Very fine suspended and colloidal impurities are removed from water by a process called___________________?
Correct answer: B. Coagulation
- A. Sedimentation
- B. Coagulation
- C. Disinfection
- D. Softening
Explanation
Coagulation neutralizes the charges that keep colloidal particles dispersed, allowing them to combine into larger flocs for later removal. Sedimentation alone is mainly effective for particles that settle readily.
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