Artículo
Hydrogeochemistry of fluoride in the Quequen river basin: Natural pollutants distribution in the argentine pampa
Martínez, D. E.; Quiroz Londoño, Orlando Mauricio
; Massone, Hector Enrique; Palacio Buitrago, P.; Lima, María Lourdes
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
01/2012
Editorial:
Springer
Revista:
Environmental Earth Sciences
ISSN:
1866-6299
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Fluoride pollution is a widespread problem in Argentina, as it is in many areas of the World. Former investigations have demonstrated that the dissolution of volcanic glass disseminated in the loess-like sediments is the main source of fluoride in the Argentine pampas. Nevertheless, fluoride distribution is erratic and the factors controlling it are not yet well-known. A large amount of hydrochemical data collected in the Quequen Grande river catchment is used in order to contribute to the understanding of fluoride distribution and mobility in groundwater in the Argentine pampas. The Quequen Grande river catchment is 10,000 km2. It extends between two low hills ranges of Precambrian metamorphic rocks and sedimentary Paleozoic rocks, filled by a thick sequence of Cenozoic sediments, mainly silts and silt-clayed, with sand layers. These sediments form a multilayer phreatic aquifer, which is recharged from precipitation infiltration, discharging through streams directly into the sea. Fluoride concentration in surface water (n = 353) ranges between 0 and 6.5 mg/l, with an average value of 2.14 mg/l. Groundwater concentration (n = 135) is from 0 up to 5.7 mg/l, with an average of 1.84 mg/l. Considering the statistic distribution of fluoride, two groups of samples can be determined. A dominant group between 0 and 3 mg/l, with a mean value around 1.5 mg/l, corresponding to samples widely distributed in the catchment; and a second one group with fluoride contents between 3 and 6 mg/l, corresponding to a smaller area in the central-west border. Two different sources are proposed. Volcanic glass dissolution is responsible for dominant values in the catchment, while the weathering of biotite from the Paleozoic bedrock can be assumed to account for the higher concentrations in the second group.
Palabras clave:
ARGENTINE PAMPAS
,
FLUORIDE
,
HYDROGEOCHEMISTY
,
QUEQUEN GRANDE RIVER
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - MAR DEL PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MAR DEL PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MAR DEL PLATA
Citación
Martínez, D. E.; Quiroz Londoño, Orlando Mauricio; Massone, Hector Enrique; Palacio Buitrago, P.; Lima, María Lourdes; Hydrogeochemistry of fluoride in the Quequen river basin: Natural pollutants distribution in the argentine pampa; Springer; Environmental Earth Sciences; 65; 2; 1-2012; 411-420
Compartir
Altmétricas