Southwest fluorosis due to identify

Chinese scientists recently announced that they had found the human central nervous for a long time against fluoride poisoning "the real murderer." The research results at the same time as a coal-fired washing.

Researcher at the Chinese Academy of Sciences Institute of geochemistry, Zheng Bao recently f two geochemistry and Southwest region people's lifestyle and climatic conditions, result in the burning of endemic fluorosis. 　　Previously, it was long believed that fluoride is caused by coal-fired. Zheng Bao found, save in the Interior of the corn and pepper can strongly absorbed concentration in the air of fluorine, and maize and the higher the absorption of water pepper. At the same time, China Southwest warm moist climate conditions, the soil surface are rich in aluminium oxide formed and clay minerals in soil, adhesive layer of rock weathering process released with save and enrichment of the soil in the form of adhesive layer of rich. These are the two types of fluorine geochemistry.

The study found, southwest of coal for pulverized coal combustion, must be enclosed in a binder, and clay clay fluoride levels significantly higher than coal, generally in more than 10 times. In the Southwest warm moist climate conditions, the fluoride content of clay is much greater than elsewhere in the country. Even if the slime in only 20% of clay, in burning clay fluoride release is the same amount of coal dust release 2 times more of fluorine. Therefore, the clay of the fluorine content of fluorine content than coal powder on the prevalence of fluorosis plays a more important role in the control.

Southwest mountains of corn and pepper is the main crop and food, climate, you must use the fire drying and saved in a coal mine fire room, in order to avoid moldy. In this process, corn and pepper absorbed the slime combustion process of fluorine in releases. Used to eating corn and pepper of the local population, resulting in excessive fluoride intake and raised fluorosis.

Southwest area due to historical and natural causes, economic development lags, people lack health awareness are also an important cause of fluorosis.