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SUMMARY: Data on coalburning endemic fluorosis throughout China and on the exposureresponse 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 ...
home // News // Coal burning having a devastating impact on rural Chinese // Coal burning having a devastating impact on rural Chinese. Source: Agence FrancePresse | April 15th, ... 61 studies have found that elevated fluoride exposure is associated with reduced IQ in humans, while over 60 animal studies have found that fluoride exposure ...
sources of hydrogen fluoride, including coal burning facilities, may ... Occupational Populations Occupational exposure to hydrogen fluoride or fluorine by inhalation exposure may occur in industries involved in the production of fluorine containing chemicals, pharmaceuticals, high .
Skeletal fluorosis among children may contribute to poor health and reduced productivity when they reach adulthood. Further efforts to reduce fluoride exposure among children in southwestern of China where coal is burned indoors are desperately needed.
Sun Fluoride Exposure From Burning Coal Fluoride poisoning is endemic throughout the world. Its prevalence in many parts of China is undisputed, with Guizhou being one of the provinces most seriously affected by the pernicious effects of fluoride poisoning due to the burning of contaminated coal.
Jan 09, 2007· Health outcome of As exposure related to indoor coal usage . Other known routes of As exposure are from food and air contaminated with As via domestic coal combustion, for example, when chili peppers and corns are dried over an open stove burning Ascontaining coal (An et al. 1992). China is the world''s largest coal producer and consumer ...
Fluoride: Benefits And Risks of Exposure 28 · concentrations of fluoride in food associated with water Fluorides in the atmosphere arise from fluoridecontaining dusts, industrial waste, the burning of coal fires, and volcanic gases.
home // News // Special report: Rural villages in China hit by fluorine poisoning from coalburning // Special report: Rural villages in China hit by fluorine poisoning from coalburning. Source: ... while over 60 animal studies have found that fluoride exposure .
to elevated fluoride levels due to human activities, and determine the overall exposure to fluoride. Encourage mothers to breastfeed, even in areas with high fluoride intake, as breast milk is optimal for infant health and usually low in fluoride. Discourage the use of fluoriderich coal for cooking purposes.
1. Introduction. Coal is one of the main fuels used by the rural s in China (Sinton et al., 2004).Hundreds of harmful pollutants, such as gaseous fluoride, sulfur dioxide (SO 2) and suspended particles are emitted during the coal burning (Ando et al., 1998, Dai et al., 2004, Jin et al., 2006).Exposure to indoor air pollution from the combustion of coal can cause many diseases ...
Oct 01, 2012· On further restriction of the model to exclude the 7 studies with arsenic and iodine as coexposures 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 = ...
improper (unvented) coalburning and the widespread use of highfluoride coalclay. Keywords: Chinese coal, Fluoride in coal. INTRODUCTION With a concentration scope of 20–500 mg/kg and an average value at 150 mg/kg, fluorine is one of the abundant trace elements in coal.
Exposure of Fluoride in Coal Basin scirporg. 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 .
Oct 01, 2011· Hydrogen fluoride may be the major cause of coal burning endemic fluorosis ... which always had undergone weathering due to the longterm exposure to .
Ando et al. estimated that only 2% of fluoride exposure was due to inhalation of indoor air in coal burning s, while 97% of fluoride exposure was due to ingestion of food dried and stored inside the . Residents of Zhij in in Guizhou Province cook foodstuffs in the same fashion as residents of Sichuan Province.
production plants, superphosphate plants, coalburning power plants, glassworks and oil refineries, occupational exposure to fluoride levels of about 1 mg/m3 may occur. Various types of coal contain fluoride levels in the range 4–30 g/kg (8,9). In a study conducted in the United States of America,
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 regions with low water fluoride (Hualuo Village and Majianzhuang Village) of Guizhou Province, China. The fluorine content of coal in the two regions is con ...
To mimic the fluoride poisoning of patients in coalburning regions, rats in fluoridetreated groups were fed with standard chows mixed with corn dried by burning coal from endemic fluorosis areas to reach required amount of fluoride (20, 40, or 60 mg/kg). Treatment was continued for 120 days. The rats were then killed and the testes were ...
Whether or not fluoride exposure in later childhood is associated with developmental neurotoxicity may reflect the degree to which later childhood exposure parallels intrauterine exposure. In stable societies with a single source of fluoride, such as the water supply, and no fluoride pollution from burning coal or other industrial sources, ...
VE and locopene reduce urinary fluoride in the established rat model for coal burning fluorosis. To investigate the role of VE and lycopene on the modulation of fluorosisinduced toxic effects, a coal burning fluorosis model of rats was established. Each group of rats were administrated with
Jul 20, 2012· On further restriction of the model to exclude the 7 studies with arsenic and iodine as coexposures 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 = ...
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] .
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].
and no fluoride pollution from burning coal or other industrial sources,, the villages of Wamiao and Xinhuai in rural China studied by Xiang et al., a higher correlation may be present between intrauterine and later childhood exposure than in societies where
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