Study of fluoride content in some commercial phosphate fertilizers

Ramteke, Lokeshkumar P.; Sahayam, A.C.; Ghosh, Arup; Rambabu, U.; Reddy, M. R. P.; Popat, Kiritkumar Mangaldas; Rebary, Babulal; Kubavat, Denish; Marathe, Kumudini V.; Ghosh, Pushpito K.

doi:10.1016/j.jfluchem.2018.03.018

Cited by 60 publications

(21 citation statements)

References 12 publications

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“…In addition, Cronin et al (2000) suggest that HF gas scrubbed out of the effluent gases is frequently added back into the fertiliser during subsequent processing, so increasing the F content of the final product. In a study of phosphate fertilisers used in India, Ramteke et al (2018) found that between 3.14 and 74.8 % of the original F remains in the fertiliser. Loganathan et al (2007) calculated that single superphosphate fertiliser applications to soil in New Zealand amounting to 10-30 kg of P ha -1 a -1 added between 1 and 6 kg F ha -1 a -1 .…”

Section: Application Of Phosphate Fertilisermentioning

confidence: 99%

“…Loganathan et al (2007) calculated that single superphosphate fertiliser applications to soil in New Zealand amounting to 10-30 kg of P ha -1 a -1 added between 1 and 6 kg F ha -1 a -1 . Ramteke et al (2018) suggested that during 2011-2012, 10.2 Mt of single superphosphate fertilizer was applied to soils in India along with 4.79 Mt of diammonium phosphate. Using these figures Ramteke et al (2018) calculated that 128,000 ± 14,550 t a -1 of Fwere added to soil in India.…”

Section: Application Of Phosphate Fertilisermentioning

confidence: 99%

“…Ramteke et al (2018) suggested that during 2011-2012, 10.2 Mt of single superphosphate fertilizer was applied to soils in India along with 4.79 Mt of diammonium phosphate. Using these figures Ramteke et al (2018) calculated that 128,000 ± 14,550 t a -1 of Fwere added to soil in India.…”

Section: Application Of Phosphate Fertilisermentioning

confidence: 99%

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Fluorine in the environment, a review of its sources and geochemistry

Fuge

2019

Applied Geochemistry

163

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While F is an essential constituent of some rock-forming minerals such as fluorite and apatite, its major occurrence in the lithosphere is within hydroxysilicate minerals where Foccupies OHlattice sites. The majority of the F occurring in the secondary environment derives from natural weathering processes with some soils derived from F-rich parent rocks containing over 1weight (wt) % F. Other natural sources of F are vulcanicity, wind-blown dust and a minor marine-derived component, with biomass burning, being in part natural, also a source. Several anthropogenic sources of environmental F have also been identified. Of the anthropogenic sources, the application of phosphate fertiliser, which probably adds over 2.3 Mt a-1 F to soils globally, represents the largest. While much of this is strongly retained in soils, some may be transferred to groundwater. In some abandoned mine sites in the UK where fluorite was associated with the mineralisation, soil F contents of up to 8 wt % have been recorded with plants growing on the sites containing up to 1wt % F. The rapid growth of urban areas in India, Pakistan and Bangladesh has resulted in an upsurge of brickmaking in Asia, with these 3 countries plus China accounting for over 75% of global brick production. As a result there is a large number of unregulated brick kilns which emit HF into the surrounding environment. Based on an annual global brick production of 1,500 billion and the F contents of brick clays, it is estimated that about 1.8 Mt a-1 F are released to the environment from brick manufacture. This suggests that brickmaking is the largest source of atmospheric F emissions dwarfing that of coal combustion, 0.2-0.3 Mt a-1 , phosphate fertiliser production, 0.07-0.10 Mt a-1 , aluminium smelting, 0.041 Mt a-1 , and even vulcanicity, 0.3-0.7 Mt a-1. However, it is apparent that atmospheric F emissions are not transported globally and as such their effects are manifested only in the local environment. Emissions from industry sited close to urban centres can impact these environments together with domestic coal combustion and the release of F from high octane fuels in motor vehicles. A more recent source of F in the environment stems from the large number of fluorocarbon compounds in everyday use. Degradation of some of these fluorocarbon compounds together with pyrolysis of fluoropolymers and burning of household refuse has resulted in the deposition of organofluorine compounds such trifluoroacetic acid in the environment.

