bush; Leigh A. Sullivan

doi:10.1016/j.apgeochem.2006.02.020

Elemental sulfur in drain sediments associated with acid sulfate soils

Edward D. Burton, Richard T. Bush, Leigh A. Sullivan

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46 Citations (Scopus)

Abstract

This paper reports the abundance of elemental S in drain sediments associated with acid sulfate soils. The sediments exhibited near-neutral pH (5.97-7.27), high concentrations of pore-water Fe²⁺ (1.37-15.9 mM) and abundant oxalate-extractable Fe (up to 4300 μmol g^-1). Maximum acid-volatile sulfide (AVS) concentrations in each sediment profile were high (118-1019 μmol g^-1), with AVS often exceeding pyrite-S. Elemental S occurred at concentrations of 13-396 μmol g^-1, with the higher concentrations exceeding previous concentrations reported for other sedimentary systems. Up to 62% of reduced inorganic S near the sediment/water interface was present as elemental S, due to reaction between AVS and oxidants such as O₂ and Fe(III). Significant correlation (r = 0.74; P < 0.05) between elemental S and oxalate-extractable Fe(III) is indicative of elemental S formation by in situ oxidation of AVS. The results indicate that AVS oxidation in near-surface sediments is dynamic in acidified coastal floodplain drains, causing elemental S to be a quantitatively important intermediate S fraction. Transformations of elemental S may therefore strongly influence water quality in ASS landscapes.

Original language	English
Pages (from-to)	1240-1247
Number of pages	8
Journal	Applied Geochemistry
Volume	21
Issue number	7
DOIs	https://doi.org/10.1016/j.apgeochem.2006.02.020
Publication status	Published - 2006
Externally published	Yes

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10.1016/j.apgeochem.2006.02.020

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title = "Elemental sulfur in drain sediments associated with acid sulfate soils",

abstract = "This paper reports the abundance of elemental S in drain sediments associated with acid sulfate soils. The sediments exhibited near-neutral pH (5.97-7.27), high concentrations of pore-water Fe2+ (1.37-15.9 mM) and abundant oxalate-extractable Fe (up to 4300 μmol g-1). Maximum acid-volatile sulfide (AVS) concentrations in each sediment profile were high (118-1019 μmol g-1), with AVS often exceeding pyrite-S. Elemental S occurred at concentrations of 13-396 μmol g-1, with the higher concentrations exceeding previous concentrations reported for other sedimentary systems. Up to 62% of reduced inorganic S near the sediment/water interface was present as elemental S, due to reaction between AVS and oxidants such as O2 and Fe(III). Significant correlation (r = 0.74; P < 0.05) between elemental S and oxalate-extractable Fe(III) is indicative of elemental S formation by in situ oxidation of AVS. The results indicate that AVS oxidation in near-surface sediments is dynamic in acidified coastal floodplain drains, causing elemental S to be a quantitatively important intermediate S fraction. Transformations of elemental S may therefore strongly influence water quality in ASS landscapes.",

author = "Burton, {Edward D.} and Bush, {Richard T.} and Sullivan, {Leigh A.}",

year = "2006",

doi = "10.1016/j.apgeochem.2006.02.020",

language = "English",

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pages = "1240--1247",

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AU - Burton, Edward D.

AU - Bush, Richard T.

AU - Sullivan, Leigh A.

PY - 2006

Y1 - 2006

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AB - This paper reports the abundance of elemental S in drain sediments associated with acid sulfate soils. The sediments exhibited near-neutral pH (5.97-7.27), high concentrations of pore-water Fe2+ (1.37-15.9 mM) and abundant oxalate-extractable Fe (up to 4300 μmol g-1). Maximum acid-volatile sulfide (AVS) concentrations in each sediment profile were high (118-1019 μmol g-1), with AVS often exceeding pyrite-S. Elemental S occurred at concentrations of 13-396 μmol g-1, with the higher concentrations exceeding previous concentrations reported for other sedimentary systems. Up to 62% of reduced inorganic S near the sediment/water interface was present as elemental S, due to reaction between AVS and oxidants such as O2 and Fe(III). Significant correlation (r = 0.74; P < 0.05) between elemental S and oxalate-extractable Fe(III) is indicative of elemental S formation by in situ oxidation of AVS. The results indicate that AVS oxidation in near-surface sediments is dynamic in acidified coastal floodplain drains, causing elemental S to be a quantitatively important intermediate S fraction. Transformations of elemental S may therefore strongly influence water quality in ASS landscapes.

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DO - 10.1016/j.apgeochem.2006.02.020

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VL - 21

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JO - Applied Geochemistry

JF - Applied Geochemistry

IS - 7

ER -

Elemental sulfur in drain sediments associated with acid sulfate soils

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