The batch experiment conducted in this study focused on the
biosorption of Cd(II) ions onto U. lactuca biomass from aqueous solution. The results showed that the dead biomass of
green alga U. lactuca could be used as an efficient biosorbent
material for the removal of cadmium ions from aqueous solutions. pH 5.5 was selected as a compromised point with
removal percentage, 0.1 g biosorbents was achieved to highest
removal percentage and initial Cd2+ concentration is more
efficient in the range of 7 and 10 mg/L, with optimization temperature at 30 C. The Langmuir and Freundlich adsorption
models were used for the mathematical description of the biosorption equilibrium of cadmium ions to the dried biomass of
alga. The obtained results showed that the adsorption equilibrium data fitted very well to both the Langmuir and Freundlich models. Data of the IR spectrum confirmed the presence
of some functional groups in the biomass of U. lactuca. The
desorption experiments suggested that the regeneration of
the biosorbents was possible for repeated use especially with
regard to Cd(II). Finally, it was concluded that U. lactuca
can be used as an effective, low cost, and environmentally
friendly biosorbent for removal of Cd(II) ions from aqueous
solution