Risk assessment of fluoride exposure in drinking water of Tunisia

Guissouma, Wiem; Hakami, Othman; Al-Rajab, Abdul Jabbar; Tarhouni, Jamila

doi:10.1016/j.chemosphere.2017.03.011

Cited by 159 publications

(46 citation statements)

References 16 publications

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“…Endemic fluorosis afflicts N260 million individuals worldwide in 25 different nations, and N100 million people in southeast Asia, including India, Pakistan and Sri Lanka (Farooqi et al, 2007a(Farooqi et al, , 2007bAmini et al, 2008;Ravenscroft et al, 2009;Rafique et al, 2009;Kim et al, 2012). Both dental and skeletal fluorosis is a global problem, occurring in various countries, such as Ethiopia, Kenya and Tunisia (Rango et al, 2010(Rango et al, , 2013Olaka et al, 2016;Guissouma et al, 2017), India (Jacks et al, 2005;Vikas et al, 2013), China (Smedley et al, 2003;Guo and Wang, 2005;Guo et al, 2007;Amini et al, 2008;Wang et al, 2009;Currell et al, 2011), Brazil (Souza et al, 2013), and Pakistan (Farooqi et al, 2007a(Farooqi et al, , 2007b.…”

Section: Introductionmentioning

confidence: 99%

Fluoride prevalence in groundwater around a fluorite mining area in the flood plain of the River Swat, Pakistan

Rashid

Guan

Farooqi

et al. 2018

Science of The Total Environment

137

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This study investigated the fluoride (F) concentrations and physicochemical parameters of the groundwater in a fluorite mining area of the flood plain region of the River Swat, with particular emphasis on the fate and distribution of F and the hydrogeochemistry. To better understand the groundwater hydrochemical profile and F enrichment, groundwater samples (n=53) were collected from shallow (24-40m), mid-depth (48-65m) and deep (85-120m) aquifers, and then analysed using an ion-selective electrode. The lowest F concentration (0.7mg/L) was recorded in the deep-aquifer groundwater, while the highest (6.4mg/L) was recorded in shallow groundwater. Most groundwater samples (62.2%) exceeded the guideline (1.5mg/L) set by the World Health Organization (WHO); while for individual sources, 73% of shallow-groundwater samples (F concentration up to 6.4mg/L), 42% of mid-depth-groundwater samples, and 17% of deep-groundwater samples had F concentrations that exceeded this permissible limit. Assessment of the overall quality of the groundwater revealed influences of the weathering of granite and gneisses rocks, along with silicate minerals and ion exchange processes. Hydrogeochemical analysis of the groundwater showed that Na is the dominant cation and HCO the major anion. The anionic and cationic concentrations across the entire study area increased in the following order: HCO>SO>Cl>NO>F>PO and Na>Ca>Mg>K, respectively. Relatively higher F toxicity levels were associated with the NaHCO water type, and the chemical facies were found to change from the CaHCO to (NaHCO) type in calcium-poor aquifers. Thermodynamic considerations of saturation indices indicated that fluorite minerals play a vital role in the prevalence of fluorosis, while under-saturation revealed that - besides fluorite minerals - other F minerals that are also present in the region further increase the F concentrations in the groundwater. Finally, a health risk assessment via Dean's classification method identified that the groundwater with relatively higher F concentrations is unfit for drinking purposes.

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Section: Introductionmentioning

confidence: 99%

Fluoride prevalence in groundwater around a fluorite mining area in the flood plain of the River Swat, Pakistan

Rashid

Guan

Farooqi

et al. 2018

Science of The Total Environment

137

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“…[25][26][27][28][29][30] About 66 million people in India living in 250 common pathways (intake and dermal) as per the USEPA health risk model. 18,22,[37][38][39] The present study was carried out to (i) identify the major geochemical processes and anthropogenic sources of F À from hydrogeochemical parameters, (ii) delineate uoridevulnerable zones using spatial distribution maps, (iii) rank the groundwater quality for drinking utilities using the entropy water quality index (EWQI) and (iv) assess the human health risk of uoride-enriched groundwater from oral and dermal intake pathways in seven age groups (i.e., 5-12 months, 5-13 years, 14-16 years, 17-20 years, 21-23 years, $23 years and >65 years) in a semi-arid part of South India, with the principal objective of effective water utilization and groundwater protection.…”

Section: Introductionmentioning

confidence: 99%

The effects of geochemical processes on groundwater chemistry and the health risks associated with fluoride intake in a semi-arid region of South India

Karunanidhi¹,

Aravinthasamy²,

Deepali

et al. 2020

RSC Adv.

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“…More than 10 million people in the Guizhou Province, China and surrounding areas suffer from various forms of fluorosis because of high F − concentrations in drinking water . However, high levels of F − also occur in many parts of the world, such as Latin America, Pakistan, India, and Tunisia . Therefore, the World Health Organization has set 1.5 mg/L of F − as the upper limit in drinking water…”

Section: Introductionmentioning

confidence: 99%

“…4 However, high levels of F − also occur in many parts of the world, such as Latin America, Pakistan, India, and Tunisia. [5][6][7][8] Therefore, the World Health Organization has set 1.5 mg/L of F − as the upper limit in drinking water. 9 In order to remove F − from water, several conventional treatment methods have been developed, including adsorption, precipitation, electrodialysis, nanofiltration, and reverse osmosis.…”

Section: Introductionmentioning

confidence: 99%

Investigation of fluorapatite crystallization in a fluidized bed reactor for the removal of fluoride from groundwater

Deng

Zhang

Zhou

2018

J of Chemical Tech & Biotech

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BACKGROUND This work further investigates fluoride removal from groundwater by induced crystallization in batch experiments and in a fluidized bed reactor (FBR). Phosphate rock (PR), which is an abundant ore and represents the basic raw material for the phosphatic fertilizer industry, was used as seed crystal in the induced crystallization process. RESULTS Induced crystallization in FBR reduced the concentration of F− in synthetic groundwater from 9.5 mg L‐1 to <1.0 mg L‐1. Phases with the potential for precipitation were calculated through thermodynamic equilibrium modeling. The formed precipitates were identified by powder x‐ray diffraction (XRD) and scanning electron microscopy, coupled with energy dispersive spectroscopy (SEM–EDS). Finally, fluorapatite crystallization mechanisms were confirmed by the induced crystallization of Ca5(PO4)3F on the surface of PR. CONCLUSION The fluorapatite crystallization process in FBR removed F− from groundwater, and the used seed crystal PR was rich in phosphorus and that could be recovered as raw material for the phosphatic fertilizer industry. © 2018 Society of Chemical Industry

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Risk assessment of fluoride exposure in drinking water of Tunisia

Cited by 159 publications

References 16 publications

Fluoride prevalence in groundwater around a fluorite mining area in the flood plain of the River Swat, Pakistan

Fluoride prevalence in groundwater around a fluorite mining area in the flood plain of the River Swat, Pakistan

The effects of geochemical processes on groundwater chemistry and the health risks associated with fluoride intake in a semi-arid region of South India

Investigation of fluorapatite crystallization in a fluidized bed reactor for the removal of fluoride from groundwater

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