Granular activated carbon is most commonly used in water treatment to reduce:
Correct answer: B. Taste, odour and dissolved organic compounds
- A. Coarse grit and large floating debris
- B. Taste, odour and dissolved organic compounds
- C. Water hardness caused by calcium ions
- D. Settleable mineral particles in raw water
Explanation
Activated carbon adsorbs many dissolved organic substances that cause taste, odour and colour. It is not the main process for removing hardness, grit or readily settleable particles.
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Environmental engineering examines water supply, water quality, treatment processes, wastewater collection and treatment, solid waste management, air pollution and public health protection. It covers sedimentation, coagulation, filtration, disinfection, biological treatment and disposal methods, while distinguishing drinking-water treatment from sewage treatment and BOD from COD.
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