A Study of Fluoride Groundwater Occurrence in Posht-e-Kooh-e-Dashtestan, South of Iran
نویسنده
چکیده
A study was performed to determine groundwater fluoride concentration of Posht-e-Kooh-eDashtestan area located in southern Iran. Groundwater samples were collected from 26 wells, 4 springs, during dry and wet seasons. Fluoride concentration was determined in the water samples using SPADNS method. The results showed that fluoride concentrations are above the World Health Organization (WHO) maximum permissible limit of 1.5 mg/l and fluoride concentration in wet season is higher than its concentration in dry season. 3D fluoride distribution map was prepared in ArcGis 9.2. The result showed that fluoride values are associated with alluvial soils and dolomite that the latter along with gypsum are probable sources of fluoride into water resources. Local population is in the risk of adverse health effects of excessive fluoride intake in long-term and already many show evidence of dental fluorosis. Water treatment and defluoridation are recommended.
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