Isotopically exchangeable A1 in coastal lowland acid sulfate soils

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dc.contributor.authorYvanes-Giuliani, YAMen_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorRose, Jen_AU
dc.contributor.authorWaite, TDen_AU
dc.contributor.authorCollins, RNen_AU
dc.date.accessioned2021-12-16T03:00:49Zen_AU
dc.date.available2021-12-16T03:00:49Zen_AU
dc.date.issued2016-01-15en_AU
dc.date.statistics2021-11-14en_AU
dc.description.abstractPeriodic discharges of high concentrations of aluminium (Al) causing fish kills and other adverse effects occur worldwide in waterways affected by coastal lowland acid sulfate soils (CLASS). The exchangeability — a metal's ability to readily transfer between the soil solid- and solution-phases — of Al in these soils is therefore of particular importance as it has implications for metal transport, plant availability and toxicity to living organisms. In the present study, the concentrations of isotopically exchangeable Al (E values) were measured in 27 CLASS and compared with common salt extractions (i.e. KCl and CuCl2) used to estimate exchangeable soil pools of Al. E values of Al were high in the soils, ranging from 357 to 3040 mg·kg− 1. Exchangeable concentrations estimated using 1 M KCl were consistently lower than measured E values, although a reasonable correlation was obtained between the two values (E = 1.68 × AlKCl, r2 = 0.66, n = 25). The addition of a 0.2 M CuCl2 extraction step improved the 1:1 agreement between extractable and isotopically exchangeable Al concentrations, but lead to significant mobilisation of non-isotopically exchangeable Al in surficial ‘organic-rich’ CLASS having E values < 1000 mg·kg− 1. It was concluded that currently used (i.e. 1 M KCl) methodology severely underestimates exchangeable Al and total actual acidity values in CLASS and should be corrected by a factor similar to the one determined here. © 2015 Elsevier B.V.en_AU
dc.identifier.citationYvanes-Giuliani, Y. A. M., Fink, D., Rose, J., Waite, T. D., & Collins, R. N. (2016). Isotopically exchangeable A1 in coastal lowland acid sulfate soils. Science of The Total Environment, 542, Part A, 129-135. doi:10.1016/j.scitotenv.2015.10.051en_AU
dc.identifier.issn0048-9697en_AU
dc.identifier.issuePart Aen_AU
dc.identifier.journaltitleScience of The Total Environmenten_AU
dc.identifier.pagination129-135en_AU
dc.identifier.urihttps://doi.org/10.1016/j.scitotenv.2015.10.051en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12488en_AU
dc.identifier.volume542en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectIsotopic exchangeen_AU
dc.subjectAluminiumen_AU
dc.subjectFishesen_AU
dc.subjectToxicityen_AU
dc.subjectSoilsen_AU
dc.subjectCoastal watersen_AU
dc.subjectpH valueen_AU
dc.titleIsotopically exchangeable A1 in coastal lowland acid sulfate soilsen_AU
dc.typeJournal Articleen_AU
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