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fluoride exposure from burning coal

Sun Fluoride Exposure From Burning Coal

Sun Fluoride Exposure From Burning Coal. 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.get price

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(PDF) Fluoride exposure from burning coal-clay in Guizhou

Data on coal-burning endemic fluorosis throughout China and on the exposure-response relationship between concentrations of fluoride determined in coal samples and the prevalence of dentalget price

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fluoride e posure from burning coal

FLUORIDE EXPOSURE FROM BURNING COAL-CLAY IN GUIZHOU Fluoride exposure from burning coal-clay 23 Fluoride 37 (1) 2004 Table 2. Dental fluorosis among 8- to 12-yeget price

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CiteSeerX — FLUORIDE EXPOSURE FROM BURNING COAL

fluoride exposure burning coal-clay fluorine content rural re-gions skeletal fluorosis total fluorine emission high prevalence majianzhuang village local coal low water fluoride hualuo village total fluorine content fluorine source guizhou provinceget price

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FLUORIDE EXPOSURE FROM BURNING COAL-CLAY IN GUIZHOU

Fluoride exposure from burning coal-clay 23 Fluoride 37 (1) 2004 Table 2. Dental fluorosis among 8- to 12-year-old children in Hualuo and Majiazhuang villages in Zhijin County, Guizhou Province, China (individual prevalence percentages in parentheses) Village Age No.of examinees Normal Very mild Mildget price

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Fluoride Action Network coal

Fluoride exposure from burning coal-clay in Guizhou Province, China. Sunday, February 16th, 2014 [Exploration for an early discriminant model of non-skeletal phase in endemic fluorosis exposed to coal-burning]. Friday, February 7th, 2014get price

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Exposure of Fluoride in Coal Basin SCIRP Open Access

Coal is a dirty fuel contaminated with toxic elements at the traces [1] [2] . The fluoride content in the coals is ranged from 20 500 mg/kg [3] . The environments in coal burning areas were severely contaminated with F − and other toxicants [4] -[9] .get price

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FLUOROSIS COAL BURNING IN CHINA. Fluoridation

SUMMARY: Data on coal-burning endemic fluorosis throughout China and on the exposure-response relationship between concentrations of fluoride determined in coal samples and the prevalence of dental fluorosis reported from 17 representative surveillance stations in Southwest China were used to estimate the safety threshold for coal fluoride.get price

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Health effects of indoor fluoride pollution from coal

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.get price

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fluoride exposure from burning coal Marc Verschelde

Exposure of Fluoride in Coal Basin,The exposure assessment,Chen, X, Hong, Z and Cao, S (2001) Health Effects of Fluoride Pollution caused by Coal Burning. Fluoride exposure from burning coal get price

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Fluoride Action Network Refinement Impairments of

3-5-2020· Abstract. To explore the relationship between total intelligence quotient (IQ), verbal intelligence quotient (VIQ), performance intelligence quotient (PIQ), and fluoride exposure in children aged 8–12 years in coal-burning fluorosis area of Dafang County, Guizhou Province, China.get price

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Fluoride Action Network coal

Fluoride exposure from burning coal-clay in Guizhou Province, China. Sunday, February 16th, 2014 [Exploration for an early discriminant model of non-skeletal phase in endemic fluorosis exposed to coal-burning]. Friday, February 7th, 2014get price

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Health Effects of Fluoride Pollution Caused by Coal Burning

Request PDF Health Effects of Fluoride Pollution Caused by Coal Burning Recently a huge amount of fluoride in coal has been released into indoor environments by the combustion of coal andget price

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Health effects of fluoride pollution caused by coal burning

23-4-2001· The total fluoride exposures from contaminated food consumption in control area, moderate fluorosis area and severe fluorosis area were 2.99±1.64 mg/day per person, 14.4±6.2 mg/day per person and 43.2±43.2 mg/day per person, respectively ().Direct inhalation accounted for 1.9–3.4% of total fluoride dose, 94.5–97.3% of total fluoride exposure was caused from dietary food get price

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FLUOROSIS COAL BURNING IN CHINA. Fluoridation

