Partitioning of metals in a degraded acid sulfate soil landscape

Influence of tidal re-inundation

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

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The oxidation and acidification of sulfidic soil materials results in the re-partitioning of metals, generally to more mobile forms. In this study, we examine the partitioning of Fe, Cr, Cu, Mn, Ni and Zn in the acidified surface soil (0-0.1. m) and the unoxidised sub-soil materials (1.3-1.5. m) of an acid sulfate soil landscape. Metal partitioning at this acidic site was then compared to an adjacent site that was previously acidified, but has since been remediated by tidal re-inundation. Differences in metal partitioning were determined using an optimised six-step sequential extraction procedure which targets the " labile" , " acid-soluble" , " organic" , " crystalline oxide" , " pyritic" and " residual" fractions. The surficial soil materials of the acidic site had experienced considerable losses of Cr, Cu, Mn and Ni compared to the underlying parent material due to oxidation and acidification, yet only minor losses of Fe and Zn. In general, the metals most depleted from the acidified surface soil materials exhibited the greatest sequestration in the surface soil materials of the tidally remediated site. An exception to this was iron, which accumulated to highly elevated concentrations in the surficial soil materials of the tidally remediated site. The " acid-soluble" , " organic" and " pyritic" fractions displayed the greatest increase in metals following tidal remediation. This study demonstrates that prolonged tidal re-inundation of severely acidified acid sulfate soil landscapes leads to the immobilisation of trace metals through the surficial accumulation of iron oxides, organic material and pyrite.

Original languageEnglish
Pages (from-to)1220-1226
Number of pages7
JournalChemosphere
Volume85
Issue number8
DOIs
Publication statusPublished - 2011
Externally publishedYes

Fingerprint

acid sulfate soil
Sulfates
Soil
partitioning
Metals
Soils
Acids
metal
soil surface
organic acid
Acidification
acidification
Organic acids
oxidation
soil
parent material
material
Oxidation
subsoil
iron oxide

Cite this

Claff, Salirian R. ; Sullivan, Leigh A. ; Burton, Edward D. ; Bush, Richard T. ; Johnston, Scott G. / Partitioning of metals in a degraded acid sulfate soil landscape : Influence of tidal re-inundation. In: Chemosphere. 2011 ; Vol. 85, No. 8. pp. 1220-1226.
@article{ef02ac589e07478ca10f7ef775d2199e,
title = "Partitioning of metals in a degraded acid sulfate soil landscape: Influence of tidal re-inundation",
abstract = "The oxidation and acidification of sulfidic soil materials results in the re-partitioning of metals, generally to more mobile forms. In this study, we examine the partitioning of Fe, Cr, Cu, Mn, Ni and Zn in the acidified surface soil (0-0.1. m) and the unoxidised sub-soil materials (1.3-1.5. m) of an acid sulfate soil landscape. Metal partitioning at this acidic site was then compared to an adjacent site that was previously acidified, but has since been remediated by tidal re-inundation. Differences in metal partitioning were determined using an optimised six-step sequential extraction procedure which targets the {"} labile{"} , {"} acid-soluble{"} , {"} organic{"} , {"} crystalline oxide{"} , {"} pyritic{"} and {"} residual{"} fractions. The surficial soil materials of the acidic site had experienced considerable losses of Cr, Cu, Mn and Ni compared to the underlying parent material due to oxidation and acidification, yet only minor losses of Fe and Zn. In general, the metals most depleted from the acidified surface soil materials exhibited the greatest sequestration in the surface soil materials of the tidally remediated site. An exception to this was iron, which accumulated to highly elevated concentrations in the surficial soil materials of the tidally remediated site. The {"} acid-soluble{"} , {"} organic{"} and {"} pyritic{"} fractions displayed the greatest increase in metals following tidal remediation. This study demonstrates that prolonged tidal re-inundation of severely acidified acid sulfate soil landscapes leads to the immobilisation of trace metals through the surficial accumulation of iron oxides, organic material and pyrite.",
keywords = "Acidic soil, Metal partitioning, Sulfidic soil, Tidal inundation",
author = "Claff, {Salirian R.} and Sullivan, {Leigh A.} and Burton, {Edward D.} and Bush, {Richard T.} and Johnston, {Scott G.}",
year = "2011",
doi = "10.1016/j.chemosphere.2011.07.013",
language = "English",
volume = "85",
pages = "1220--1226",
journal = "Chemosphere - Global Change Science",
issn = "0045-6535",
publisher = "Elsevier Limited",
number = "8",

}

Partitioning of metals in a degraded acid sulfate soil landscape : Influence of tidal re-inundation. / Claff, Salirian R.; Sullivan, Leigh A.; Burton, Edward D.; Bush, Richard T.; Johnston, Scott G.

