The accumulation of potentially-toxic metals by grazing ruminants

Wilkinson, J. M., Hill, J. and Phillips, C. J. C. (2003) The accumulation of potentially-toxic metals by grazing ruminants. Proceedings of The Nutrition Society, 62 2: 267-277. doi:10.1079/PNS2003209


Author Wilkinson, J. M.
Hill, J.
Phillips, C. J. C.
Title The accumulation of potentially-toxic metals by grazing ruminants
Journal name Proceedings of The Nutrition Society   Check publisher's open access policy
ISSN 0029-6651
1475-2719
Publication date 2003-05
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1079/PNS2003209
Volume 62
Issue 2
Start page 267
End page 277
Total pages 11
Place of publication Cambridge, U.K .
Publisher Cambridge University Press
Language eng
Formatted abstract
The main factors affecting the accumulation of potentially-toxic metals (PTM) by grazing animals are the presence of the metal, its concentration in herbage and at the soil surface, and the duration of exposure to the contaminated pasture and soil. In addition, the elapsed time between the contamination of the pasture and grazing, the quantity of soil ingested together with herbage, the mechanism of absorption of the metal into blood and the presence or absence of antagonistic metals can interact to influence the rate and extent of accumulation of heavy metals in edible body tissues. Models of the accumulation of metals by grazing animals may be used to determine the statutory limits of radionuclides and PTM in soils under grazed pastures. Meta-analysis of existing data, using a random-effects model, is a useful approach to understanding the factors affecting the accumulation of some metals, e.g. Cd. The target edible body tissues for the accumulation of most PTM are the liver and kidneys, with the exception of radiocaesium, which accumulates in muscle to a greater extent than in other tissues. The livers and kidneys of mature livestock that have been grazed on areas of pasture at the legal limit of contamination by Cd for more than one grazing season should be removed from the human food chain in order to reduce the risk of intake of Cd by the human population.
© The Authors 2003
Keyword Nutrition & Dietetics
potentially-toxic metals
grazing livestock
contaminated pasture and soil
accumulation in edible body tissues
Sewage-sludge
Heavy-metals
Cadmium Chloride
Dietary-cadmium
Environmental Contamination
Wet Deposition
Body-tissues
Lead Levels
Sheep
Zinc
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes This document is a journal review.

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: Excellence in Research Australia (ERA) - Collection
School of Veterinary Science Publications
 
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Created: Wed, 17 Oct 2007, 12:08:38 EST