Water Pollution and its Control
Question
Which of the following are considered as pollutant (s) of the water bodies?
(a) heated water
(b) plant nutrients
(c) heavy metals
(d) organic compounds
Easy
Solution
Heated (thermal) wastewaters flowing out of electricity-generating units, heavy metals (defined as elements with density > 5 g/cm3 such as mercury, cadmium, copper, lead, etc.), organic compounds are water pollutants. Even plant nutrients cause acceleration of eutrophication and thus are pollutants.
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