Answer / nataraj

Flotation is a method for the separation of mixtures.
Flotation is a separation technique used widely in the
minerals industry, water treatment amongst others also
used in the food and coal industries.

This technique works upon differences in the surface
properties of different particles to separate them. The
particles that are to be floated are rendered hydrophobic
by the addition of the appropriate chemicals.

Air is then bubbled through the mixture and the desired
particles become attached to the small air bubbles and move
to the surface where they accumulate as a froth and are
collected, the non-desired particles are collected and
discarded.

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