中国西南地区煤中12种有害微量元素的分布

运用电离耦合等离子体质谱（ICP-Ms）、冷原子吸收光谱（CV-AAs）、离子选择性电极法（ISE）和仪器中子活化分析（INAA），对云南、贵州、四川和重庆127件煤层刻槽样品和石煤样品中主要有害微量元素（包括Be，F，C1，Cr，Th，U，As，Se，Cd，Hg，Tl和Pb）的含量进行了测定．结果表明，中国西南地区煤中明显富集的有害微量元素有云南的As、四川的Cd、三省一市的Cr和Se、四川和重庆的Hg．西南地区三省一市早二叠世煤中富集的有害微量元素有F，Th，U和se，晚二叠世煤中富集的元素有Th，Se和Hg，晚三叠世煤中富集Cl，Th和Hg，第三纪褐煤中富集As．

Distribution of Twelve Toxic Trace Elements in Coals from Southwest China

The content of toxic trace elements,including Be,F,Cl,Cr,Th,U,As,Se,Cd,Hg,Tl,and Pb,in 127 coal and stone coal channel samples from Yunnan,Guizhou,Sichuan,and Chongqing,was determined using inductively coupled plasma mass spectrometry(ICP-MS),cold-vapor atomic absorption spectrometry(CVAAS),ion-selective electrode(ISE),and instrumental neutron activation analysis(INAA).The results show that the coals from Yunnan of Southwest China were enriched in As;coals from Sichuan enriched in Cd;coals from Yunnan,Sichuan,Guizhou,and Chongqing enriched in Cr and Se;coals from Sichuan and Chongqing enriched in Hg.The early Permian coals from Southwest China were enriched in F,Th,U,and Se;the Late Permian coals enriched in Th,Se,and Hg;the Late Triassic coals enriched in Cl,Th,and Hg;the coals from Tertiary coals enriched in As.