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Health effects of fluoride pollution caused by coal .Deze pagina vertalen

23-4-2001 · 1. Introduction. Fluoride compounds are found in a wide range of concentrations in coal, soil, ground water, sea water, minerals, plants and animals (UNEP/ILO/WHO, 1984, Symonds et al., 1988).Coal is the most abundant fossil fuel resource worldwide, therefore, a huge amount of hazardous chemical components including fluorides have been released into the environment by combustion of coal .

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Health effects of indoor fluoride pollution from .

The combustion of high fluoride-content coal as an energy resource for heating, cooking, and food drying is a major exhaust emission source of suspended particulate matter and fluoride. High concentrations of these pollutants have been observed in indoor .

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Anti-Fluoride Propaganda as News | NeuroLogica .Deze pagina vertalen

There was a lot of variability across the studies, but generally the high fluoride groups were in the 2-10 mg/L range, while the reference low fluoride groups were in the 0.5-1.0 mg/L range (not including the coal burning studies, which had much higher fluoride levels).

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Fluoride - GreenFactsDeze pagina vertalen

Dental fluorosis is a condition that results from the intake of excessive amounts of fluoride during the period of tooth development, usually from birth to approximately 6-8 years of age. It is linked to the excessive incorporation of fluoride into dental enamel and dentine which prevents the normal maturation of the enamel. The severity of this condition ranges from very mild to severe ...

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Fluoride and Arsenic Exposure Impairs Learning and Memory ... · PDF-bestand

air and food during coal burning, such as in Guizhou and Shaanxi. Additionally, the wide use of fluoride-containing toothpastes and mouth washes together with high arsenic in groundwater causes co-exposure to fluoride and arsenic. Combined exposure to fluoride and arsenic may result in more complicated adverse health effects than exposure to ...

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Developmental Fluoride Neurotoxicity: A .Deze pagina vertalen

On further restriction of the model to exclude the 7 studies with arsenic and iodine as co-exposures and fluoride originating from coal burning (thus including only the 9 with fluoride exposure from drinking water), neither age nor year of publication was a significant predictor, and the overall test of covariates was less important (p = 0.062), in accordance with the similarity of ...

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Exposure of Fluoride in Coal Basin - scirpDeze pagina vertalen

Coal is a dirty fuel contaminated with F- and other elements. Several million tons of coal are burnt in Korba basin, central India to generate electricity with pouring fluorine and other elements into the environment. The water is contaminated with F- and other chemicals beyond the permissible limits. The contaminated water is consumed by the human and animals by excreting the balanced ...

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The effect of elemental content on the risk of .Deze pagina vertalen

A study reported that high levels of Cd is a risk factor for fluorosis related to exposure to pollution from coal-burning (Xiao et al., 2009). In this study, there was no significant difference among the contents of Cd an environment and a population exposed to fluoride via coal burning, except in coal.

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Hydrogen fluoride may be the major cause of coal .Deze pagina vertalen

The exact form of fluorine released from coal, however, remains unknown, and to date most studies on coal burning endemic fluorosis have been focused on total fluoride.

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FLUORIDE EXPOSURE FROM BURNING COAL-CLAY IN GUIZHOU ...

Fluoride exposure from burning coal-clay 21 Fluoride 37 (1) 2004 Corn is the staple food, and hot (chili) pepper is the favorite vegetable. The local (low-fluoride) springs provide drinking water for the villagers. There are no other pathogenic fluoride sources in or around the two villages.

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Fluoride in Drinking-water -WHO - Modern GhanaDeze pagina vertalen

While the global prevalence of dental and skeletal fluorosis is not entirely clear, it is known that water is normally the major source of fluoride exposure, with exposure from diet and from burning high fluoride coal also major contributors in some settings.

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Fluoride & IQ: The 50 Studies – FROTDeze pagina vertalen

Sources of Fluoride Exposure: 41 of the 50 IQ studies involved communities where the predominant source of fluoride exposure was water; seven studies investigated fluoride exposure from coal burning. Fluoride Levels in Water: IQ reductions have been significantly associated with fluoride levels of just 0.7 to 1.2 mg/L (Sudhir 2009); 0.88 mg/L among children with iodine deficiency.

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Fluoride in the Environment and Its Metabolism in .Deze pagina vertalen

The distribution of fluoride in the environment is uneven and largely is believed to derive from geogenic causes. The natural sources of fluoride are fluorite, fluorapatite, and cryolite, whereas anthropogenic sources include coal burning, oil refining, steel production, brick-making industries, and phosphatic fertilizer plants, among others.

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Health effects of indoor fluoride pollution from .

The combustion of high fluoride-content coal as an energy resource for heating, cooking, and food drying is a major exhaust emission source of suspended particulate matter and fluoride.

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Health effects of indoor fluoride pollution from .Deze pagina vertalen

The combustion of high fluoride-content coal as an energy resource for heating, cooking, and food drying is a major exhaust emission source of suspended particulate matter and fluoride. High concentrations of these pollutants have been observed in indoor air of coal-burning families in some rural areas in China.

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Skeletal Fluorosis (Symptoms ... - Truth About .Deze pagina vertalen

20-3-2020 · The total amount of ingested fluoride is the leading factor which determines the development and progression of skeletal fluorosis().. With fluoride being a cumulative toxin, the more you ingest, the more accumulates in your body. In addition, fluoride exposure from any source or the combination of- can lead to skeletal fluorosis.

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Developmental fluoride neurotoxicity: a systematic .Deze pagina vertalen

Fluoride exposure was mostly through drinking water, but three studies assessed exposure due to coal burning. The Rural Chinese version of the Combined Raven Test (CRT-RC) and other Raven tests (to measure reasoning ability) were the most commonly used outcome measure; IQ tests and the Wechsler intelligence test were also used.

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Liveleak - Fluoride in Water Linked to Lower .Deze pagina vertalen

The authors eliminated both lead exposure and iodine deficiency as possible causes for the lowered IQs. They also excluded any children who had a history of brain disease or head injury and none drank brick tea, known to contain high fluoride levels. Neither village is exposed to fluoride pollution from burning coal or other industrial sources.

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Health Effects of Direct or Indirect Fluoride .Deze pagina vertalen

The other sources of fluoride are tea, some mineral waters, fluoridated milk, fishes, fluoridated salt, fluoridated dental products, vegetables arising from contaminated soils, and air pollution due to the coal burning.

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Fluorides, Hydrogen Air Fluoride, and Fluorine · PDF-bestand

contain fluoride have plasma levels < 1 mcmol/L. Biomarkers Serum and urinary fluoride levels are the most useful biomarkers of fluoride exposure; measurement should be rapid elimination of fluoride Environmental Levels . Air Hydrogen fluoride levels in ambient air ranged from 1.0 to 7.5 µg/m. 3. Sediment and Soil Concentrations of fluoride in ...

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