Which chemical is NOT typically used as a coagulant in water treatment?

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Prepare for the ADEQ Water Treatment Grade 4 Test. Study with flashcards and multiple-choice questions, with each question offering hints and explanations. Ace your exam!

Multiple Choice

Which chemical is NOT typically used as a coagulant in water treatment?

Explanation:
Coagulation relies on chemicals that neutralize the negative charges on tiny particles so they can come together into bigger clumps (flocs) that settle out or are filtered. Alum and ferric chloride are classic metal coagulants that release multivalent ions to neutralize charges and help flocs form. Polymers act as coagulant aids, bridging particles to produce larger flocs more quickly. Chloramines are used for disinfection, not to destabilize or aggregate particles; they are kept in the water to kill microbes and maintain a residual disinfectant in the distribution system. So chloramines are not typically used as coagulants.

Coagulation relies on chemicals that neutralize the negative charges on tiny particles so they can come together into bigger clumps (flocs) that settle out or are filtered. Alum and ferric chloride are classic metal coagulants that release multivalent ions to neutralize charges and help flocs form. Polymers act as coagulant aids, bridging particles to produce larger flocs more quickly. Chloramines are used for disinfection, not to destabilize or aggregate particles; they are kept in the water to kill microbes and maintain a residual disinfectant in the distribution system. So chloramines are not typically used as coagulants.

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