Chemical changes during oxidation of iron monosulfide-rich sediments
J. SmithSchool of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, 2052, Australia; email: jodie.smith@student.unsw.edu.au
Australian Journal of Soil Research 42(6) 659-666 https://doi.org/10.1071/SR03086
Submitted: 16 May 2003 Accepted: 3 May 2004 Published: 17 September 2004
Abstract
Iron monosulfide-rich sediments are commonly found in drains in acid sulfate soil (ASS) areas in eastern Australia. Sulfides represent an important sink for contaminants (including acidity and metals) and play an important role in improving water quality. However, these sediments are prone to oxidation during drain cleaning or drought, releasing acidity and metals into the drainage system, and are a potential environmental hazard in ASS landscapes. Chemical changes during oxidation of iron monosulfide-rich sediments have been studied in an incubation experiment. The effect of lime and mill mud/ash (an alkaline sugar mill byproduct) as neutralising agents has been examined. Oxidation of untreated sediments resulted in decreased pH, the production of acidity, and release of SO4 and metals, including iron, aluminium, and manganese. The large concentration and highly reactive nature of iron monosulfides suggest that the chemical changes observed are mostly a result of iron monosulfide oxidation, although the contribution of pyrite oxidation cannot be totally excluded. Lime appears to be an effective neutralising agent by maintaining pH and low acidity concentrations throughout the incubation experiment. The mill mud/ash initially prevented oxidation but its effectiveness was limited. These findings are important in terms of drain management in ASS environments.
Additional keywords: iron, acidity, neutralisation, metals, iron monosulfides, incubation experiment.
Acknowledgments
This research project was undertaken as part of Project ASS 00.35 funded by the NSW Department of Agriculture Acid Sulfate Soils Program (ASSPRO), and assisted by a Commonwealth of Australia—Australian Postgraduate Award.
Allen HE,
Fu G, Deng B
(1993) Analysis of acid-volatile sulfide (AVS) and simultaneously extracted metals (SEM) for the estimation of potential toxicity in aquatic sediments. Environmental Toxicology and Chemistry 12, 1441–1453.
Aller RC
(1980) Diagenetic processes near the sediment-water interface of Long Island Sound. II. Fe and Mn. ‘Estuarine physics and chemistry: studies in Long Island Sound’. (Ed. B Saltzman)
pp. 351–415. (Academic Press: New York)
ANZECC
(2000) Australian and New Zealand guidelines for fresh and marine water quality. Australian and New Zealand Environment and Conservation Council, Agriculture and Resource Management Council of Australia and New Zealand, National Water Quality Management Strategy Paper No. 4, Canberra, Australia.
APHA (1998).
Arkesteyn GJMW
(1980) Pyrite oxidation in acid sulphate soils: the role of microorganisms. Plant and Soil 54, 119–134.
van den Berg GA,
Loch JPG,
van der Heijdt LM, Zwolsman JJG
(1998) Vertical distribution of acid-volatile sulfide and simultaneously extracted metals in a recent sedimentation area of the river meuse in The Netherlands. Environmental Toxicology and Chemistry 17, 758–763.
Berner RA
(1970) Sedimentary pyrite formation. American Journal of Science 268, 1–23.
Bloomfield C
(1972) The oxidation of iron sulphides in soils in relation to the formation of acid sulphate soils, and of ochre deposits in field drains. Journal of Soil Science 23, 1–16.
van Breemen N
(1973) Soil forming processes in acid sulphate soils. ‘Acid sulphate soils. Proceedings of the 1st International Symposium on Acid Sulphate Soils’. (Ed. H Dost )
pp. 66–130. (ILRI: Wageningen, The Netherlands)
Bush R, Sullivan L
(1999) Pyrite micromorphology in three Australian Holocene sediments. Australian Journal of Soil Research 37, 301–317.
Bush RT, Fyfe D, Sullivan LA
(2002) Distribution and occurrence of monosulfidic black ooze (MBO) in coastal acid sulfate soil landscapes. ‘Abstracts from the 5th International Acid Sulfate Soils Conference’. Tweed Heads, NSW, Australia.
Bush RT, Sullivan LA
(1998) Acid volatile sulfur (Sav-Method 22A). ‘Acid sulfate soil laboratory methods guidelines’. (Eds C Ahern, B Blunden, Y Stone)
pp. 8: 1–4. (ASSMAC: Wollongbar, NSW)
Claff SRC, Sullivan LA, Fyfe D
(2002) Pore water chemistry within monosulfidic black drain oozes (Mbos) in northern New South Wales Australia. ‘5th International Acid Sulfate Soils Conference’. Tweed Heads, NSW, Australia.
