| 煤中As赋存状态的逐级化学提取研究 |
| 摘要点击 2886 全文点击 2379 投稿时间：1998-10-20 |
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| 中文关键词 煤 砷 逐级化学提取 赋存状态 |
| 英文关键词 coal arsenic sequential chemical extract occurrence |
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| 中文摘要 |
| 应用5步法逐级化学提取研究了2个烟煤和3个无烟煤样品中微量As(0.66μg/g-5.26μg/g)的赋存状态。研究表明应用逐级化学提取方法可以有效地定量研究煤中微量As的赋存状态;煤中As含量较低时(<5.5μg/g),As仍然有多种赋存状态,当煤灰分(主要是粘土矿物)较低时(<30%)主要是进入有机质中,当灰分较高时(>30%)主要进入粘土矿物晶格 |
| 英文摘要 |
| The occurrence of trace arsenic in two bituminous coals and three anthracite coals was investigated using five-step sequential chemical extract method.The research shows that five-step sequential chemical extract method is efficient in determining the occurrence of trace arsenic in coal quntitatively.There are a variety of occurrence modes of trace arsenic(<5.5μg/g)in coal;arsenic in coal with lower ash(<30%)mainly occurs in organic matter,that with higher ash(>30%) mainly occurs in lattice of clay mineral. |
