write the merit and demerit of ultraviolet ray
Answers
Answer:
Exposure To UV Rays May Cause Skin Cancer. UV Rays Leads To Melanoma. It Suppress The Proper Functioning Of Immune System. It Causes Cataract.
Explanation:
fig01Ultra Violet Radiation
The ultraviolet radiation method is one of the most used methods of water softening concerning the removal of bacteria. The ultraviolet rays are so powerful such that when they are directed to the target water they instantly destroy all the pathogens in the water. All the process takes place in an ultraviolet chamber. This method is preferred because it is an environmentally friendly process because no chemical is used. In addition to that, there is no by-product that is released to the environment compared to other water softening methods like lime softening that produce sodium as a by-product. The process of destroying the pathogens occurs very fast and then water flows through the system. Also, the system does not consume a lot of energy because only the ultraviolet radiations are the ones needed.
Advantages of Ultra Violet Radiation
The process only requires a minimal amount of electricity.
It is also very environmental friendly. This is because it does not emit any by-products such as sodium into the environment. Therefore, there are no chemicals handled.
The UV system is very cost effective.
The process also destroys each and every microorganism that is in the water.
The water flow in the whole system is just pure.
Disadvantages of Ultraviolet Radiation
The water must be very clear so that the Ultra Violet radiation can pass through and destroy the pathogens.
The process can occur in a place which has no electricity.
Ultraviolet radiation method is only able to deal with microorganisms, and that means that if the hard water contains minerals such as magnesium and calcium, then the rays will not be able to eliminate them.
Conclusion
The method is only suitable when microorganisms needed to be destroyed but