Fluoride: A World Ubiquitous Compound, Its Chemistry, and Ways of Contamination

Sivasankar, V.; Darchen, André; Omine, Kiyoshi; Sakthivel, R.

doi:10.1007/978-3-319-40686-2_2

Cited by 39 publications

(24 citation statements)

References 105 publications

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“…The fluoride ion, as a strong ligand in water, forms a number of soluble complexes with polyvalent metal ions such as Mg 2+ , Fe 3+ , Al 3+ , and Ca 2+ based on the pH of the medium. However, because in alkaline soil, where Al and Fe are in low concentrations, fluoride was unable to bind with these cations to any appreciable extent, it replaced hydroxyl sites because the ionic radius of F (1.23-1.36 Å) is close to OH (1.37-1.40 Å) (Sivasankar et al, 2016). Such isomorphous substitution happens when cations of comparable size, but different charge are exchanged in crystals of clay minerals (Poulsen, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies established that once in the soil, fluoride is quite quickly fixed by the soil absorbing complex. It has been found that the pH and grain size of the soil, initial fluoride concentration in clay minerals, and salinity are the factors responsible for the adsorption-desorption process of fluoride in clay minerals (Huangand Jackson, 1965;Bower and Hatcher, 1967;Marion, Henricks, SOIL BIOLOGY Dutt and Fuller, 1976;Dubrovina and Kornblum, 1984;Sivasankar et al, 2016;Murugesh et al, 2016). Ilkun and Mutruk (1976) showed that with an increase in the content of silt and colloidal fractions, the ability of soils to retain fluoride rapidly increased.…”

Section: Introductionmentioning

confidence: 99%

“…To date, the literature has sufficiently covered fluoride behaviour in the soil-plant system (Pickering, 1985;Elrashidi and Lindsay, 1986;Semendyaeva et al, 1988;Litvinovich et al, 2001;Litvinovich and Pavlova, 2002;Mirlean and Roisenberg, 2007;Jha et al, 2009;Mourad et al, 2009;Tayibi et al, 2009;Pérez-López et al, 2010;Smidt et al, 2011;Lakshmi et al, 2016;Savenko and Savenko, 2019). However, insufficient research has been done on fluoride migration in alkaline soil (Ilkun and Motruk, 1976;Litvinovich et al, 1999;Poulsen, 2011), and publications on mathematical modelling of fluoride migration are scarce (Frid and Borisochkina, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Migration behaviour of fluoride in contaminated soils near ammophos production plant: laboratory studies

Litvinovich

Pavlova

Lavrishchev

et al. 2020

BioComm

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Fluoride contamination of irrigated alkaline soils (Irragric Anthrosols) is a common problem in the areas of vast cotton production in Uzbekistan. Large number of laboratory measurements using corresponding models allows deeper studying the fluoride mobility in contaminated soil in the vicinity of Ammophos production factory. In a series of column experiments the migration ability of fluoride was studied in Irragric Anthrosols of different particle size distribution and four different experiments using near neutral and acidic washing water in the low, moderate and highly contaminated soils. It has been established that studied soils, located in the zone of airborne emissions from the Ammophos production plants, have a weak fluoride-holding capacity. The intensity of fluoride migration was conditioned by the initial level of soil contamination. Repeated simulated irrigation of the soil didn’t result in complete removal of fluoride. At low contamination level (3.5 mg F/kg soil) on sandy-loam soil, concentration of fluoride increased with increasing of the volume of leaching moisture. With medium contamination level (6.1 mg F/kg soil) on a loamy soil, the average leaching rate was near zero throughout the measurement interval. At high contamination level (17.5 mg/kg) on heavy textured soil, the increase in the concentration of fluoride in the eluates was observed throughout the entire study interval and posed a threat of ground water contamination.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Migration behaviour of fluoride in contaminated soils near ammophos production plant: laboratory studies

Litvinovich

Pavlova

Lavrishchev

et al. 2020

BioComm

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“…Apatite contains florite and occurs as an accessary mineral in sedimentary horizon, [25], weathering process and the circulation of water in rocks and soils leach out Fluoride into the groundwater. Factors that favour the release of Fluoride into groundwater in sediments are the mineralogical composition of the sediment, the extent of sediment alteration and the Geochemistry of the surrounding water, [26]. They authors went further to point out that high Fluoride of clastic sediment is concentrated in micas and clay mineral like Illites, in fluvial sediments the release of Fluoride under acidic condition of low PH condition is controlled by the dissolution/ alteration of Fluorapatite and biotite minerals originating from fluoride rich igneous and metamorphic rocks.…”

