Loughborough University
Leicestershire, UK
LE11 3TU
+44 (0)1509 263171
Loughborough University

Loughborough University Institutional Repository

Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/19059

Title: Biosorption of azo dyes by raspberry-like Fe3O4@yeast magnetic microspheres and their efficient regeneration using heterogeneous Fenton-like catalytic processes over an up-flow packed reactor
Authors: Song, Rui
Bai, Bo
Li Puma, Gianluca
Wang, Honglun
Suo, Yourui
Keywords: Yeast
Iron oxide
Fixed-bed
Fenton-like reaction
Regeneration
Wastewater
Issue Date: 2015
Publisher: © Akadémiai Kiadó Zrt
Citation: SONG, R. ...et al., 2015. Biosorption of azo dyes by raspberry-like Fe3O4@yeast magnetic microspheres and their efficient regeneration using heterogeneous Fenton-like catalytic processes over an up-flow packed reactor. Reaction Kinetics Mechanisms and Catalysis, 115(2), pp. 547-562.
Abstract: Raspberry-like Fe3O4@yeast composite microspheres, whose properties integrate the biosorption features of yeast cells with the excellent magnetic and catalytic properties of Fe3O4 nanoparticles were synthesized by a simple electrostatic-interaction-driven self-assembly heterocoagulation. They were successfully applied in an up-flow packed column for the removal of the model water contaminant methylene blue dye (MB) by consecutive bioadsorption-heterogeneous Fenton oxidation cycles. The as-synthesized Fe3O4@yeast composites were characterized by field emission scanning electron microscopy (FE-SEM), energy-dispersive spectroscopy (EDS), powder X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy. The adsorption process was controlled by the electrostatic interactions between the adsorbent and contaminant. The adsorbent is suitable for the adsorption of positively charged compounds at mildly acidic pH, neutral and alkaline pH, with the highest performance observed at alkaline pH. The experimental breakthrough curves measured at different influent MB concentration, flow rate, bed height and pH were modeled by the Yoon-Nelson model. The in-situ regeneration of the contaminant-loaded Fe3O4@yeast microspheres and their reuse in multiple cycles was demonstrated by triggering the heterogeneous Fenton-like reaction catalyzed by the supported magnetite. The raspberry-like Fe3O4@yeast magnetic microsphere should be a promising and practical adsorbent for removal and destruction of positively charged organic compounds in wastewater.
Description: This paper was accepted for publication in the journal Reaction Kinetics, Mechanisms and Catalysis and the definitive published version is available at http://dx.doi.org/10.1007/s11144-015-0854-z
Sponsor: This work was supported by China Postdoctoral Science Special Foundation, Scientific Research Foundation for the Returned Overseas Chinese Scholars, National Natural Science Foundation of China (No.21176031) and Fundamental Research Funds for the Central Universities (No. 2013G2291015)
Version: Accepted for publication
DOI: 10.1007/s11144-015-0854-z
URI: https://dspace.lboro.ac.uk/2134/19059
Publisher Link: http://dx.doi.org/10.1007/s11144-015-0854-z
ISSN: 1878-5190
Appears in Collections:Published Articles (Chemical Engineering)

Files associated with this item:

File Description SizeFormat
song.pdfAccepted1.42 MBAdobe PDFView/Open

 

SFX Query

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.