This study reports kinetics and equilibrium of lead sorption onto the biomass of Enterococcus faecium. E. faecium is a lactic acid bacterium and was isolated from meat. Batch experiments were carried out to analyze the effects of the initial lead concentration, initial pH of the medium, agitation time and temperature on the biosorption. The lead sorption was found to increase with the increase in the solution pH, reaching a plateau value beyond pH 5, and the most favorable pH for removal was determined as 5.0. The highest lead uptake capacity of the biomass was obtained at the initial lead concentration of 300 mg L–1. The Langmuir and Freundlich adsorption models were applied to determine the biosorption isotherm, and the equilibrium data correlated well with the Langmuir model. The pseudo-second-order kinetic model was more suitable to fit the experimental data. The results were promising that the biomass of this lactic acid bacterium can be successfully used as a convenient adsorbent for lead removal from aqueous solutions.
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Research Article|
October 01 2013
Sorption of lead ions from aqueous solution onto Enterococcus faecium biomass
Meral Yilmaz Cankilic;
Meral Yilmaz Cankilic
1Faculty of Sciences, Department of Biology, Anadolu University, Eskisehir, Turkey
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R. Bengu Karabacak;
R. Bengu Karabacak
2Faculty of Sciences, Department of Chemistry, Anadolu University, Eskisehir, Turkey
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Turgay Tay;
2Faculty of Sciences, Department of Chemistry, Anadolu University, Eskisehir, Turkey
E-mail: ttay@anadolu.edu.tr
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Merih Kivanc
Merih Kivanc
1Faculty of Sciences, Department of Biology, Anadolu University, Eskisehir, Turkey
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Water Sci Technol (2013) 68 (7): 1550–1555.
Article history
Received:
December 28 2012
Accepted:
May 29 2013
Citation
Meral Yilmaz Cankilic, R. Bengu Karabacak, Turgay Tay, Merih Kivanc; Sorption of lead ions from aqueous solution onto Enterococcus faecium biomass. Water Sci Technol 1 October 2013; 68 (7): 1550–1555. doi: https://doi.org/10.2166/wst.2013.398
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