Reduced inorganic sulfur speciation in drain sediments from acid sulfate soil landscapes

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

doi:10.1021/es0516763

Reduced inorganic sulfur speciation in drain sediments from acid sulfate soil landscapes

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

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

We examined processes regulating reduced inorganic sulfur (RIS) speciation in drain sediments from coastal acid sulfate soil (ASS) landscapes. Pore water sulfide was undetectable or present at low levels (0.6-18.8 μM), consistent with FeS_(s) precipitation in the presence of high concentrations of Fe²⁺ (generally >2 mM). Acid-volatile sulfide (AVS), with concentrations up to 1019 μmol g^-1, comprised a major proportion of RIS. The AVS to pyrite-S ratios were up to 2.6 in sediment profiles containing abundant reactive Fe (up to ∼4000 μmol g^-1). Such high AVS:pyrite-S ratios are indicative of inefficient conversion of FeS _(s) to pyrite. This may be due to low pore water sulfide levels causing slow rates of pyrite formation via the polysulfide and H₂S oxidation pathways. Overall, RIS speciation in ASS-associated drain sediments is unique and is largely regulated by abundant reactive Fe.

Original language	English
Pages (from-to)	888-893
Number of pages	6
Journal	Environmental Science and Technology
Volume	40
Issue number	3
DOIs	https://doi.org/10.1021/es0516763
Publication status	Published - 2006
Externally published	Yes

Access to Document

10.1021/es0516763

Cite this

@article{91fb55597fdb4f8882529dab90b32529,

title = "Reduced inorganic sulfur speciation in drain sediments from acid sulfate soil landscapes",

abstract = "We examined processes regulating reduced inorganic sulfur (RIS) speciation in drain sediments from coastal acid sulfate soil (ASS) landscapes. Pore water sulfide was undetectable or present at low levels (0.6-18.8 μM), consistent with FeS(s) precipitation in the presence of high concentrations of Fe2+ (generally >2 mM). Acid-volatile sulfide (AVS), with concentrations up to 1019 μmol g-1, comprised a major proportion of RIS. The AVS to pyrite-S ratios were up to 2.6 in sediment profiles containing abundant reactive Fe (up to ∼4000 μmol g-1). Such high AVS:pyrite-S ratios are indicative of inefficient conversion of FeS (s) to pyrite. This may be due to low pore water sulfide levels causing slow rates of pyrite formation via the polysulfide and H2S oxidation pathways. Overall, RIS speciation in ASS-associated drain sediments is unique and is largely regulated by abundant reactive Fe.",

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

year = "2006",

doi = "10.1021/es0516763",

language = "English",

volume = "40",

pages = "888--893",

journal = "Environmental Science and Technology",

issn = "0013-936X",

publisher = "American Chemical Society",

number = "3",

}

TY - JOUR

T1 - Reduced inorganic sulfur speciation in drain sediments from acid sulfate soil landscapes

AU - Burton, Edward D.

AU - Bush, Richard T.

AU - Sullivan, Leigh A.

PY - 2006

Y1 - 2006

N2 - We examined processes regulating reduced inorganic sulfur (RIS) speciation in drain sediments from coastal acid sulfate soil (ASS) landscapes. Pore water sulfide was undetectable or present at low levels (0.6-18.8 μM), consistent with FeS(s) precipitation in the presence of high concentrations of Fe2+ (generally >2 mM). Acid-volatile sulfide (AVS), with concentrations up to 1019 μmol g-1, comprised a major proportion of RIS. The AVS to pyrite-S ratios were up to 2.6 in sediment profiles containing abundant reactive Fe (up to ∼4000 μmol g-1). Such high AVS:pyrite-S ratios are indicative of inefficient conversion of FeS (s) to pyrite. This may be due to low pore water sulfide levels causing slow rates of pyrite formation via the polysulfide and H2S oxidation pathways. Overall, RIS speciation in ASS-associated drain sediments is unique and is largely regulated by abundant reactive Fe.

AB - We examined processes regulating reduced inorganic sulfur (RIS) speciation in drain sediments from coastal acid sulfate soil (ASS) landscapes. Pore water sulfide was undetectable or present at low levels (0.6-18.8 μM), consistent with FeS(s) precipitation in the presence of high concentrations of Fe2+ (generally >2 mM). Acid-volatile sulfide (AVS), with concentrations up to 1019 μmol g-1, comprised a major proportion of RIS. The AVS to pyrite-S ratios were up to 2.6 in sediment profiles containing abundant reactive Fe (up to ∼4000 μmol g-1). Such high AVS:pyrite-S ratios are indicative of inefficient conversion of FeS (s) to pyrite. This may be due to low pore water sulfide levels causing slow rates of pyrite formation via the polysulfide and H2S oxidation pathways. Overall, RIS speciation in ASS-associated drain sediments is unique and is largely regulated by abundant reactive Fe.

UR - http://www.scopus.com/inward/record.url?scp=32344451017&partnerID=8YFLogxK

U2 - 10.1021/es0516763

DO - 10.1021/es0516763

M3 - Article

C2 - 16509333

AN - SCOPUS:32344451017

SN - 0013-936X

VL - 40

SP - 888

EP - 893

JO - Environmental Science and Technology

JF - Environmental Science and Technology

IS - 3

ER -

Reduced inorganic sulfur speciation in drain sediments from acid sulfate soil landscapes

Abstract

Access to Document

Other files and links

Fingerprint

Cite this