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Interfacial interaction of bio-leaching of pyrite mineral

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Abstract

Electrokinetic and contact angle measurements were used to discuss the interfacial interaction on bio-leaching of pyrite mineral. Surface energy parameters of pyrite mineral and thiobacillus ferrooxidans were obtained by calculating according to formula of Young’s equation and contact angle measurements. The results show that surface energy of thiobacillus ferrooxidans is much higher than that of pyrite mineral, and the reaction of pyrite mineral with thiobacillus ferrooxidans causes the reduction of the pyrite surface energy. The interfacial interaction energies between pyrite mineral and thiobacillus ferrooxidans were also obtained based on polar interfacial interaction theory and electrokinetic and contact angle measurements. The thermodynamics approach only considering Lifshitz-van der Waals and Lewis acid-base interaction fails to explain the adhesion behavior of the bacteria, but the extended Derjaguin-Landan-Verwey-Overbeek theory concerning Lifshitz-van der Waals and Lewis acid-base and the electrostatic can exactly predict interfacial interaction.

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Authors and Affiliations

  1. School of Resource Processing and Bioengineering, Central South University, Changsha, 410083, China

    Gu Guo-hua  (顾帼华), Suo Jun  (锁 军) & Qiu Guan-zhou  (邱冠周)

  2. School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China

    Wang Hui  (王 晖) & Hao Ye  (郝 野)

Authors
  1. Gu Guo-hua  (顾帼华)
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  2. Wang Hui  (王 晖)
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  3. Suo Jun  (锁 军)
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  4. Qiu Guan-zhou  (邱冠周)
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  5. Hao Ye  (郝 野)
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Corresponding author

Correspondence to Gu Guo-hua  (顾帼华).

Additional information

Foundation item: Project(2004CB619204) supported by the National Basic Research Program of China; Project(2002) supported by the Teaching and Research Award Program for Outstanding Young Teachers in Higher Education Institutions, China

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Gu, Gh., Wang, H., Suo, J. et al. Interfacial interaction of bio-leaching of pyrite mineral. J. Cent. South Univ. Technol. 15, 49–53 (2008). https://doi.org/10.1007/s11771-008-0011-1

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  • DOI: https://doi.org/10.1007/s11771-008-0011-1

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