Development of chitosan/Spirulina bio‐blend films and its biosorption potential for dyes

ABSTRACT Chitosan/Spirulina bio‐blends (CSBB) in films form were developed to be an alternative/renewable biosorbent, able to remove anionic and cationic dyes from aqueous solutions. CSBB potential as biosorbent was investigated for cationic dye Methylene Blue (MB), and anionic dyes Tartrazine Yello...

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Bibliographic Details
Published in:Journal of applied polymer science 2017-03, Vol.134 (11), p.np-n/a
Main Authors: Silva, J. M., Farias, B. S., Gründmann, D. D. R., Cadaval, T. R. S., Moura, J. M., Dotto, G. L., Pinto, L. A. A.
Format: Article
Language:English
Subjects:
adsorption
Aqueous solutions
biopolymers and renewable polymers
blends
Cationic
Cationic dyes
Chitosan
crosslinking
Crystallinity
Dyes
Materials science
Mechanical properties
Methylene blue
Polymers
Spirulina
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Summary:ABSTRACT Chitosan/Spirulina bio‐blends (CSBB) in films form were developed to be an alternative/renewable biosorbent, able to remove anionic and cationic dyes from aqueous solutions. CSBB potential as biosorbent was investigated for cationic dye Methylene Blue (MB), and anionic dyes Tartrazine Yellow (TY) and Reactive Black 5 (RB5). Chitosan and Spirulina samples were obtained and characterized, and CSBB films were prepared with different chitosan/Spirulina ratios. The CSBB films characteristics, as, mechanical properties, thermal profile, crystallinity, functional groups, morphology, and biosorption potential were strongly dependent of chitosan/Spirulina ratio. CSBB films preserved its mechanical structures at pH from 4.0 to 8.0. The biosorption capacities were 120, 110, and 100 mg g−1 for RB5, TY, and MB, respectively. The increase of chitosan amount favored the TY and RB5 biosorption; however, the increase of Spirulina amount favored the MB biosorption. Thus, the CSBB in film form is a renewable biosorbent suitable to remove anionic and cationic dyes from aqueous solutions. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44580.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.44580