The metal reducing bacteria <i>Shewanella oneidensis</i> (shewanella) is widely studied for its unique mechanism of extracellular electron transfer (EET). The EET mechanism of shewanella can be utilized to remove heavy metal pollution from environmental systems, while their sequestration mechanism can be utilized to synthesize metallic nanomaterials. Using modified aerobic growth methods we were able successfully culture shewanella when exposed to varying concentrations of Cd and observe the biosynthesis of CdS nanoparticles. UV-Vis spectroscopy was used to confirm the presence of biosynthesized CdS and using fluorescence microscopy, we were able to ascertain the position of Cd to be found largely on the cell surface while a small portion was also found within the cell. Optimizations of growth conditions are being performed to regulate the size of nanoparticles and place of growth. The results presented here elucidate the potential of shewanella as a tool for bioremediation of heavy metals and biosynthesis of metallic nanomaterials.

Biosynthesis and characterization of Cd nanoparticles from metal reducing bacterium <i>Shewanella oneidensis</i>

2019 Spring National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

Biosynthesis and characterization of Cd nanoparticles from metal reducing bacterium Shewanella oneidensis