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Coal – Mycobacterium phlei Interaction and its Effect on Coal Cleaning

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Published/Copyright: November 7, 2013
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Tenside Surfactants Detergents
From the journal Tenside Surfactants Detergents Volume 50 Issue 6

Abstract

The adsorption of micro-organisms can be used in separation of valuable minerals from their gangue minerals. The coal is one of the important sources of energy. Most of the coal deposits are low rank coals that contain sulfur compounds and mineral matters which release harmful and toxic gases while burning of coal. In the current study, the interaction of Mycobacterium phlei (M. phlei) with coal was characterized with several techniques such as zeta potential, adsorption kinetics, adsorption isotherms and Fourier Transform InfraRed (FT-IR). In addition, the M. phlei was tested for sulfur and ash removal from coal. The results of surface characterization indicated that the optimum pH was 2–4 where the M. phlei is physically adsorbed to coal particles due to slight electrostatic interactions as well as the hydrophobic interaction. The M. phlei increases the coal separation selectivity from its associated impurities and reduces the total sulfur and ash to 0.9%and 2.1%, respectively.

Kurzfassung

Man kann die Adsorption von Mikroorganismen nutzen, um Industriemineralien von ihren Gangerzen abzutrennen. Kohle ist eine der wichtigsten Energiequellen. Die meisten Kohlelagerstätten bestehen aus minderwertiger Kohle, die Schwefelverbindungen und Mineralien enthält, die gesundheitsschädliche und giftige Gase während der Verbrennung abgeben. In der vorliegenden Untersuchung wird die Wechselwirkung des Mycobacterium phlei (M. phlei) mit Kohle mit verschiedenen Techniken wie z.B. mit der Bestimmung des Zetapotentials, der Adsorptionskinetik, der Adsorptionsisothermen und mit der Fourier-Transform-Infrarotspektroskopie (FT-IR) dargestellt. Des Weiteren wurde die Entfernung von Schwefel und Flugasche aus Kohle durch das Mycobacterium phlei untersucht. Das Ergebnis der Oberflächenunterschung zeigte, dass der optimale pH-Wert bei 2–4 liegt, wo das Mycobacterium phlei physikalisch an den Kohlepartikeln aufgrund der geringen elektrostatischen Wechselwirkungen sowie der hydrophoben Wechselwirkung adsorbiert ist. Das Mycobacterium phlei steigert die Selektivität der Kohleabtrennung von den begleitenden Verunreinigungen und reduziert den Gesamtschwefel- und den Aschegehalt aus 0,99% bzw. 2,1%.

Key words:: Adsorption; bacteria; coal; Mycobacterium phlei (M. phlei); bioflotation
Stichwörter:: Adsorption; Bakterien; Kohle; Mycobacterium phlei (M. phlei); Biomasse
3Dr. Ayman A. El-Midany, Cairo University, Mining, Petroleum and Metallurgy Dept., Cairo, Egypt. E-Mail:

Ayman El-Midany: Associate Professor at Cairo University, Egypt

Ayman El-Midany was graduated from Mining Engineering – Cairo University in 1991. He received his M.Sc. from the same university in 1997. Dr. El-Midany has got his PhD in 2004 from Material Science and Engineering – Florida University, USA. He has various teaching and research interests in the fields of Mineral processing, applied surface and colloid chemistry, chemical metallurgical and environmental engineering. He has published several papers on Interfacial phenomena and its applications in solid/liquid/gas separation. He participated in different industrial projects related to mining and mineral industries either international or local projects.

Mohamed A. Abdel-Khalek: Associate Professor at the Central Metallurgical R&D Institute, EgyptHe has a good experience in physical and mechanical treatment of minerals. He has various research interests in upgrading of minerals using physical separation techniques. He has also a wide experience in the fields of Mineral processing, applied surface and colloid chemistry, coal flotation, treatment of minerals by bacteria (biobeneficiation) especially bioflotation and bioflocculation.

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Received: 2012-06-02
Revised: 2012-10-17
Published Online: 2013-11-07
Published in Print: 2013-11-15

© 2013, Carl Hanser Publisher, Munich

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https://doi.org/10.3139/113.110273
Keywords for this article
Adsorption; bacteria; coal; Mycobacterium phlei (M. phlei); bioflotation

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Abstracts
  4. Abstracts
  5. Application
  6. Water-Dilutable Biocompatible Microemulsion Systems: Design and Characterisation
  7. Coal – Mycobacterium phlei Interaction and its Effect on Coal Cleaning
  8. Novel Surfactant
  9. Synthesis and Properties of N,N′-Bis(Sodium Lauryl Acyl Proyl Acid) Ethylenediamine
  10. Physical Chemistry
  11. Research of Surface Chemical Properties and Micellization Behavior of Sodium N-Lauroylglycine
  12. Synergistic Effects Between Sulfo-betain Zwitterionic Surfactant and Alcohol Ether Sulfate
  13. Research on the Emulsifying Ability of Surfactants in Crude Oil
  14. Selection of Promoter and Micellar Catalyst for Chromic Acid Oxidation of Tartaric Acid in Aqueous Medium at Room Temperature
  15. Synthesis
  16. Oligomerization of Glycerol on Layered Sodium Silicate Catalysts
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