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Verification of the "first flush" phenomenon in mine water from coal mines in the Upper Silesian Coal Basin, Poland

Lookup NU author(s): Dr Grzegorz Gzyl, David Banks

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Abstract

Case studies of Grodziec and Siersza mines in the Upper Silesian Coal Basin confirm that mine water accumulating in and overflowing from abandoned coal mines is subject to a "first flush" phenomenon. The accumulated products of sulphide oxidation are dissolved in the rising mine water and flushed out at concentrations several times those observed during mine operation. Following the first overflow, sulphate concentration and hydrogen ion activity decay exponentially. In the case of workings in Siersza, decay constants of -0.003 to -0.005 day 1 are observed, corresponding to flushing times of 480 to 820 days, some 10-20 times the period required for the workings to flood. Quantities of leachable sulphur in the abandoned workings of 0.02-0.03% are adequate to explain the observed concentrations of sulphate in the first flush, and this figure is tentatively supported by laboratory analyses. (c) 2007 Elsevier B.V. All rights reserved.

Publication metadata

Author(s): Gzyl G, Banks D

Publication type: Article

Publication status: Published

Journal: Journal of Contaminant Hydrology

Year: 2007

Volume: 92

Issue: 1-2

Pages: 64-84

ISSN (print): 0169-7722

ISSN (electronic): 1873-6009

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/j.jconhyd.2006.12.001

DOI: 10.1016/j.jconhyd.2006.12.001

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