Langmuir adsorption isotherm.

To recover cellulase enzyme from $100$ mL of feed solution by adsorption using activated carbon. The concentration of enzyme is $0\mathrm{.}20$ mg$/$mL$.4$ g of activated will be added into the solution. The adsorption follows Langmuir adsorption isotherm. $\_$max$=54\mathrm{.}8$ mg$/$g

K$=4\mathrm{.}53$ mL$/$mg

How much of enzyme can be recovered?