Now showing items 1-4 of 4

    • A three-dimensional nanoscale study in selected coal mine drainage 

      Silva, Luis F. O.; Crissien, Tito J.; Milanés Batista, Celene; Hoffmann Sampaio, Carlos (2020-06-01)
      Article
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      Sediments from coal mine drainages (CMDs) contain large quantities of suspended pollutants (possibly numerous chemical substances) along with sulfates and hazardous elements (e.g., chromium, zinc, copper, lead) that ...
    • Nanometric particles of high economic value in coal fire region: opportunities for social improvement 

      Silva, Luis F. O.; Crissien, Tito J.; Schneider, Ismael L.; Blanco, Érika P.; Hoffmann Sampaio, Carlos (2020-05-20)
      Article
      Restricted access - publisher's policy
      Spontaneous coal combustion in the La Guajira coals was studied for the presence of carbon nanophases (e.g., carbon nanotubes), occurrence of rare earth elements (REEs) in them, and the probable mechanisms for concentration ...
    • Occurrence of carbon nanotubes and implication for the siting of elements in selected anthracites 

      Silva, Luis F. O.; Crissien, Tito J.; Hoffmann Sampaio, Carlos; Howe, James C.; Dai, Shifeng (2020-03-01)
      Article
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      Petrographic, geochemical, and electron microbeam investigations of selected anthracites and anthracite-rank coaly shales were conducted. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites show an enrichment in ...
    • Rare earth elements and carbon nanotubes in coal mine around spontaneous combustions 

      Silva, Luis F. O.; Crissien, Tito J.; Tutikian, Bernardo F.; Hoffmann Sampaio, Carlos (2020-04-20)
      Article
      Restricted access - publisher's policy
      Increasing population growth and rise global energy petition have made congregation the requests of energy generation and safety a major challenge global. In another hand nanogeoscience is commencing to develop a viable ...