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Alum is effective when pH of water is between ____

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+1 vote
in Environmental Engineering by (81.4k points)
Alum is effective when pH of water is between ____

(a) 8-10

(b) 6-8

(c) 6.5-8.5

(d) 7-9

This question was posed to me during a job interview.

The doubt is from Sedimentation with Coagulation topic in portion Sedimentation of Environmental Engineering

1 Answer

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Best answer
The correct option is (c) 6.5-8.5

The best explanation: Alum is effective when pH of water is between 6.5-8.5. Its dose depends on turbidity, color, taste, pH and temperature of water.

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