Date of Award
2020
Degree Type
Dissertation
Degree Name
Doctor of Philosophy (PhD)
Department
Chemistry
Abstract
The goal of this study is to enhance the efficiency of bacterial extracellular electron transfer (EET) in Shewanella oneidensis MR-1 by enhancing adhesion to the electrode's surface. Our results clearly show a major difference in the attachment and behavior of Shewanella oneidensis MR-1 for Ca2+, Pb2+, Cd2+, and Mg2+, compared to the control. the final microbial coverage, as measured by confocal microscopy and cathodic peak charge in cyclic voltammetry (Qpc), increases with increasing metal ion concentrations. We found the cells attached to the electrode increased more with the addition of metal ion concentrations in the following order of metals: Ca2+ > Pb2+ > Cd2+ > Mg2+, compared to the control. the effect of metal ions on the bacteria's metabolism was tested via riboflavin production and glucose consumption. Metabolic activity mirrored the same order of the activity as the electrochemical results.
Recommended Citation
Alshahrani, Aisha Awad, "Metal Ions Impact on Shewanella Oneidensis MR-1 Adhesion to Ito Electrode and the Enhancement of Current Output" (2020). Dissertations. 3769.
https://ecommons.luc.edu/luc_diss/3769
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.
Copyright Statement
Copyright © 2020 Aisha Awad Alshahrani
