Fluoride in the environment: sources, distribution and defluoridation

Vithanage, Meththika; Bhattacharya, Prosun

doi:10.1007/s10311-015-0496-4

Cited by 247 publications

(72 citation statements)

References 112 publications

(95 reference statements)

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“…methods were conducted in Dugda district, Oromia reign. This study revealed the coverage of community fluoride filtered water utilization at the time of this study was 56.3% this utilization was comparable or nearly similar with studies done at the northern part of the Ethiopian Rift Valley that revealed the consumption of fluoride-free water dropped to less than 60% (9). But, lower as compared to studies As it is obtained from key informant interview result and community survey result 211(52%) of the interviewed H/H had orthodox religion followers in the area and they believe that bone char filters were interrupting the pasting day of their religion so that it is not acceptable by most of the local community in the area due to religious reason.…”

Section: Discussionsupporting

confidence: 83%

Assessing the challenges of utilizing fluoride filtered water and its factors, in Ethiopian central rift valley, Dugda district, Oromia region, south west Ethiopia,2019: A cross sectional study.

Alembo

Beyene

Erimias

et al. 2020

Preprint

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Background: The high level of fluoride in the Rift Valley water is due to naturally occurring fluoride that dissolves out of certain acidic volcanic rock formations. However, the utilization of drinking fluoride filtered water with appropriate level of fluoride provides more than 60% of fluoride required by the body. Dugda district is one of the parts of Ethiopian central rift valley(ECRV) that have high fluoride up to 14mg/l in their groundwater source. There are 11 village sized de-fluoridation schemes in Dugda district. Sothe aim of this study was to assess the challenges of utilizing fluoride filtered water, and associated factors, in Ethiopian rift valley, Oromia region, North East Shaw Zone, Dugdadistrict. Methods: A community-based cross-sectional study design complemented with the qualitative study was conducted from April 11-30, 2018Girigorian Colander. A total of 417 head of households were selected randomly for survey questioner interview,and six in-depth interviews were done with different water and sanitation experts at office level and 12 community key informant interview had done. Result:In this study, 56.3% of the studded participants utilized fluoride filtered water for drinking and cooking foods.Household with a family history of no fluorosis problem had a statically significant association with utilizing fluoride filtered water 44.4 times (AOR 44.42, CI, (18.83, 24.74) more likely utilized fluoride filter water as compared to their counterpart. More than three forth 321(79.3%) households prefer to utilize filtered water from the newly established filtering techniques so-called HAP (Hydroxyl Appetite Filter), but in practice only181(44.7%), 47(11.6%) utilizetheir water from HAP and bonechar fluoride filteringtechniques respectively. Conclusion: The results of this study revealed that those H/H utilized community level florid filterwater regularly were less likely affected by fluorosis problem than those H/H not utilized there drinking water from community level florid filter. Accessibility and type of fluoride filtering options were most challenging factors to utilize fluoride filtered water by households.

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Section: Discussionsupporting

confidence: 83%

Assessing the challenges of utilizing fluoride filtered water and its factors, in Ethiopian central rift valley, Dugda district, Oromia region, south west Ethiopia,2019: A cross sectional study.

Alembo

Beyene

Erimias

et al. 2020

Preprint

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“…Fluoride (F), the compound of fluorine (the most active element in the natural environment), exists very extensively in the living environment, for instance, groundwater, soil, food, industrial pollutant, drugs, and dental hygiene products [1,2]. As we all know that F is necessary in lots of physiological activities.…”

Section: Introductionmentioning

confidence: 99%

Dietary High Sodium Fluoride Impairs Digestion and Absorption Ability, Mucosal Immunity, and Alters Cecum Microbial Community of Laying Hens

Miao

Zhu

et al. 2020

Animals

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(1) Background: This study was conducted to investigate the effects of dietary fluoride (F) on tissue retention, digestive enzymes activities, mucosal immunity, and cecum microbial community of laying hens. (2) Methods: Total of 288 37-week-old Hy-Line Gray laying hens with similar laying rate (85.16% ± 3.87%) were adapted to the basal diets for ten days, and then allocated into three groups at random (n = 9, 6, 6 replicates/group). The concentrations of F in the diets were 31.19 (the control group, CON), 431.38 (F400, low-F group) and 1237.16 mg/kg (F1200, high-F group), respectively. The trial lasted for 59 days. (3) Results: Results suggested that F residuals in duodenum responded to dietary F concentrations positively. The activities of amylase, maltase and lactase were decreased in high-F group, compared with those in the control group. The mRNA expression levels of jejunum and ileum secretory immunoglobulin A (sIgA) and Mucin 2, and sIgA concentrations were decreased inhigh-F group, than those in the control group. The observed operational taxonomic units (OTUs) of laying hens in high-F group were higher than the CON and low-F groups, and the bacterial structure was different from the other two groups. The Lactobacillus was higher in the control group, while Gammaproteobacteria, Escherichia-Shigella, Streptococcaceae, and Enterobacteriaceae were higher in the high-F group. (4) Conclusions: The actual results confirmed that dietary high F intake increased the F residuals in duodenum, and reduced the digestion and absorption of nutrients and immunity via decreasing the activities of digestive enzymes, impairing intestine mucosal immunity, and disturbing the cecum microbial homeostasis of laying hens.

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“…However, it has been known for long time that extreme intake of fluoride, at concentrations higher than 1 mg/L, can lead to severe dental and skeletal fluorosis as shown in Fig. 1 (Vithanage and Bhattacharya 2015). Dental and skeletal fluorosis, a disease can cause mottling of the teeth due to the excess fluoride and calcification of ligaments.…”

Section: Introductionmentioning

confidence: 99%

Treatment of fluoride-contaminated water. A review

Kumar¹,

Suganya²,

Srinivas³

et al. 2019

Environ Chem Lett

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Delivering the right amount of fluoride to drinking water protects the teeth from decay and reduces the risk of cavities. Nonetheless, fluorosis has been diagnosed as the result of excessive exposure of fluoride, which induces brain impairment, muscle disorders and hyperactivity. Fluoride ingestion during the formation of the tooth enamel is the main reason for fluorosis, which is characterized by hypomineralization. Dissolution of fluoride-containing rock minerals contributes to naturally occurring fluoride contamination in water. The intentional addition of fluoride to water in dental care is alarming in growing countries such as India. This article reviews the origin of fluoride, the analysis of fluoride derivatives and the technologies to remove fluoride from water. The manuscript presents adsorption techniques for fluoride removal, using different types of adsorbents. The adsorption capacities of adsorbents under various conditions, such as contaminant concentration, adsorbent dosage, time, pH and temperature, are presented. Adsorbent types include alumina, zeolites, organic waste, shell-based and carbon-based including graphite and carbon nanotubes. Defluoridation of water using clays and muds, modified activated alumina, chitosan derivatives and composites are also discussed.

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Fluoride in the environment: sources, distribution and defluoridation

Cited by 247 publications

References 112 publications

Assessing the challenges of utilizing fluoride filtered water and its factors, in Ethiopian central rift valley, Dugda district, Oromia region, south west Ethiopia,2019: A cross sectional study.

Assessing the challenges of utilizing fluoride filtered water and its factors, in Ethiopian central rift valley, Dugda district, Oromia region, south west Ethiopia,2019: A cross sectional study.

Dietary High Sodium Fluoride Impairs Digestion and Absorption Ability, Mucosal Immunity, and Alters Cecum Microbial Community of Laying Hens

Treatment of fluoride-contaminated water. A review

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