Association of hydrogeological factors in temporal variations of fluoride concentration in a crystalline aquifer in India

Sreedevi, P. D.; Ahmed, Shakeel; Madé, Benoı̂t; Ledoux, Emmanuel; Gandolfi, Jean-Marie

doi:10.1007/s00254-005-0167-z

Cited by 117 publications

(49 citation statements)

References 11 publications

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“…There was found a positive correlation between pH and fluoride, which indicates that high alkaline nature of the water promotes leaching of fluoride and thus, affects the concentration of fluoride in ground water. The ionic radius of fluoride (0.136 nm) was same as that of hydroxyl ion which can be easily substituted for one another from water at high pH (Sreedevi et al 2006;Gupta et al 2006). A negative relationship was observed between fluoride and bicarbonate which is generally observed in deep ground water at pH range of 8.3-9.2, however, a positive relationship was observed in shallow ground water (Muralidharan et al 2002).…”

Section: Resultsmentioning

confidence: 99%

Assessment of Groundwater Quality with Respect to Fluoride

Salve

Maurya

Kumbhare

et al. 2008

Bull Environ Contam Toxicol

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The study was conducted in the summer season (April-May 2007). The fluoride concentration along with physico-chemical parameters in ground water samples was determined in various villages of Kadi tehsil at Mehsana district of Gujarat state (India), since in most of the villages it is the only source of drinking water. The fluoride concentrations in these villages varied from 0.94 to 2.81 mg/L (1.37+/-0.56) with highest fluoride level at Visalpur (2.08 mg/L) and lowest at Adaraj (0.91 mg/L). There was found a positive correlation of pH with fluoride and a negative relationship of fluoride with bicarbonate which is generally observed in deep ground water.

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Section: Resultsmentioning

confidence: 99%

Assessment of Groundwater Quality with Respect to Fluoride

Salve

Maurya

Kumbhare

et al. 2008

Bull Environ Contam Toxicol

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“…F -and OH -often replace each other within minerals because of the similar ionic radii. Especially in an environment with a high pH, OH -often displaces F -, and F -is then released into the groundwater (Sreedevi et al 2006). Therefore, groundwater with a high level of fluorine usually also has a high pH value.…”

Section: Fluorine Contents Of Sedimentary Coresmentioning

confidence: 99%

The levels of fluorine in the sediments of the aquifer and their significance for fluorosis in coastal region of Laizhou Bay, China

Chen

Song

et al. 2013

Environ Earth Sci

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The levels of fluorine in sediment cores obtained from Changyi County (PZ core) and Laizhou County (TS core) are used to discuss the fluorine sources in groundwater and its enrichment dynamics. The sediments in the aquifer are mainly constituted of granite gravels. The levels of fluorine in the PZ and TS cores range from 130 to 468 mg/kg, 139-528 mg/kg, with average values of 324, 348 mg/kg, respectively, which show relatively lower levels than the national average of fluorine in the soil or sediment. Thus, the fluorosis in this area should not be attributed to the levels of fluorine in sediments. The average fluorine concentrations in the aquifer from top to bottom are 154, 139, 200, 222 mg/kg for the TS core, and 154, 130, 266, 272 mg/kg for the PZ core, respectively, which are the lowest of the cores and extremely lower levels than the fresh granites. Such a fact indicates that a vast amount of fluorine has been leached into the groundwater. Moreover, the fluorine leachability is estimated to be approximately 70 %, although the previous documents showed fluorine contents of the granite surrounding Laizhou Bay were almost equal to or even lower than the average levels of fluorine in fresh granites. Meanwhile, a simulation experiment also reveals that fluorine release from rocks increases with the addition of seawater and brine water.Therefore, the seawater intrusion may potentially enhance the fluorine leachability, and should be an important dynamic of fluorine enrichment.

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“…Thus, the observed mineral, if present, should be dissolved. The following equations explain the saturation of groundwater with respect to calcite and fluorite (Sreedevi et al, 2006) (Table 3), and temperature (20°C). Considering the errors in field measurements and SI computation, approximate boundaries for equilibrium zones (-0.5 < SI < 0.5) were defined by Carillo-Rivera et al (2002) and Mamatha and Rao (2010).…”

Section: Whole-rock Semi-quantative Mineral Composition Of the Silurimentioning

confidence: 99%

Determination of boron and fluoride sources in groundwater: Batch dissolution of carbonate rocks in water

Uppin

Karro

2013

Geochem. J.

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High natural fluoride (up to 6.1 mg/l) and boron (up to 2.1 mg/l) concentrations in groundwater are recorded in western Estonia, where a carbonaceous Silurian-Ordovician aquifer system is the main source of drinking water. The aim of this study is to examine the dissolution of boron and fluoride from different carbonate rocks using batch dissolution tests. The total boron and fluorine concentration within carbonate rocks varies between 100-1000 and 5-150 mg/kg, respectively. Generally, boron and fluoride concentrations increase as the amount of terrigenous material in the rock increases. Laboratory leaching experiments showed that the amount of leached boron and fluoride was proportional to the content of these elements in the rock samples. Further, boron and fluoride concentrations in leachates were positively correlated with the amount of terrigenous material in rocks. Both boron and fluoride concentrations in leachates continually rose over 49 days of leaching. Long-term water-rock interaction is responsible for the high boron and fluoride contents in groundwater of western Estonia.

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Association of hydrogeological factors in temporal variations of fluoride concentration in a crystalline aquifer in India

Cited by 117 publications

References 11 publications

Assessment of Groundwater Quality with Respect to Fluoride

Assessment of Groundwater Quality with Respect to Fluoride

The levels of fluorine in the sediments of the aquifer and their significance for fluorosis in coastal region of Laizhou Bay, China

Determination of boron and fluoride sources in groundwater: Batch dissolution of carbonate rocks in water

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