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  • Non-labile silver species in biosolids remain stable throughout 50 years of weathering and ageing

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    SekinePUB491.pdf (674.0Kb)
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    Accepted Manuscript (AM)
    Author(s)
    Donner, E
    Scheckel, K
    Sekine, R
    Popelka-Filcoff, RS
    Bennett, JW
    Brunetti, G
    Naidu, R
    McGrath, SP
    Lombi, E
    Griffith University Author(s)
    Sekine, Ryo
    Year published
    2015
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    Abstract
    Increasing commercial use of nanosilver has focussed attention on the fate of silver (Ag) in the wastewater release pathway. This paper reports the speciation and lability of Ag in archived, stockpiled, and contemporary biosolids from the UK, USA and Australia, and indicates that biosolids Ag concentrations have decreased significantly over recent decades. XANES revealed the importance of reduced-sulfur binding environments for Ag speciation in materials ranging from freshly produced sludge to biosolids weathered under ambient environmental conditions for more than 50 years. Isotopic dilution with 110mAg showed that Ag was ...
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    Increasing commercial use of nanosilver has focussed attention on the fate of silver (Ag) in the wastewater release pathway. This paper reports the speciation and lability of Ag in archived, stockpiled, and contemporary biosolids from the UK, USA and Australia, and indicates that biosolids Ag concentrations have decreased significantly over recent decades. XANES revealed the importance of reduced-sulfur binding environments for Ag speciation in materials ranging from freshly produced sludge to biosolids weathered under ambient environmental conditions for more than 50 years. Isotopic dilution with 110mAg showed that Ag was predominantly non-labile in both fresh and aged biosolids (13.7% mean lability), with E-values ranging from 0.3 to 60 mg/kg and 5 mM CaNO3 extractable Ag from 1.2 to 609 μg/kg (0.002–3.4% of the total Ag). This study indicates that at the time of soil application, biosolids Ag will be predominantly Ag-sulfides and characterised by low isotopic lability.
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    Journal Title
    Environmental Pollution
    Volume
    205
    DOI
    https://doi.org/10.1016/j.envpol.2015.05.017
    Copyright Statement
    © 2015 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Other environmental sciences not elsewhere classified
    Silver
    Biosolids
    XANES
    Speciation
    Isotopic dilution
    E-values
    Publication URI
    http://hdl.handle.net/10072/382407
    Collection
    • Journal articles

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