How Potassium permagnate works during water purification. : Potassium Permagnate oxidizes dissolved iron, manganese, and hydrogen sulfide into solid particles that are filtered out of the water. It can also be used to control iron bacteria growth in wells. After treatment with Potassium permagnate,  The solid pricipitate particles are then filtered with a multimedia filter which can be either manganese-coated aluminum silicate above manganese-treated green sand or an 8-inch layer of anthracite above manganese-treated greensand. If an insufficient amount of iron, manganese, or hydrogen sulfide is oxidized prior to filtration, the manganese coating on the filter media acts as a backup oxidant to treat any remaining contaminant. If too much potassium permanganate is fed into the water prior to filtration, the excess potassium permanganate serves as a regenerant for the filter media. The water should be colorless when it leaves the filter.

Important Link ::: H2S vial (Bacteriological ) Kit use for checking microbiological quality of water. Water borne diseases like typhoid ,cholera, diarrhoea and jaundice and caused  by polluted water supply. The conventional method for testing the microbiological quality of water needs the service of  a qualified microbiologist , laboratory facilities  and take 60 - 72 hours to know the result. And further the laboratory may charge any amount per sample for the test. The new devloped screening test ,  done at field itself, dispenses with all these problems and will cost  & timing much less.

 

Also refer this link ::: http://dubichem.com/How-to-Disinfect-Water-by-Using-Calcium-Hypochlorite

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