Journal
COLLOIDS AND SURFACES B-BIOINTERFACES
Volume 88, Issue 1, Pages 521-526Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfb.2011.07.047
Keywords
Acid Blue 25; Cetylpyridinium chloride; Biosorption isotherms; Penicillium YW 01
Funding
- National Hi-Tech Research and Development Program (863) of China [2007AA06Z329]
- National Natural Science Foundation of China [31070079]
- Science and Technology Project of Zhejiang Province [2008C13014-3]
- International Cooperation Project in Science and Technology of Zhejiang Province [2008C14038]
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The main objective of this work was to investigate the biosorption performance of unmodified and Cetylpyridinium chloride (CPC)-modified biomass of Penicillium YW 01 for Acid Blue 25 (AB 25). Maximum biosorption capacity of AB 25 onto CPC-modified biosorbent was 118.48 mg g(-1) under phosphoric-phosphate buffer with initial dye concentration of 200 mg L-1 at 30 degrees C. The biosorption pattern of AB 25 onto unmodified biosorbent in aqueous solution and phosphoric-phosphate buffer was well fitted with both Langmuir and Freundlich isotherm models. While the equilibrium data of CPC-modified biosorbent in aqueous solution and phosphoric-phosphate buffer failed to fit the Freundlich isotherm model. indicating the monolayer biosorption formed onto CPC-modified biosorbent. The values of initial biosorption rate of biosorbent in phosphoric-phosphate buffer were found to be higher than that of corresponding values in aqueous solution, indicating phosphoric-phosphate buffer enhanced the initial biosorption rate of biosorption process. Weber-Morris model analysis indicated that the boundary layer effect had more influence on the biosorption process in phosphoric-phosphate buffer. The BET surface area of CPC-modified biosorbent (0.5761 m(2) g(-1)) was larger than that of unmodified biomass (0.3081 m(2) g(-1)). Possible dye-biosorbent interactions were confirmed by Fourier transform infrared spectroscopy. (C) 2011 Elsevier B.V. All rights reserved.
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