Section: Origin and Sources Of Fluoride In The Areamentioning

confidence: 99%

“…Kaolinite ˃˃ soap alkaline soil, vermiculite. Goethite; layered silicate mineral ˃ various oxides [26]. Base on the findings of [28] the dominant water type in the Chad basin in Nigeria is the sodium bicarbonate type, this will dissolve and concentrate Fluoride in the groundwater, the mixing up of bicarbonate groundwater with aquifer sediments triggers a reaction that lead to the ejection of Fluoride from the fluorite bearing minerals resulting in the Fluoride becoming enriched in the groundwater, this is represented in equation 1.…”

Section: Origin and Sources Of Fluoride In The Areamentioning

confidence: 99%

Appraisal of Fluoride Concentration, Distribution and Geogenic Origin in Ground and Surface Water from Semi-Arid Region, Part of Yobe State North-eastern Nigeria

Kwaya¹,

Hamidu²,

Umar³

et al. 2017

HYD

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The Fluoride concentration of water sources from part of Yobe State has been investigated, Fluoride levels in Pond water is between 0.71 and 1.36 mg/l, Dugwells concentration is from 0.00 to 1.5mg/l. The sampled water from tube wells and boreholes have concentrations ranges of 0.65-1.5 mg/l and 0.00-2.2 mg/l respectively with the level of concentration being a function of depth. Health risk assessment have revealed three classes of risk in terms of Fluoride concentration levels in the water with 16 samples representing 14.3% falling within the Risk class of 1.5≤ R≤ 2.5(risk). Individual consuming such water have the tendency of getting dental fluorosis. Origins of Fluoride in the water are from Fluoride bearing minerals like Micas, Amphiboles, Illites, Apatite, Topaz, and Cryolite which occur in the sandy and clayey layers, anthropogenic sources from agricultural and irrigated land and leachate from dumps are the other possible sources of Fluoride in the tube wells and ponds water respectively. The dissolution, distribution and concentration of Fluoride in groundwater in the area are favoured by the high temperature high evapotranspiration rate and low rainfall situation of the semi-arid climate. Geochemical situation that allowed the leaching of Fluoride into the water are; high Alkaline or soda water environment, anion exchange of OH for F of the aquifer material, water residence time in the aquifer and type of climate. Drab and Sierozem Soil types control and facilitate the mobility and leaching of Fluoride in arid and semi-arid area. Generally the result has shown the area to have medium to average concentration of Fluoride in its waters with the highest value slightly above the 1.5 mg/l of WHO (2011) safe limit for drinking water. Periodic monitoring of Fluoride in the water sources is recommended so as to minimize the chances of people taking in water with high undesirable harmful Fluoride concentration.

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Magnetic sugarcane bagasse composite for atrazine and fluoride removal

Helen

Blanco-Flores

López-Téllez

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: The present investigation focuses on the synthesis and application of a magnetic adsorbent material formed by the agro-industrial waste sugarcane bagasse (SCB). Its application in the removal of fluoride and atrazine demonstrates its properties as a potential adsorbent material for the treatment of contaminated wastewater. RESULTS:The synthesis method proved to be simple and reproducible. The presence and distribution of magnetite and fluoride on the surface of the material were studied by characterization techniques (SEM, EDX, FTIR-ATR). Several specific functional groups were identified which may interact with atrazine and fluoride molecules in the adsorption process. Kinetic results indicated that second-and pseudo-second-order model fitted better for the fluoride and atrazine adsorption processes, respectively. The adsorption processes took place by chemisorption onto heterogeneous surfaces. Isotherm data fitted better to the Langmuir-Freundlich model in both systems; therefore, the process took place by a combination of mechanisms. Cellulose and lignin from sugarcane bagasse contribute in the adsorption process, while magnetite not only improve performance of composite for the removal of the chemical species tested, but also achieve a simple separation process via magnetic interactions' with a common magnet. The adsorption capacities of the composites were 0.5036 mg g −1 for fluoride and 40.11 mg g −1 for atrazine. CONCLUSION: The synthesis of the magnetic composite is simple and generates a material that is easy to manipulate and isolate after the process. The affinity of the composite with atrazine is greater than with fluoride; however, the composite can be used in systems with low concentration.

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Fluoride: A World Ubiquitous Compound, Its Chemistry, and Ways of Contamination

Cited by 39 publications

References 105 publications

Migration behaviour of fluoride in contaminated soils near ammophos production plant: laboratory studies

Migration behaviour of fluoride in contaminated soils near ammophos production plant: laboratory studies

Appraisal of Fluoride Concentration, Distribution and Geogenic Origin in Ground and Surface Water from Semi-Arid Region, Part of Yobe State North-eastern Nigeria

Magnetic sugarcane bagasse composite for atrazine and fluoride removal

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