Boiling drinking water is effective for destroying many pathogens, but it generally does not remove:
Correct answer: D. Dissolved salts and minerals
- A. Most heat-sensitive disease organisms
- B. Bacteria and many viruses
- C. Protozoan cysts and oocysts
- D. Dissolved salts and minerals
Explanation
Boiling provides thermal disinfection and destroys many bacteria, viruses and protozoan forms when applied adequately. It does not normally remove dissolved salts and minerals, and evaporation can sometimes concentrate them.
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About Environmental Engineering
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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