Abstract
We investigated potential contamination of surface and ground water due to placement of fly ash in an abandoned area of an active opencast mine. Leachates from the fly ash and pond ash did not exceed the effluent discharge limits for inland surface water. Even though iron was one of the major components of the ash, it did not exceed 0.3 mg/L in the leachates. Water quality studies carried out at the coal mine indicated that fly ash disposal there, was not affecting the groundwater, but that the water discharged from the active portion of the mine contained high concentrations of total hardness, total dissolved solids (TDS), sulphate, manganese, and iron, exceeding India’s effluent discharge limits. The nearby Ajay River was not contaminated but the confluence point where the mine water met the Ajay River contained high levels of TDS, sulphate, and manganese. Groundwater in the area surrounding the mine was not significantly impacted. Multivariate statistical analysis was carried out to determine the relationships between the different water quality parameters.
Published Version
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