Provenance and geochemical behavior of fluorine in the soils of an endemic fluorosis belt, central Iran

Dehbandi, Reza; Moore, Farid; Keshavarzi, Behnam

doi:10.1016/j.jafrearsci.2016.12.016

Cited by 38 publications

(5 citation statements)

References 84 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the presence of anion like chlorite further increases fluoride concentration in water as observed in Toneta. (15) Similar results were observed in studies in other parts of the world, a study in Iran (16) also signified that water-rock interaction and influence of clay minerals is a geochemical mechanism responsible for fluoride augmentation in groundwater. Other studies, in Ghana (17) , Pakistan and even in eastern parts of India (18) underlined that the high fluoride-prone areas were located in close vicinity of granitic rocks and as the distance increases fluoride level in water decrease.…”

Section: Discussionsupporting

confidence: 79%

Geomedical Assessment of Areas Having Varying Groundwater Fluoride Levels in Rudraprayag District, Uttarakhand

Nidhi Sharma,

Vartika Saxena,

Manisha Naithani

et al. 2021

IJPHRD

View full text Add to dashboard Cite

Background: Fluorosis is a public health problem caused by excess intake of fluoride through drinking water. Groundwater around the rocks composed of fluoride-rich compounds may have a high concentration of fluoride. Thus, analyzing the geology of the area may serve as a guide for easy surveillance of fluorosis disease. Methods: The geological maps of the district were analyzed to develop a fluoride risk map for the occurrence of fluorosis i.e., the district was divided into three geological categories; high risk, intermediate, and low-risk areas. This map was correlated to the groundwater fluoride levels and prevalence and severity of dental fluorosis in the population of the corresponding area. A cross-sectional study was conducted using a purposive cluster sampling method, a total of 12 villages were selected from the district. Dental fluorosis was recorded in 558 children and 36 groundwater samples of these villages. Results: Fluoride contamination was almost nil (< 0.6ppm) in the areas composed of quartz and limestone which also showed an absence of fluorosis in the dependent population. It was moderate (0.6-1.5ppm) in areas ofaugen gneiss, porphyritic gneiss with mica schist which showed around 59.9% prevalence of fluorosis. Whereas, heavy contamination of fluoride (> 1.5ppm) was seen where granite was the main soil-forming parent rock and around 93% of the related population was affected by fluorosis. Conclusions: This study confirms the positive association between the presence of fluoride-rich rocks around the water source and the prevalence of fluorosis in the population of the area. Based on the finding of this study, geological maps of each district of the state may help in indicating the higher chances of occurrence of fluorosis in the respective districts.

show abstract

Section: Discussionsupporting

confidence: 79%

Geomedical Assessment of Areas Having Varying Groundwater Fluoride Levels in Rudraprayag District, Uttarakhand

Nidhi Sharma,

Vartika Saxena,

Manisha Naithani

et al. 2021

IJPHRD

View full text Add to dashboard Cite

show abstract

“…Weathering is a major natural pathway for fluorine in soil profiles [7,8]. Weathering is very complicated as it is controlled by a series of intricate processes, such as adsorption-desorption and dissolution-precipitation.…”

Section: Weatheringmentioning

confidence: 99%

“…This example emphasizes how countries might prioritize regulations based on their specific environmental conditions and potential exposure pathways. Beyond the total amount of soil fluorine, the key factor influencing its mobility, plant uptake, potential toxicity, and risk of groundwater contamination is the amount of water-soluble fluoride present [8]. This bioavailable fraction of soil fluorine is a more reliable indicator of potential environmental and human health risks.…”

Section: Global Variations In Soil Fluorine Regulationsmentioning

confidence: 99%

Reconciling Environmental Safety and Economic Feasibility: A Review of Soil Fluorine Management Strategies in the Republic of Korea

Ji,

Lee,

Bae

et al. 2024

Preprint

View full text Add to dashboard Cite

Fluorine naturally occurs in soil and rocks; however, concerns arise when human activities or specific compounds increase its levels or bioavailability. South Korea faces challenges in managing soil fluorine contamination even though existing regulations based on total fluorine content are stricter than those in many developed countries. However, these regulations can be economically impractical because of Korea's naturally high background levels of fluorine in the soil. This study examined the international landscape of soil fluorine management and explored potential solutions that balance environmental protection with economic considerations. We propose a shift towards regulating specific and harmful fluorine compounds and prioritizing remediation based on bioavailability assessments. This approach can guide Korea towards a more effective and sustainable strategy for managing soil fluorine contamination.

show abstract

“…In the Earth's crust under high-temperature conditions, fluorine is more mobile (Ali et al 2018). The process controlling the presence of fluorine in the environment is chemical weathering of minerals containing this element (natural origin) and anthropogenic activities i.e., application of phosphate fertilizers, dust fall in phosphate industrial area, and fluorine released from coal-burning (Pauwels et al 2015;Dehbandi et al 2017;Hong et al 2018;Singh et al 2018;Fuge 2019;. In groundwater, the occurrence of fluorine is often linked to the volcanic rocks in crystalline basement aquifers (Ozsvath 2006).…”

Section: Introductionmentioning

confidence: 99%

Fluoride ions in groundwater of the Turkana County, Kenya, East Africa

et al. 2021

View full text Add to dashboard Cite

Groundwater samples were evaluated throughout Turkana County (Kenya, East Africa) while looking for drinking water sources. Some samples showed high concentrations of fluoride with values in the range of 0.15–5.87 mg/L. Almost 50% of the samples exceeded the WHO and Kenyan potable water standard guideline value of 1.5 mg/L for drinking water quality. The hydrogeochemical studies revealed that the dominant cation in water is Na+ and the dominant anion is HCO3− resulting in Na-HCO3 type of groundwater, followed by Ca/Mg-HCO3 or Na-SO4 and Na-Cl in a few cases. Speciation modelling revealed that the groundwater is undersaturated with respect to gypsum and anhydrite, mostly undersaturated with respect to fluorite (6 samples are at equilibrium), and supersaturated or at equilibrium with respect to calcite (CaCO3). Precipitation of calcite favours the dissolution of F-rich minerals in the alkaline medium. Simultaneously, groundwater is enriched with sodium and bicarbonate, probably as a result of chemical weathering of Na-feldspar. Investigated groundwater can be presumably used for drinking purposes from 17 wells, but a detailed investigation of other trace element concentrations is necessary.

show abstract

Provenance and geochemical behavior of fluorine in the soils of an endemic fluorosis belt, central Iran

Cited by 38 publications

References 84 publications

Geomedical Assessment of Areas Having Varying Groundwater Fluoride Levels in Rudraprayag District, Uttarakhand

Geomedical Assessment of Areas Having Varying Groundwater Fluoride Levels in Rudraprayag District, Uttarakhand

Reconciling Environmental Safety and Economic Feasibility: A Review of Soil Fluorine Management Strategies in the Republic of Korea

Fluoride ions in groundwater of the Turkana County, Kenya, East Africa

Contact Info

Product

Resources

About