The Langmuir isotherm is
given by the following Eq. (3) [21]:
qe ผ QbCe=๐1 bCe ๐3
a linear form of this expression is:
1=qe ผ ๐1=Q ๐1=QbCe ๐4
where qe is the amount of dye adsorbed per gram of cotton fiber
(mg/g) at equilibrium; Ce denotes the equilibrium concentration
of dye in solution (mg/l); b represents the Langmuir constant (l/
mg) that relates to the affinity of binding sites and Q is the theoretical
saturation capacity of the monolayer (mg/g).