煤中有害元素的研究现状及其对环境保护的意义

本文给出了煤中有害微量元素的定义，即煤中含量小于１．０％的有毒元素，致癌元素，腐蚀性元素，放射性元素以及其它对环境有害的元素等。根据我国环保要求，提出当前应重视的有害元素，共２２种。作者还讨论了煤中有害微量元素对对环境的危害以及国内外对煤中微量元素的研究现状和存在的问题。

RECENT ADVANCE OF STUDY ON HAZARDOUS ELEMENTS IN COAL AND SIGNIFICANCE FOR ENVIRONMENTAL PROTECTION

this paper gives the definition of hazardous trace elements in coal, namely, the hazardous trace elements coal contain toxic cancer - inducing, corrosive, radioactive elements, of which concentrations are less than 1.0% . According to this definition, the hazardous trace elements in coal should refer to fluorine, chlorine, cadmium, mercury, chromium, lead, arsenic, beryllium, nickel, thorium, uranium, antimony, tellurium, germanium, tin, gallium, indium, polonium, which has not been found in coal (Finkelman, 1994), radium, strontium, barium, lithium, the number of which are 22.However, in view of environmental protection, current concern hazardous elements include As, Cr, Pb, Hg, Cd, Sb, Se, Mn, Ni, Cu,Zn, Cl, F, Mo, Co, Ba, V, Ag, Th, U, Be, B, Br, Li, Na, which amount to 25. Hence, taking into consideration of theoretical harm and current concern of environment , we should put emphasis on these elements: As, Cd, Pb, Hg, Cd, Se, Mn, Ni, Cu, Zn, Sb, Co, Mo,Tl,Be,F,Cl,V,Ba,Th,U,Ag,which amount to 22.At last,the authors also discussed the significance of study on hazardous elements in coal to environmental protection, also reviewed recent advance and problem of study on hazardous elements in coal.