TY - JOUR
T1 - Biosorption of heavy metals by lyophilized cells of Pseudomonas stutzeri
AU - Oh, Sang Eun
AU - Hassan, Sedky H.A.
AU - Joo, Jin Ho
N1 - Funding Information:
Acknowledgments This study was partially supported by a grant from the Research Institute of Agricultural Science, Kangwon National University, and 2006 grant from Kangwon National University.
PY - 2009/8
Y1 - 2009/8
N2 - Biosorptive capacity of Pb(II), Cd(II) and Cu(II) by lyophilized cells of Pseudomonas stutzeri was investigated based on Langmuir and Freundlich isotherms. Biosorptive capacity for Pb(II), Cd(II) and Cu(II) decreased with an increase of metal concentration, reaching 142, 43. 5 and 36. 2 mg/g at initial concentration of 300 mg/l, respectively. Biosorption capacity for metal ions increased with increasing pH. The optimum pH for biosorption rate of Cd(II) and Cu(II) were 5.0, and 6.0 for Pb(II) biosorption. The experimental data showed a better fit with the Langmuir model over the Freundlich model for metal ions throughout the range of initial concentrations. The maximum sorptive capacity (qmax) obtained from the Langmuir equation for Pb(II), Cd(II) and Cu(II) were 153.3 (r2 = 0.998), 43.86 (r2 = 0.995), and 33.16 (r2 = 0.997) for metal ions, respectively. The selectivity order for metal ions towards the biomass of P. stutzeri was Pb(II) > Cd(II) > Cu(II) for a given initial metal ions concentration. The interactions between heavy metals and functional groups on the cell wall surface of bacterial biomass were confirmed by FTIR analysis. The results of this study indicate the possible removal of heavy metals from the environment by using lyophilized cells of P. stutzeri.
AB - Biosorptive capacity of Pb(II), Cd(II) and Cu(II) by lyophilized cells of Pseudomonas stutzeri was investigated based on Langmuir and Freundlich isotherms. Biosorptive capacity for Pb(II), Cd(II) and Cu(II) decreased with an increase of metal concentration, reaching 142, 43. 5 and 36. 2 mg/g at initial concentration of 300 mg/l, respectively. Biosorption capacity for metal ions increased with increasing pH. The optimum pH for biosorption rate of Cd(II) and Cu(II) were 5.0, and 6.0 for Pb(II) biosorption. The experimental data showed a better fit with the Langmuir model over the Freundlich model for metal ions throughout the range of initial concentrations. The maximum sorptive capacity (qmax) obtained from the Langmuir equation for Pb(II), Cd(II) and Cu(II) were 153.3 (r2 = 0.998), 43.86 (r2 = 0.995), and 33.16 (r2 = 0.997) for metal ions, respectively. The selectivity order for metal ions towards the biomass of P. stutzeri was Pb(II) > Cd(II) > Cu(II) for a given initial metal ions concentration. The interactions between heavy metals and functional groups on the cell wall surface of bacterial biomass were confirmed by FTIR analysis. The results of this study indicate the possible removal of heavy metals from the environment by using lyophilized cells of P. stutzeri.
KW - Biosorption
KW - Cadmium
KW - Copper
KW - Lead
KW - Lyophilized cells
KW - Pseudomonas stutzeri
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U2 - 10.1007/s11274-009-0075-6
DO - 10.1007/s11274-009-0075-6
M3 - Article
AN - SCOPUS:71349083417
SN - 0959-3993
VL - 25
SP - 1771
EP - 1778
JO - World Journal of Microbiology and Biotechnology
JF - World Journal of Microbiology and Biotechnology
IS - 10
ER -