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Discharge of weathering products from acid sulfate soils after a rainfall event, Tweed River, eastern Australia

MacDonald, Bennett; White, Ian; Astrom, Mats; Keene, Annabelle; Melville, Michael D; Reynolds, Jason K

Description

The oxidation of the iron sulfide, pyrite, in acid sulfate soil floodplains generate substantial acidity and this acid has caused further weathering of the soil profile. The movement of groundwater from these soils is an important geochemical control on surface water quality. The flux of acidified and metal-rich water during a wet season rainfall event has been examined at two study catchments on the Tweed River in eastern Australia. At the sites, 81 kg/ha and 60 kg/ha of oxidisable acidity are...[Show more]

dc.contributor.authorMacDonald, Bennett
dc.contributor.authorWhite, Ian
dc.contributor.authorAstrom, Mats
dc.contributor.authorKeene, Annabelle
dc.contributor.authorMelville, Michael D
dc.contributor.authorReynolds, Jason K
dc.date.accessioned2015-12-07T22:38:37Z
dc.identifier.issn0883-2927
dc.identifier.urihttp://hdl.handle.net/1885/23509
dc.description.abstractThe oxidation of the iron sulfide, pyrite, in acid sulfate soil floodplains generate substantial acidity and this acid has caused further weathering of the soil profile. The movement of groundwater from these soils is an important geochemical control on surface water quality. The flux of acidified and metal-rich water during a wet season rainfall event has been examined at two study catchments on the Tweed River in eastern Australia. At the sites, 81 kg/ha and 60 kg/ha of oxidisable acidity are exported, along with Al, Fe and Zn during the flood event. The main contributors to the acid flux are H+, Fe and Al at the first site and whilst Fe and Al are present in the drainage waters at the second site, the main contributor is likely to be H+. The different flux characteristics at the sites may be caused by different surface soil hydraulic conductivities and oxidation history. Crown
dc.publisherPergamon Press
dc.sourceApplied Geochemistry
dc.subjectKeywords: Floods; Pyrites; Rain; Rivers; Weathering; Drainage waters; Metal-rich water; Substantial acidity; Surface soil hydraulic conductivities; Soils; acid sulfate soil; acidity; hydraulic conductivity; oxidation; pyrite; rainfall; surface water; water quality;
dc.titleDischarge of weathering products from acid sulfate soils after a rainfall event, Tweed River, eastern Australia
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume22
dc.date.issued2007
local.identifier.absfor040603 - Hydrogeology
local.identifier.absfor040202 - Inorganic Geochemistry
local.identifier.ariespublicationU4279067xPUB27
local.type.statusPublished Version
local.contributor.affiliationMacDonald, Bennett, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationWhite, Ian, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationAstrom, Mats, Kalmar University
local.contributor.affiliationKeene, Annabelle, Southern Cross University
local.contributor.affiliationMelville, Michael D, University of New South Wales
local.contributor.affiliationReynolds, Jason K, University of New South Wales
local.description.embargo2037-12-31
local.bibliographicCitation.issue12
local.bibliographicCitation.startpage2695
local.bibliographicCitation.lastpage2705
local.identifier.doi10.1016/j.apgeochem.2007.07.004
dc.date.updated2015-12-07T10:39:53Z
local.identifier.scopusID2-s2.0-36148985636
CollectionsANU Research Publications

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