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

Bill MAHER, Jaimie Potts, Bernd GRUBER, Graeme Batley, Anne TAYLOR, Anthony Chariton, Atun Zawadzki, Henk Heijnis

    Research output: Contribution to journalArticle

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    Abstract

    This 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.
    Original languageEnglish
    Pages (from-to)659-670
    Number of pages12
    JournalScience of the Total Environment
    Volume490
    DOIs
    Publication statusPublished - 2014

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    Ash handling
    Coal
    coal-fired power plant
    Lakes
    Sediments
    Contamination
    ash
    Metals
    cadmium
    metal
    lake
    history
    Cadmium
    selenium
    sediment
    sediment core
    Selenium
    pollutant
    Impurities
    arsenic

    Cite this

    @article{13ba31b9c25b44c8a9c25bdec50ecef4,
    title = "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",
    abstract = "This 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.",
    keywords = "Coal, Power station, Ash dam, 137 Cs, 210 Pb, Sediment",
    author = "Bill MAHER and Jaimie Potts and Bernd GRUBER and Graeme Batley and Anne TAYLOR and Anthony Chariton and Atun Zawadzki and Henk Heijnis",
    year = "2014",
    doi = "10.1016/j.scitotenv.2014.04.055",
    language = "English",
    volume = "490",
    pages = "659--670",
    journal = "Science of the Total Environment",
    issn = "0048-9697",
    publisher = "Elsevier",

    }

    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. / MAHER, Bill; Potts, Jaimie; GRUBER, Bernd; Batley, Graeme; TAYLOR, Anne; Chariton, Anthony; Zawadzki, Atun; Heijnis, Henk.

    In: Science of the Total Environment, Vol. 490, 2014, p. 659-670.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - 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

    AU - MAHER, Bill

    AU - Potts, Jaimie

    AU - GRUBER, Bernd

    AU - Batley, Graeme

    AU - TAYLOR, Anne

    AU - Chariton, Anthony

    AU - Zawadzki, Atun

    AU - Heijnis, Henk

    PY - 2014

    Y1 - 2014

    N2 - This 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.

    AB - This 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.

    KW - Coal

    KW - Power station

    KW - Ash dam

    KW - 137 Cs

    KW - 210 Pb

    KW - Sediment

    U2 - 10.1016/j.scitotenv.2014.04.055

    DO - 10.1016/j.scitotenv.2014.04.055

    M3 - Article

    VL - 490

    SP - 659

    EP - 670

    JO - Science of the Total Environment

    JF - Science of the Total Environment

    SN - 0048-9697

    ER -