矿物燃料中的痕量不纯物及其在环境中的降落物,日渐引起全民的关注。关注的范围为排放入大气中的有毒物质、洗煤厂的废液的灰汁及煤灰废物以及处理废料达到环境保护所能容许的程度。环境保护最关心的是排放于大气中硫的氧化物以及氮的氧化物和有毒元素,如砷、 Trace impurities in fossil fuels and their fall in the environment, has aroused the public’s concern. The areas of concern are toxicant emissions to the atmosphere, ash and coal ash waste from coal-washing plant waste, and waste treatment to the extent that environmental protection permits. Environmental protection is most concerned about the emissions of sulfur oxides in the atmosphere and nitrogen oxides and toxic elements such as arsenic,