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Adapting the use of Fe3O4 nanoparticles in large-scale water treatment facilities

Published online by Cambridge University Press:  19 May 2014

K. Simeonidis ,
N. Andritsos ,
E. Kaprara ,
S. Mourdikoudis  and
M. Mitrakas
K. Simeonidis
Affiliation:
Department of Mechanical Engineering, University of Thessaly, 38334 Volos, Greece
N. Andritsos
Affiliation:
Department of Mechanical Engineering, University of Thessaly, 38334 Volos, Greece
E. Kaprara
Affiliation:
Analytical Chemistry Laboratory, Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
S. Mourdikoudis
Affiliation:
Analytical Chemistry Laboratory, Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
M. Mitrakas
Affiliation:
Analytical Chemistry Laboratory, Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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Abstract

Magnetite nanoparticles were produced by the chemical co-precipitation of iron sulfates at alkaline conditions and were tested as a Cr(VI) adsorbent from water. Batch adsorption experiments showed a high removal efficiency, which is maximized at pH values below 6. This behavior was also verified in a continuous flow reactor, where nanoparticles were in contact with the polluted water. In particular, using a particle concentration of 1 g/L in water containing 100 μg Cr(VI)/L, a contact time of at least 2 h was required to achieve complete removal of Cr(VI). The recovery of nanoparticles after their use was accomplished using their magnetic nature. Application of an external magnetic field at the sides of the tube in which the suspension was flowing was sufficient to completely collect the nanoparticles in the outflow of the contact reactor, thus, providing water free of Cr(VI) and a solid phase.

Keywords

magneticchemical synthesisCr
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1708: Symposium VV – Advanced Materials for Rechargeable Batteries , 2014 , mrss14-1708-vv04-22
Copyright
Copyright © Materials Research Society 2014 

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References

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