1. Jonathan Lloyd School of Earth, Atmospheric and Environmental Sciences The University of Manchester Geomicrobiology.co.uk jon.lloyd@manchester.ac.uk Land Bioremediation and Bionanotechnology Part 2 Industrial Uses of Bacteria 19 May 2010 - IOM 3, London

3. Co-ferrite production by bacteria ACS Nano 3, 1922-1928

4. Particle size measurements XRD Crystallite sizes by fitting the (311) peak using the Scherrer equation Magnetite 15 nm 6% Co-ferrite 16 nm 23% Co-ferrite 8 nm Compares well to the physical particle size from TEM Magnetite 23% Co-ferrite

5. Highly crystalline with high Co content (consistent with Co-ferrite) Magnetic particle size similar to crystal and physical particle size Narrow size distribution obtained (competitive with best synth) Enhanced coercivity (low temp): hyperthermia cancer treatment Consistent with Co 2+ replacing Fe 2+ in octahedral sites Summary of structural and magnetic properties

6. Biomagnetite remediation of organics/inorganics magnetite Cr(VI) reduced to Cr(III) by Fe(II) and incorporated into magnetite structure (resistant to leaching during washing) Chromate magnetite Reactive azo dyes (textile dyes)