Mercury, one of the most toxic of the heavy metals, is widely considered to be amongst the highest priority environmental pollutants in recent years due to its extremely toxic effects and its tendency to bioaccumulate through the food chain (USEPA,2000,2003; Milena et al.,2003). Although mercury is one of the least abundant elements in coal and difficult to accurate its assays, for example, the new mercury Clarke value for hard coal and brown is 0.10±0.01μg/g, and this value would change with the number of mercury content studies increasing (Yudovich and Ketris,2005), the significant portion of the anthropogenic releases of mercury has entered into the environment due to huge amount of coal combustion (Nriagu and Paeyna,1988; Slemr and Langer,1992; Toole-O'Neil et al.,1999; Jozef et al.,2003).
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机译：汞是重金属中毒性最高的一种，由于其极高的毒性作用和在食物链中生物积累的趋势，近年来被广泛认为是最优先的环境污染物之一（USEPA，2000，2003; Milena et al。等人，2003）。尽管汞是煤中含量最少的元素之一，并且难以准确测定其含量，例如，硬煤和褐煤的新汞克拉克值为0.10±0.01μg/ g，并且该值会随着汞含量的变化而变化。越来越多的研究（Yudovich和Ketris，2005），由于大量的煤炭燃烧，大量的人为汞排放进入了环境（Nriagu和Paeyna，1988; Slemr和Langer，1992; Toole-O'Neil等）等人，1999;约瑟夫（Jozef）等人，2003）。
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