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Mass Transfer - Engineering

Q1:

Freundlich equation applies to the adsorption of solute from

A dilute solutions, over a small concentration range.

B gaseous solutions at high pressure.

C concentrated solutions.

D none of these.

ANS:A - dilute solutions, over a small concentration range.

The Freundlich equation applies to the adsorption of solute from dilute solutions, over a small concentration range. The Freundlich equation describes the equilibrium relationship between the concentration of solute in the liquid phase and the amount of solute adsorbed onto a solid adsorbent. It is commonly used for the adsorption of solutes from dilute solutions, typically over a small concentration range where the adsorption process is relatively linear and reversible. The equation is expressed as: π‘ž=π‘˜⋅𝐢𝑛q=k⋅Cn Where:

  • π‘žq is the amount of solute adsorbed per unit mass of adsorbent,
  • 𝐢C is the equilibrium concentration of the solute in the liquid phase,
  • π‘˜k and 𝑛n are constants characteristic of the adsorbent and the solute, respectively.
So, the correct option is: dilute solutions, over a small concentration range.