Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre) ?
Correct answer: A. Activated carbon adsorption
- A. Activated carbon adsorption
- B. Lagooning
- C. Biological oxidation pond
- D. Chemical coagulation
Explanation
Activated carbon is highly effective for polishing water containing small concentrations of dissolved organic compounds because it adsorbs them onto a large internal surface area. Lagooning and biological oxidation are better suited to larger biodegradable loads, while coagulation mainly removes suspended or colloidal matter.
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