| 云贵川交界区晚二叠世煤中汞形态分析 |
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| 引用本文： | 曹庆一,梁汉东,李春辉,杨柳.云贵川交界区晚二叠世煤中汞形态分析[J].中国环境科学,2019,39(9):3959-3966. |
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| 作者姓名： | 曹庆一 梁汉东 李春辉 杨柳 |
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| 作者单位： | 1. 中国矿业大学(北京)煤炭资源与安全开采国家重点实验室, 北京 100083;
2. 中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083 |
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| 基金项目： | 国家自然科学基金资助项目（41371449）；煤炭资源与安全开采国家重点实验室基金资助项目（SKLCRSM17ZZ01） |
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| 摘 要： | 通过RA-915测汞仪与程序升温热解仪联用，分析了云贵川交界区晚二叠世煤在氩气、氮气和氧气3种不同气氛下的汞释放规律及煤中汞的存在形态.研究表明，煤在还原环境下热解时，汞的释放范围较广，且由于煤中汞的存在形态不唯一而呈现出明显的阶段性释放特征，在氮气和氩气气氛下煤中汞的释放行为接近一致.在氧气气氛下热解时，HgS和HgSO4可能以HgSO4·HgO和HgSO4·2HgO这种过渡形式而使汞的释放温度范围趋于集中.云贵川交界区晚二叠世煤中的汞以HgS和HgSO4为主要存在形态，部分煤样中含有一定量的HgO.
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| 关 键 词： | 云贵川交界区 晚二叠世煤 汞形态 程序升温热解 |
| 收稿时间： | 2019-02-07 |
Analysis of mercury speciations in Late Permian coal from the border area of Yunnan,Guizhou and Sichuan provinces |
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| CAO Qing-yi,LIANG Han-dong,LI Chun-hui,YANG Liu.Analysis of mercury speciations in Late Permian coal from the border area of Yunnan,Guizhou and Sichuan provinces[J].China Environmental Science,2019,39(9):3959-3966. |
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| Authors: | CAO Qing-yi LIANG Han-dong LI Chun-hui YANG Liu |
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| Institution: | 1. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China;
2. College of Geoscience and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China |
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| Abstract: | The Late Permian coal samples were collected from the border area of Yunnan, Guizhou and Sichuan provinces to analyze the mercury release behavior in the different atmospheres (argon, nitrogen and pure oxygen) and the mercury speciations in coal, using RA-915 mercury analyzer combined with temperature programmed pyrolysis instrument. The results showed that when the coal was pyrolyzed in the reducing environment, the release range of mercury was wider, and it showed obvious stage release characteristics due to the multiple mercury speciations. In the nitrogen and argon atmosphere, the mercury release behavior was nearly uniform. When the coal was pyrolyzed in the oxygen atmosphere, HgS, HgSO4 and HgO may be released in the transitional forms of HgSO4·HgO and HgSO4·2HgO, and the mercury release range was relatively concentrated. The mercury speciations in the Late Permian coal from the study area is dominated by HgS and HgSO4, and a certain amount of HgO is present in some coal samples. |
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| Keywords: | the border area of Yunnan Guizhou and Sichuan Late Permian coal mercury speciations temperature programmed desorption |
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