SUMMARY: Data on coal-burning endemic fluorosis throughout China and on the exposure-response relationship between concentrations of fluoride determined in coal samples and the prevalence of dental fluorosis reported from 17 representative surveillance stations in Southwest China were used to estimate the safety threshold for coal fluoride.get price

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link.springer

To explore the relationship between total intelligence quotient (IQ), verbal intelligence quotient (VIQ), performance intelligence quotient (PIQ), and fluoride exposure in children aged 8–12 years in coal-burning fluorosis area of Dafang County, Guizhou Province, China. The Wechsler Intelligence Scale for Children Revised in China (WISC-CR) was used to test the total IQ, VIQ, and PIQ in 99get price

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Developmental fluoride neurotoxicity: an updated review

19-12-2019· Of note, fluoride exposure was accompanied by other contaminants from coal burning in some studies [96, 99, 101, 102]. Four studies used the degree of dental fluorosis as exposure parameter, and three of them reported a clear negative association with IQ [ 100,103,107 ], although statistical significance was not reached in one study [ 102 ].get price

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Developmental Fluoride Neurotoxicity: A Systematic

20-7-2012· 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 ofget price

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Status of industrial fluoride pollution and its diverse

23-2-2016· Hydrofluorosis in humans and domestic animals is a worldwide health problem and caused by a prolonged period of fluoride exposure through drinking of fluoride contaminated water. But in recent years, due to rapid industrialization in India, diverse serious health problems among industrial workers and residents and domestic animals living in the industrial areas due to fluoride pollution are get price

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Status of industrial fluoride pollution and its diverse

23-2-2016· Hydrofluorosis in humans and domestic animals is a worldwide health problem and caused by a prolonged period of fluoride exposure through drinking of fluoride contaminated water. But in recent years, due to rapid industrialization in India, diverse serious health problems among industrial workers and residents and domestic animals living in the industrial areas due to fluoride pollution are get price

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Developmental Fluoride Neurotoxicity: A Systematic

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 ofget price

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Health effects of fluoride pollution caused by coal burning.

1-4-2001· Combustion of coal and coal bricks is the primary source of gaseous and aerosol fluoride and these forms of fluoride can easily enter exposed food products and the human respiratory tract. Major human fluoride exposure was caused by consumption of fluoride contaminated food, such as corn, chilies and potatoes.get price

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Health Effects of Indoor Fluoride Pollution from Coal

is a main source of fluoride exposure, it is necessary to reduce airborne fluoride and food contami-nation to prevent serious fluorosis in China. Key words: air pollution, bone formation, bone resorption, coal burning, dental fluorosis, fluoride, indoor pollution, skeletal fluorosis. Environ Health Perspect 106:239-244 (1998). [Online 27 Marchget price

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link.springer

To explore the relationship between total intelligence quotient (IQ), verbal intelligence quotient (VIQ), performance intelligence quotient (PIQ), and fluoride exposure in children aged 8–12 years in coal-burning fluorosis area of Dafang County, Guizhou Province, China. The Wechsler Intelligence Scale for Children Revised in China (WISC-CR) was used to test the total IQ, VIQ, and PIQ in 99get price

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Exposure of Fluoride in Coal Basin SCIRP Open Access

Coal, Fluoride, Contamination, Toxicity 1. Introduction Coal is a dirty fuel contaminated with toxic elements at the traces [1] [2]. The fluoride content in the coals is ranged from 20 500 mg/kg [3]. The environments in coal burning areas were severely −contaminated with F and other toxicants [4]-[9].get price

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INADEQUATE OR EXCESS FLUORIDE: A MAJOR PUBLIC HEALTH

Most airborne fluoride in urbanized areas comes from industrial sources. Key sources include the production and use of phosphate fertilizers and phosphate ores, as well as aluminum, steel and i other metal production facilities. Other sources include glassworks, bricks, ceramics and adhesives 4manufacturing and the burning of coal rich in fluoride.get price

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Fluoride & IQ: The 50 Studies FROT

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.get price

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WHO New WHO report tackles fluoride in drinking-water

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.get price

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Fluorides, Hydrogen Air Fluoride, and Fluorine

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 inget price

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