In: Chemosphere, Vol. 85, No. 8, 2011, p. 1220-1226.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Partitioning of metals in a degraded acid sulfate soil landscape

T2 - Influence of tidal re-inundation

AU - Claff, Salirian R.

AU - Sullivan, Leigh A.

AU - Burton, Edward D.

AU - Bush, Richard T.

AU - Johnston, Scott G.

PY - 2011

Y1 - 2011

N2 - The oxidation and acidification of sulfidic soil materials results in the re-partitioning of metals, generally to more mobile forms. In this study, we examine the partitioning of Fe, Cr, Cu, Mn, Ni and Zn in the acidified surface soil (0-0.1. m) and the unoxidised sub-soil materials (1.3-1.5. m) of an acid sulfate soil landscape. Metal partitioning at this acidic site was then compared to an adjacent site that was previously acidified, but has since been remediated by tidal re-inundation. Differences in metal partitioning were determined using an optimised six-step sequential extraction procedure which targets the " labile" , " acid-soluble" , " organic" , " crystalline oxide" , " pyritic" and " residual" fractions. The surficial soil materials of the acidic site had experienced considerable losses of Cr, Cu, Mn and Ni compared to the underlying parent material due to oxidation and acidification, yet only minor losses of Fe and Zn. In general, the metals most depleted from the acidified surface soil materials exhibited the greatest sequestration in the surface soil materials of the tidally remediated site. An exception to this was iron, which accumulated to highly elevated concentrations in the surficial soil materials of the tidally remediated site. The " acid-soluble" , " organic" and " pyritic" fractions displayed the greatest increase in metals following tidal remediation. This study demonstrates that prolonged tidal re-inundation of severely acidified acid sulfate soil landscapes leads to the immobilisation of trace metals through the surficial accumulation of iron oxides, organic material and pyrite.

AB - The oxidation and acidification of sulfidic soil materials results in the re-partitioning of metals, generally to more mobile forms. In this study, we examine the partitioning of Fe, Cr, Cu, Mn, Ni and Zn in the acidified surface soil (0-0.1. m) and the unoxidised sub-soil materials (1.3-1.5. m) of an acid sulfate soil landscape. Metal partitioning at this acidic site was then compared to an adjacent site that was previously acidified, but has since been remediated by tidal re-inundation. Differences in metal partitioning were determined using an optimised six-step sequential extraction procedure which targets the " labile" , " acid-soluble" , " organic" , " crystalline oxide" , " pyritic" and " residual" fractions. The surficial soil materials of the acidic site had experienced considerable losses of Cr, Cu, Mn and Ni compared to the underlying parent material due to oxidation and acidification, yet only minor losses of Fe and Zn. In general, the metals most depleted from the acidified surface soil materials exhibited the greatest sequestration in the surface soil materials of the tidally remediated site. An exception to this was iron, which accumulated to highly elevated concentrations in the surficial soil materials of the tidally remediated site. The " acid-soluble" , " organic" and " pyritic" fractions displayed the greatest increase in metals following tidal remediation. This study demonstrates that prolonged tidal re-inundation of severely acidified acid sulfate soil landscapes leads to the immobilisation of trace metals through the surficial accumulation of iron oxides, organic material and pyrite.

KW - Acidic soil

KW - Metal partitioning

KW - Sulfidic soil

KW - Tidal inundation

UR - http://www.scopus.com/inward/record.url?scp=82455199253&partnerID=8YFLogxK

U2 - 10.1016/j.chemosphere.2011.07.013

DO - 10.1016/j.chemosphere.2011.07.013

M3 - Article

VL - 85

SP - 1220

EP - 1226

JO - Chemosphere - Global Change Science

JF - Chemosphere - Global Change Science

SN - 0045-6535

IS - 8

ER -