Chemistry project
Checking the bacterial contamination in drinking water by testing sulphide ion
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The sulphide ion test for bacterial contamination is good. In surface waters, hydrogen sulphide is formed under oxygen-deficient conditions. Hydrogen sulphide is also produced from the decomposition of sulphur containing organic compounds. The concentration of sulphide ion becomes significant only at pH 10 or above.
Under acidic conditions, the concentration of hydrogen sulphide predominates. Hydrogen sulphide is a weak acid, which ionizes to yield hydrosulphide (HS_-) and sulphide (S2) ions. Hydrogen sulphide is extremely toxic to fish. Concentrations of total sulphide as low as 0.01 mg/L make the water unfit for uninhibited fish culture. Hydrogen sulphide also reduces the aesthetic value of the water body due to foul colour. The bacterial contamination can be tested using the H2S strip.
The water to be tested is to be filled in the bottle having an H2S strip, and keep it in the incubator; at 35degree centigrade for 14 to 16 hours. If the strip becomes black then the water is not fit for human consumption as it is contaminated and bacteriologically not potable. This is the simple and quick method as it needs no sterilization.
Under acidic conditions, the concentration of hydrogen sulphide predominates. Hydrogen sulphide is a weak acid, which ionizes to yield hydrosulphide (HS_-) and sulphide (S2) ions. Hydrogen sulphide is extremely toxic to fish. Concentrations of total sulphide as low as 0.01 mg/L make the water unfit for uninhibited fish culture. Hydrogen sulphide also reduces the aesthetic value of the water body due to foul colour. The bacterial contamination can be tested using the H2S strip.
The water to be tested is to be filled in the bottle having an H2S strip, and keep it in the incubator; at 35degree centigrade for 14 to 16 hours. If the strip becomes black then the water is not fit for human consumption as it is contaminated and bacteriologically not potable. This is the simple and quick method as it needs no sterilization.
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Cholera and shigella as well as "food poisoning "e. g. bacterial gastroenteritis caused by Salmonella and E. coli. Also relevant are protozoan bugs e. g.
Giardia...
you will die because the bacteria or poison will go inside you then control your body
it depends where you live. Drinking water in some area of the word is contaminated, while in others it isn't 't.
I hope it's helps you
___swarnim__###
Giardia...
you will die because the bacteria or poison will go inside you then control your body
it depends where you live. Drinking water in some area of the word is contaminated, while in others it isn't 't.
I hope it's helps you
___swarnim__###
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