Question 1

Equilibrium isotherm data for adsorption of glucose from an aquous solution to activated

alumina are as follows:

c(g/cm3) 0.0040 0.0087 0.019 0.027 0.094 0.195

q(g solute/g alumina) 0.026 0.053 0.075 0.082 0.123 0.129

Determine the isotherm that fits the data and give the constants of the equation using the

given units.

Solutions:

Question 2

A wastewater solution having a volume of 2.5 m3 contains 0.25 kg phenol/m3 of solution. This

solution is mixed thoroughly in a batch process with 3.0 kg of granular activated carbon until

equilibrium is reached. Use the following isotherm and calculate the final equilibrium values

and the percent phenol extrated.

Solution:

c q

kg phenol/ m3 solution kg phenol/ kg carbon

0.322 0.15

0.117 0.122

0.039 0.094

0.0061 0.059

0.0011 0.045