摘要
应用仪器中子活化(INAA)、电感耦合等离子体原子发射光谱(ICP-AES)和原子吸收光谱(AAS)等方法测定了晋北-宁北一线5对矿井、2个露天矿、5个电厂和3个洗煤厂煤中环境敏感性痕量元素的含量;通过与中国土壤、其他地区煤以及世界范围煤中痕量元素含量进行对比,总结了研究区痕量元素的分布、富集特征,得知部分地区煤中Hg、Cd和Se的含量较高,在燃烧利用过程中可能对环境造成影响。通过分析痕量元素与灰分、挥发分的相关性以及痕量元素间、痕量元素与Al、Fe和Sp的相关、聚类特性,探讨了痕量元素间及其与矿物质间的亲合性及赋存特征。
The concentrations of nineteen environmentally-sensitive trace elements in coal collected from 5 mines, 2 strip mines, 5 power plants and 3 coal washeries from North Shanxi Province to North Ningxia Huizu Autonomous Region are determined using instrumental neutron activation analysis (INAA), inductively coupled plasma atomic emission spectrometry (ICP-AES) and atomic absorption spectrometry (AAS). Comparison with Chinese and world averages and arithmetical means of concentrations in American coals shows that the concentrations of Hg, Se and Cd are higher in some mine coals. The relationships of concentrations with rank, ash yield and pyritic sulfur indicate that: 1) the contents of Mo, Se, Cr, V, Pb and U are correlative with ash yield; 2) the contents of As, Be, Th, Pb, Sb and Zn are correlative with pyritic sulfur; and 3) deposition environment is more important affecting factor than rank. The modes of occurrence of trace elements are determined by indirect method such as relativity analysis and clustering analysis. The results show that Se, Cr, V, U, Mo, Pb and Th are associated to ash yield while Pb, Th and Hg occur mainly in sulfur mineral and U, Mo, Co and P are distributed in clay mineral.
出处
《地球化学》
CAS
CSCD
北大核心
2005年第3期248-256,共9页
Geochimica
基金
中国煤炭地质总局重点科学技术项目(7F0257)
国家自然科学基金(40272071)~~
关键词
煤
痕量元素
地球化学
赋存状态
coal
trace element
geochemistry
mode of occurrence
