(PDF) Fluoride exposure from burning coal-clay in …
The fluorine released from combustion of the coal itself accounts for less than 15% of the total fluorine emissions during the com-bustion of coal-clay, thereby indicating that the fluorine source...
FLUORIDE EXPOSURE FROM BURNING COAL-CLAY IN GUIZHOU ...
Fluoride exposure from burning coal-clay 21 Fluoride 37 (1) 2004 stone 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.
CiteSeerX — FLUORIDE EXPOSURE FROM …
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): SUMMARY: The very high prevalence of dental and skeletal fluorosis in relation to the fluorine content of local coal and clay was investigated in two rural re-gions with low water fluoride (Hualuo Village and Majianzhuang Village) of Guizhou Province, China. The fluorine content of coal in the two regions is con ...
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.
Health effects of fluoride pollution caused by coal …
23.04.2001 · Combustion of coal and coal bricks is the primary source of gaseous and aerosol fluoride and these forms of fluoride can easily enter exposed stone products and the human respiratory tract. Major human fluoride exposure was caused by consumption of fluoride contaminated food, such as corn, chilies and potatoes.
Health Effects of Fluoride Pollution Caused by …
Combustion of coal and coal bricks is the primary source of gaseous and aerosol fluoride and these forms of fluoride can easily enter exposed stone products and the human respiratory tract. Major...
Exposure of Fluoride in Coal Basin - SCIRP Open …
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].
Health effects of indoor fluoride pollution from …
The combustion of high fluoride-content coal as an energy resource for heating, cooking, and stone drying is a major exhaust emission source of suspended particulate matter and fluoride. High concentrations of these pollutants have been observed in indoor …
Health Effects of Exposure to Natural Arsenic in ...
09.01.2007 · Other known routes of As exposure are from stone and air contaminated with As via domestic coal combustion, for example, when chili peppers and corns are dried over an open stove burning As-containing coal (An et al. 1992). China is the world’s largest coal producer and consumer, with vast coal mines located in central China. In addition to arsenicosis, many health problems are …
Fluoride Action Network | Refinement …
03.05.2020 · There was a significant difference in two items of building blocks and decoding between PIQ impairment and normal group (P < 0.05). Children with fluorosis in coal-burning areas had impaired IQ and obviously had impaired VIQ. Thus, the language learning ability should be strengthened in children exposed to fluorosis.
Child Skeletal Fluorosis from Indoor Burning of …
Overall prevalence of child skeletal fluorosis due to indoor burning of coal was 7.5%. Children aged 12–16 years were significantly more likely to be diagnosed with skeletal fluorosis than children aged 7–11 years (OR = 1.84, 95% CI: 1.17–2.90; =.0082).
Refinement Impairments of Verbal-Performance …
There was a significant difference in two items of building blocks and decoding between PIQ impairment and normal group (P < 0.05). Children with fluorosis in coal-burning areas had impaired IQ and obviously had impaired VIQ. Thus, the language learning ability should be strengthened in children exposed to fluorosis.
Health effects of indoor fluoride pollution from …
The combustion of high fluoride-content coal as an energy resource for heating, cooking, and stone 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.
FLUOROSIS – COAL BURNING IN CHINA. – …
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. Coal-burning endemic fluorosis occurs mainly in the ...
Fluoride Action Network | Introduction to the 64 …
Sources of Fluoride Exposure: 56 of the 63 IQ studies involved communities where the predominant source of fluoride exposure was water; nine studies investigated fluoride exposure from coal burning. Fluoride Levels in Water: IQ reductions have been significantly associated with fluoride levels of just 0.7 mg/L (Green 2019); 0.15 to 1.38 mg/L ...
October 2019 THE IMPORTANCE OF TIMING IN FLUORIDE …
fluoride, such as the water supply, and no fluoride pollution from burning coal or other industrial sources, e.g., the villages of Wamiao and Xinhuai in rural China studied by Xiang et al., 2 a higher correlation may be pr esent between intrauterine and later childhood exposure than in societies where multiple fluoride sources are present such as industrial sources, foods high in fluoride ...
Developmental fluoride neurotoxicity: an updated …
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 ].
SKELETAL FLUOROSIS FROM INDOOR BURNING
SUMMARY: The effects of airborne fluoride from unvented indoor burning of fluoride-rich coal on the bones and teeth of residents of two rural villages in SW China were investigated and compared. In the highly polluted village of Xaochang in Sichuan Province, stage III skeletal fluorosis was found in 43 (84%) of 51 examinees.
Child skeletal fluorosis from indoor burning of …
Upon burning, gaseous fluoride and particulate dust-containing fluoride are released from coal briquettes. Ando et al. estimated that only 2% of fluoride exposure was due to inhalation of indoor air in coal- burning households, while 97% of fluoride exposure was due to ingestion of stone dried and stored inside the household . Residents of Zhij ...