Thermal power generation through coal combustion produces minute particle of ash(Fly Ash) that causes serious environment problems.
In 2008 in Europe, 38,000 kt of fly ash was produced from the combustion of lignite and coal. They are composed mainly of SiO2 and Al2O3. There are many and diverse applications of fly ash. They are mainly used to produce cement in the construction sector, but they are also used to make bricks. In other sectors they are used for the formation of embankments and fillings in road construction.
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See article below for more ideas about effective re-utilization of coal fly ash.
Article Possible applications of coal fly ash in wastewater treatment
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