Crockford RH, Willett IR
(1995) Drying and oxidation effects on the magnetic properties of sulfidic material during oxidation. Australian Journal of Soil Research 33, 19–29.
Easton C
(1989) The trouble with the Tweed. Fishing World 3, 58–59.
Gurung SR,
Stewart RB,
Gregg PEH, Bolan NS
(2000) An assessment of requirements of neutralising materials of partially oxidised pyritic mine waste rock. Australian Journal of Soil Research 38, 329–344.
| Crossref | GoogleScholarGoogle Scholar |
Jickells TD, Rae JE
(1997) Biogeochemistry of intertidal sediments. ‘Biogeochemistry of intertidal sediments’. (Eds TD Jickells, JE Rae, Y Stone)
pp. 1–15. (Cambridge University Press: Cambridge, UK)
Leonard EN,
Mattson VR,
Benoit DA,
Hoke RA, Ankley GT
(1993) Seasonal variation of acid volatile sulfide concentration in sediment cores from three northeast Minnesota lakes. Hydrobiologia 271, 87–95.
Loeppert RH, Inskeep WP
(1996) Iron. ‘Methods of soil analysis: Part 3—Chemical analysis’. pp. 639–664. (Soil Science Society of America, Inc., American Society of Agronomy, Inc.: Madison, WI)
Morse JW,
Millero FJ,
Cornwell JC, Rickard DT
(1987) The chemistry of the hydrogen sulfide and iron sulfide systems in natural waters. Earth Science Reviews 24, 1–42.
| Crossref | GoogleScholarGoogle Scholar |
Petersen W,
Willer E, Willamowski C
(1997) Remobilization of trace elements from polluted anoxic sediments after resuspension in oxic water. Water, Air, and Soil Pollution 99, 515–522.
| Crossref | GoogleScholarGoogle Scholar |
Robertson G, Creighton G, Porter M, Woodworth J, Stone Y
(1998) Acid sulfate soils drainage guidelines. ‘Acid sulfate soil manual’. (Eds CR Ahern, B Blunden, Y Stone)
(Acid Sulfate Soil Management Advisory Committee: Wollongbar, NSW)
Saulnier I, Mucci A
(2000) Trace metal remobilization following the resuspension of estuarine sediments: Saguenay Fjord, Canada. Applied Geochemistry 15, 203–210.
| Crossref | GoogleScholarGoogle Scholar |
Schippers A, Jørgensen BB
(2002) Biogeochemistry of pyrite and iron sulfide oxidation in marine sediments. Geochimica et Cosmochimica Acta 66, 85–92.
| Crossref | GoogleScholarGoogle Scholar |
Simpson SL,
Apte SC, Batley GE
(1998) Effect of short-term resuspension events on trace metal speciation in polluted anoxic sediments. Environmental Science and Technology 32, 620–625.
| Crossref | GoogleScholarGoogle Scholar |
Sullivan LA, Bush R
(2000) The behaviour of drain sludge in acid sulfate soil areas: Some implications for acidification of waterways and drain maintenance. ‘Proceedings of Workshop on Remediation and Assessment of Broadacre Acid Sulfate Soils’. (Ed. PG Slavich )
pp. 43–48. (ASSMAC: Wollongbar, NSW)
Sullivan LA, Bush RT, Fyfe D
(2002) Acid sulfate soil drain ooze: distribution, behaviour and implications for acidification and deoxygenation of waterways. ‘Acid sulfate soils in Australia and China’. (Eds C Lin, MD Melville, LA Sullivan)
pp. 91–99. (Science Press: Beijing)
Sullivan LA,
Bush RT, McConchie DM
(2000) A modified chromium-reducible sulfur method for reduced inorganic sulfur: optimum reaction time for acid sulfate soil. Australian Journal of Soil Research 38, 729–734.
Toppler N
(2003) Remediation of acid sulfate soil with lime and mill mud-ash. Honours thesis, School of Biological, Earth and Environmental Sciences, University of New South Wales.
Ward NJ,
Sullivan LA, Bush RT
(2002) Sulfide oxidation and acidification of acid sulfate soil materials treated with CaCO3 and seawater-neutralised bauxite refinery residue. Australian Journal of Soil Research 40, 1057–1067.
