Equilibrium and thermodynamic studies on biosorption of Pb(II) onto Candida albicans biomass

Journal of Hazardous Materials
Zübeyde BaysalMehmet Dogru

Abstract

Biosorption of Pb(II) ions from aqueous solutions was studied in a batch system by using Candida albicans. The optimum conditions of biosorption were determined by investigating the initial metal ion concentration, contact time, temperature, biosorbent dose and pH. The extent of metal ion removed increased with increasing contact time, initial metal ion concentration and temperature. Biosorption equilibrium time was observed in 30min. The Freundlich and Langmuir adsorption models were used for the mathematical description of biosorption equilibrium and isotherm constants were also evaluated. The maximum biosorption capacity of Pb(II) on C. albicans was determined as 828.50+/-1.05, 831.26+/-1.30 and 833.33+/-1.12mgg(-1), respectively, at different temperatures (25, 35 and 45 degrees C). Biosorption showed pseudo second-order rate kinetics at different initial concentration of Pb(II) and different temperatures. The activation energy of the biosorption (Ea) was estimated as 59.04kJmol(-1) from Arrhenius equation. Using the equilibrium constant value obtained at different temperatures, the thermodynamic properties of the biosorption (DeltaG degrees , DeltaH degrees and DeltaS degrees ) were also determined. The results showed that ...Continue Reading

References

Jul 28, 2005·Journal of Environmental Management·Yasemin Bulut, Zübeyde Baysal
Jan 31, 2006·Journal of Hazardous Materials·Ahmet CabukOzge Tabak
Nov 23, 2006·Journal of Hazardous Materials·Yasemin BulutHaluk Aydin
May 1, 2007·Journal of Hazardous Materials·Yasemin Bulut, Zeki Tez
Oct 6, 2007·Journal of Environmental Sciences (China)·Yasemin Bulut, Zeki Tez

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Citations

Mar 20, 2012·Environmental Science and Pollution Research International·Abbas Hamid SulaymonMohanad Jasim Mohammed-Ridha
May 15, 2013·Applied Biochemistry and Biotechnology·Izabela MichalakAnna Witek-Krowiak
Jun 2, 2009·Journal of Hazardous Materials·Ali Behnamfard, Mohammad Mehdi Salarirad
Aug 14, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·S VimalnathS Subramanian
May 20, 2019·Environmental Science and Pollution Research International·Geovani Rocha de FreitasMelissa Gurgel Adeodato Vieira
Feb 7, 2013·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Aleksandra Duda-ChodakTomasz Tarko
Jul 18, 2019·Environmental Science and Pollution Research International·Zeynep Mine ŞenolSelçuk Şimşek

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