Coal ash is a byproduct of coal combustion (such as in energy production) and can be reused in construction materials such as concrete. However, coal ash does contain several environmental hazards such as heavy metals like lead and mercury, and it does pose a risk as a groundwater contaminant. Regulation of coal ash is currently on a state by state basis, although possible federal regulations are currently under review with the consideration to classify coal ash as a hazardous substance, which would mandate specific holding and treatment processes.
ash can only be used as the product for the construction .Along with the help of the binders or the additives ash can be made as brick .otherwise there is no other use of it as because it has very fine particles which can harm the worker during the operating conditions.it can cause breathing problems.
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