The current study deals with evaluation of
biosorption feasibility for removal of Cu(II) and Zn(II) by
hybrid immobilized biosorbent of Pleurotus sajor-caju
. Batch adsorption experiments were carried
out to assess the effect of pH, initial metal concentration,
biomass dose, temperature and time. The
biosorption efficiency of Cu(II) and Zn(II) ions for hybrid
immobilized biosorbent increases with rising pH values.
The hybrid immobilized biosorbent illustrated the highest
biosorption capability at pH 5 for Cu(II), 6 for Zn(II), at
0.05 g/100 mL dose and 100 mg/L initial metal concentration
of both ions. Uptake kinetics followed the pseudosecond-
order model and equilibrium was described by
Langmuir and Freundlich isotherms. Adsorption ratios of
Cu(II) and Zn(II) were best fitted to Langmuir isotherm.
The best temperature for ion uptake was found to be 30 °C.