Fly ash can be utilized as an important resource. Justify this statement.
Introduction:
Fly ash is a by-product of coal burning. It is majorly obtained in the thermal power plants. It contains: Aluminum Silicate in large quantity, Silicon dioxide and Calcium Oxide along with other particles such as heavy metallic oxides.
Body:
Benefits of Fly ash:
- It can replace cement upto 40% in construction and related activities
- Bricks can be manufactured by fly ash which are light weight and durable
- Used in road embankments
- Used in filling up the abandoned mines
- It can increase crop yield when added to soil in suitable proportion
- Water holding capacity is increased
Challenges involved:
- Contains excess of unburnt carbon
- Improper disposal
- Affects the aquatic life when mixed with water in large quantity
- They are a major toxic air pollutant which can cause diseases like cancer, asthma, lung disorders.
- Leaching effect of heavy metals
- Soil pollution thus affecting the crops when not managed properly
Conclusion:
The Fly ash is allocated by the National Thermal Power Corporation to the industries. Lack of supply is hampering these industries in India. Therefore a suitable measure should be taken in order to reuse the majority of Fly ash by streamlining the processes.