Transfer of caesium from silage to cows milk: Observations and models

Mitchell, N.G.; Coughtrey, P. J.; Beetham, C.J.; Hughes, John‐Wayne; Clench, S. F.; Walters, B.

doi:10.1016/0048-9697(89)90330-6

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…The dose dependent reduction observed in radiocaesium transfer in the present study agrees well with results in dairy cows. Hove & Ekern (1988) observed 33, 77 and 68 % reduction in the radiocaesium transfer to milk when 250, 500 or 750 g bentonite was fed with contaminated hay, and Mitchell et al (1989) reported 37 and 67% reductions in radiocaesium transfer to milk on the two lowest dose levels. Results from comparable dose/response trials appear not to be available for sheep, but reductions of 80% or more after feeding daily doses of about 50g was reported both by Van den Hoek (1976) and Anderson (1989), and Daburon et al (1991) reported 60 and 85% reduction when sheep were fed 30 or 60 g/d of vermiculite respectively.…”

Section: Discussionmentioning

confidence: 99%

Hexacyanoferrates and bentonite as binders of radiocaesium for reindeer

Staaland¹,

Pedersen²

1991

Ran

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The effects of varying doses of caesium binders (Bentonite and several forms of iron-hexacyanoferrates) on radiocaesium accumulation in red blood cells and on radiocaesium transfer to urine and faeces were studied in feeding experiments with reindeer calves. The caesium binders were added to a ration of lichen (containing 9.5 kBq of 134Cs+137Cs originating from the Chernobyl accident) and fed together with a pelleted reindeer feed (RF-71) for 42 days. A 50% reduction in red blood cell radiocaesium concentration was obtained with a daily dose of 1 mg/kg body weigth of ammoniumironhexacyanoferrate (AFCF) and with 500 mg/kg of bentonite. Three mg/kg of AFCF or 2 g/kg of bentonite reduced both urinary excretion and RBC concentrations with more than 80%. It is concluded that iron-hexacyanoferrates, as a result of their high caesium binding capacity, are particularly useful as caesium binders for free ranging ruminants like the reindeer.

Hexacynoferrater og bentonitt som bindere av radiocesium i rein

Abstract in Norwegian / Sammendrag: Effekten av bentonitt og ulike typer jernhexacyanoferrater (Berlinerblått) på akkumulering av radioaktivt cesium i røde blodlegemer og på utskilling av radioaktivt cesium i urin ble undersøkt i foringsforsøk med reinkalver. Cesiumbinderne ble gitt daglig sammen med lav som inneholdt 9.5 kBq 134Cs+137Cs fra Tsjernobyl ulykken, og 1 kg reinfor (RF-71) i en periode på 42 dager. En daglig dose på 1 mg/kg kroppsvekt av ammoniumjernhexacyano-ferrat (AFCF) reduserte radiocesiuminnholdet i blodlegemer med 50%, mens en dose pa 500 mg/kg bentonitt var nødvendig for å oppnå samme effekt. Tre mg/kg AFCF eller 2 g/kg/bentonitt var nødvendig for å oppnå mer enn 80% reduksjon i radiocesium konsentrasjonen i blodlegemer og i radiocesium utskilling med urinen. På grunn av de små daglige mengder som kreves er jern-hexacyanoferratene spesielt velegnete som cesiumbindere for beitedyr.

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Section: Discussionmentioning

confidence: 99%

Hexacyanoferrates and bentonite as binders of radiocaesium for reindeer

Staaland¹,

Pedersen²

1991

Ran

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Hexacynoferrater og bentonitt som bindere av radiocesium i rein

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“…Different materials have been administered to ruminants for reducing radiocaesium transfer to meat and milk products. These include bentonite (Andersson 1989, Mitchell et al 1989, zeolite (Phillippo et al 1988, vermiculite (Hazzard 1969), kaolin (Giese 1989), stable caesium (Oughton et al 1991) and crude fibre (Johnson et al 1968). Organic complexes such as ferric hexacyanoferrates, commonly referred to as Prussian Blue (PB) compounds are, however, the most effective caesium binders on a unit weight basis (Giese 1989.…”

Section: Introductionmentioning

confidence: 99%

The effect of ammonium ferric hexacyanoferrate on reducing radiocaesium transfer from grass silage to sheep

Paasikallio¹,

Sormunen-Cristian²,

Jaakkola³

et al. 2000

AFSci

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A study was carried out to examine the effect of ammonium ferric hexacyanoferrate (AFCF) on the transfer of radiocaesium from grass silage to the tissues of male lambs. During ensiling, a formic acid based additive and AFCF were sprayed on grass contaminated with 134Cs and the mixture was allowed to incubate for 45 days. A dose of 21 mg AFCF d-1, fed to sheep offered contaminated silage for fourteen days, reduced 134Cs transfer to muscle by 45% compared to that of control sheep. An equivalent dose of AFCF administered in a capsule reduced transfer by only 3%. In another experiment, AFCF intake of 50, 100 and 150 mg d-1 for ten days reduced 134Cs transfer to sheep muscle by 75, 82 and 86%, respectively. In control lambs, of average live weight 38 and 47 kg, the feed to muscle 134Cs transfer coefficient averaged 0.15 d kg-1, but equilibrium between tissue and feed 134Cs had probably not been reached due to the short feeding period. Increasing doses of AFCF from 0 to 150 mg d-1 increased the faecal/urinary 134Cs ratio from 2 to 42.;

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Chemical methods to reduce the radioactive contamination of animals and their products in agricultural ecosystems

Voigt

1993

Science of The Total Environment

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Transfer of caesium from silage to cows milk: Observations and models

Cited by 5 publications

References 5 publications

Hexacyanoferrates and bentonite as binders of radiocaesium for reindeer

Hexacyanoferrates and bentonite as binders of radiocaesium for reindeer

The effect of ammonium ferric hexacyanoferrate on reducing radiocaesium transfer from grass silage to sheep

Chemical methods to reduce the radioactive contamination of animals and their products in agricultural ecosystems

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