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Thermodynamic and kinetic parameters of ofloxacin adsorption from aqueous solution onto modified coal fly ash

  • Physical Chemistry of Surface Phenomena
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Abstract

Batch adsorption experiments were carried out for the removal of ofloxacin from aqueous solution using modified coal fly ash as adsorbent. The effects of various parameters such as contact time, initial solution concentration and temperature on the adsorption system were investigated. The optimum contact time was found to be 150 min. The adsorption isotherm data fit well with the Langmuir model, and the kinetic data fit well with the pseudo-second order and the intra-particle diffusion model. Intra-particle diffusion analysis demonstrates that ofloxacin diffuses quickly among the particles at the beginning of the adsorption process, and then the diffusion slows down and stabilizes. Thermodynamic parameters such as ΔG, ΔH, and ΔS were also calculated. The negative Gibbs free energy change and the positive enthalpy change indicated the spontaneous and endothermic nature of the adsorption, and the positive entropy change indicated that the adsorption process was aided by increased randomness.

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References

  1. P. Kay, P. A. Blackwell, and A. B. A. Environ. Pollut. 134, 333 (2005).

    Article  CAS  Google Scholar 

  2. W. Baran, J. Sochacka, and W. Wardas, Chemosphere 65, 1295 (2006).

    Article  CAS  Google Scholar 

  3. L. J. Alemany, M. C. Jimenez, M. A. Larrubia, et al., Adsorpt. Sci. Technol. 6, 527 (1996).

    Google Scholar 

  4. N. Singh, J. Hazard. Mater. 168, 233 (2009).

    Article  CAS  Google Scholar 

  5. M. Balsamo, F. Di Natale, A. Erto, et al., Desalination 263, 58 (2010).

    Article  CAS  Google Scholar 

  6. S. B. Wang, Q. Ma, Z. H. Zhu, et al., Fuel 87, 3469 (2008).

    Article  CAS  Google Scholar 

  7. Q. F. Wu, Z. H. Li, H. L. Hong, et al., Appl. Clay Sci. 50, 204 (2010).

    Article  CAS  Google Scholar 

  8. M. S. Diaz-Cruz, M. J. L. de Alda, and D. Barcelo, Anal. Chem. 22, 340 (2003).

    CAS  Google Scholar 

  9. H. Gaboriau and A. Saada, Chemosphere 44, 1633 (2001).

    Article  CAS  Google Scholar 

  10. M. Alkan, O. Demirbas, S. Celikcapa, et al., J. Hazard. Mater. 116, 135 (2004).

    Article  CAS  Google Scholar 

  11. V. K. Gupta and I. Ali, J. Colloid Interf. Sci. 271, 321 (2004).

    Article  CAS  Google Scholar 

  12. G. C. Zhang and Z. H. Fei, Ion Exch. Adsorpt. 18, 536 (2002).

    CAS  Google Scholar 

  13. V. K. Gupta, A. Mittal, L. Krishnan, et al., Sep. Purif. Technol. 40, 87 (2004).

    Article  CAS  Google Scholar 

  14. M. Ugurlu, Micropor. Mesopor. Mater. 119, 276 (2004).

    Article  Google Scholar 

Download references

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Authors and Affiliations

  1. College of Chemical Engineering, Zhengzhou University, Zhengzhou, 450002, China

    C. -L. Zhang, F. Zhao & Y. Wang

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  1. C. -L. Zhang
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  2. F. Zhao
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  3. Y. Wang
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Correspondence to C. -L. Zhang.

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Zhang, C.L., Zhao, F. & Wang, Y. Thermodynamic and kinetic parameters of ofloxacin adsorption from aqueous solution onto modified coal fly ash. Russ. J. Phys. Chem. 86, 653–657 (2012). https://doi.org/10.1134/S0036024412040346

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  • DOI: https://doi.org/10.1134/S0036024412040346

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