Aerobic microbial manufacture of nanoscale selenium: exploiting nature’s bio-nanomineralization potential |
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| Authors: | N Tejo Prakash Neetu Sharma Ranjana Prakash Kuldeep K Raina Jonathan Fellowes Carolyn I Pearce Jonathan R Lloyd Richard A D Pattrick |
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| Institution: | (1) Department of Biotechnology and Environmental Sciences, Thapar University, Patiala, India;(2) School of Chemistry and Biochemistry, Thapar University, Patiala, India;(3) School of Physics and Material Sciences, Thapar University, Patiala, India;(4) School of Earth, Atmosphere and Environmental Sciences, University of Manchester, Manchester, UK |
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| Abstract: | The potential of the environment to yield organisms that can produce functional bionanominerals is demonstrated by selenium-tolerant,
aerobic bacteria isolated from a seleniferous rhizosphere soil. An isolate, NS3, was identified as a Bacillus species (EU573774.1) based on morphological and 16S rRNA characterization. This strain reduced Se(IV) under aerobic conditions
to produce amorphous α Se(0) nanospheres. A room-temperature washing treatment was then employed to remove the biomass and
resulted in the production of clusters of hexagonal Se(0) nano-rods. The Se(0) nanominerals were analyzed using electron microscopy
and X-ray diffraction techniques. This Bacillus isolate has the potential to be used both in the neutralizing of toxic Se(IV) anions in the environment and in the environmentally
friendly manufacture of nanomaterials. |
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