【摘要】 根据以往研究 ,选取了 2个砷含量差异较大的样品 ,利用连续浸取实验 ,结合仪器中子活化分析 (INAA)、等离子原子吸收光谱 (ICP -AES)、等离子质谱 (ICP -MS)测定及X射线吸收精细结构 (XAFS)分析 ,经低温灰化 (LTA)、扫描电子显微镜 (SEM -EDX)对黔西南高砷煤中砷的赋存状态进行了研究 ,发现 5 0 %以上的砷不能被NH4 Ac、HCl、HF和HNO3 等无机试剂提取出来 ,结合以往的研究认为砷主要以高价有机砷的形式存在 .更多还原

【Abstract】 Based on a previous research, two typical high-As coal samples were conducted on subsequent leaching. Combining with instrument neutron active analyses (INAA), ICP-MS, ICP-AES, X-ray absorption fine structure (XAFS), low temperature ashing, and scanning electron microscopy with X-ray energy disperse analyzer, this paper discusses the occurrence mode of the arsenic in high-As coals from southwestern Guizhou Province. It is proved that more than 50% arsenic cannnot be leached out by NH 4Ac, HCl, HF and HNO 3, and that arsenic mainly exists in the organic (Ⅴ) form.更多还原