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

E Donner; K Scheckel; Ryo Sekine; R S Popelka-Filcoff; J W Bennett; G Brunetti; R Naidu; S P McGrath; E Lombi

doi:10.1016/j.envpol.2015.05.017

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

Journal article

Open access

Peer reviewed

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

E Donner, K Scheckel, Ryo Sekine, R S Popelka-Filcoff, J W Bennett, G Brunetti, R Naidu, S P McGrath and E Lombi

Environmental Pollution, Vol.205, pp.78-86

2015

DOI: https://doi.org/10.1016/j.envpol.2015.05.017

PMID: 26021819

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Abstract

biosolids

E-values

isotopic dilution

silver

speciation

XANES

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. © 2015 Elsevier Ltd.

Details

Title: Non-labile silver species in biosolids remain stable throughout 50 years of weathering and ageing
Authors: E Donner (Author) - University of South Australia
K Scheckel (Author) - Environmental Protection Agency
Ryo Sekine (Author) - University of South Australia
R S Popelka-Filcoff (Author) - Flinders University
J W Bennett (Author) - Australian Nuclear Science and Technology Organisation
G Brunetti (Author) - University of South Australia
R Naidu (Author) - University of South Australia
S P McGrath (Author) - Rothamsted Research
E Lombi (Author) - University of South Australia
Publication details: Environmental Pollution, Vol.205, pp.78-86
Publisher: Elsevier Ltd
Date published: 2015
DOI: 10.1016/j.envpol.2015.05.017
ISSN: 0269-7491; 1873-6424; 0269-7491
PMID: 26021819
Copyright note: © 2015 Elsevier. Licensed under the Creative Commons Attribution-NonCommercialNoDerivatives 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.
Organisation Unit: University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99513773302621
Output Type: Journal article

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