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Which of the following is not an adsorbent?

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in Bioprocess Engineering by (80.7k points)
Which of the following is not an adsorbent?

(a) Carbon

(b) Polymers and resins

(c) Clay

(d) Dry sponge

This question was addressed to me in an online quiz.

Question is from Adsorption topic in division Unit Operations of Bioprocess Engineering

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Best answer
Right choice is (d) Dry sponge

Best explanation: A sponge will absorb or take in water from another area and put it inside of itself. A dry sponge can hold more water than a wet sponge is closer to saturation and as such cannot hold more water. Sponges with more tiny holes can absorb more water than the sponges with less tiny holes and thus leads to the absorption process.

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