In this study, biosorption of cobalt(II), chromium(III), cadmium(II), and lead(II) ions from aqueous solution was studied using the algae nonliving biomass (Neochloris pseudoalveolaris, Np) as natural and biological sorbents. The effect of pH, contact time, temperature, and metal concentration on the adsorption capacity of metal ions was investigated. The maximum adsorption capacities for Co(II), Cr(II), Cd(II), and Pb(II) were found to be 20.1, 9.73, 51.4 and 96.2 mg/g at the optimum conditions, respectively. The experiments showed that when pH increased, an increase in the adsorption capacity of the biomass was observed too. The kinetic results of adsorption obeyed a pseudo second-order model. Freundlich and Langmuir isotherm models were applied to experimental equilibrium data of metal ions adsorption and the value of R-L for Pb(II), Cb,(II), Co(II), and Cr(III) was found to be 0.376, 0271, 0872, and 096, respectively. The thermodynamic parameters related to the adsorption process such as E-a, Delta G(0), Delta H-0, and Delta S-0 were calculated. Delta H-0 values (positive) showed that the adsorption mechanism was endothermic. Weber-Morris and Urano-Tachikawa diffusion models were also applied to experimental equilibrium data. The algae biomass was effectively used as a sorbent for the removal of metal ions from aqueous solutions.
In this study, biosorption of cobalt(II), chromium(III), cadmium(II), and lead(II) ions from
aqueous solution was studied using the algae nonliving biomass (Neochloris pseudoalveolaris,
Np) as natural and biological sorbents. The effect of pH, contact time, temperature, and metal
concentration on the adsorption capacity of metal ions was investigated. The maximum adsorption
capacities for Co(II), Cr(II), Cd(II), and Pb(II) were found to be 20.1, 9.73, 51.4 and 96.2 mg/g at
the optimum conditions, respectively. The experiments showed that when pH increased, an
increase in the adsorption capacity of the biomass was observed too. The kinetic results of adsorption
obeyed a pseudo second-order model. Freundlich and Langmuir isotherm models were applied
to experimental equilibrium data of metal ions adsorption and the value of RL for Pb(II), Cb,(II),
Co(II), and Cr(III) was found to be 0.376, 0271, 0872, and 096, respectively. The thermodynamic
parameters related to the adsorption process such as Ea, DG0, DH0, and DS0 were calculated.
DH0 values (positive) showed that the adsorption mechanism was endothermic. Weber-Morris
and Urano-Tachikawa diffusion models were also applied to experimental equilibrium data. The
algae biomass was effectively used as a sorbent for the removal of metal ions from aqueous solutions.