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Section: Application Of Phosphate Fertilisermentioning

confidence: 99%

Section: Application Of Phosphate Fertilisermentioning

confidence: 99%

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Fluorine in the environment, a review of its sources and geochemistry

Fuge

2019

Applied Geochemistry

163

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“…Fluoride (F) is one of the most phytotoxic contaminants ( Panda, 2015 ). High F concentrations are released into the environment as a result of several anthropogenic activities, including aluminum smelting ( Choubisa & Choubisa, 2016 ), coal burning ( Ding et al, 2013 ) brick manufacturing ( Jha et al, 2008 ), direct application of phosphate fertilizers ( Ramteke et al, 2018 ) and fluoridated water irrigation, which is also a source of diffuse soil fluoride ( Fawell et al, 2006 ). In the atmosphere, F may be released in both gaseous and liquid forms at concentrations ranging from 0.01 to 10 mg L −1 ( Smith & Hodge, 1979 ).…”

Section: Introductionmentioning

confidence: 99%

Bioindicator potential of Ricinus communis to simulated rainfall containing potassium fluoride

Rodrigues

Sales

Filho

et al. 2020

PeerJ

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Background Fluoride pollution is a global problem because of its high phytotoxicity. Fluoride is released in air, water and soil through industrial processes, where it damages various plant species. Ricinus communis is widely distributed in Brazil, India and China and has been extensively used as a phytoremediation species in heavy metal-contaminated soils. However, few studies regarding the effect of air pollutants on R. communis have been published, and no information about the exposure of this species to fluoride is available. Therefore, the aim of the present study was to investigate the effects of fluoride on R. communis morphoanatomical and physiological responses using simulated rainfall containing potassium fluoride (KF). Methods Young plants at approximately 10 days after emergence were treated daily with KF using simulated rainfall at 0, 1.5, 3.0 and 4.5 mg L−1, for 37 consecutive days. Chlorophyll a fluorescence, gas exchange, anatomical characteristics and fluoride accumulation in the roots and leaves were evaluated after this period. Results No visual or anatomical symptoms were observed for the first three treatments. Necrosis and chlorosis were visually evident after the 37th day of KF application at 4.5 mg L−1, followed by changes in parenchyma tissues, cell collapse and phenolic compound accumulation at the end of the experiment. No damage was observed in terms of photosynthetic photochemical and biochemical stages. Maintenance of physiological characteristics in the presence of fluoride accumulation in roots and leaves were shown to be important fluoride biomarkers. These characteristics suggest that R. communis is tolerant to 1.5 and 3.0 mg L−1 KF, and is anatomically sensitive at 4.5 mg L−1 KF.

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“…Fluorine occurs in nature as fluoride (F − ) ions and is found in air (as gases or particulates), in water (present in the form of hydrated F − ions), in soils and in living organisms [1]. Fluorine compounds are used in the metallurgical industry, mainly in the production of aluminium and manufacturing of glass [2], ceramics [3] and phosphate fertilizers [4]. Fluorine is present in 32 minerals as fluorides with or without carbonate, silicate, and phosphate and hydroxyl anions of alkali, alkaline earth, aluminium, bismuth, manganese or rare-earth cations [5].…”

Section: Introductionmentioning

confidence: 99%

Removal of fluoride from aqueous solution by porous Vaterite calcium carbonate nanoparticles

Abeykoon

Dunuweera

Liyanage

et al. 2020

Mater. Res. Express

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This study is based on a simple, low-cost and a novel approach towards the removal of excess fluoride ions from aqueous solution by absorbing fluoride on porous vaterite calcium carbonate nanoparticles (PVCCNPs) synthesised using ethylene glycol-water soft template method. SEM images clearly show the porous nature of aggregated nanoparticles present in the dry powder. Physicochemical properties of synthesised PVCCNP and fluoride on PVCCNP was characterised further by FTIR, XRD, XRF, EDX, and TGA-DTG. Fluoride removal by PVCCNPs from 100.00 ml of 10.0 mg l −1 NaF solution with 0.500 g of PVCCNPs, determined using a fluoride ion-selective electrode, indicates that around 90% removal is achieved within 1 h thus reducing the level to desired 1 ppm. The pseudo-second order kinetic model has a better fit to describe the adsorption of fluoride on PVCCNP than pseudofirst order model. The Langmuir isotherm model is more appropriate to describe the equilibrium behaviour of the adsorption process, than the Freundlich model. Given that the value of n (Freundlich constant) is greater than 1 (3.07) and R L value is in the range of 0<R L <1 (0.014-0.024) implies that the adsorption process is spontaneous and fluoride ions are favourably adsorbed on PVCCNPs. Langmuir model shows that the maximum adsorption capacity of fluoride is 1.956 mg g −1 . Excess fluoride in drinking waters causes several severe ill-health effects and filter media based on these nanoparticles can be used to remove fluoride down to safe and required levels to tackle these health problems. As such, PVCCNPs-based filter can be designed to remove fluoride in drinking waters. This may be a way for controlling fluorosis and many other diseases associated with excess fluoride present in drinking waters.

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Study of fluoride content in some commercial phosphate fertilizers

Cited by 60 publications

References 12 publications

Fluorine in the environment, a review of its sources and geochemistry

Fluorine in the environment, a review of its sources and geochemistry

Bioindicator potential of Ricinus communis to simulated rainfall containing potassium fluoride

Removal of fluoride from aqueous solution by porous Vaterite calcium carbonate nanoparticles

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