%0 Journal Article
%T Content and Distribution of Fluorine in Chinese Coals<br>中国煤中氟的含量及其分布
%A WU Dai-she
%A ZHENG Bao-shan
%A TANG Xiu-yi
%A WANG Yan
%A LIU Xiao-jing
%A HU Jun
%A Finkelman RB
%A <br>吴代赦
%A 郑宝山
%A 唐修义
%A 王燕
%A 刘晓静
%A 胡军
%A Finkelman RB
%J 环境科学
%D 2005
%I 
%X Nationwide sampling program is designed according to the resources distribution and coal-forming periods as well as coal rank and yield of coal in China, and 305 coal samples were collected from 26 provinces, municipalities and autonomous regions. Fluorine in coal is determined by pyrohydrolysis / fluoride-ion selective electrode method. Fluorine in coals is mainly of an inorganic nature. Coal rank has no effect on fluorine content. The influence of a factor, such as geological age, on fluorine contents might be concealed by other factors, more research should be done to discern it. The distribution of fluorine in each province, municipality and autonomous region's coals is studied, and the fluorine source in coal-burning endemic fluorosis areas should be estimated over again. The contents of fluorine in Chinese coals show logarithm normal distribution, and 90% of values ranged from 47mg/kg to 347mg/kg, the average fluorine content in Chinese coals was designated as the geometric mean, 136mg/kg. Fluorine in Chinese coals is within the world coal's range.
%K coal
%K fluorine
%K average content
%K distribution<br>煤
%K 氟
%K 全国平均值
%K 分布
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=8B3D2F545AA8F373&yid=2DD7160C83D0ACED&vid=96C778EE049EE47D&iid=CA4FD0336C81A37A&sid=DF92D298D3FF1E6E&eid=708DD6B15D2464E8&journal_id=0250-3301&journal_name=环境科学&referenced_num=13&reference_num=29