INVESTIGADORES
RIGALLI Alfredo
congresos y reuniones científicas
Título:
Temporal and spatial measurement of fluoride in drinking water.
Autor/es:
LUPO, MAELA; LOMBARTE, MERCEDES; PILOTTI FLORENCIA; MORENO HILDA; FINA, BRENDA; RIGALLI ALFREDO
Lugar:
Szczecin
Reunión:
Congreso; XXXTH Conference of the International Society for Fluoride Research, advances in fluoride research; 2012
Institución organizadora:
International Society for Fluoride Research
Resumen:
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TEMPORAL
AND SPATIAL MEASUREMENT OF FLUORIDE IN DRINKING WATER.
Lupo
Maela, Lombarte Mercedes, Pilotti Florencia, Moreno Hilda, Fina
Brenda, Rigalli Alfredo.
Bone
Biology Laboratory. Rosario National University. Rosario. Argentina
Fluoride
is currently found in nature, as part of rocks and salts. Also,
it is used in the industry and the human health, whose toxic effects
are dose-dependent. It is a usual component of water and the upper
limit of its concentration in water accepted by the WHO for human
consumption is 1.5 ppm. Exposure to fluoride from natural sources is
increasing and few studies of the
groundwater concentration of fluoride have been carried out in
Argentina. The aim of this work was to
describe the levels of fluoride in water of Santa Fe, Argentina, and
evaluate changes through time and distance. Water from wells was
collected from different areas. Water
fluoride concentration was within the security range in 72% of the
towns. The comparison of this study with a previous one of 1945
revealed an increase of fluoride concentration in some areas. All
values are shown as mean ± SEM and expressed as ppm. The linear
regression of fluoride concentration in 1945 as a function of
fluoride concentration in 2011 was significantly lower than 1
(slope=0.67 ± 0.072, p<0.05), indicating an increase in the
amount of fluoride concentration in well water through this decades.
An important variability among the wells of the same town was
observed, independently of the distance between them. As an example,
3 wells of Venado Tuerto are shown, where fluoride concentration was
different among them ANOVA p<0.05, well 1: 1.92±0.06 ppm, well
2: 2.80±0.13, well 3: 0.25±0.01. In addition, an important
variability was observed in a same well through time. As an example
fluoride concentration in three consecutive months are shown:
February: 1.43±0.038 , March: 1.45±0.022 and April: 0.95±0.037,
ANOVA p<0.05. Conclusion: Fluoride concentration in groundwater
increased in the last 7 decades. The use of fertilizers and other
agricultural technologies could be the cause of the increase.
Fluoride concentration in ground water is different even in wells of
the same area and in the same well through time. As a consequence,
temporal sampling of different wells should be performed in order to
determine fluoride concentration in an area.