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标题:Evaluation of acidity in late Permian outcrop coals and its association with endemic fluorosis in the border area of Yunnan, Guizhou, and Sichuan in China.
时间:2018-12-07 08:28:21
DOI:10.1007/s10653-017-9990-x
PMID:28600727
作者:Xiuping Hong;Handong Liang;Yufa Zhang
出版源: 《Environmental Geochemistry & Health》 ,2017 ,40 (3) :1-17
摘要:Evaluation of acidity in late Permian outcrop coals and its association with endemic fluorosis in the border area of Yunnan, Guizhou, and Sichuan in ChinaThe junction area of Yunnan, Guizhou, and Sichuan provinces is the heaviest coal-...
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目录:
  • Evaluation of acidity in late Permian outcrop coals and its association with endemic fluorosis in the border area of Yunnan, Guizhou, and Sichuan in China
    • Abstract
    • Introduction
    • Materials and methods
      • Study area
      • Sample collection and preparation
      • Analytical methods
        • Determination of total fluorine in coal
        • Determination of pH
        • Determination of sulfate
        • Determination of free moisture in coal
        • Heat treatment of outcrop coals for hydrogen fluoride test
        • Simulation of outcrop coal combustion
      • Calculation of pertinent parameters
        • Calculation of correct acidity
        • Calculation of hydrogen sulfate content
        • Calculation of H2SO4 mist concentration using combustion simulation
    • Results and discussion
      • Total F and water-soluble F content
      • pH
      • Sulfate and total sulfur content in coal
      • Direct analysis of HF release from coal
      • Release of H2SO4 mist in simulated combustion
      • Discussion of the presence of acid in coal
      • Mechanism of hydrogen fluoride release
    • Further discussion
    • Conclusion
    • Acknowledgements
    • References

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