Arabian Journal of Geosciences

, Volume 6, Issue 11, pp 4109–4118 | Cite as

Leaching capabilities of iodine monochloride (ICl) and diethylenetriamine pentaacetic acid (DPTA) at different concentrations and pH for some major and trace metals from coal and coal fly ash

  • M. Ishaq
  • F. Akbar Jan
  • M. Shakirullah
  • I. Ahmad
  • Hina Ali
Original Paper
First Online:
Received:
Accepted:
  • 137 Downloads

Abstract

In the present study, coal from Chakwal (Pakistan) was leached with an aqueous solutions of iodine monochloride (ICl) and diethylenetriamine pentaacetic acid (DPTA) of different concentrations. The effect of stirring time, concentration and pH was studied on the leaching of different metals from coal. The physicochemical parameters indicated that the coal was of reasonably good quality. The results indicated that with increase in time duration, the extraction of metals increased. In most of the cases, metal concentration increased in the leachate with increasing the concentration of the leaching agents. DPTA was found to be the best leaching agent for most of the metals. Higher extraction of metals from coal fly ash indicated that coal organic matter has a pronounced effect on the leaching. Higher concentration of metals was extracted from virgin coal and coal fly ash at low pH (p > 0.00) as compared to high pH. DPTA extracted metals in higher concentration from virgin coal and coal fly ash at low pH as compared to ICl. Based on the present study, the most leached metals were Fe, Cu, Mn and the least were Pb, Ni, Cd and Cr.

Keywords

Heavy metals DPTA Iodine monochloride (ICl) Leaching Coal 
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Notes

Acknowledgments

The authors would like thank the financial support of Higher Education Commission of Pakistan.

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Copyright information

© Saudi Society for Geosciences 2012

Authors and Affiliations

  • M. Ishaq
    • 2
  • F. Akbar Jan
    • 1
  • M. Shakirullah
    • 2
  • I. Ahmad
    • 2
  • Hina Ali
    • 2
  1. 1.Department of ChemistryAbdul Wali Khan UniversityMardanPakistan
  2. 2.Institute of Chemical SciencesUniversity of PeshawarPeshawarPakistan

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