Mechanism of Adsorptive Removal of Methylene Blue Using Dried Biomass of Rhizopus oryzae

Adsorption is an efficient way to remove synthetic dyes from industrial effluent. Here, we show mechanism of adsorptive removal of cationic dye methylene blue (MB) from its aqueous solution using dried biomass of Rhizopus oryzae as a biosorbent. The optimum pH and temperature for adsorption was foun...

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Bibliographic Details
Published in:Applied biochemistry and biotechnology 2015-09, Vol.177 (2), p.541-555
Main Authors: Dey, Manash Deep, Shukla, Ruchi, Bordoloi, Naba K, Doley, Robin, Mukhopadhyay, Rupak
Format: Article
Language:English
Subjects:
Adsorption
aqueous solutions
Biochemistry
Biodegradation, Environmental
Biomass
biosorbents
Biotechnology
Chemistry
Chemistry and Materials Science
Coloring Agents - chemistry
Coloring Agents - isolation & purification
Desiccation
Diffusion
Dyes
Fourier transform infrared spectroscopy
Hydrogen-Ion Concentration
industrial effluents
Kinetics
methylene blue
Methylene Blue - chemistry
Methylene Blue - isolation & purification
Rhizopus - metabolism
Rhizopus - ultrastructure
Rhizopus oryzae
Rice
scanning electron microscopy
sorption isotherms
Spectrometry, X-Ray Emission
Temperature
topology
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Summary:Adsorption is an efficient way to remove synthetic dyes from industrial effluent. Here, we show mechanism of adsorptive removal of cationic dye methylene blue (MB) from its aqueous solution using dried biomass of Rhizopus oryzae as a biosorbent. The optimum pH and temperature for adsorption was found to be 7.0 and 28 °C, respectively. Scanning electron microscopy (SEM) of the biomass suggested distinct changes in surface topology post-MB adsorption, while Fourier transform infrared (FTIR) study indicated chemical interaction between the surface of the biomass and MB. Chemical modification of –OH and –C=O groups of biomass reduced the MB adsorption and corroborated with the FTIR analyses. Kinetics study revealed that the adsorption rate was fast initially and reached equilibrium at 4 h following a pseudo-second-order-kinetics. The adsorption isotherm followed Freundlich isotherm model with n value of 1.1615.The dried biomass of R. oryzae can be used as a potent biosorbent for the removal of MB.
ISSN:0273-2289
1559-0291
DOI:10.1007/s12010-015-1761-5