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Mercury emission from spontaneously ignited coal gangue hill in Wuda coalfield, Inner Mongolia, China

机译：内蒙古乌达煤田自燃煤石山的汞排放

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摘要

Coal mining waste material (coal gangue) is a serious problem in all coal-producing countries, consuming land resource and posing occupational and environmental hazards. In China alone, coal gangue inventory reaches 4.5-5 Gt, with an annual increase of 0.37-0.55 Gt. Coal gangue is commonly stored as gangue hills and known for the inclination to spontaneous combustion. This study targeted the largest gangue hill with 100 m in height, 2000 m in foot perimeter and a combustion history over 50 years in Wuda coalfield, Inner Mongolia of China a global hot spot for underground coal fire. Lumex RA-915+ portable mercury analyzer was employed in the in-situ real-time measurement of exhaust gas at 46 accessible vents on the gangue hill slope, and a total of 2760 mercury concentration data showed an average mercury concentration of 5908 ng/m(3) (1022-31,750ng/m(3), n = 2760) in the exhaust gas, which is 12.7 times that measured in underground coal fire in the same coalfield. Moreover, an elevated mercury content (43.2 ng/m(3)) was observed in the near-surface air in the vicinity of gangue hill, which is 15-30 times of the atmospheric background level. This findings suggest that the coal gangue may also be an important contributing factor to the global anthropogenic mercury inventory. (C) 2016 Published by Elsevier Ltd.
机译：在所有产煤国中，煤矿废料（煤石）都是一个严重的问题，它消耗土地资源并造成职业和环境危害。仅在中国，煤石库存就达到4.5-5 Gt，每年增加0.37-0.55 Gt。煤石通常被储存为hill石山，并以自燃倾向而闻名。这项研究针对的是中国内蒙古乌达煤田最大的石山，其高度为100 m，周长为2000 m，燃烧历史超过50年，是全球地下煤火的热点。 Lumex RA-915 +便携式汞分析仪被用于煤hill石山坡上46个可到达的排气孔的现场实时废气测量，总共2760个汞浓度数据显示平均汞浓度为5908 ng / m （3）（1022-31,750ng / m（3），n = 2760）的废气，是同一煤田地下煤火的12.7倍。此外，在脉石岗山附近的近地表空气中汞含量升高（43.2 ng / m（3）），是大气本底水平的15-30倍。这一发现表明，煤石也可能是全球人为汞清单的重要贡献因素。 （C）2016由Elsevier Ltd.出版

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  • 来源
    《Fuel》 |2016年第15期|525-530|共6页
  • 作者

    Liang Yanci; Liang Handong; Zhu Shuquan;

  • 作者单位

    State Key Lab Coal Resources & Safe Min, Beijing 100083, Peoples R China|China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China;

    State Key Lab Coal Resources & Safe Min, Beijing 100083, Peoples R China;

    China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mercury emission; Spontaneous combustion; Gangue hill; Wuda;

    机译：汞排放;自燃;G牙山;乌达;

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