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Journal of Environmental Informatics

Online ISSN 1684-8799 / Print ISSN 1726-2135

 

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   Volume 19   Number 1   March  2012 = complimentary

doi:10.3808/jei.201200208 About DOIs

JEI 19(1) 2012, Pages 51-57  

© 2012 ISEIS. All rights reserved.

Characteristics and Thermodynamics of Biosorption Copper by a Newly Isolated Penicillium sp. QQ Using a Response Surface Methodology

B. Yan1*, J. T. Zhou2, Y. G. Li1, Q. Shi1, H. Y. Fu1, T. Chai1 and J. F. Liu1

  1. Department of Environmental Engineering, Xiamen University of Technology, Xiamen 361024, P. R. China
  2. Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, P. R. China

*Corresponding author. Tel: +86-592-6291138 Fax: +86-592-6291138 Email: yanb@xmut.edu.cn

 

Abstract

The objective of this study was to investigate the potential for Penicillium sp. QQ to perform copper adsorption. The following optimal conditions were assigned for biosorption by a response surface methodology (RSM): a biomass concentration of 4.6% (w/v), pH of 5.6, initial copper concentration of 100 mg/L and an established biosorption equilibrium after a 30 min reaction. A copper removal efficiency of about 98% was achieved after 30 min. The kinetics of copper adsorption are discussed, and the experimental data are fit to a pseudo-second-order kinetic model. The experimental results were analyzed using the Langmuir and Freundlich isotherms. The equilibrium constant b and n value show copper has been favorably adsorbed by the QQ strain. The thermodynamic parameters such as the free energy (∆Go), enthalpy (∆Ho) and entropy (∆So) also prove the adsorption process was thermodynamically feasible and spontaneous. The results indicate Penicillium sp. QQ could be used as a promising candidate for removing heavy metal ions from aqueous environments.


Keywords: response surface methodology (RSM), penicillium sp. QQ, copper, isotherms, thermodynamics, biosorption

 

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Cite this paper as: B. Yan, J. T. Zhou, Y. G. Li, Q. Shi, H. Y. Fu, T. Chai and J. F. Liu, 2012. Characteristics and Thermodynamics of Biosorption Copper by a Newly Isolated Penicillium sp. QQ Using a Response Surface Methodology. Journal of Environmental Informatics, 19(1), 51-57. http://dx.doi.org/10.3808/jei.201200208


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