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Efficiency enhancements through the use of magnetic field gradient in orientation magnetic separation for the removal of pollutants by magnetotactic bacteria

Efficiency enhancements through the use of magnetic field gradient in orientation magnetic separation for the removal of pollutants by magnetotactic bacteria
Efficiency enhancements through the use of magnetic field gradient in orientation magnetic separation for the removal of pollutants by magnetotactic bacteria
Orientation magnetic separation (OMS) represents a simple method that permits motile, field-susceptible magnetotactic bacteria (MTB) to be separated from water. Such an approach can be used to decontaminate polluted water through uptake of contaminants by the bacteria and their subsequent removal by the application of magnetic fields. In OMS, a separation channel through which an MTB culture is flowing is subjected to a magnetic field perpendicular to the flow direction. The bacteria "sense" the magnetic field, orientating themselves parallel to the field lines and then swim to the channel sides where they accumulate.
The fluid flow through such a standard separation channel has been shown to cause dislodgement of accumulated bacteria. To reduce this effect, a new approach has been developed utilizing magnetic gradients to retain the bacteria at the walls of the separator. A study comparing the operation of a standard channel separator with three new designs containing nickel wire matrices has been carried out. The resultant separation efficiencies and the effect on separation of varying both the flow rate and the applied magnetic field are described. The new separators enhance the separation efficiency by up to 300% over the standard separator.
biomagnetism, orientation magnetic separation, magnetotactic bacteria
3661-3671
Bahaj, A.S.
a64074cc-2b6e-43df-adac-a8437e7f1b37
James, P.A.B.
da0be14a-aa63-46a7-8646-a37f9a02a71b
Moeschler, F.D.
77c0ee18-3a8e-4512-bb28-acecf94c8720
Bahaj, A.S.
a64074cc-2b6e-43df-adac-a8437e7f1b37
James, P.A.B.
da0be14a-aa63-46a7-8646-a37f9a02a71b
Moeschler, F.D.
77c0ee18-3a8e-4512-bb28-acecf94c8720

Bahaj, A.S., James, P.A.B. and Moeschler, F.D. (2002) Efficiency enhancements through the use of magnetic field gradient in orientation magnetic separation for the removal of pollutants by magnetotactic bacteria. Separation Science and Technology, 37 (16), 3661-3671. (doi:10.1081/SS-120014825).

Record type: Article

Abstract

Orientation magnetic separation (OMS) represents a simple method that permits motile, field-susceptible magnetotactic bacteria (MTB) to be separated from water. Such an approach can be used to decontaminate polluted water through uptake of contaminants by the bacteria and their subsequent removal by the application of magnetic fields. In OMS, a separation channel through which an MTB culture is flowing is subjected to a magnetic field perpendicular to the flow direction. The bacteria "sense" the magnetic field, orientating themselves parallel to the field lines and then swim to the channel sides where they accumulate.
The fluid flow through such a standard separation channel has been shown to cause dislodgement of accumulated bacteria. To reduce this effect, a new approach has been developed utilizing magnetic gradients to retain the bacteria at the walls of the separator. A study comparing the operation of a standard channel separator with three new designs containing nickel wire matrices has been carried out. The resultant separation efficiencies and the effect on separation of varying both the flow rate and the applied magnetic field are described. The new separators enhance the separation efficiency by up to 300% over the standard separator.

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More information

Published date: 2002
Keywords: biomagnetism, orientation magnetic separation, magnetotactic bacteria
Organisations: Civil Engineering & the Environment

Identifiers

Local EPrints ID: 46289
URI: http://eprints.soton.ac.uk/id/eprint/46289
PURE UUID: 158e997d-72e1-44d3-b25a-10d57508a494
ORCID for A.S. Bahaj: ORCID iD orcid.org/0000-0002-0043-6045
ORCID for P.A.B. James: ORCID iD orcid.org/0000-0002-2694-7054

Catalogue record

Date deposited: 15 Jun 2007
Last modified: 18 Feb 2021 16:42

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