期刊名称：International Journal of Environmental Science and Development
印刷版ISSN：2010-0264
出版年度：2016
卷号：7
期号：1
页码：65-68
DOI：10.7763/IJESD.2016.V7.742
摘要：AbstractIn India coal-based thermal power plants have been a major source of power generation, where 75% of the total power obtained is from coal-based thermal power plants. These plants produce enormous quantity of fly ash. Many of the elements contained in ash are possessing health or environmental risks. In many applications, fly ash is exposed to natural fluids, such as acid rain and groundwater. A portion of fly ash produces by these plants is ultimately dumped in the ash dykes in the form of slurry. This slurry contain various metal ions out of which the ions of concern are Hg, Cr, As, Ni, Cd, Cu, Pb, Zn, and B which may percolate down & pollute ground water. This study investigates the leachate potential of heavy metal for fly ash of one of the Super Thermal Power Plant in India. It also studies the impact of leaching of toxics from ash dumps to water bodies within an area falling in 10 Km radii of ash dumps. The results shows that 5-30% toxic elements (As, Cu, Pb, Mg, Al) are leached in test and around 10% of total Cd was solubilized in the acidic pH range (3 to 5). This study also observed that some heavy metals, trace elements and fluoride in ground water and surface water are present in such quantity which is not desirable in drinking water for direct use as per WHO standards. Thus the study concludes that fly ash has moderate polluting effect on ground water in area which comes under radii of 4 Km where proper treatment of water is required before utilizing it as a drinking purpose.
