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

Environment and Geography

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

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 Zn-65 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. (C) 2009 Elsevier Ltd. All rights reserved.

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

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10.1016/j.envpol.2009.06.034

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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 Zn-65 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. (C) 2009 Elsevier Ltd. All rights reserved.",

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AU - Donner, Erica

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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AB - 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 Zn-65 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. (C) 2009 Elsevier Ltd. All rights reserved.

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JF - Environmental Pollution

SN - 0269-7491

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Biological and chemical assessments of zinc ageing in field soils

Abstract

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