On the other hand, the least suitable isotherm model is
the Freundlich isotherm model, with the highest MRE and SEE average values.
Langmuir constant, qmax, which is a measure of monolayer biosorption capacity of
sawdust was determined as 41.21 mg/g and Langmuir constant KL referring to
biosorption energy, was determined as 0.041. Also, the calculated constant values of
Khan and Toth isotherm models are represented in Table (1), the qs maximum uptake
capacity calculated for Khan model is calculated as 37.92 mg/g.