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Effectiveness of an Open Limestone Channel in Treating Acid Sulphate Soil Drainage

Green, Ros; Waite, T; Melville, Michael D; MacDonald, Bennett

Description

An open limestone channel (OLC) was constructed within an existing drain to treat the acidic and metal-rich drainage waters generated from an acid sulfate soil (ASS) catchment. The OLC was constructed downstream of a catchment pump and it consisted of a series of ponds and limestone sections. The accumulation of sediment over the limestone, preventing contact of limestone with acidic water, was the greatest problem impacting the OLC in its first year of operation. The continuous or sporadic...[Show more]

dc.contributor.authorGreen, Ros
dc.contributor.authorWaite, T
dc.contributor.authorMelville, Michael D
dc.contributor.authorMacDonald, Bennett
dc.date.accessioned2015-12-08T22:30:27Z
dc.identifier.issn0049-6979
dc.identifier.urihttp://hdl.handle.net/1885/34448
dc.description.abstractAn open limestone channel (OLC) was constructed within an existing drain to treat the acidic and metal-rich drainage waters generated from an acid sulfate soil (ASS) catchment. The OLC was constructed downstream of a catchment pump and it consisted of a series of ponds and limestone sections. The accumulation of sediment over the limestone, preventing contact of limestone with acidic water, was the greatest problem impacting the OLC in its first year of operation. The continuous or sporadic operation of the catchment pump (at 120 l/s) was not sufficient to flush sediment from the limestone. The accumulation of large amounts of sediment onto the limestone reduced the amount of alkalinity and calcium released into solution. However, if the sediment is removed by agitating the limestone then an equivalent or greater amount of alkalinity may be added to solution and more metals removed from solution compared to fresh limestone. The coating on the limestone had a high concentration of manganese oxides in addition to slightly lower concentrations of aluminium and iron. Removal of these metals from the water was due to the increase in pH produced by limestone dissolution in addition to sorption reactions of the existing coating which had natural microbial activity.
dc.publisherKluwer Academic Publishers
dc.sourceWater, Air and Soil Pollution
dc.subjectKeywords: Acid sulfate soils; Limestone surface mineralogy; Open limestone channel; Passive acidity treatment; Catchments; Concentration (process); Drainage; Limestone; Soil surveys; aluminum; iron; limestone; manganese oxide; sulfate; Catchments; Concentration (pr Acid sulfate soils; Changes in limestone surface mineralogy; Open limestone channel; Passive acidity treatment
dc.titleEffectiveness of an Open Limestone Channel in Treating Acid Sulphate Soil Drainage
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume191
dc.date.issued2008
local.identifier.absfor040608 - Surfacewater Hydrology
local.identifier.absfor079901 - Agricultural Hydrology (Drainage, Flooding, Irrigation, Quality, etc.)
local.identifier.ariespublicationU4279067xPUB113
local.type.statusPublished Version
local.contributor.affiliationGreen, Ros, Rio Tinto Iron Ore
local.contributor.affiliationWaite, T, University of New South Wales
local.contributor.affiliationMelville, Michael D, University of New South Wales
local.contributor.affiliationMacDonald, Bennett, College of Medicine, Biology and Environment, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage293
local.bibliographicCitation.lastpage304
local.identifier.doi10.1007/s11270-008-9625-z
dc.date.updated2015-12-08T09:28:59Z
local.identifier.scopusID2-s2.0-44149125533
CollectionsANU Research Publications

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