Vat leaching of bulk mineral matter from some Pakistani coals. effect of leachant concentration. | [Journal of Chemical Society of Pakistan • 2003]

Author(s):

1. I. Ahmad: Department of Chemistry, University of Peshawar, Peshawar, Pakistan

2. M. A. Khan: Department of Chemistry, University of Peshawar, Peshawar, Pakistan

3. M. Shakir-Ullah: Department of Chemistry, University of Peshawar, Peshawar, Pakistan

4. M. Ishaq: Department of Chemistry, University of Peshawar, Peshawar, Pakistan

Abstract:

Effect of leachant concentration on mineral depletion in some Pakistani coals was studied varying the concentration of leachants i.e. Ammonium acetate, HCI, HNO3 and HCI followed by HF followed by HCl. The extracts as well as the residual coal samples were analyzed for inorganic elements i.e. Fe, K, Na and Ca+Mg (combined). Amongst the metals studied, Fe and Ca+Mg have been extracted significantly compared with the extraction of Na and K. Complete mineral depletion in any case was not achieved even when extraction was performed with high concentration of either of the leachants. Leachability of some metals has been found concentration dependent while other exhibited deviation.

Page(s): 289-294

DOI: DOI not available

Published: Journal: Journal of Chemical Society of Pakistan, Volume: 25, Issue: 4, Year: 2003

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