| Fluoride exposure in the endemic fluorosis area of Guizhou, China |
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| 作者姓名： | Weiwei LI Yuegang TANG Shifeng DAI |
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| 作者单位： | Department of Resource and Earth Science, China University of Mining and Technology, Beijing 100083, China,＂ Key Laboratory of Coal Resources, Ministryof Education, Beijing 100083, China |
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| 摘 要： | The dental and skeletal fluorosis is highly prevalent in Zhijin, Guizhou, especially at Hualuo Village, Hehua Village and Majiazhuang Village. The contents of fluorine in coal, clay used for coal combustion, mixed fuel of coal and clay, corn, and chili from households of the three villages were determined by the pyrohydrolysis-fluorine ion-selective electrode method. The average contents of fluorine in the above samples respectively are 237 mg/g, 2262 mg/g, 828 mg/g, 1419 mg/g, and 110 mg/g. The clay used for coal combustions is the main fluorine source of endemic fluorosis and the inferior coal and weathered coal are the secondary source of fluorine. During the combustion of mixed fuel of coal and clay, about eighty percent of fluorine was volatilized, approximately two thirds of which was from the clay and the other one third from the coal. The occurrence of fluorine in clay used for coal combustion is closely related to apatite and hornblende. The contents of fluorine in corn and chili, dried by coal-clay mixed fuel are about 1400 and 73 times higher than the permitted level of fluorine in foods according to the Chinese Standard. It is worth paying attention to the high-fluorine indoor surroundings, such as coal, clay, corn, and chili, particularly ash from boiler bottom with the fluorine content of 15738 μg/g. Besides the technologies of fluorine fixation during the combustion,
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| 关 键 词： | 地方病 氟中毒 粘土 煤 贵州 |
Fluoride exposure in the endemic fluorosis area of Guizhou, China |
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| Weiwei LI Yuegang TANG Shifeng DAI.Fluoride exposure in the endemic fluorosis area of Guizhou, China[J].Chinese Journal of Geochemistry,2006,25(B08):70-70. |
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| Abstract: | |
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| Keywords: | endemic fluorosis fluorine coal clay Guizhou |
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