International Journal of Applied Research
Vol. 2, Issue 6, Part I (2016)
Heavy metals in fly ash and carbon dioxide sequestration by plants of ash ponds
Fly ash is a by-product of coal dependent power generation plants which produces 71% of total electricity in India. It is estimated that 300 MT of fly ash will be generated by the end of 2017 (Maiti et al.
2016). The ash is disposed as ash ponds, landfills and slag heaps and is a serious environmental concern. The colour of fly ash depends upon the chemical and mineral constituents and may be dark gray to black due to high amount of unburned carbon.
Fly ash contains the more of the oxides of Si, Al, Fe, and Ca; it also contains lesser amount of of Mg, Na, K, Zn, and S, and several trace elements. The latter constitute the toxic metals with have hazardous impact on terrestrial and aquatic life including man from surface to ground level. The leachability of toxic elements depends upon several factors. The various leaching experiments and their analyses with results are discussed.
It is studied how the vast ash-sites could be rejuvenated for greenery; reduce environmental hazards and reclamation of the land for various agro-based farming. Comparative growth prolificacy of plants and reduction in time for reuse of lands are discussed.
How to cite this article:
Biswajit Mukhopadhyay, Tushar Kanti Mukherjee. Heavy metals in fly ash and carbon dioxide sequestration by plants of ash ponds. Int J Appl Res 2016;2(6):518-525.