Abstract
Fluoride content in the air and forage were determined, and symptoms of chronic fluoride poisoning in cattle raised in a mountain valley accommodating a phosphoric acid production plant were studied systematically over 10 years. The plant, processing phosphates with a fluoride content of 3.8%, emitted 20 kg of F daily. The atmospheric average F concentration ranged from zero to 10 micrograms/cu M, with 90% in the form of hydrofluoric acid and silicotetrafluoride, and 10% in the form of apatite. The fluorine content in forage, ranging from 20 to 50 ppm, and up to 164 ppm in one case, is responsible for pathological symptoms of fluorine poisoning in cattle. Fluorine content of about 30 ppm causes discoloration of the dental enamel in cattle fed such forage over more than 3 years, which corresponds to the fluorine residues of more than 1000 ppm in the jawbones. Periodic limping occurs in cattle fed forage with about 50 ppm of F over 5 years, corresponding to an F content of more than 4000 ppm. Such animals lose weight and yield much less milk than normal ones. Caries and loose teeth in cattle whose jawbones contain F residues of more than 3000 ppm are observed.
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Citation Formats
Bourbon, P, Tournut, J, Alary, J, Rouzaud, J F, and Alengrin, F.
Effects of low level fluorine pollution in a mountain valley.
Belgium: N. p.,
1971.
Web.
Bourbon, P, Tournut, J, Alary, J, Rouzaud, J F, & Alengrin, F.
Effects of low level fluorine pollution in a mountain valley.
Belgium.
Bourbon, P, Tournut, J, Alary, J, Rouzaud, J F, and Alengrin, F.
1971.
"Effects of low level fluorine pollution in a mountain valley."
Belgium.
@misc{etde_6498345,
title = {Effects of low level fluorine pollution in a mountain valley}
author = {Bourbon, P, Tournut, J, Alary, J, Rouzaud, J F, and Alengrin, F}
abstractNote = {Fluoride content in the air and forage were determined, and symptoms of chronic fluoride poisoning in cattle raised in a mountain valley accommodating a phosphoric acid production plant were studied systematically over 10 years. The plant, processing phosphates with a fluoride content of 3.8%, emitted 20 kg of F daily. The atmospheric average F concentration ranged from zero to 10 micrograms/cu M, with 90% in the form of hydrofluoric acid and silicotetrafluoride, and 10% in the form of apatite. The fluorine content in forage, ranging from 20 to 50 ppm, and up to 164 ppm in one case, is responsible for pathological symptoms of fluorine poisoning in cattle. Fluorine content of about 30 ppm causes discoloration of the dental enamel in cattle fed such forage over more than 3 years, which corresponds to the fluorine residues of more than 1000 ppm in the jawbones. Periodic limping occurs in cattle fed forage with about 50 ppm of F over 5 years, corresponding to an F content of more than 4000 ppm. Such animals lose weight and yield much less milk than normal ones. Caries and loose teeth in cattle whose jawbones contain F residues of more than 3000 ppm are observed. Osteosis is, however, practically nonexistent. The urine F content, ranging from 2 to 20 ppm, was normal with less than 100 ppm in 60% of all animals. The results show an accumulation of F in bones, and suggest an F content of 20 ppm in forage as a safe limit.}
journal = []
volume = {24:327}
journal type = {AC}
place = {Belgium}
year = {1971}
month = {Feb}
}
title = {Effects of low level fluorine pollution in a mountain valley}
author = {Bourbon, P, Tournut, J, Alary, J, Rouzaud, J F, and Alengrin, F}
abstractNote = {Fluoride content in the air and forage were determined, and symptoms of chronic fluoride poisoning in cattle raised in a mountain valley accommodating a phosphoric acid production plant were studied systematically over 10 years. The plant, processing phosphates with a fluoride content of 3.8%, emitted 20 kg of F daily. The atmospheric average F concentration ranged from zero to 10 micrograms/cu M, with 90% in the form of hydrofluoric acid and silicotetrafluoride, and 10% in the form of apatite. The fluorine content in forage, ranging from 20 to 50 ppm, and up to 164 ppm in one case, is responsible for pathological symptoms of fluorine poisoning in cattle. Fluorine content of about 30 ppm causes discoloration of the dental enamel in cattle fed such forage over more than 3 years, which corresponds to the fluorine residues of more than 1000 ppm in the jawbones. Periodic limping occurs in cattle fed forage with about 50 ppm of F over 5 years, corresponding to an F content of more than 4000 ppm. Such animals lose weight and yield much less milk than normal ones. Caries and loose teeth in cattle whose jawbones contain F residues of more than 3000 ppm are observed. Osteosis is, however, practically nonexistent. The urine F content, ranging from 2 to 20 ppm, was normal with less than 100 ppm in 60% of all animals. The results show an accumulation of F in bones, and suggest an F content of 20 ppm in forage as a safe limit.}
journal = []
volume = {24:327}
journal type = {AC}
place = {Belgium}
year = {1971}
month = {Feb}
}