Scholarly record

USE OF PHYTODECONTAMINATION PROCESS IN REGENERATION MEASURES TO DECREASE CONTENT OF UNDESIRABLE MATTERS IN DISCHARGED MINING WATERS OF THE NORTH BOHEMIAN BROWN COAL BASIN

J. Halir

Abstract

The former mine Obr\'ancЕЇ M\'\iru and its inner dump is the area of interest situated in the North-bohemian Brown Coal Basins at the North-western border of the Czech Republic. In the course of the mine opening and continuous operation the hydrogeological conditions of the outer environment were significantly impacted or totally changed by previous long-term, first underground, later opencast coal mining. At the turn of the 20th and 21st century abundant effluents of underground waters with low pH and high contents of dissolved substances, sulphates, manganese and iron were recorded in the Southern part of the residual pit. The waters from these effluents were carried off to the pools of the local pump station and from here pumped to the recipient which is a waste runway of the river Bilina. By changing the valid legislation to stipulate mine waters discharging into recipients it was necessary to comply with the set valid limits. The aforementioned sulphates, manganese and iron were the questionable water quality indicators. In the year 2003 the set of regeneration measures was implemented in the area of interest also using the process of phytodecontamination so the discharged waters would conform to the set quality limits.

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