Biological and chemical assessments of zinc ageing in field soils

Erica Donner; Kris Broos; Diane Heemsbergen; Michael St J. Warne; Mike J. McLaughlin; Mark E. Hodson; Stephen Nortcliff

doi:10.1016/j.envpol.2009.06.034

Biological and chemical assessments of zinc ageing in field soils

Erica Donner, Kris Broos, Diane Heemsbergen, Michael St J. Warne, Mike J. McLaughlin, Mark E. Hodson, Stephen Nortcliff

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

As zinc (Zn) is both an essential trace element and potential toxicant, the effects of Zn fixation in soil are of practical significance. Soil samples from four field sites amended with ZnSO₄ were used to investigate ageing of soluble Zn under field conditions over a 2-year period. Lability of Zn measured using ⁶⁵Zn radioisotope dilution showed a significant decrease over time and hence evidence of Zn fixation in three of the four soils. However, 0.01 M CaCl₂ extractions and toxicity measurements using a genetically modified lux-marked bacterial biosensor did not indicate a decrease in soluble/bioavailable Zn over time. This was attributed to the strong regulatory effect of abiotic properties such as pH on these latter measurements. These results also showed that Zn ageing occurred immediately after Zn spiking, emphasising the need to incubate freshly spiked soils before ecotoxicity assessments.

Original language	English
Pages (from-to)	339-345
Number of pages	7
Journal	Environmental Pollution
Volume	158
Issue number	1
Early online date	25 Jul 2009
DOIs	https://doi.org/10.1016/j.envpol.2009.06.034
Publication status	Published - 1 Jan 2010
Externally published	Yes

Funding

E. Donner would like to thank the Commonwealth Scholarships Commission in the UK for PhD funding, and CSIRO Land and Water (Urrbrae, SA) for hosting the visit during which this work was undertaken. She is also grateful to Dr. F. Zhao, Prof. S. McGrath, Dr. G. Paton, Dr. E. Lombi, and Dr. R. Hamon for helpful discussions. The National Biosolids Research Program (NBRP) gratefully acknowledges its numerous financial supporters. The authors would like to acknowledge G. Barry, M. Bell, M. Boomsma, D. Nash, N. Penney, D. Pritchard, J. Stokes, and M. Whatmuff for leading the various state components of the NBRP; C. Baldock, G. Cozens, A. Daly, A. Pastuhova, G. Pollard, M. Smart, B. Tomczak, and C. Fiebiger for technical assistance.

Keywords

Ageing
Attenuation
Isotopic dilution
Lability
Lux biosensor

ASJC Scopus subject areas

Toxicology
Pollution
Health, Toxicology and Mutagenesis

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10.1016/j.envpol.2009.06.034

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title = "Biological and chemical assessments of zinc ageing in field soils",

abstract = "As zinc (Zn) is both an essential trace element and potential toxicant, the effects of Zn fixation in soil are of practical significance. Soil samples from four field sites amended with ZnSO4 were used to investigate ageing of soluble Zn under field conditions over a 2-year period. Lability of Zn measured using 65Zn radioisotope dilution showed a significant decrease over time and hence evidence of Zn fixation in three of the four soils. However, 0.01 M CaCl2 extractions and toxicity measurements using a genetically modified lux-marked bacterial biosensor did not indicate a decrease in soluble/bioavailable Zn over time. This was attributed to the strong regulatory effect of abiotic properties such as pH on these latter measurements. These results also showed that Zn ageing occurred immediately after Zn spiking, emphasising the need to incubate freshly spiked soils before ecotoxicity assessments.",

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AU - Broos, Kris

AU - Heemsbergen, Diane

AU - Warne, Michael St J.

AU - McLaughlin, Mike J.

AU - Hodson, Mark E.

AU - Nortcliff, Stephen

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KW - Attenuation

KW - Isotopic dilution

KW - Lability

KW - Lux biosensor

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Biological and chemical assessments of zinc ageing in field soils

Abstract

Funding

Keywords

ASJC Scopus subject areas

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