Is Alum Positive Or Negative? [Solved]

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Is Alum Positive Or Negative? [Solved]

If the pH of the water is between 4 and 5, alum is generally present in the form of positive ions (i.e., Al(OH)2+, Al8(OH)4+, and Al3+). However, optimum coagulation occurs when negatively charged forms of alum predominate, which occurs when the pH is between 6 and 8.

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Alum

Water Treatment - Coagulation

The cool name of

Flocculation

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