燃煤电厂中微量元素迁移释放研究

基于原煤、飞灰及底灰的测试分析，对晋北一家燃煤电厂中硫等43种元素向环境的迁移释放作了定量研究，结果表明：Al等30种元素基本留在固体燃煤产物中；As等10种元素部分留在固体燃煤产物中，部分挥发到大气中；元素Br、Hg及硫基本挥发到大气中；各元素的挥发程度与自身的赋存状态及地球化学性质等有关。

Study on the mobility and release of trace elements in coal-fired power plant

Based on the analyses of the samples of raw coal,fly ash and bottom ash collected from a power plant from the Northern Shanxi,China,the mobility and emission of sulfur and 42 other elements in these samples were studied quantitatively.The results indicated that:Al and 29 other elements were primarily retained in solid combustion residues;As,Be,Cd,Na,Nb,Ni,P,Pb,Sb and Se were only partially retained in solid combustion residues and partially emitted to the atmosphere;Hg,Br and S were primarily emitted to the atmosphere;the volatile degree of the elements are controlled by their occurrence and geochemistry properties etc.;the mean concentrations of S,Hg and Be emitted form the power plant were calculated theoretically and exceed maximum limit of atmosphere environment standard,and more attention should be paid to them.