Recent history of sediment metal contamination in Lake Macquarie, Australia, and an assessment of ash handling procedure effectiveness in mitigating metal contamination from coal-fired power stations

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dc.contributor.authorSchneider, Len_AU
dc.contributor.authorMaher, Wen_AU
dc.contributor.authorPotts, Jen_AU
dc.contributor.authorGruber, Ben_AU
dc.contributor.authorBatley, GEen_AU
dc.contributor.authorTaylor, Aen_AU
dc.contributor.authorChariton, AAen_AU
dc.contributor.authorKrikowa, Fen_AU
dc.contributor.authorZawadzki, Aen_AU
dc.contributor.authorHeijnis, Hen_AU
dc.date.accessioned2016-10-25T23:51:40Zen_AU
dc.date.available2016-10-25T23:51:40Zen_AU
dc.date.issued2014-08-15en_AU
dc.date.statistics2016-10-26en_AU
dc.description.abstractThis study assessed historical changes in metal concentrations in sediments of southern Lake Macquarie resulting from the activities of coal-fired power stations, using a multi-proxy approach which combines 210Pb, 137Cs and metal concentrations in sediment cores. Metal concentrations in the lake were on average, Zn: 67 mg/kg, Cu: 15 mg/kg, As: 8 mg/kg, Se: 2 mg/kg, Cd: 1.5 mg/kg, Pb: 8 mg/kg with a maximum of Zn: 280 mg/kg, Cu: 80 mg/kg, As: 21 mg/kg, Se: 5 mg/kg, Cd: 4 mg/kg, Pb: 48 mg/kg. The ratios of measured concentrations in sediment cores to their sediment guidelines were Cd 1.8, As 1.0, Cu 0.5, Pb 0.2 and Zn 0.2, with the highest concern being for cadmium. Of special interest was assessment of the effects of changes in ash handling procedures by the Vales Point power station on the metal concentrations in the sediments. Comparing sediment layers before and after ash handling procedures were implemented, zinc concentrations have decreased 10%, arsenic 37%, selenium 20%, cadmium 38% and lead 14%. An analysis of contaminant depth profiles showed that, after implementation of new ash handling procedures in 1995, selenium and cadmium, the main contaminants in Australian black coal had decreased significantly in this estuary. © 2014, Elsevier B.V.en_AU
dc.identifier.citationSchneider, L., Maher, W., Potts, J., Gruber, B., Batley, G., Taylor, A., Chariton, A., Krikowa, F., Zawadski, A., & Heijnis, H. (2014). Recent history of sediment metal contamination in Lake Macquarie, Australia, and an assessment of ash handling procedure effectiveness in mitigating metal contamination from coal-fired power stations. Science of the Total Environment, 490, 659-670. doi:10.1016/j.scitotenv.2014.04.055en_AU
dc.identifier.govdoc7423en_AU
dc.identifier.issn0048-9697en_AU
dc.identifier.journaltitleScience of the Total Environmenten_AU
dc.identifier.pagination659-670en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.scitotenv.2014.04.055en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7901en_AU
dc.identifier.volume490en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectCoalen_AU
dc.subjectPower systemsen_AU
dc.subjectSedimentsen_AU
dc.subjectMetalsen_AU
dc.subjectSeleniumen_AU
dc.subjectAshesen_AU
dc.titleRecent history of sediment metal contamination in Lake Macquarie, Australia, and an assessment of ash handling procedure effectiveness in mitigating metal contamination from coal-fired power stationsen_AU
dc.typeJournal Articleen_AU
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